Woodward LS 4 User manual

37105C
Manual
Software Version 3.2xxx
Manual 37105C
LS 4
Circuit Breaker Control

Manual 37105C LS 4 - Circuit Breaker Control
Page 2/92 © Woodward
WARNING
Read this entire manual and all other publications pertaining to the work to be performed before instal-
ling, operating, or servicing this equipment. Practice all plant and safety instructions and precautions.
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
conductive 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OUT-OF-DATE PUBLICATION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:
http://www.woodward.com/pubs/current.pdf
The revision level is shown at the bottom of the front cover after the publication number. The latest
version 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 any portion of this publication at any time. Information provided by Woodward is believed to be
correct and reliable. However, Woodward assumes no responsibility unless otherwise expressly undertaken.
© Woodward
All Rights Reserved.

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 3/92
Revision History
Rev. Date Editor Changes
NEW 04-01-01 Tr Release
A 04-05-14 TP Minor corrections
B 06-04-19 TP Technical review
C 08-11-26 TE Minor corrections
Contents
CHAPTER 1. GENERAL INFORMATION..........................................................................................7
CHAPTER 2. ELECTROSTATIC DISCHARGE AWARENESS ..............................................................8
CHAPTER 3. INSTALLATION.........................................................................................................9
Wiring Diagram ......................................................................................................................................10
Power Supply .........................................................................................................................................11
Measuring Inputs....................................................................................................................................11
Voltage - System [A] ....................................................................................................................11
Voltage - System [B] ....................................................................................................................12
Current - System [A] ....................................................................................................................13
Discrete Inputs .......................................................................................................................................14
Positive Logic...............................................................................................................................14
Negative Logic .............................................................................................................................14
Relay Outputs ........................................................................................................................................15
Interface .................................................................................................................................................16
Interface Connection....................................................................................................................16
CAN Bus Shielding ......................................................................................................................16
CAN Bus Topology ......................................................................................................................17
DPC - Direct Configuration Interface ...........................................................................................18
CHAPTER 4. FUNCTIONAL DESCRIPTION ...................................................................................19
Introduction ............................................................................................................................................19
Measuring Values ........................................................................................................................19
General Functions .......................................................................................................................19
Protection Functions ....................................................................................................................20
Control/Synchronization Functions..............................................................................................20
Direction of Power..................................................................................................................................21
Power Factor Definition..........................................................................................................................21
Function .................................................................................................................................................23
Synchronizing ..............................................................................................................................23
Dead Bus Start.............................................................................................................................24
Configuration Methods...........................................................................................................................24

Manual 37105C LS 4 - Circuit Breaker Control
Page 4/92 © Woodward

CHAPTER 5. DISPLAY AND OPERATION COMPONENTS .............................................................. 25
Short Description of LED and Push Buttons ......................................................................................... 25
LEDs............................................................................................................................................ 25
Push Buttons ............................................................................................................................... 25
Miscellaneous.............................................................................................................................. 25
LEDs ...................................................................................................................................................... 26
Push Buttons ......................................................................................................................................... 27
Display ................................................................................................................................................... 28
Automatic Mode (Upper Line of the Display: Measured Values) ................................................ 28
Automatic Mode (Bottom Line of the Display: Measured Values) .............................................. 28
Automatic Mode (Bottom Line of the Display: Alarm Messages)................................................ 29
Interfaces ............................................................................................................................................... 29
Direct Configuration (DPC) ......................................................................................................... 29
CHAPTER 6. CONFIGURATION................................................................................................... 30
Basic Data ............................................................................................................................................. 31
Entering the Configuration..................................................................................................................... 32
Password..................................................................................................................................... 32
Basic Settings ........................................................................................................................................ 33
Direct Configuration..................................................................................................................... 33
Voltage Measuring ...................................................................................................................... 34
Potential Transformer Configuration ........................................................................................... 34
Current Transformer.................................................................................................................... 35
LS 4 Functions....................................................................................................................................... 36
Function....................................................................................................................................... 36
Segment Number ........................................................................................................................ 36
CAN Bus Number (Control Number)........................................................................................... 37
Data Communication via the CAN Bus ....................................................................................... 37
Priority During Breaker Closure .................................................................................................. 37
Preparation.................................................................................................................................. 38
Configuration Screens in the LS 4 .............................................................................................. 38
Configuration Screens in the GCP Control Unit.......................................................................... 41
Examples for Configuration......................................................................................................... 43
Control Functions .................................................................................................................................. 49
Synchronizing Functions ............................................................................................................. 49
Phase Angle Deviation (Phase Shift) .......................................................................................... 51
Blocking of Synchronization at Alarms........................................................................................ 52
Synchronous Networks ............................................................................................................... 53
Dead Bus Start Functions ........................................................................................................... 54
Switching Time Monitoring .......................................................................................................... 55
Monitoring Functions ............................................................................................................................. 56
Monitoring Type Configuration .................................................................................................... 56
Overvoltage Monitoring ............................................................................................................... 57
Undervoltage Monitoring ............................................................................................................. 58
Voltage Asymmetry Monitoring ................................................................................................... 59
Overfrequency Monitoring........................................................................................................... 60
Underfrequency Monitoring......................................................................................................... 61
Phase/Vector Shift Monitoring..................................................................................................... 62
df/dt (ROCOF) Monitoring ........................................................................................................... 63
Relay Configuration ............................................................................................................................... 64
Auto Acknowledgement of the Relays ........................................................................................ 64
Auto Acknowledgement of Messages ......................................................................................... 65
Changing the Relay Assignment................................................................................................. 66
Interface................................................................................................................................................. 69
General Parameters .................................................................................................................... 69
CAN Bus Parameter.................................................................................................................... 70
Change Passwords ............................................................................................................................... 71

