Basler DECS-100 User manual

INSTRUCTION MANUAL
FOR
DIGITAL EXCITATION CONTROL SYSTEM
DECS-100
Publication: 9287500991
Revision: K 05/11

9287500991 Rev K DECS-100 Introduction i
INTRODUCTION
This instruction manual provides information about the operation and installation of the DECS-100 Digital
Excitation Control System. To accomplish this, the following information is provided:
 General Information and Specifications
 Controls and Indicators
 Functio nal Description
 Ins tallation
 Maintenance and Troubleshooting
WARNING!
To avoid person al injury o r equipment damage, only qualified person nel should
perform the procedures in this manual.
Lethal voltage is present at the rear panel when the unit is energized. Rear panel
connections should be made only when the unit id de-energized.
NOTE
Be sure that the DECS-100 is hard-wired to earth ground with no smaller than 12
AWG copper wire atta ched to the grou nd terminal o n the rea r of the unit ca se.
When the DECS-10 0 is configu red in a system with other device s, it is
recommended to use a separate lead to the ground bus from each unit.
CAUTION
The Man ual mode excit ation level must be eva luated pri or to enabling t his
feature. If the level of excitation cu rrent is inappropriate for the generator, severe
damage to the generator may occur.
Improper PID numbers will result in poor system performance or system damage.
When ap plying ope rating power for programming purposes, o bserve th e pre-
cautions called out in Section 4, Installation, Preliminary Setup.
When p rogramming th e DECS -100 wit hout th e gen erator spin ning, t he
connections to DECS-100 terminals F+ and F– should be removed.
Before uploading a settings file, remove ope rating power f rom t he DECS-100,
disconnect the field wirin g from termin als F+ a nd F–, and re -apply operatin g
power to the DECS-100.

ii DECS-100 Introduction 9287500991 Rev K
First Printing: March 2001
Printed in USA
© 2011 Basler Electric, Highland Illinois 62249 USA
All Rights Reserved
May 2011
It is not the intention of this manual to cover all details and variations in equipment, nor does this manual
provide data for every possible contingency regarding installation or operation. The availability and design
of all feature s and o ptions are su bject to modifica tion without notice. Shoul d further info rmation b e
required, contact Basler Electric.
BASLER ELECTRIC
12570 STATE ROUTE 143
HIGHLAND IL 62249 USA
http://www.basler.com, [email protected]
PHONE [phone] FAX [phone]
CONFIDENTIAL INFORMATION
of Basler Electric, Highland Illinois, USA. It is loaned for confidential use, subject
to return on request, and with the mutual understanding that it will not be used in
any manner detrimental to the interest of Basler Electric.

9287500991 Rev K DECS-100 Introduction iii
REVISION HISTORY
The following information provides a historical summary of the changes made to the DECS-100
hardware, firmware, and software. The corresponding revisions made to this instruction manual
(9287500991) are also summarized. Revisions are listed in chronological order.
Hardware
Version and Date
Change
E, 01/01
•
Initial release
F, 05/01 •
Deepened potting shell
G, 10/01
•
Began supplying mounting screws
H, 02/02
•SIL-PADS were added between power components and the heat sinks
•
Added manufacturing origin to the rear label
J, 07/02
•Revised EEPROM
K, 02/03
•
Replaced transistor Q8B1 with an improved part
L, 03/03
•
Incremental improvements to firmware and BESTCOMS
M, 01/04
•Improved flash memory retention
N, 05/05
•Redesigned current transformer
•Added front panel Underexcitation Limiting indicator
•
Enhanced EMI/RFI immunity
O
•
Version letter O not used
P, 08/06
•Updated CD-ROM supplied with unit to include English and French
language instruction manuals
Q
•
Version letter Q not used
R, 04/07
•
Resolved UEL issue with firmware modification
S, 05/07 •
Provided German language manual on CD-ROM supplied with DECS-100
T, 07/07
•
Released firmware version 2.13.XX
U, 01/08
•
Improved power amplifier circuitry with more robust components
V, 03/08 •
Added Setpoint Auto Save feature
W, 03/09
•
Released BESTCOMS version 1.08.XX.
X, 02/10
•
Added enhancement for production testing.
Firmware
Version and Date
Change
1.09.XX, 01/01
•
Initial release
1.11.XX, 07/01
•Enabled the protection function during the first 5 seconds of operation
•Modified the OEL setpoint scale factor to be compatible with BESTCOMS
version 1.03.XX
•Added the scale factor for per-unit gain
•
Established minimum voltage regulation at 30% of nominal sensing voltage
1.12.XX, 03/02 •
Added register to detect CT type
2.13.XX, 07/07
•Added underexcitation limiting
•Added takeover-style excitation limiting
•
Added bus voltage matching provisions
2.14.XX, 03/08
•
Added Setpoint Auto Save setting
BESTCOMS for
Windows®OS
Version and Date
Change
1.02.XX, 02/01
•
Initial Release
1.03.XX, 08/01 •Changed OEL scale from 100 to 1,000 to match the change in firmware
version 1.11.01
•Changed OEL default setting from 1 to 15
•Changed the default for all protection functions to enabled
•
Add support for French regional settings
1.04.XX, 04/02
•
Made BESTCOMS compatible with older firmware versions

