Woodward Mslc-2 User manual

37444F

Manual

Software Version 1.15xx

Manual 37444F

MSLC-2

Master Synchronizer and Load Control

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Page 2/226 © Woodward

WARNING

Read this entire manual and all other publications pertaining to the work to be performed before in-

stalling, operating, or servicing this equipment. Practice all plant and safety instructions and precau-

tions. Failure to follow instructions can cause personal injury and/or property damage.

The engine, turbine, or other type of prime mover should be equipped with an overspeed (overtempera-

ture, or overpressure, where applicable) shutdown device(s), that operates totally independently of the

prime mover control device(s) to protect against runaway or damage to the engine, turbine, or other

type of prime mover with possible personal injury or loss of life should the mechanical-hydraulic gov-

ernor(s) or electric control(s), the actuator(s), fuel control(s), the driving mechanism(s), the linkage(s),

or the controlled device(s) fail.

Any unauthorized modifications to or use of this equipment outside its specified mechanical, electrical,

or other operating limits may cause personal injury and/or property damage, including damage to the

equipment. Any such unauthorized modifications: (i) constitute "misuse" and/or "negligence" within

the meaning of the product warranty thereby excluding warranty coverage for any resulting damage

and (ii) invalidate product certifications or listings.

CAUTION

To prevent damage to a control system that uses an alternator or battery-charging device, make sure

the charging device is turned off before disconnecting the battery from the system.

Electronic controls contain static-sensitive parts. Observe the following precautions to prevent dam-

age to these parts.

Discharge body static before handling the control (with power to the control turned off, contact a

grounded surface and maintain contact while handling the control).

Avoid all plastic, vinyl and Styrofoam (except antistatic versions) around printed circuit boards.

Do not touch the components or conductors on a printed circuit board with your hands or with con-

ductive devices.

OUT-OF-DATE PUBLICATION

This publication may have been revised or updated since this copy was produced. To verify that you

have the latest revision, be sure to check the Woodward website.

The revision level is shown at the bottom of the front cover after the publication number. The latest ver-

sion of most publications is available at:

http://www.woodward.com/publications

If your publication is not there, please contact your customer service representative to get the latest

copy.

Important definitions

WARNING

Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation that, if not avoided, could result in damage to equipment.

NOTE

Provides other helpful information that does not fall under the warning or caution categories.

Woodward reserves the right to update anyportion of this publication at any time. Information provided byWoodward is

believed to be correct and reliable. However, Woodward assumes no responsibility unless otherwise expressly under-

taken.

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Revision History

Rev.

Date

Editor

Changes

2016-09-08

New features related to new software version 1.1504 or higher

Added a 2 seconds delay time to the missing member 7594 alarm to compensate time

delays from other/external Ethernet members.

Manual

Describes installation of latest ToolKit version on page 50 ff

2016-04-27

New features related to new software version 1.1503 or higher

The IP address of network A is configurable.

Ethernet channels A and B can be Enabled or Disabled in ToolKit. Items 7860 controls

network A and 7861 controls network B. These items are found in Menu 5.1 –Interfaces

In a Ring Structured application, the MSLC-2 Tie breaker control that connects segment

8 to segment 1, must have item 4544, “Basic segment number”, set for 8. The System A

PT will connect on the segment 8 side of the breaker while the System B PT will connect

to the segment 1 side. The PT connections are opposite all other Tie mode MSLC-2s in

the system.

Utility Unload function operates correctly in a Utility mode control with all segment break-

ers closed.

Synchronizer menu (Menu 1 –Synchronizer), added items 4717, “Phase window ring

structure”, and 4718, “Voltage window ring structure”, to use when attempting to close the

last segment in a ring bus application. There is no active synchronization done when at-

tempting to close the last tie breaker in a ring bus application.

Utility Unload with all 8 segments closed: In case of a closed ring, a check in TIE MSLC2

was added, for direct open the breaker if all segments are closed. For Utility MSLC2 Un-

loading is done therefore. Refer to chapter “Special Function - Synchronizing the last

breaker in a ring structure” for details.

ToolKit

Use version 5.0.2 or higher

Corrections

Modbus address 50082 for reading Discrete Inputs DI22 “Modbus reset”, and DI23 “Sys-

tem Update”are now available. (Appendix C –Data Protocols –Digital Inputs 2)

Manual

Describing changes listed above

“Date” of rev. C corrected

Typo corrections and layout optimizations

2014-12-04

Manual

Correction on page 81 / Parameter 1851 / 1Ph 2W: “System A is connected using L2 L1

phase and neutral or L1 and L2.”

A few typos …

2014-08-01

(2014-01-15)

New features with software revision 1.15xx or higher

Redundant Ethernet with communication handling for Network A and Network B is imple-

mented. Refer to Menu 5.1 –Interfaces on page 90 for details and further description on

page 176ff.

System update function added (parameter 7789, page 86).

Modbus slave (device) parameter Network A (parameter 5351) / Network B (parameter

5451) adjustable in the range from 0 to 255 (page 93).

Now, the Network B-UDP/Modbus IP_Addr is full adjustable

(see Menu 5.1 –Interfaces, page 91).

The closing of the last Breaker in a ring structure is now configurable with extended

ranges of phase angle (parameter 4717 Phase window in ring structure) and voltage win-

dow (parameter 4718 Voltage window ring structure).

Refer to Menu 1 –Synchronizer/

Synchronizer Control on page 67 for details.

Phase angle compensation MCB (parameter 8841) added by a tunable for a phase angle

deviation (parameter 8842) in the range of +/- 180.0°.

CB close hold time (parameter 3417) with extended setting range (page 67).

In case of Utility Unload, the load is ramped to the Unload trip level with the Unload ramp

rate.

The fixed frequency and voltage ramp rates of the digital potentiometers are replaced by

configurable ramp rates (%rated/s) for Frequency- and Voltage- Raise/Lower.

f: DI raise/lower frequency parameter 4713/ 4714; see page 67

V: DI voltage raise/lower parameter 4715/4716; see page 76

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Page 4/226 © Woodward

Rev.

Date

Editor

Changes

Manually synchronization within Permissive Synchronizer mode possible now.

Extended range of power factor: Power factor reference parameter 5620 configurable be-

tween - 0.5 and 0.5. Refer to Menu 4 –Voltage/Var/PF Control/Var Control on page 78

for details.

A new Lamp Test function for LEDs on housing is provided.