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 5/92

CHAPTER 7. COMMISSIONING ...................................................................................................72
APPENDIX A. DIMENSIONS........................................................................................................74
APPENDIX B. TECHNICAL DATA ................................................................................................75
APPENDIX C. MEASURED QUANTITIES AND ACCURACY .............................................................77
APPENDIX D. INTERFACE..........................................................................................................78
Transmission Telegram .........................................................................................................................78
Receiving Telegram ...............................................................................................................................82
Format..........................................................................................................................................82
Example .......................................................................................................................................82
CAN Ids on the Bus................................................................................................................................83
APPENDIX E. LIST OF PARAMETERS..........................................................................................84
APPENDIX F. SERVICE OPTIONS ...............................................................................................87
Product Service Options ........................................................................................................................87
Returning Equipment For Repair ...........................................................................................................87
Packing a Control ........................................................................................................................88
Return Authorization Number RAN .............................................................................................88
Replacement Parts.................................................................................................................................88
How To Contact Woodward ...................................................................................................................89
Engineering Services .............................................................................................................................90
Technical Assistance .............................................................................................................................91

Manual 37105C LS 4 - Circuit Breaker Control
Page 6/92 © Woodward
Illustrations and Tables
Illustrations
Figure 3-1: Wiring diagram ...................................................................................................................................................... 10
Figure 3-2: Power supply.......................................................................................................................................................... 11
Figure 3-3: Measuring inputs - voltage - system [A] ................................................................................................................ 11
Figure 3-4: Measuring inputs - voltage - system [B] ................................................................................................................ 12
Figure 3-5: Measuring inputs - current - system [A]................................................................................................................. 13
Figure 3-6: Discrete inputs - positive logic............................................................................................................................... 14
Figure 3-7: Discrete input - negative logic ............................................................................................................................... 14
Figure 3-8: Relay outputs ......................................................................................................................................................... 15
Figure 3-9: Interface - terminals ............................................................................................................................................... 16
Figure 3-10: Interface - CAN bus shielding.............................................................................................................................. 16
Figure 3-11: Interfaces - CAN bus topology............................................................................................................................. 17
Figure 4-1: Direction of power ................................................................................................................................................. 21
Figure 5-1: Front panel ............................................................................................................................................................. 25
Figure 6-1: LS 4 principle......................................................................................................................................................... 37
Figure 6-2: Example A - H-Connection with two gensets per bus bar...................................................................................... 43
Figure 6-3: Example B - Double-H-connection with two gensets per bus bar.......................................................................... 44
Figure 6-4: Example C - Emergency power application with 1× generator and 1× feeder bus bar .......................................... 45
Figure 6-5: Example D - Emergency power application with 1× generator and 2× feeder bus bars......................................... 46
Figure 6-6: Example E - Multiple mains incomings to one common bus bar (no emergency power) ...................................... 47
Figure 6-7: Example F - Multiple mains/generator application ................................................................................................ 48
Figure 7-1: Dimensions............................................................................................................................................................. 74
Tables
Table 1-1: Reading LS 4 part numbers ....................................................................................................................................... 7
Table 3-1: Conversion chart - wire size ...................................................................................................................................... 9
Table 3-2: Maximum CAN bus length...................................................................................................................................... 17
Table 4-1: Permissible range for synchronization..................................................................................................................... 23
Table 5-1: Messages and alarms in the LC display................................................................................................................... 29
Table 6-1: Power reduction....................................................................................................................................................... 40
Table 6-2: Example A - H-Connection with two gensets per bus bar....................................................................................... 43
Table 6-3: Example B - Double-H-connection with two gensets per bus bar ........................................................................... 44
Table 6-4: Example C - Emergency power application with 1× generator and 1× feeder bus bar............................................ 45
Table 6-5: Example D - Emergency power application with 1× generator and 2× feeder bus bars.......................................... 46
Table 6-6: Example E - Multiple mains incomings to one common bus bar (no emergency power) ....................................... 47
Table 6-7: Example F - Multiple mains/generator application ................................................................................................. 48
Table 6-8: Calculation of the phase angle deviation................................................................................................................. 51
Table 6-9: Auto-acknowledgment of the relay messages ......................................................................................................... 65
Table 6-10: Relay manager....................................................................................................................................................... 67