iv DECS-100 Introduction 9287500991 Rev K
BESTCOMS for
Windows®OS
Version and Date
Change
•Added support for all regional settings
•Enabled reading of secondary CT value for units with firmware version
1.12.01 and higher
•Simplified the Analysis screen
•Added feature to calculate and send voltage matching reference for
different generator and bus PT ratios
•
Changed minimum Ki setpoint from 0 to 0.01
1.05.XX, 05/05
•Added underexcitation limiting capability
•Added ability to select either summing point or takeover style OEL
•
Added provisions for bus voltage matching
1.06.XX, 11/07
•
Added compatibility with Microsoft® Vista to BESTCOMS
1.07.XX, 03/08
•
Added Setpoint Auto Save setting.
1.08.XX, 03/09
•
Improved communications with DECS-100.
1.09.XX, 01/11
•Added Windows® 7 compatibility and improved field overvoltage
shutdown.
BESTCOMS for
Palm®OS
Version and Date
Change
1.01.XX, 01/01
•
Initial Release
1.02.XX, 08/01
•Added a Check for New Version button to the Contact Basler screen
•Added a date/time stamp to the “Save to File” names
•
Added version checking
1.03.XX, 04/02
•Added password protection
•
Improved version checking function
NOTE
•BESTCOMS for Palm OS is compatible only with firmware versions
1.12.XX and earlier
Manual
Revision and Date
Change
—, 03/01
•
Initial release
A, 03/01
•In Section 5, BESTCOMS Software for the Windows® Operating System
and Section 6,
BESTCOMS Software for the Palm OS® Platform , Step 2 of
Installing BESTCOMS was revised to reflect the addition of an auto-start
utility for the DECS-100 CD-ROM
B, 08/01
•Added Embedded Software subsection to Section 5, BESTCOMS Software
for the Windows® Operating System
•
Corrected various minor errors throughout manual
C, 05/02 •Revised the torque specification for the mounting screws supplied with unit
•In Section 5, BESTCOMS Software for the Windows® Operating System
and Section 6,
BESTCOMS Software for the Palm® OS Platform , text and
illustrations were revised to accommodate software enhancements
D, 01/03 •Revised Voltage Matching Time Adjustment Range from 0 to 300 seconds
to 1 to 300 seconds throughout manual
•
Corrected figure number references in Sections 5 and 6
E, 03/04
•Added Operating Power Considerations During DECS-100 Programming to
Section 4, Installation, Preliminary Setup
•Added caution box regarding application of operating power during DECS-
100 programming to Section 5,
BESTCOMS for Windows® OS and
Section 6,
BESTCOMS for Palm OS®
•
Corrected CT ratio setting range stated in Section 5