Connection plausibility check: System B not connected but Auxiliary Busbar connected,

will lead to the Alarm "System B mismatch" (parameter 7770).

Refer to NOTE at page 35 for details.

New energy counters implemented (see Menu 5.3 and Menu 8 on pages 96/109):

System A pos./neg. active energy counter (kWh,

parameters 2510&2520/2512&2524)

System A pos./neg. reactive energy counter (kvarh,

parameters 2511&2522/2513&2526)

Further setpoints are made adjustable via interface by source selection:

Frequency control setpoint source (parameter 7783, page 66)

Voltage control setpoint source (parameter 7784, page 76)

Monitoring GAP via Ethernet is possible (Woodward service, only!).

The Basic segment number can be set in addition via Interface (Basic segment number

source parameter 7786, page 84)

New segmenting mode: Well-known bus segmenting now is enhanced for device seg-

menting. Refer to New segmenting mode: Well-known bus segmenting now is enhanced

for device segmenting. Refer to page 169 for details.

Data telegram 5200 updated according to the new features.

Refer to Data Protocol 5200 on page 201 for details.

Set minimum values of IDs 10411..10415 from 0000 to 0001 (page 94).

Number of DSLC communicating (4708) and Number of MSLC communicating (parame-

ter 4707) deleted.

ToolKit

New version 4.5 available. Description updated (page 50).

Revision of several menus with additional headers for better overview.

The number of the connected Device is displayed on each menu page heading.

LED for Phase rotation mismatch alarm is displayed on the Home page.

ToolKit connection via Ethernet is now implemented for the connection of multiple de-

vices. One of maximum 16 MSLC can be selected in Tool Device (page 55).

Synchronizer mode (parameter 4602) in ToolKit display extended with “Manual” for man-

ual synchronizer function (see ToolKit homepage, page 61 and Menu 8, page 107).

Overview screens for DSLC-2 and MSLC-2 modified for redundant Ethernet with addi-

tional LED and text for each Unit ID (page 115ff). For description see page 176ff.

Additional alarms (see Menu 8 –Control Status Monitor/

Alarms, page 108):

Connection plausibility check System B mismatch (parameter 7770)

Phase rotation mismatch (parameter 7777)

Communication error NW A (parameter 4615),

Communication error NW B (parameter 7787)

Network A error (parameter 7792), Network B error (parameter 7793)

Devices not matched (parameter 7794)

New menus:

Menu 5.3 –Configure Counters (page 96)

Menu 7, 7.1 and 7.2 –Electrical Parameters (page 102)

Corrections

Improved tie-breaker synchronization between two loadshare groups with bumpless

transfer.

Improved tie-breaker unloading function with bumpless transfer, when the connected util-

ity MSLC has a closed breaker.

The detection of a dead busbar is independent on measured frequency—the voltage am-

plitude is taken into account only.

Manual

Changes described related to the feature update listed above.

Updated terminal description (page 24).

Updated terminal 151, DI 23, and parameter 7789 named to “System update”

(several pages and silkscreen).

Minor corrections.

12-04-20

Minor corrections

11-05-13

Minor corrections

New features

Requirements: Master synchronizer and load control (MSLC-2) with software revision 1.1404

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Rev.

Date

Editor

Changes

or higher and device revision A or higher.

Synchronizer description: Manual synchronizing. Refer to “Table 4-13: Ramping overview



Manual Synchronizing” on page 155 for details.

Modbus communication: Loss of connection. Refer to “Loss of Connection” on page 186

for details.

11-03-24

New Release

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Page 6/226 © Woodward

Content

CHAPTER 1. GENERAL INFORMATION .....................................................................................13

Document Overview .............................................................................................................................. 13

Application ............................................................................................................................................. 14

MSLC-2 function summary.......................................................................................................... 14

Synchronizer.......................................................................................................................................... 14

Load Control .......................................................................................................................................... 15

Process Control ..................................................................................................................................... 17

Var/PF Control....................................................................................................................................... 17

DSLC-2 / MSLC-2 Systems................................................................................................................... 18

Control Relationships in a MSLC-DSLC System ........................................................................ 19

CHAPTER 2. INSTALLATION ....................................................................................................20

Electrostatic Discharge Awareness....................................................................................................... 20

Unpacking.............................................................................................................................................. 21

Location ................................................................................................................................................. 21

Housing.................................................................................................................................................. 22

Dimensions.................................................................................................................................. 22

Installation ................................................................................................................................... 23

Terminal Arrangement................................................................................................................. 24

LEDs............................................................................................................................................ 24

Wiring Diagrams.................................................................................................................................... 25

Connections........................................................................................................................................... 27

Power Supply .............................................................................................................................. 28

Voltage Measuring....................................................................................................................... 29

Current Measuring....................................................................................................................... 38

Power Factor Definition............................................................................................................... 41

Discrete Inputs............................................................................................................................. 43

Relay Outputs.............................................................................................................................. 45

Analog Inputs............................................................................................................................... 47

Interfaces..................................................................................................................................... 48

CHAPTER 3. CONFIGURATION &OPERATION...........................................................................50

Configuration via PC.............................................................................................................................. 50

Install ToolKit Configuration and Visualization Software............................................................. 50

Install ToolKit Software................................................................................................................ 50

Install ToolKit Configuration Files................................................................................................ 51

Starting ToolKit Software............................................................................................................. 52

Configure ToolKit Software ......................................................................................................... 53

Connecting ToolKit and the MSLC-2 Unit ................................................................................... 54

View MSLC-2 Data with ToolKit .................................................................................................. 58

Configuring the MSLC-2 with ToolKit.......................................................................................... 59

The MSLC-2 Version Page ......................................................................................................... 60

Menu (Setpoint) Description.................................................................................................................. 61

MSLC-2 –Homepage.................................................................................................................. 61

Menu 1 –Synchronizer ............................................................................................................... 66

Menu 2 –Load Control................................................................................................................ 70

Menu 3 –Process Control........................................................................................................... 74

Menu 4 –Voltage/Var/PF Control ............................................................................................... 76

Menu 5 –Configuration............................................................................................................... 80

Rule Changes for MSLC-2 segment Connections...................................................................... 86

Menu 6 –Analog Inputs .............................................................................................................. 98

Menu 7, 7.1 and 7.2 –Electrical Parameters............................................................................ 102

Menu 7.1 –System A................................................................................................................ 102

Menu 7.2 –System B................................................................................................................ 105

Menu 8 –Control Status Monitor............................................................................................... 107

