Basler DECS-100 User manual

Publication: 9 2875 00 991
Revision: B 08/01
INSTRUCTION MANUAL
for
DECS-100
Digital Excitation Control System

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
 Human-Machine Interface
 Functional Description
 Installation
 BESTCOMS Communication Software
 Installation and Troubleshooting
WARNING!
Toavoidpersonalinjuryorequipmentdamage,onlyqualifiedpersonnelshould
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 is de-energized.
CAUTION
The Manual mode excitation level must be evaluated prior to enabling this
feature. If the level of excitation current is inappropriate for the generator,
severe damage to the generator may occur.
Improper PID numbers will result in poor system performance or system
damage.
Before uploading a settings file, remove operating power from the DECS-100,
disconnect the field wiring from terminals F+ and F–, and re-apply operating
power to the DECS-100.
Before uploading a settings file, remove operating power from the DECS-100,
disconnect the field wiring from terminals F+ and F–, and re-apply operating
power to the DECS-100.
NOTE
Be sure that the DECS-100 is hard-wired to earth ground with no smaller than
12AWGcopperwireattachedtothegroundterminalontherearoftheunitcase.
When the unit is configured in a system with other devices, it is recommended
to use a separate lead to the ground bus from each unit.

DECS-100 Introductionii
First Printing: March 2001
Printed in USA
© 2001, Basler Electric, Highland, IL 62249 USA
August 2001
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 designof all features and options are subject to modification without notice. Should
further information be required, contact Basler Electric.
BASLER ELECTRIC
ROUTE 143, BOX 269
HIGHLAND, IL, 62249 USA
http://www.basler.com, [email protected]
PHONE [phone] FAX [phone]
CONFIDENTIAL INFORMATION
ofBasler Electric,Highland, IL.Itis loaned for confidential use, subjectto return
on request, and with the mutual understanding that it will not be used in any
manner detrimental to the interest of Basler Electric.

DECS-100 Introduction iii
MANUAL REVISION HISTORY
The following information provides a historical summary of the changes made to the DECS-100
Instruction Manual (9 2875 00 991). Revisions are listed in reverse chronological order.
Manual Version,
ECO, and Date Change
Rev B, 14282, 08/01 Added
Embedded Software subsection to Section 5, BESTCOMS
Software for the Windows Operating System
. Corrected various
minor errors throughout the manual.
Rev A, 12623, 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.
Rev None, 03/01 Initial release

DECS-100 Introductioniv

DECS-100 Introduction v
CONTENTS
Adetailedtableofcontentsisprovidedatthestartofeachmanualsection.Themanualsectionsare
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 for the Windows®Operating System ............. 5-1
Section 6 BESTCOMS Software for the Palm OS®Platform ..................... 6-1
Section 7 Maintenance and Troubleshooting ................................. 7-1

DECS-100 General Information i
SECTION 1 • GENERAL INFORMATION
TABLE OF CONTENTS
SECTION 1 • GENERAL INFORMATION ............................................... 1-1
GENERAL ..................................................................... 1-1
FEATURES .................................................................... 1-1
MODEL AND STYLE NUMBER DESCRIPTION ....................................... 1-1
General ................................................................... 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 .......................................................... 1-2
Communication Port ...................................................... 1-2
Contact Input Circuits ..................................................... 1-2
Common Alarm Output .................................................... 1-3
Field Output ............................................................. 1-3
AVR Operating Mode ..................................................... 1-3
FCR (Manual) Operating Mode .............................................. 1-3
Var Operating Mode (Optional) .............................................. 1-3
PF Operating Mode (Optional) .............................................. 1-3
Parallel Compensation .................................................... 1-3
Field Overvoltage Protection ................................................ 1-3
Field Overcurrent Protection ................................................ 1-3
Generator Overvoltage Protection ............................................ 1-3
Soft-Start Function (AVR Mode Only) ......................................... 1-3
Voltage Matching ......................................................... 1-3
Metering (BESTCOMS) .................................................... 1-3
Environment ............................................................. 1-4
Type Tests .............................................................. 1-4
Physical ................................................................ 1-4
UL Recognition .......................................................... 1-4
CSA Certification ......................................................... 1-4
CE Compliance .......................................................... 1-4
Patent ................................................................. 1-4
Figures
Figure 1-1. DECS-100 Style Chart ..................................................... 1-2
Figure 1-2. Typical V/Hz Curves ....................................................... 1-3

DECS-100 General Information 1-1
SECTION 1 • GENERAL INFORMATION
GENERAL
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 encapsulated 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.
CFour control modes: automatic voltage regulation (AVR), manual or field current regulation (FCR),
power factor (PF) regulation, and reactive power (var) regulation.
CProgrammable stability settings.
CSoft start and voltage buildup control with an adjustable ramp in AVR control mode.
COverexcitation (OEL) limiting in AVR, var, and PF control modes.
CUnderfrequency (volts/hertz) regulation.
CThree-phase or single-phase generator voltage (RMS ) sensing/regulation in AVR mode.
CSingle-phase bus voltage (RMS ) sensing.
CSingle-phase generator current sensing for metering and regulation purposes.
CField current and field voltage sensing.
COne analog input for proportional remote control of the setpoint.
CFive contact sensing inputs for system interface.
COne common output relay for alarm indication and trip functions.
CFour protection functions (field overvoltage, field overcurrent, generator overvoltage, and loss of
sensing).
CGenerator paralleling with reactive droop compensation and reactive differential compensation.
CRear RS-232 communication port for personal computer communication using BESTCOMS
Windows® based software for fast, user-friendly, setup and control.
MODEL AND STYLE NUMBER DESCRIPTION
General
DECS-100 electrical characteristics and operational features are defined by a combination of letters and
numbers that make up the 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
Style number identification chart Figure 1-1 defines the electrical characteristics and operational features
available in the DECS-100.