9287500991 Rev K DECS-100 Introduction v
Manual
Revision and Date
Change
F, 05/05
•Added material covering added UEL capability
•Revised all drawings to show new front panel with UEL indicator
•Updated all illustrations of rear panel to show revised CT
•Added discussion of summing point and takeover style OEL limiting
•Revised voltage matching description to cover Maintain and Revert modes
•Corrected the hole drilling diameter shown in Figure 4-2
•Added illustration/description for using the ICRM-7 with the DECS-100
•Removed Section 6,
BESTCOMS Software for the Palm® OS Platform and
moved
Maintenance and Troubleshooting to Section 6
•
Added troubleshooting procedure for a UEL annunciation
G, 03/07
•Corrected illustration and descriptions of BESTCOMS Metering, Operation
and Alarms screen, Operation tab
•
Removed expired patent information
H, 05/08
•Added DNV compliance statement to manual specifications
•
Added description of BESTCOMS Setpoint Auto Save feature
J, 10/08
•Revised the setting ranges of control gain settings OEL KI, OEL Kg,
UEL KI, and UEL Kg from 0–1,000 to 0–300 to reflect changes made in
BESTCOMS version 1.07.01.
K, 05/11 •Revised
Introduction to reflect new epoxy-potted package.
•Removed “(optional feature)” from note 5 of Figures 4-7 to 4-10, due to the
setpoint option now being standard.
•Added storage / electrolytic capacitors procedure to Section 6.
•
Corrected various minor errors throughout manual

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9287500991 Rev K DECS-100 Introduction vii
CONTENTS
A detailed table of contents is provided at the start of each manual section. The manual sections are
ordered as follows.
Section 1 General Information .................................................................................................. 1-1
Section 2 Human-Machine Interface......................................................................................... 2-1
Section 3 Functional Description .............................................................................................. 3-1
Section 4 Installation ................................................................................................................. 4-1
Section 5 BESTCOMS Software............................................................................................... 5-1
Section 6 Maintenance and Troubleshooting............................................................................ 6-1

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9287500991 Rev K DECS-100 General Information i
SECTION 1 •GENERAL INFORMATION
TABLE OF CONTENTS
SECTION 1 •GENERAL INFORMATION ................................................................................................ 1-1
INTRODUCTION.................................................................................................................................... 1-1
FEATURES ............................................................................................................................................ 1-1
MODEL AND STYLE NUMBER............................................................................................................. 1-1
Style Number...................................................................................................................................... 1-1
SPECIFICATIONS ................................................................................................................................. 1-2
Operating Power ................................................................................................................................ 1-2
Generator Voltage Sensing ................................................................................................................ 1-2
Generator Current Sensing ................................................................................................................ 1-2
Bus Voltage Sensing (Optional) ......................................................................................................... 1-2
Accessory Input.................................................................................................................................. 1-3
Communication Port........................................................................................................................... 1-3
Contact Input Circuits ......................................................................................................................... 1-3
Common Alarm Output....................................................................................................................... 1-3
Field Output ........................................................................................................................................ 1-3
AVR Operating Mode ......................................................................................................................... 1-3
FCR (Manual) Operating Mode .......................................................................................................... 1-4
Var Operating Mode (Optional) .......................................................................................................... 1-4
PF Operating Mode (Optional) ........................................................................................................... 1-4
Parallel Compensation ....................................................................................................................... 1-4
Field Overvoltage Protection .............................................................................................................. 1-4
Generator Overvoltage Protection ..................................................................................................... 1-4
Overexcitation Limiter......................................................................................................................... 1-5
Underexcitation Limiter....................................................................................................................... 1-5
Soft Start Function (AVR Mode Only) ................................................................................................ 1-5
Voltage Matching................................................................................................................................ 1-5
Metering (BESTCOMS)...................................................................................................................... 1-5
Environment ....................................................................................................................................... 1-6
Type Tests.......................................................................................................................................... 1-6
Physical .............................................................................................................................................. 1-6
Agency Recognition ........................................................................................................................... 1-6
CE Compliance .................................................................................................................................. 1-6
Figures
Figure 1-1. DECS-100 Style Chart ............................................................................................................ 1-1
Figure 1-2. Typical V/Hz Curves................................................................................................................ 1-4