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Menu 9 –Discrete Inputs / Discrete (Relay) Outputs ................................................................110

Menu 0 –Diagnostics ................................................................................................................112

Overview Pages.........................................................................................................................115

Prestart Setup Procedure.....................................................................................................................118

Configuration Menu....................................................................................................................118

Prestart Segmenting Setup........................................................................................................119

Prestart Synchronizer Setup......................................................................................................123

Prestart Load Control Setup ......................................................................................................123

Prestart Process Control Setup.................................................................................................123

Prestart Var/Power Factor Control Setup ..................................................................................123

MSLC-2 Control Adjustments...............................................................................................................124

Calibration Check.................................................................................................................................124

Synchronizer Adjustments ...................................................................................................................125

Preliminary Synchronizer Adjustments......................................................................................125

Phase Matching Synchronizer...................................................................................................125

Slip Frequency Synchronizer.....................................................................................................126

Final Synchronizer Setup...........................................................................................................127

Voltage Matching Adjustments ............................................................................................................128

Preliminary Voltage Matching Setup..........................................................................................128

Final Voltage Matching Setup....................................................................................................128

Load Control Adjustment......................................................................................................................129

Base Load Mode Setup .............................................................................................................129

Remote Base Load....................................................................................................................129

Import/Export Mode Setup.........................................................................................................130

Remote Import/Export Setup .....................................................................................................130

Final Load Control Setup...........................................................................................................131

Process Control Adjustment.................................................................................................................132

Var/PF Control Adjustment ..................................................................................................................133

Constant Generator Power Factor Setup ..................................................................................133

PF Control at the Utility - Setup .................................................................................................134

Remote PF Control at the Utility - Setup....................................................................................134

Var Control at the Utility - Setup................................................................................................135

CHAPTER 4. SYNCHRONIZER DESCRIPTION........................................................................... 136

Introduction...........................................................................................................................................136

Functional Description..........................................................................................................................136

Operating Modes .......................................................................................................................136

Measurement Connections (Examples).....................................................................................138

Dead Bus Closure –Multiple Units............................................................................................150

Deadbus Closure Mismatch Alarm ............................................................................................151

Voltage Matching .......................................................................................................................152

Phase Matching Synchronizing .................................................................................................152

Slip Frequency Synchronizing ...................................................................................................152

Permissive Mode / Synch-Check Function................................................................................152

GCB Maximum Closing Attempts..............................................................................................153

Auto re-synchronization.............................................................................................................153

Reclose limit alarm.....................................................................................................................153

Synchronizer Timer....................................................................................................................153

Logic Charter GCB Closure.......................................................................................................154

Ramping.....................................................................................................................................155

Manual Synchronizing..........................................................................................................................157

Frequency Setpoint....................................................................................................................157

Voltage Setpoint.........................................................................................................................157

Breaker Close ............................................................................................................................158

Reset Frequency / Voltage Setpoints Back To Rated (50 Hz or 60 Hz)....................................158

CHAPTER 5. REAL POWER CONTROL DESCRIPTION .............................................................. 159

Introduction...........................................................................................................................................159

MSLC-2 / DSLC-2 Interface.................................................................................................................159

Base Load Mode..................................................................................................................................159

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Page 8/226 © Woodward

Import / Export Mode ........................................................................................................................... 160

Process Control Mode......................................................................................................................... 160

Remote Control.................................................................................................................................... 160

Automatic Power Transfer Control Functions...................................................................................... 160

Ramping Between Modes ......................................................................................................... 160

Utility Unload ............................................................................................................................. 160

Local Unload.............................................................................................................................. 161

CHAPTER 6. VAR/POWER FACTOR CONTROL DESCRIPTION...................................................162

Introduction.......................................................................................................................................... 162

Constant Generator Power Factor....................................................................................................... 162

Power Factor Control........................................................................................................................... 163

Var Control........................................................................................................................................... 163

CHAPTER 7. PROCESS CONTROL DESCRIPTION ....................................................................164

Introduction.......................................................................................................................................... 164

Description........................................................................................................................................... 164

CHAPTER 8. NETWORK /SYSTEM DESCRIPTION ....................................................................167

Introduction.......................................................................................................................................... 167

Description........................................................................................................................................... 167

Applications without Segmenting .............................................................................................. 168

Applications with Segmenting ................................................................................................... 169

Not Supported Applications....................................................................................................... 172

Remote Control by PLC....................................................................................................................... 173

Interface Connection via RS-485 with Modbus Protocol........................................................... 173

Interface Connection via Ethernet by Modbus/TCP Stack........................................................ 174

CHAPTER 9. INTERFACE.......................................................................................................175

Interface Overview............................................................................................................................... 175

Communication management ................................................................................................... 176

Commissioning of the Communication Network System .......................................................... 177

Ethernet Load Sharing......................................................................................................................... 179

Multi-Master Principle................................................................................................................ 179

Load Share Monitoring.............................................................................................................. 179

General Load Share Information............................................................................................... 179

Modbus Communications.................................................................................................................... 180

General Information................................................................................................................... 180

Address Range.......................................................................................................................... 180

Visualization .............................................................................................................................. 181

Configuration............................................................................................................................. 182

MSLC-2 Interface Remote Control............................................................................................ 183

Changing Parameter Settings via Modus............................................................................................ 190

Parameter Setting...................................................................................................................... 190

Remotely Resetting the Default Values..................................................................................... 192

Modbus Parameters ............................................................................................................................ 194

Serial Interface 1 ....................................................................................................................... 194

Serial Interface 2 ....................................................................................................................... 194

Network A –Modbus................................................................................................................. 194

Network B –Modbus................................................................................................................. 194

CHAPTER 10. APPLICATION .................................................................................................195

Phase Angle Compensation................................................................................................................ 195

Connecting 24 V Relays...................................................................................................................... 200

Data Protocol 5200.............................................................................................................................. 201

Introduction.......................................................................................................................................... 211

Parameter List Columns............................................................................................................ 211

Parameter List ..................................................................................................................................... 212

Product Service Options...................................................................................................................... 222

Returning Equipment for Repair.......................................................................................................... 222

Packing a Control...................................................................................................................... 223

Return Authorization Number RAN ........................................................................................... 223

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Replacement Parts...............................................................................................................................223

How to Contact Woodward ..................................................................................................................224

Engineering Services ...........................................................................................................................224

Technical Assistance ...........................................................................................................................225

Figures and Tables

Figures

Figure 1-2: MSLC-2 Load Control Overview...........................................................................................................16