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 7/92
Chapter 1.
General Information
The LS 4 is an intelligent synchronizer and protection device capable of measuring voltage and current though
integrated measuring inputs. It can calculate set point values using internal software routines (i.e. for synchroni-
zation) and can transfer these set point values to a lower level GCP control unit using the integrated CAN bus
(Guidance Level). The LS 4 is also capable of closing the connected breaker at the synchronous point. Addition-
ally the measured/calculated values may be monitored for exceeding/falling below a predefined set point result-
ing in an automatic opening of the connected circuit breaker.
The detailed model description for the LS 4 reads as follows:
LS415B
Mounting
[B]=Flush-mounting
Current transformer, secondary
[1] = ../1 A
[5] = ../5 A
Voltage transformer, secondary
[1] = 100 Vac
[4] = 400 Vac
Type
Table 1-1: Reading LS 4 part numbers
Example:
LS 415B (flush mounted, standard unit with 100 Vac PT and ../5 A CT inputs)
Intended Use: This control must only be operated for the uses described in this manual. The prerequisite for a
proper and safe operation of the product is correct transportation, storage, and installation as well as careful op-
eration and maintenance.
NOTE
This manual has been developed for an item fitted with all available options. Inputs/outputs, functions,
configuration screens and other details described which do not exist on your item may be ignored.
The present manual has been prepared to enable the installation and commissioning of the item. Due
to the large variety of parameter settings it is not possible to cover every possible combination. This
manual is therefore only a guide. In case of incorrect entries or a total loss of functions, the default set-
tings can be taken from the enclosed list of parameters.

Manual 37105C LS 4 - Circuit Breaker Control
Page 8/92 © Woodward
Chapter 2.
Electrostatic Discharge Awareness
All electronic equipment is static-sensitive, some components more than others. To protect these components
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 materials.
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 packages, cello-
phane 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 necessary. 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 cabinet, 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.

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 9/92
Chapter 3.
Installation
CAUTION
A circuit breaker must be located near to the unit and in a position easily accessible to the operator.
This must also bear a sign identifying it as an isolating switch for the unit.
NOTE
Inductive devices connected to the system (such as operating current coils, undervoltage tripping
units, or auxiliary/power contacts) must be connected to a suitable interference suppressor.
The following chart may be used to convert square millimeters [mm²] to AWG and vice versa:
AWG mm² AWG mm² AWG mm² AWG mm² AWG mm² AWG mm²
30 0.05 21 0.38 14 2.5 4 25 3/0 95 600MCM 300
28 0.08 20 0.5 12 4 2 35 4/0 120 750MCM 400
26 0.14 18 0.75 10 6 1 50 300MCM 150 1000MCM 500
24 0.25 17 1.0 8 10 1/0 55 350MCM 185
22 0.34 16 1.5 6 16 2/0 70 500MCM 240
Table 3-1: Conversion chart - wire size