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9287500991 Rev K DECS-100 General Information 1-1
SECTION 1 •GENERAL INFORMATION
INTRODUCTION
The Basler Digital Excitation Control System (DECS-100) is an electronic, solid-state, microprocessor
based control device. The DECS-100 regulates the output voltage of a brushless, ac generator by
controlling the current into the generator exciter field. Input power to the DECS-100 can be from a multi-
pole, high-frequency, permanent magnet generator (PMG) or from the generator output when used as a
conventional, shunt-excited, excitation system.
The DECS-100 is supplied in an epoxy-potted package designed for behind-the-panel mounting. The
DECS-100 is held in place by thread-forming screws that thread into its plastic shell. Front panel
indicators (LEDs) annunciate DECS-100 status and system conditions. DECS-100 connections are made
through quarter-inch, quick-connect terminals on the rear panel. A 9-pin DB-9 type connector on the rear
panel provides communication between the DECS-100 and an IBM compatible PC.
FEATURES
DECS-100 units have the following features and capabilities:
•Four control modes: automatic voltage regulation (AVR), manual or field current regulation (FCR),
power factor (PF) regulation, and reactive power (var) regulation.
•Programmable stability settings.
•Soft start and voltage buildup control with an adjustable ramp in AVR control mode.
•Overexcitation limiting (OEL) and underexcitation limiting (UEL) in AVR, Var, and PF control modes.
•Underfrequency (volts/hertz) regulation.
•Three-phase or single-phase generator voltage (rms) sensing/regulation in AVR mode.
•Single-phase bus voltage (rms) sensing.
•Single-phase generator current sensing for metering and regulation purposes.
•Field current and field voltage sensing.
•One analog input for proportional remote control of the setpoint.
•Five contact sensing inputs for system interface.
•One common output relay for alarm indication and trip functions.
•Three protection functions: field overvoltage, generator overvoltage, and loss of sensing.
•Generator paralleling with reactive droop compensation and reactive differential compensation.
•Rear RS-232 communication port for personal computer communication using BESTCOMS
Windows® based software for fast, user-friendly, setup and control.
MODEL AND STYLE NUMBER
The model number, together with the style number, describe the options included in a specific device, and
appear on a label affixed to the rear panel. Upon receipt of a DECS-100, be sure to check the style
number against the requisition and the packing list to ensure that they agree.
Style Number
DECS-100 electrical characteristics and operational features are defined by a combination of letters and
numbers that make up the style number. The DECS-100 style number chart is shown in Figure 1-1.
Figure 1-1. DECS-100 Style Chart

1-2 DECS-100 General Information 9287500991 Rev K
For example, a DECS-100 with a style number of A15 would have the following characteristics and
operating features.
Style Number Example
A ------- No var or power factor control
1-------- Voltage matching
5-------- 5 ampere current sensing
SPECIFICATIONS
DECS-100 specifications and qualifications are listed in the following paragraphs.
Operating Power
Refer to Section 4, Installation for special requirements concerning the application of operating power
during DECS-100 programming and the application of station power.
Voltage: 88 to 250 Vac, single-phase or three-phase (L-L)
Frequency: 50 to 400 Hz
Burden: 650 VA
Voltage Buildup: ≥6 Vac
Terminals: 3, 4, 5
Generator Voltage Sensing
Type: 1-Phase/3-Phase, 4 ranges
Burden: <1 VA per phase
Terminals: E1, E2, E3
Range 1: 100 Vac (85 to 132 Vac)
50 Hertz Sensing
Range 2: 200 Vac (190 to 220 Vac)
Range 3: 400 Vac (380 to 440 Vac)
Range 4: N/A
Range 1: 120 Vac (85 to 132 Vac)
60 Hertz Sensing
Range 2: 240 Vac (170 to 264 Vac)
Range 3: 480 Vac (340 to 528 Vac)
Range 4: 600 Vac (540 to 660 Vac)
Generator Current Sensing
Type: 1-phase (B-phase), 50/60 Hz
Style XX1: 1 Aac maximum continuous
Style XX5: 5 Aac maximum continuous
Burden: <0.1 VA
Terminals: CT1, CT2
Bus Voltage Sensing (Optional)
Type: 1-phase, 4 ranges
Burden: <1 VA per phase
Terminals: B1, B3
Range 1: 100 Vac (85 to 132 Vac)
50 Hertz Sensing
Range 2: 200 Vac (190 to 220 Vac)
Range 3: 400 Vac (380 to 440 Vac)
Range 4: N/A
Range 1: 120 Vac (85 to 132 Vac)
60 Hertz Sensing
Range 2: 240 Vac (170 to 264 Vac)
Range 3: 480 Vac (340 to 528 Vac)
Range 4: 600 Vac (540 to 660 Vac)