Figure 1-3: Multiple generators in isolated operation with tie-breaker.....................................................................18

Figure 1-4: Multiple generators in isolated and utility parallel operation with utility- and tie-breaker.......................19

Figure 1-5: Control relationship in a MSLC-DSLC system......................................................................................19

Figure 2-1: Housing MSLC-2 - dimensions.............................................................................................................22

Figure 2-2: Housing - drill plan................................................................................................................................23

Figure 2-4: Wiring diagram - MSLC-2 - 1/2.............................................................................................................25

Figure 2-5: Wiring diagram - MSLC-2 - 2/2.............................................................................................................26

Figure 2-6: Power supply........................................................................................................................................28

Figure 2-7: Power supply - crank waveform at maximum load................................................................................28

Figure 2-8: Voltage measuring –system A.............................................................................................................29

Figure 2-9: Voltage measuring –system A windings, 3Ph 4W OD.........................................................................30

Figure 2-10: Voltage measuring –system A measuring inputs, 3Ph 4W OD..........................................................30

Figure 2-11: Voltage measuring –system A windings, 3Ph 4W..............................................................................31

Figure 2-12: Voltage measuring –system A measuring inputs, 3Ph 4W ................................................................31

Figure 2-13: Voltage measuring –system A windings, 3Ph 3W..............................................................................32

Figure 2-14: Voltage measuring –system A measuring inputs, 3Ph 3W ................................................................32

Figure 2-15: Voltage measuring –system B...........................................................................................................33

Figure 2-16: Voltage measuring –system B measuring inputs, 1Ph 2W (phase-neutral).......................................34

Figure 2-17: Voltage measuring –system B measuring inputs, 1Ph 2W (phase-phase)........................................34

Figure 2-18: Voltage measuring –auxiliary system B.............................................................................................35

Figure 2-19: Voltage measuring - auxiliary system B PT windings, 3Ph 4W...........................................................36

Figure 2-20: Voltage measuring - auxiliary system B measuring inputs, 3Ph 4W...................................................36

Figure 2-21: Voltage measuring - auxiliary system B PT windings, 3Ph 3W...........................................................37

Figure 2-22: Voltage measuring - auxiliary system B measuring inputs, 3Ph 3W...................................................37

Figure 2-23: Current measuring –system A ...........................................................................................................38

Figure 2-24: Current measuring –system A, L1 L2 L3 ...........................................................................................39

Figure 2-25: Current measuring - system A, phase Lx............................................................................................39

Figure 2-26: Power measuring - direction of power ................................................................................................40

Figure 2-27: Phasor diagram –inductive / capacitive .............................................................................................42

Figure 2-28: Discrete inputs - alarm/control input - positive signal..........................................................................43

Figure 2-29: Discrete inputs - alarm/control input - negative signal ........................................................................43

Figure 2-30: Relay outputs......................................................................................................................................45

Figure 2-31: Analog inputs - wiring two-pole senders using a voltage signal..........................................................47

Figure 2-32: Analog inputs - wiring two-pole senders (external jumper used for current signal).............................47

Figure 2-33: RS-485 interface #1 - overview...........................................................................................................48

Figure 2-34: RS-485 Modbus - connection for half-duplex operation......................................................................48

Figure 2-35: RS-485 Modbus - connection for full-duplex operation.......................................................................48

Figure 2-36: RS-232 interface - overview................................................................................................................49

Figure 2-37: RJ-45 interfaces - overview ................................................................................................................49

Figure 3-1: ToolKit - visualization screen................................................................................................................58

Figure 3-2: ToolKit - analog value trending screen .................................................................................................58

Figure 3-3: ToolKit - configuration screen...............................................................................................................59

Figure 3-4: ToolKit -version page............................................................................................................................60

Figure 3-5: ToolKit - home page (MSLC-2 configured as utility breaker control).....................................................61

Figure 3-6: ToolKit - home page (MSLC-2 configured as tie-breaker control).........................................................62

Figure 3-10: ToolKit - home page - MSLC-2 configured as utility breaker control...................................................64

Figure 3-11: ToolKit - home page - MSLC-2 configured as tie-breaker control.......................................................65

Figure 3-12: ToolKit - home page - segments.........................................................................................................65

Figure 3-13: ToolKit –synchronizer........................................................................................................................66

Figure 3-17: ToolKit –load control..........................................................................................................................70

Figure 3-22: ToolKit –process control ....................................................................................................................74

Figure 3-26: ToolKit –voltage/var/pf control ...........................................................................................................76

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Page 10/226 © Woodward

Figure 3-31: ToolKit –configuration........................................................................................................................80

Figure 3-38: ToolKit –interfaces.............................................................................................................................90

Figure 3-47: ToolKit –system management...........................................................................................................94

Figure 3-53: ToolKit –configure counters...............................................................................................................96

Figure 3-55: ToolKit –analog inputs.......................................................................................................................98

Figure 3-56: ToolKit –relevant fields for remote load reference input....................................................................98

Figure 3-57: ToolKit –relevant fields for remote process reference input ..............................................................99

Figure 3-59: ToolKit –process signal input ..........................................................................................................100

Figure 3-61: ToolKit –reactive load input.............................................................................................................101

Figure 3-63: ToolKit –electrical parameters.........................................................................................................102

Figure 3-64: ToolKit –electrical parameters System A.........................................................................................102

Figure 3-74: ToolKit –electrical parameters System B.........................................................................................105

Figure 3-83: ToolKit –control status monitor........................................................................................................107

Figure 3-88: ToolKit –discrete inputs / relay outputs............................................................................................110

Figure 3-93: ToolKit –diagnostics........................................................................................................................113

Figure 3-96: ToolKit –MSLC-2 overview page.....................................................................................................116

Figure 3-97: ToolKit –DSLC-2 overview page .....................................................................................................117

Figure 3-98: Example of an online diagram –step 1............................................................................................119

Figure 3-99: Example of an online diagram with segment numbers and segment connector feedbacks .............120

Figure 3-100: Example of an online diagram with according network...................................................................121

Figure 3-101: Example of an online diagram with all required information to setup the units...............................122

Figure 3-102: Power measurement......................................................................................................................124

Figure 4-1: Synchronizer block diagram...............................................................................................................137

Figure 4-2: Low voltage system 480 V / 277 V –3-phase with neutral.................................................................138

Figure 4-3: Low voltage system 480 V / 277 V –3-phase with neutral.................................................................139