Manual 37105C LS 4 - Circuit Breaker Control
Page 10/92 © Woodward
Wiring Diagram
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Subject to technical modifications.
3/(4) 3/(4)
Relay 2
Relay 1
Relay 3
2005-11-23 | LS 4 Wiring Diagram ls4ww-4705-ap.skf
The socket for the PC configuration is located
on the side of the unit. This is where the direct
configuration cable DPC must be plugged in.
System [B]
LS 4 (Circuit Breaker Control)
Disconnector
e.g. PLC
Interface
CAN bus
(Guidance Level)
CAN-L
CAN-H
GND
CAN-L
CAN-H
3/(4)
System
[A]
Relay 4
Relay 5
Relay 6
Relay 8
Synchronization
(impulse relay)
CAN-L
CAN-H
GND
CAN-L
CAN-H
LS 4.17
CAN-L
CAN-H
GND
CAN-L
CAN-H
LS 4.19
CAN-L
CAN-H
GND
CAN-L
CAN-H
LS 4.x
GCP-31.xGCP-31.1GW 4
CAN-L
CAN-H
GND
CAN-L
CAN-H
CAN-L
CAN-H
GND
CAN-L
CAN-H
CAN-L
CAN-H
GND
CAN-L
CAN-H
R R
X5X4X3X2X129
Relay 7
28272625242322212019161514131211109
CAN-L
CAN-H
GND
CAN-L
CAN-H
LS 4.18
GCP-31.2
CAN-L
CAN-H
GND
CAN-L
CAN-H
4445737475 3031327071725678 43 42 41 40 4 3 2 1
Voltage - System [B] - L3
Voltage - System [B] - L2
Voltage - System [B] - L1
Blocking of watchdog funct. /
remote acknowledgment
0 Vdc
Common
Enable CB
Reply: CB is open
Common
Reply: Isolation switch is open
Command: open CB
Current - System [A] - L1
s2/x2 (l)
Current - System [A] - L2
Current - System [A] - L3
s1/x1 (k)
(Voltage - System [A] - N)
Voltage - System [A] - L1
Voltage - System [A] - L2
Voltage - System [A] - L3
Measuring
voltage
three-wire or
four-wire system
Battery or another power supply Terminal 30/73 is pos. or neg. signal
#
CB
3/(4)
S1/X1 (K)
S2/X2 (L) s2/x2 (l)
s1/x1 (k) L1
3
#
24 Vdc
S1/X1 (K)
S2/X2 (L) s2/x2 (l)
s1/x1 (k) L2
S1/X1 (K)
S2/X2 (L) s2/x2 (l)
s1/x1 (k) L3
s1/x1 (k)
s2/x2 (l)
s1/x1 (k)
s2/x2 (l)
Figure 3-1: Wiring diagram

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 11/92
Power Supply
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
18 to 30 Vdc
7 8
0 V
18 to 30 Vdc
Power supply
Figure 3-2: Power supply
Terminal Description Amax
Standard
8 18 to 30 Vdc, max. 10 W 2.5 mm²
7 0 Vdc reference point 2.5 mm²
Measuring Inputs
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Voltage - System [A]
Voltage
- System [A]
1234
L3
L2
L1
N
L3
L2
L1
N
CB
Isolation
switch
System [A] System [B]
Figure 3-3: Measuring inputs - voltage - system [A]
Terminal Measuring Description Amax
1 400 Vac
direct or via
100 Vac
transformer
Voltage - system [A] - L1 2.5 mm²
2 Voltage - system [A] - L2 2.5 mm²
3 Voltage - system [A] - L3 2.5 mm²
4 Neutral point of the 3-phase system/transformer 2.5 mm²

Manual 37105C LS 4 - Circuit Breaker Control
Page 12/92 © Woodward
Voltage - System [B]
L3
L2
L1
N
L3
L2
L1
Voltage
- System [B]
CB
70 71 72
System [A] System [B]
Isolation
switch
Figure 3-4: Measuring inputs - voltage - system [B]
Terminal Measuring Description Amax
70 400 Vac
direct or via
100 Vac
transformer
Voltage - system [B] - L1 2.5 mm²
71 Voltage - system [B] - L2 2.5 mm²
72 Voltage - system [B] - L3 2.5 mm²