9287500991 Rev K DECS-100 General Information 1-3
Accessory Input
Voltage Range: –3 Vdc to +3 Vdc
Setpoint Range: –30% to +30% shift
Burden: 1 kΩ
Terminals: A, B
Communication Port
Interface: Full duplex RS-232
Connection: Rear panel DB-9 connector
Baud: 4800
Data Bits: 8
Parity: None
Stop Bit: 1
Contact Input Circuits
Type: Dry contacts
Interrogation Voltage: 13 Vdc (supplied by DECS-100)
Raise: 6U, 7
Terminal Assignments for Standard Functions
Lower: 6D, 7
Var/PF Enable: 52J, 52K
Parallel Control: 52L, 52M
Voltage Matching: VM, VMC
Common Alarm Output
Type: Form A
Rated Load: 7 Aac/Adc continuous
Make: 30 Aac/Adc, carry for 0.2 sec
Break: 7 Aac/0.1 Adc
Operating Voltage: 240 Vac/250 Vdc maximum
Terminals: AL1, AL2
Field Output
Continuous Rating: 63 Vdc, 7 Adc
Field Resistance: 9 Ωminimum
Terminals: F+, F–
200 Vac Power Input: 135 Vdc, 15 Adc
10 Second Forcing Rating
110 Vac Power Input: 90 Vdc, 10 Adc (9Ωfield)
75 Vdc, 15 Adc (5Ωfield)
AVR Operating Mode
Adjustment Range: See Generator Voltage Sensing
Voltage Regulation: ±0.25% over load range at rated power factor and constant generator
frequency.
±0.5% with 3-phase sensing and shunt power at 40% THD of the voltage
waveform (due to a six SCR load).
Temperature Drift: ±0.5% for a 40°C change
V/Hz Characteristic: Slope from 0 to 3PU is adjustable in 0.01PU increments. Transition
(Corner) frequency is adjustable from 40 to 65 Hz. See Figure 1-2 for the
V/Hz curves.
Response Time: Within 1 cycle

1-4 DECS-100 General Information 9287500991 Rev K
Figure 1-2. Typical V/Hz Curves
FCR (Manual) Operating Mode
Adjustment Range: 0 to 7 Adc
Increment: 0.01 Adc
Var Operating Mode (Optional)
Adjustment Range: –100 to 100%
Increment: 0.1%
PF Operating Mode (Optional)
Adjustment Range: 0.6 lag to 0.6 lead
Increment: 0.001
Parallel Compensation
Modes: Reactive Droop and Reactive Differential (cross-current)∗
Droop Adjust Range: 0 to 10%
Increment: 1%
∗Burden can exceed 1 VA if external resistors are added to the CT circuit.
Field Overvoltage Protection
Pickup Range: 0 to 250 Vdc
Time Delay: 10 s (fixed)
Generator Overvoltage Protection
Range: 100 to 120% of system voltage setting
Pickup
Increment: 1.0%
Range: 0 to 10 s
Alarm Time Delay
Increment: 1 s

9287500991 Rev K DECS-100 General Information 1-5
Overexcitation Limiter
Range: 0 to 15 Adc
Pickup
Increment: 0.001 Adc
Range: 0 to 10 s
Alarm Time Delay
Increment: 1 s
Underexcitation Limiter
Range: 0 to 100% of rated vars
Pickup
Increment: 1%
Range: 0 to 10 s
Alarm Time Delay
Increment: 1 s
Soft Start Function (AVR Mode Only)
Time Adjust Range: 1 to 7,200 s
Increment: 1 s
Voltage Matching
Accuracy: Generator rms voltage is matched with the bus rms voltage to within
±0.5% of the generator voltage.
Range: 1 to 300 s
Time Adjustment
Increment: 0.01 s
Metering (BESTCOMS)
Range: 10 V to 79 kV
Generator Voltage
Accuracy: ±0.5% (at 25°C)
Range: 0.04 to 3,000 Aac for 1 A CT (Not to exceed nominal CT rating)
Generator Current
0.2 to 15,000 Aac for5 A CT (Not to exceed nominal CT rating)
Accuracy: ±0.5% (at 25°C)
Range: 40 to 65 Hz
Frequency
Accuracy: ±0.2 Hz (at 25°C)
Range: 0 to 200 Vdc
Field Voltage
Accuracy: ±5.0% (at 25°C)
Range: 0 to 20 A
Field Current
Accuracy: ±0.5% (at 25°C)
Range: 10 V to 79 kV
Bus Voltage
Accuracy: ±0.5% (at 25°C)
Range: –3 V to +3 V
Auxiliary DC Input
Accuracy: ±0.5% (at 25°C)