Figure 4-4: Low voltage system 480 V –3-phase with neutral .............................................................................140

Figure 4-5: Low voltage system 600 V / 346 V –3-phase....................................................................................141

Figure 4-6: Low voltage system 600 V / 346 V –3-phase....................................................................................142

Figure 4-7: Low voltage system 600 V / 346 V –3-phase....................................................................................143

Figure 4-8: Low voltage system 600 V / 346 V –3-phase with neutral.................................................................144

Figure 4-9: Low voltage system 600 V / 346 V –3-phase with neutral.................................................................145

Figure 4-10: Low voltage system 600 V / 346 V –3-phase with neutral...............................................................146

Figure 4-11: Low voltage system 600 V / 346 V –3-phase with neutral...............................................................147

Figure 4-12: Middle voltage system 20 kV –3-phase without neutral...................................................................148

Figure 4-13: Middle voltage system 20 kV –3-phase without neutral...................................................................149

Figure 4-14: Dead bus closing –Example of dead busbar closure arbitration......................................................150

Figure 4-15: Logic charter CB closure..................................................................................................................154

Figure 7-1: Diagram process control ....................................................................................................................166

Figure 8-1: Multiple generators in isolated operation without tie-breakers............................................................168

Figure 8-2: Multiple generators in isolated / parallel to utility operation without tie-breakers................................168

Figure 8-3: Isolated operation with multiple generator and tie-breaker.................................................................169

Figure 8-4: Isolated / utility parallel operation with multiple generator and tie-breaker.........................................169

Figure 8-5: Isolated / utility parallel operation with multiple generator, tie-breaker and generator group breaker.170

Figure 8-6: Isolated operation with multiple generator and tie-breaker (ring option).............................................171

Figure 8-7: Not supported application...................................................................................................................172

Figure 8-8: Not supported application...................................................................................................................172

Figure 8-9: Visualization and remote control by PLC via RS-485 interface ..........................................................173

Figure 9-1: MSLC-2 - interface overview (housing - side view) ............................................................................175

Figure 9-2: Modbus - visualization configurations.................................................................................................181

Figure 9-3: Modbus - sending binary digital orders over interface........................................................................185

Figure 9-4: Modbus –loss of connection..............................................................................................................187

Figure 9-5: Modbus - configuration example 1 - active power..............................................................................188

Figure 9-6: Modbus - configuration example 2 –power factor..............................................................................189

Figure 9-7: Modbus - configuration example 1 .....................................................................................................190

Figure 9-8: Modbus - configuration example 2 .....................................................................................................191

Figure 9-9: Modbus - configuration example 3 .....................................................................................................191

Figure 9-10: Modbus - remote control parameter 1701........................................................................................192

Figure 9-11: Modbus - write register - enable the resetting procedure via RS-232 or Modbus TCP/IP................192

Figure 9-12: Modbus - remote control parameter 1701........................................................................................193

Figure 9-13: Modbus - write register - resetting the default values.......................................................................193

Fig. 201: Phase angle compensation MCB ..........................................................................................................195

Figure 10-1: Interference suppressing circuit - connection...................................................................................200

Tables

Table 1-1: Manual - overview .................................................................................................................................13

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Table 2-1: Conversion chart - wire size...................................................................................................................27

Table 2-2: Power supply - terminal assignment......................................................................................................28

Table 2-3: Voltage measuring –terminal assignment –System A voltage.............................................................29

Table 2-4: Voltage measuring - terminal assignment –System A, 3Ph 4W OD......................................................30

Table 2-5: Voltage measuring –terminal assignment –system A, 3Ph 4W............................................................31

Table 2-6: Voltage measuring - terminal assignment –system A, 3Ph 3W.............................................................32

Table 2-7: Voltage measuring - terminal assignment –system B voltage...............................................................33

Table 2-8: Voltage measuring - terminal assignment –system B, 1Ph 2W (phase-neutral) ...................................34

Table 2-9: Voltage measuring - terminal assignment –system B, 1Ph 2W (phase-phase).....................................34

Table 2-10: Voltage measuring - terminal assignment - auxiliary system B voltage ...............................................35

Table 2-11: Voltage measuring - terminal assignment - auxiliary system B, 3Ph 4W.............................................36

Table 2-12: Voltage measuring - terminal assignment - auxiliary system B, 3Ph 3W.............................................37

Table 2-13: Current measuring - terminal assignment –system A current .............................................................38

Table 2-14: Current measuring - terminal assignment –system A, L1 L2 L3..........................................................39

Table 2-15: Current measuring - terminal assignment - system A, phase Lx..........................................................39

Table 2-16: Power Measuring –sign displayed –Utility / Tie..................................................................................40

Table 2-17: Power measuring - terminal assignment..............................................................................................40

Table 2-18: Discrete input - terminal assignment 1/2..............................................................................................43

Table 2-19: Discrete input - terminal assignment 2/2..............................................................................................44

Table 2-21: Relay outputs - terminal assignment....................................................................................................45

Table 2-22: Relay outputs driven by …...................................................................................................................46

Table 2-23: Analog inputs - terminal assignment - wiring two-pole senders...........................................................47

Table 2-24: RS-485 interface #1 - pin assignment..................................................................................................48

Table 2-25: RS-232 interface - pin assignment.......................................................................................................49

Table 2-26: RJ-45 interfaces - pin assignment........................................................................................................49

Table 3-7: Parameter –homepage - General .........................................................................................................63

Table 3-8: Parameter –homepage - Setpoints.......................................................................................................63

Table 3-9: Parameter –homepage –Process control.............................................................................................63

Table 3-14: Parameter –synchronizer –PID frequency control..............................................................................67

Table 3-15: Parameter –synchronizer –PID voltage control..................................................................................67

Table 3-16: Parameter –synchronizer –synchronizer control................................................................................69

Table 3-18: Parameter –load control –PID import/export control ..........................................................................70

Table 3-19: Parameter –load control –power control monitoring...........................................................................71

Table 3-20: Parameter –load control –power control ............................................................................................72

Table 3-21: Parameter –load control –import/export level via interface................................................................73

Table 3-23: Parameter –process control –PID process control.............................................................................74

Table 3-24: Parameter –process control –process control....................................................................................75

Table 3-25: Parameter –process control –process signal input monitoring...........................................................75

Table 3-27: Parameter –voltage/var/pf control –voltage control............................................................................76

Table 3-28: Parameter –voltage/var/pf control –voltage monitoring......................................................................77