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 13/92
Current - System [A]
CAUTION
Before disconnecting the secondary current transformer connections or the connections of the current
transformer at the device, ensure that the current transformer is short-circuited.
NOTE
Grounding of the secondary of a current transformer must always be single-sided.
Detail:
Connection of the transducers
S1/X1 S2/X2
s1/x1
System [A]
s2/x2
L2
s2/x2 (l)
s1/x1 (k)
43 4544
L3
L3
L2
L1
N
System [B]
s2/x2 (l)
Current
- System [A]
../1 A
or
../5 A
s1/x1 (k)
s2/x2 (l)
.. ..
L..
424140
L1
CB
Isolation
switch
System [B]
s1/x1 (k)
s2/x2 (l)
s1/x1 (k)
Figure 3-5: Measuring inputs - current - system [A]
Terminal Measuring Description Amax
40
Transformer
../1 A
or
../5 A
Current - System [A] - L1, transformer term. s1/x1 (k) 4.0 mm²
41 Current - System [A] - L1, transformer term. s2/x2 (l) 4.0 mm²
42 Current - System [A] - L2, transformer term. s1/x1 (k) 4.0 mm²
43 Current - System [A] - L2, transformer term. s2/x2 (l) 4.0 mm²
44 Current - System [A] - L3, transformer term. s1/x1 (k) 4.0 mm²
45 Current - System [A] - L3, transformer term. s2/x2 (l) 4.0 mm²

Manual 37105C LS 4 - Circuit Breaker Control
Page 14/92 © Woodward
Discrete Inputs
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
CAUTION
Please note that the maximum voltages, which may be applied at the discrete inputs, are defined as fol-
lows. Voltages higher than those specified will destroy the hardware!
•Maximum input range: +/-18 to 250 Vac.
The discrete inputs may be either connected in a positive or a negative logic circuit:
•positive logic The discrete input is connected with +/-18 to 250 Vac.
•negative logic The discrete input is connected with GND.
Positive Logic
+/-18-250 Vac/dc
Signal device
Discrete input
AB
Figure 3-6: Discrete inputs - positive logic
Terminal Associated
common
Description
(according to DIN 40 719, part 3, 5.8.3)
Amax
A B
5 6
Blocking of protective functions / remote acknowledg-
ment 2.5 mm²
31 30 Enable CB 2.5 mm²
32 Reply: CB is open 2.5 mm²
74 73 Reply: Isolation switch is open 2.5 mm²
75 Command: open CB 2.5 mm²
Negative Logic
Discrete input
AB
Signal device
+/-18-250 Vac/dc
Figure 3-7: Discrete input - negative logic
Associated
common
Terminal Description
(according to DIN 40 719, part 3, 5.8.3)
Amax
A B
6 5
Blocking of protective functions / remote acknowledg-
ment 2.5 mm²
30 31 Enable CB 2.5 mm²
32 Reply: CB is open 2.5 mm²
73 74 Reply: Isolation switch is open 2.5 mm²
75 Command: open CB 2.5 mm²

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 15/92
Relay Outputs
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
CAUTION
The function "Command: open CB" must be assigned to one of the freely configurable relays using the
relay manager (see Parameter 98).
AB
Relay output
Relay output
external device
external device
external device
CDE
max. 250 Vac
Figure 3-8: Relay outputs
Description Amax
Make contact
Root Switched
A B [NO]
9 10 Relay 1 (ready for operation; NC) 2.5 mm²
19 20 Relay 4 2.5 mm²
21 22 Relay 5 2.5 mm²
23 24 Relay 6 2.5 mm²
25 26 Relay 7 2.5 mm²
Change-over contact
Swtchd Root Opened
C [NO] D E [NC]
11 12 13 Relay 2 2.5 mm²
14 15 16 Relay 3 2.5 mm²
27 28 29 Synchronization (pulse relays) 2.5 mm²

Manual 37105C LS 4 - Circuit Breaker Control
Page 16/92 © Woodward
Interface
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Interface Connection
CA B D E
Interface CAN bus
GND
CAN-H
CAN-L
CAN-H
CAN-L
Figure 3-9: Interface - terminals
Terminal Description
A (X1) B (X2) C (X3) D (X4) E (X5)
[1] [1] GND CAN-H CAN-L CAN bus
[1] may be used to loop CAN bus and/or to connect termination resistance.
CAN Bus Shielding
Interface
CAN bus
CAN-L
CAN-H
GND
Shield
1 M Ohm
0.01 µ F
400 Vac
Figure 3-10: Interface - CAN bus shielding