1-6 DECS-100 General Information 9287500991 Rev K
Range: 0 to 99 MVA, MW, Mvar
Power (Apparent, Real, and Reactive)
Accuracy: ±3.0% (at 25°C)
Range: –1.0 to –0.6, +0.6 to +1.0
Power Factor
Accuracy: ±0.02 at rated current (25°C), CT input ≥10% nominal rating
Range: 0 to 360 degrees
Phase Angle
Accuracy: ±2.0 degrees (at 25°C), CT input ≥10% nominal rating
Environment
DECS-100: –40 to 70°C (–40 to 158°F)
Operating Temperature
DECS-100: –40 to 85°C (–40 to 185°F)
Storage Temperature
CD-ROM: 0 to 50°C (32 to 122°F)
Type Tests
Shock: Withstands 20 G in three perpendicular planes
Vibration: Withstands 1.2 G at 5 to 26 Hz
Withstands 0.914 mm (0.036 in) double amplitude at 27 to 52 Hz
Withstands 5 G at 53 to 500 Hz
Salt Fog: Qualified per MIL-STD-810E
Physical
Unit: 1.10 kg (2.42 lb)
Weight
Shipping: 1.31 kg (2.88 lb)
Single Unit: 299 x 79 x 146 mm (11.75 x 3.125 x 5.75 in)
Shipping Carton Dimensions (W x H x D)
48 Units: 841 x 653 x 352 mm (33.13 x 25.69 x 13.88 in)
Agency Recognition
cURus recognition per UL Standard 508 and CSA Standard C22.2 No. 14
Complies with Det Norske Veritas Standard for Certification 2.4
CE Compliance
Emissions: CISPR11/EN55011, Level A
Electrostatic Discharge (ESD): IEC 1000-4-2/EN 61000-4-2, Level B
Radiated Susceptibility: IEC 1000-4-3/EN 61000-4-3, Level A
Electrical Fast Transient: IEC 1000-4-4/EN 61000-4-4, Level B
Radio Frequency–Conducted: IEC 1000-4-6/EN 61000-4-6, Level A
Power Frequency–Magnetic: IEC 1000-4-8/EN 61000-4-8, Level A
Dielectric: IEC 255
Surge Immunity: IEC 1000-4-5/EN 61000-4-5, Level B
Voltage Dips, Interruptions,
and Variations Immunity: IEC 1000-4-11/EN 61000-4-11, Level C

9287500991 Rev K DECS-100 Human-Machine Interface i
SECTION 2 •HUMAN-MACHINE INTERFACE
TABLE OF CONTENTS
SECTION 2 •HUMAN-MACHINE INTERFACE ....................................................................................... 2-1
INTRODUCTION.................................................................................................................................... 2-1
FRONT PANEL INDICATORS............................................................................................................... 2-1
Overexcitation Shutdown ................................................................................................................... 2-1
Generator Overvoltage....................................................................................................................... 2-1
Loss of Generator Sensing................................................................................................................. 2-1
Overexcitation Limiting ....................................................................................................................... 2-2
Underexcitation Limiting ..................................................................................................................... 2-2
Var/P.F. Mode Active ......................................................................................................................... 2-2
Manual Mode Active........................................................................................................................... 2-2
Underfrequency Active ....................................................................................................................... 2-2
COMMUNICATION PORT..................................................................................................................... 2-2
Figures
Figure 2-1. DECS-100 Front Panel Indicators........................................................................................... 2-1
Figure 2-2. DECS-100 Communication Port Location............................................................................... 2-2

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