Table 3-29: Parameter –voltage/var/pf control –PID VAR control.........................................................................77

Table 3-30: Parameter –voltage/var/pf control –VAR control................................................................................79

Table 3-32: Parameter –configuration....................................................................................................................82

Table 3-33: Parameter –configuration –transformer .............................................................................................83

Table 3-34: Parameter –configuration –operating ranges.....................................................................................84

Table 3-35: Parameter –configuration –system settings.......................................................................................85

Table 3-36: Parameter –configuration –tie breaker...............................................................................................85

Table 3-37: Parameter –configuration –communication........................................................................................86

Table 3-39: Parameter –interfaces –serial 1 –RS232 ..........................................................................................90

Table 3-40: Parameter –interfaces –serial 1 –Modbus ........................................................................................91

Table 3-41: Parameter –interfaces –serial 2 –RS485 ..........................................................................................91

Table 3-42: Parameter –interfaces –serial 2 –Modbus ........................................................................................91

Table 3-43: Parameter –interfaces –network A.....................................................................................................91

Table 3-44: Parameter –interfaces –network B.....................................................................................................92

Table 3-45: Parameter –interfaces –format Modbus protocol...............................................................................93

Table 3-46: Parameter –interfaces –Modbus TCP................................................................................................93

Table 3-48: Parameter –system management –password system .......................................................................95

Table 3-49: Parameter –system management –password....................................................................................95

Table 3-50: Parameter –system management –active code levels.......................................................................96

Table 3-51: Parameter –system management –factory settings...........................................................................96

Table 3-52: Parameter –system management –power supply..............................................................................96

Table 3-54: Parameter –configure counters...........................................................................................................97

Table 3-58: Parameter –analog inputs –reference input: remote load/process...................................................100

Table 3-60: Parameter –analog inputs –process signal input .............................................................................100

Table 3-62: Parameter –analog inputs –reactive load input................................................................................101

Table 3-65: Parameter –System A –active power...............................................................................................102

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Page 12/226 © Woodward

Table 3-66: Parameter –system A –reactive power............................................................................................103

Table 3-67: Parameter –system A –apparent power..........................................................................................103

Table 3-68: Parameter –System A –voltage phase-phase.................................................................................103

Table 3-69: Parameter –System A –voltage phase-neutral................................................................................103

Table 3-70: Parameter –system A –power factor ...............................................................................................103

Table 3-71: Parameter –System A –current .......................................................................................................104

Table 3-72: Parameter –System A –frequency...................................................................................................104

Table 3-73: Parameter –system A –phase rotation ............................................................................................104

Table 3-75: Parameter –system B –voltage .......................................................................................................105

Table 3-76: Parameter –system B –frequency ...................................................................................................105

Table 3-77: Parameter –system B –phase angle................................................................................................105

Table 3-78: Parameter –System B –phase rotation............................................................................................105

Table 3-79: Parameter –aux. system B –voltage phase-phase..........................................................................106

Table 3-80: Parameter –aux. system B –voltage phase-neutral.........................................................................106

Table 3-81: Parameter –aux. system B –frequency............................................................................................106

Table 3-82: Parameter –auxiliary system B –phase rotation ..............................................................................106

Table 3-84: Parameter –control status monitor....................................................................................................108

Table 3-85: Parameter –control status monitor - alarms......................................................................................109

Table 3-86: Parameter –control status monitor –System A energy counters......................................................109

Table 3-87: Parameter –control status monitor –communication management..................................................109

Table 3-89: Parameter –discrete inputs / outputs –discrete inputs.....................................................................111

Table 3-90: Parameter –discrete inputs / outputs –discrete input source...........................................................112

Table 3-91: Parameter –discrete inputs / outputs –relay outputs........................................................................112

Table 3-92: Parameter –discrete inputs / outputs –segments ............................................................................112

Table 3-94: Parameter –diagnostics....................................................................................................................114

Table 3-95: System Status quick info at overview pages .....................................................................................115

Table 3-30: Parameter –MSLC-2 overview page.................................................................................................116

Table 3-29: Parameter –DSLC-2 overview page.................................................................................................117

Table 4-1: Low voltage system 480 V / 277 V –3-phase with neutral..................................................................138

Table 4-2: Low voltage system 480 V / 277 V –3-phase with neutral..................................................................139

Table 4-3: Low voltage system 480 V –3-phase with neutral ..............................................................................140

Table 4-4: Low voltage system 600 V / 346 V –3-phase .....................................................................................141

Table 4-5: Low voltage system 600 V / 346 V –3-phase .....................................................................................142

Table 4-6: Low voltage system 600 V / 346 V –3-phase .....................................................................................143

Table 4-7: Low voltage system 600 V / 346 V –3-phase with neutral..................................................................144

Table 4-8: Low voltage system 600 V / 346 V –3-phase with neutral..................................................................145

Table 4-9: Low voltage system 600 V / 346 V –3-phase with neutral..................................................................146

Table 4-10: Low voltage system 600 V / 346 V –3-phase with neutral................................................................147

Table 4-11: Middle voltage system 20 kV –3-phase without neutral....................................................................148

Table 4-12: Middle voltage system 20 kV –3-phase without neutral....................................................................149

Table 4-13: Ramping overview.............................................................................................................................156

Table 9-1: MSLC-2 - Interfaces - overview...........................................................................................................175

Table 9-2: Modbus - address range......................................................................................................................180

Table 9-3: Modbus - address range block read....................................................................................................181

Table 9-4: Modbus - address calculation..............................................................................................................182

Table 9-5: Modbus - data types............................................................................................................................182

Table 9-6: Modbus –sending setpoints over interface .........................................................................................183

Table 9-7: Modbus –sending binary digital orders over interface ........................................................................184

Table 9-8: Modbus –sending binary digital orders over interface ........................................................................186

Table 9-9: Modbus –password for serial interface 1............................................................................................190

Table 9-10: Modbus –generator rated voltage.....................................................................................................191

Table 9-11: Modbus –generator voltage measuring............................................................................................191

Table 9-12: Modbus –reset default values...........................................................................................................192

Table 9-13: Modbus - serial interface 1 - parameters...........................................................................................194

Table 9-14: Modbus - serial interface 2 –parameters..........................................................................................194

Table 9-16: Modbus - TCP/IP Network A–parameters ........................................................................................194

Table 9-15: Modbus - TCP/IP Network B–parameters ........................................................................................194

Table 10-1: Technical Data ..................................................................................................................................197

Table 10-2: Environmental Data...........................................................................................................................198

Table 10-3: Accuracy............................................................................................................................................199

Table 10-4: Interference suppressing circuit for relays.........................................................................................200

Table 10-5: Data Protocol 5200............................................................................................................................210

(Sequence following ID number) ..........................................................................................................................212

Table 10-6: Parameter list....................................................................................................................................221

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Chapter 1.