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 17/92
CAN Bus Topology
NOTE
Please note that the CAN bus must be terminated with an impedance which corresponds to the wave
impedance of the cable (e.g. 120 Ω). The CAN bus is terminated between CAN-H and CAN-L.
GND
CAN-L
CAN-H
GND GND
CAN-L
CAN-H
CAN-L
CAN-H
CAN-L
CAN-H
CAN bus
Termination
Termination
resistor
Note:
The termination has to be
performed with a resisitance,
which corresponds to the
impedance of the used cable
(e.g 120 Ohms)
CAN bus CAN bus
Termination
Termination
resistor
Figure 3-11: Interfaces - CAN bus topology
Possible CAN Bus Problems
If no data is transmitted on the CAN bus, check the following for common CAN bus communication problems:
-T structure bus is utilized (stub-end feeders or branch lines are not recommended)
-CAN-L and CAN-H are interchanged
-Not all devices on the bus are using identical Baud rates
-Terminating resistor(s) is/are missing
-Incorrect baud rate (too high) for length of CAN bus
Maximum CAN Bus Length
The maximum length of the communication bus wiring is dependent on the configured Baud rate. Refer to Table
3-2 for the maximum bus length (Source: CANopen; Holger Zeltwanger (Hrsg.); 2001 VDE VERLAG GMBH,
Berlin und Offenbach; ISBN 3-8007-2448-0).
Baud rate Max. length
1000 kbit/s 25 m
800 kbit/s 50 m
500 kbit/s 100 m
125 kbit/s 250 m
50 kbits/s 1000 m
20 kbit/s 2500 m
Table 3-2: Maximum CAN bus length
The maximum specified length for the communication bus wiring might not be achieved if poor quality wire is
utilized, there is high contact resistance, or other conditions exist. Reducing the baud rate may overcome these is-
sues.

Manual 37105C LS 4 - Circuit Breaker Control
Page 18/92 © Woodward
DPC - Direct Configuration Interface
NOTE
To configure via the configuration interface (direct configuration), you need the configuration cable
(part number 5417-557), the program LeoPC1 (delivered with the cable), and the corresponding confi-
guration files. Please consult the online help installed when the program is installed for a description
of the LeoPC1 program and its setup.
If Parameter 5 "Direct para" is enabled on the control, communication via the CAN bus interface on
terminals X1/X5 is disabled.

Manual 37105C LS 4 - Circuit Breaker Control
© Woodward Page 19/92
Chapter 4.
Functional Description
Introduction
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Measuring Values
•Voltage
Three-phase measurement of the rms values of the phase-to-neutral and phase-to-phase voltages of two sys-
tems (system [A] and [B]; system [B] only phase-to-phase). This unit can be delivered with the following
measuring voltage ranges (rated values). Selection of type during ordering (see page 75 "Technical Data"):
- 66/115 Vac
- 230/400 Vac
•Frequency
Time measurement from the digitally filtered measuring voltages. The measurement of the frequency is three-
phased if all voltages are greater than 15 % of the rated value (100 Vac or 400 Vac). This guarantees a fast
and precise measurement of the frequency. However the frequency is still measured correctly even if voltage
is only applied to one phase.
•Current
Three-phase rms values.
•Real power
Single-phase measuring calculated from apparent power and power factor cosphi (power factor).
•Re-active power
Single-phase measurement calculated from apparent power and power factor sinphi.
•Power factor cosphi
Time measurement between the filtered measuring values of the voltage VL12 and the conductor current IL1.
General Functions
•1 freely configurable relay output (NO) as ready for operation relay
•4 freely configurable relay outputs (NO)
•2 freely configurable relay outputs (change-over)
•1 relay output (change-over) for synchronization (pulse relay)
•Discrete input for alarm blocking or acknowledgment
•Password system
•CAN bus interface
•4 discrete control inputs

Manual 37105C LS 4 - Circuit Breaker Control
Page 20/92 © Woodward
Protection Functions
CAUTION
The function "Command: open CB" must be assigned to one of the freely configurable relays using the
relay manager (see Parameter 98).
Function Monitoring System monitored
•Three-phase over-/undervoltage (2 levels) V>/V< only system [A]
•Over-/underfrequency f>/f< only system [A]
•Voltage asymmetry Vas> only system [A]
•dϕ/dt phase/vector jump dϕ/dt only system [A]
•df/dt (ROCOF) df/dt only system [A]
Control/Synchronization Functions
•Transmission of set point values via CAN bus to a lower level control unit (i.e. GCP-31) for synchronization
of one circuit breaker with voltage and frequency adjustment
•Transmission of actual values via the CAN bus to a control unit (i.e. GCP-31) for real power control
•Closing of the CB onto a dead (de-energized) bus bar