General Information

Document Overview

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

This manual describes the Woodward MSLC-2TM Master Synchronizer and Load Control.

Type

English

German

MSLC-2

DSLC-2 –User Manual

37443

MSLC-2 –User Manual

this manual 

37444

Table 1-1: Manual - overview

Intended Use The unit must only be operated in the manner described by this manual. The prerequi-

site for a proper and safe operation of the product is correct transportation, storage and installation as

well as careful operation and maintenance.

NOTE

This manual has been developed for a unit fitted with all available options. Inputs/outputs, functions,

configuration screens and other details described, which do not exist on your unit, may be ignored.

The present manual has been prepared to enable the installation and commissioning of the unit. Due to

the large variety of parameter settings, it is not possible to cover every combination. The manual is

therefore only a guide.

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Page 14/226 © Woodward

Application

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

The Woodward MSLC-2™ control is the direct successor of the former MSLC™master synchronizer

and load control. The MSLC-2™ is a microprocessor-based overall plant load control designed for use

in a system with Woodward DSLC-2TM (“Digital Synchronizer and Load Control”) controls on each gen-

erator to provide utility synchronizing, paralleling, loading and unloading of a three-phase generating

system.

Applications allow up to 32 generators to be paralleled and controlled in conjunction with up to 16

MSLC-2. A dedicated Ethernet system provides seamless communications between DSLC-2TM and

MSLC-2TM units. A second Ethernet port is provided for customer remote control and monitoring capa-

bility using Modbus TCP allowing DCS and PLC interfacing. Both together can be used as a redundant

Ethernet system. Additionally a Modbus RTU is available through a separate RS-485 port.

MSLC-2 function summary

Original MSLC functions include:

Selectable for phase matching or slip frequency synchronizing between the utility and a local

bus with voltage matching

Automatic system loading and unloading for bumpless load transfer

Import/export level control capability

Process control for cogeneration, pressure, maintenance or other process

Proportional loading of associated DSLC-2 controls in isochronous load sharing

Adjustable power factor control

Built in diagnostics with relay output

Multifunction adjustable high and low limit alarms and adjustable load switches with relay out-

puts

Digital communications network to provide loading and power factor control of individual

DSLC-2 equipped generators

Additional MSLC-2 functions include:

Automatic dead bus closure capability for tie-breakers

Multiple utility breaker and tie-breaker MSLC-2s on the same bus segment

One dedicated Ethernet line for precise system communications between all DSLC-2s and

MSLC-2s on the system

Ethernet Modbus/TCP for remote control and monitoring

Serial Modbus RS-485 for remote control and monitoring

Applications with up to 32 DSLC-2 and 16 MSLC-2

Automatic segment control (self-recognizing of the segment)

Full setup, metering and diagnostic capability through the PC program ToolKit

Synchronizer

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

Either phase matching or slip frequency synchronizing may be selected. Phase matching provides

rapid synchronizing for critical standby power applications. Slip frequency synchronizing ensures that

the initial flow of power will be either out of the local system (export) or into the local system (import),

depending on whether a positive or negative slip is chosen. For both synchronizing methods, the

MSLC-2 uses actual slip frequency and breaker delay values to anticipate an adjustable minimum

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

phase difference between the utility and the local bus. Additional synchronizer functions include volt-

age matching, time delayed automatic multi-shot reclosing, auto-resynchronizing and a synchronizer

timeout alarm. Each of these features may be enabled or disabled during setup.

The MSLC-2 control provides a safe automatic dead bus closure function. Deadbus closing permission

is granted to only one DSLC-2 or MSLC-2 control in the whole system through locking techniques done

over the communications network.

The MSLC-2, configured as tie-breaker control, allows selecting different closure modes or all modes:

Alive bus A -> dead bus B

Dead bus A -> dead bus B

Alive bus B -> dead bus A

Load Control

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

The MSLC-2 has four load control modes available:

Base load

Import/export

Process

Utility unload

Load control begins with the breaker closure of the utility and another discrete input selecting the load

control mode wanted. If no load control mode is selected the MSLC-2 will be in the offline mode. The

system load immediately prior to breaker closure is used as the starting base load reference. On com-

mand, the adjustable ramp allows smooth, time controlled loading into a set import/export level. A ramp

pause switch is provided to stop the ramp at any point.

The import/export control is an integrating control. It adjusts the percentage of rated load carried by the

individual generators, operating in isochronous load sharing, in order to maintain a set import/export or

base load level. The MSLC-2 will maintain a constant base load or import/export level even with chang-

ing utility frequencies. The MSLC-2 provides switch inputs to allow raising or lowering the internal digi-

tal base load or import/export reference. The control also provides a remote analog signal input for ref-

erence setting, if desired. (Signal variety: 0 to 20 mA, 4 to 20 mA, 0 to 5 V, 1 to 5 V and 0 to 10 V)

The MSLC-2 is equipped with a utility unload switch, which provides an adjustable time controlled ramp

to lower the base load or import/export level. When the level is below an adjustable threshold, the

MSLC-2 issues a breaker open command to separate the utility from the local bus. The ramp pause

switch can be used to stop the utility unload at any point. The maximum load that the MSLC-2 can tell

the individual generators to carry is their rated loads. So, in the event that the plant load is greater than

the capacity of the operating generators, the utility unload will stop when 100% rated load is reached

on each of the operating generators. This prevents accidental overloading of the local generators.

The MSLC-2 also includes two adjustable load switches which can be used for external functions or

warnings when chosen system load levels are attained. The high and low limit switches may also be

activated when 100% or 0% load signal to the generators is reached.

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Figure 1-2: MSLC-2 Load Control Overview

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Process Control

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

A process controller is provided for cogeneration, fluid level maintenance, pressure control or other ap-

plications. An adjustable bandwidth signal input filter, flexible PID controller adjustments, selectable for

direct or indirect action, allow the process control to be used in a wide variety of applications.

An analog signal input (signal variety: 0 to 20mA, 4 to 20mA, 0 to 5V, 1 to 5V and 0 to 10V) provides

the process signal to the MSLC-2. The MSLC-2 includes an internal digital process reference, which

may be controlled by the raise and lower switch contact inputs or by an external analog input signal as

remote process reference. The MSLC-2 also has a Modbus address for process reference control. The

output of the process control, like the import/export control, is the percentage of rated load setpoint to

the individual generators in isochronous load sharing.

An adjustable ramp allows smooth entry and exit from the process control mode. When the process

control mode is selected, the load reference is ramped in a direction to reduce the error between the

process input and the process reference. When the error is minimized or the reference first reaches

either the high or the low specified limits, the process controllers PID loop is activated. When the load

reference output reaches either 100% or 0%, the control will maintain that load reference until process

control is established.

The MSLC-2 is not capable of overloading or reverse powering the generators in an attempt to meet

the process reference. The high and low limit switches mentioned above can be used to indicate that

either too many or too few generators are online to maintain the process within its limits.

Var/PF Control

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

The var/PF function controls the power factor on all of the DSLC-2 equipped machines operating in

isochronous load sharing. The PF control begins on breaker closure. The MSLC-2 has three modes of

Var/PF control (which are selected in Menu 4):

Constant generator power factor –sets the power factor reference on all of the DSLC-2 con-

trols to the internal reference chosen in the MSLC-2. The power factor can then be adjusted

using the voltage raise and lower inputs. The voltage raise command will make the power fac-

tor more lagging. Conversely, the voltage lower command will make the power factor more

leading.

Utility tie power factor control –adjusts the power factor reference on all of the DSLC-2 con-

trols in isochronous load sharing in order to maintain the power factor across the utility tie.

Utility tie var control –adjusts the power factor reference on all of the DSLC-2 controls in

isochronous load sharing in order to maintain the level of vars being imported or exported from

the utility.

The var/PF control mode begins with the load control mode selected. The constant generator power

factor and the utility tie power factor control can have the reference setting controlled by an analog in-

put (see Menu 6). By closing the voltage raise and lower discrete inputs, you can select the analog re-

mote input for reference control.

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

DSLC-2 / MSLC-2 Systems

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

The network addressing of the DSLC-2 / MSLC-2 allows up to 32 DSLC-2s and 16 MSLC-2s in an ap-

plication. A DSLC-2 and MSLC-2 application can handle 8 segments. Discrete inputs inform the DSLC-

2s and MSLC-2s which segments each generator and utilities are operating on. If a MSLC-2 receives a

discrete input to activate segment 1 and 2, it will share this information with all controls over the Ether-

net bus. It is not necessary to provide a segment activation discrete input to all controls. Segmenting

allows the DSLC-2s and MSLC-2s to remain connected thru the Ethernet bus, but be operating on sep-

arate load buses.

The DSLC-2 / MSLC-2 system can be applied according to following rules:

The maximum number of DSLC-2s (Gen-CB) is 32.

The maximum number of MSLC-2s (Utility- or Tie-CB) is 16.

The maximum number of segments is 8.

The segment numbers have to follow a line, which can finally be closed to a ring.

For DSLC-2 it can be selected between two segmenting modes:

oBus segmenting determining generators running together via an algorithm.

oDevice segmenting determining generators running together from outside.

Only one MSLC-2 can be used as master control, when multiple MSLC-2 is resided in one

segment.

oThe MSLC-2 with the lower device number will control if multiple Utility MSLC-2s are

active on the same segment

The generator is not counted as a segment.

The utility is not counted as a segment.

NOTE

If different MSLC-2s, located in different segments, are connected via a tie-MSLC-2, more than one

MSLC-2 is now located in the same segment. The result is the MSLC-2 with the lowest device number

becomes the master of all MSLC-2s located in this segment.

Examples (DSLC-2 with Bus Segmenting):

Figure 1-3: Multiple generators in isolated operation with tie-breaker

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Figure 1-4: Multiple generators in isolated and utility parallel operation with utility- and tie-breaker

Control Relationships in a MSLC-DSLC System

A MSLC / DSLC system is defined through minimum of one MSLC device and one DSLC device.

A DSLC is only controlled by a MSLC, if:

The MSLC resides in the same segment

The MSLC has got a master function, like:

oDI Sync Run

oDI Sync Check

oDI Manual (DI Sync

Check AND DI Sync

Permissive)

oDI Base Load Con-

trol

oDI Import/Export

Control

oDI Process Control

oDI Utility Unload

The according DSLC is lis-

tening on the master MSLC,

which means:

oDI Base Load is not

active

oDI Process Control is

not active

oDI Load/Unload is

active

Figure 1-5: Control relationship in a MSLC-DSLC system

Manual 37444F MSLC-2 - Master Synchronizer and Load Control

Chapter 2.

Installation

Electrostatic Discharge Awareness

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

All electronic equipment is static-sensitive, some components more than others. To protect these com-

ponents from static damage, you must take special precautions to minimize or eliminate electrostatic

discharges.

Follow these precautions when working with or near the control.

1. Before doing maintenance on the electronic control, discharge the static electricity on your body to

ground by touching and holding a grounded metal object (pipes, cabinets, equipment, etc.).

2. Avoid the build-up of static electricity on your body by not wearing clothing made of synthetic ma-

terials. Wear cotton or cotton-blend materials as much as possible because these do not store

static electric charges as easily as synthetics.

3. Keep plastic, vinyl and Styrofoam materials (such as plastic or Styrofoam cups, cigarette pack-

ages, cellophane wrappers, vinyl books or folders, plastic bottles, etc.) away from the control,

modules and work area as much as possible.

4. Opening the control cover may void the unit warranty.

Do not remove the printed circuit board (PCB) from the control cabinet unless absolutely neces-

sary. If you must remove the PCB from the control cabinet, follow these precautions:

Ensure that the device is completely voltage-free (all connectors have to be disconnected).

Do not touch any part of the PCB except the edges.

Do not touch the electrical conductors, connectors, or components with conductive devices or

with bare hands.

When replacing a PCB, keep the new PCB in the plastic antistatic protective bag it comes in

until you are ready to install it. Immediately after removing the old PCB from the control cabi-

net, place it in the antistatic protective bag.

CAUTION

To prevent damage to electronic components caused by improper handling, read and observe the pre-

cautions in Woodward manual 82715, Guide for Handling and Protection of Electronic Controls, Printed

Circuit Boards and Modules.

NOTE

The unit is capable to withstand an electrostatic powder coating process with a voltage of up to 85 kV

and a current of up to 40 µA.

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