DECS-100 General Information1-2
Figure 1-1. DECS-100 Style Chart
For example, if the style number was A15, the device would have the following characteristics and operating
features.
A.... Novar or power factor control
1 .... Voltage matching
5 .... 5ampere CT secondary
SPECIFICATIONS
DECS-100 electrical and physical specifications are listed in the following paragraphs.
Operating Power
Three-Phase: 200 to 250 VL-L
Single-Phase: 88 to 110 Vac
Frequency Range: 50 to 400 Hz
Burden: 650 VA
Terminals: 3, 4, 5
Generator Voltage Sensing
Type: 1-phase/3-phase, 4 ranges
Burden: <1 VA per phase
Terminals: E1, E2, E3
50 Hertz Sensing
Range 1: 100 Vac (85 to 132 Vac)
Range 2: 200 Vac (190 to 220 Vac)
Range 3: 400 Vac (380 to 440 Vac)
Range 4: N/A
60 Hertz Sensing
Range 1: 120 Vac (85 to 132 Vac)
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 X1X: 1 Aac maximum continuous
Style X5X: 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
Bus Voltage Sensing (Optional)–continued
50 Hertz Sensing
Range 1: 100 Vac (85 to 132 Vac)
Range 2: 200 Vac (190 to 220 Vac)
Range 3: 400 Vac (380 to 440 Vac)
Range 4: N/A
60 Hertz Sensing
Range 1: 120 Vac (85 to 132 Vac)
Range 2: 240 Vac (170 to 264 Vac)
Range 3: 480 Vac (340 to 528 Vac)
Range 4: 600 Vac (540 to 660 Vac)
Accessory Input
Voltage Range: –3 Vdc to +3 Vdc
Setpoint Range: –30% to +30% shift
Burden: 1 kS
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 Contact
Interrogation Voltage: 13 Vdc
Terminal Assignments for Standard Functions
Unit/Parallel Control: 52L, 52M
Raise: 6U, 7
Lower: 6D, 7

DECS-100 General Information 1-3
Figure 1-2. Typical V/Hz Curves
Contact Input Circuits–continued
Terminal Assignments for Optional Functions
Var/PF Enable: 52J, 52K
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
Field Resistance: 5 Sminimum
Terminals: F+, F–
Continuous Rating: 63 Vdc, 7 Adc
10 Second Forcing Rating
200 Vac Power Input: 135 Vdc, 15 Adc
110 Vac Power Input: 90 Vdc, 10 Adc (9 Sfield)
75 Vdc, 15 Adc (5 Sfield)
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 6 SCR load).
Temperature Drift: ±0.5% for a 40EC change
V/Hz Characteristic: Slope from 0 to 3PU is adjust-
able in 0.01PU increments.
Transition (Corner) frequency
is adjustable from 40 to 65 Hz.
See Fig. 1-2 for V/Hz curves.
Response Time: Within 1 cycle
FCR (Manual) Operating Mode
Adjustment Range: 0 to 7 Adc
Increment: 0.1 A
Var Operating Mode (Optional)
Adjustment Range: 100% to –100%
Increment: 0.1%
PF Operating Mode (Optional)
Adjustment Range: 0.6 lead to 0.6 lag
Increment: 0.001
Parallel Compensation
Modes: Reactive Droop and Reactive
Differential (cross-current)t
Droop Adjust Range: 0 to 10%
Increment: 1%
tBurden 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 seconds (fixed)
Field Overcurrent Protection
Pickup
Range: 0 Adc to 15 Adc
Increment: 0.001 Adc
Time Delay
Range: 0 to 10 seconds
Increment: 1 second
Generator Overvoltage Protection
Pickup 100% to 120% of system
voltage setting
Increment: 1.0%
Time Delay: 0.75 seconds (fixed)
Soft-Start Function (AVR Mode Only)
Time Adjust Range: 1 to 7,200 seconds
Increment: 1 second
Voltage Matching
Accuracy: Generator rms voltage is
matched with the bus rms
voltage to within ±0.5% of the
generator voltage.
Time Adjustment
Range: 0 to 300 seconds
Increment: 0.01 seconds
Metering (BESTCOMS)
Generator Voltage
Range: 10 V to 79 kV
Accuracy: ±0.5% (at 25EC)
Generator Current
Range: 0.04 to 1,000 A (1 A CTs)
0.1 to 5,000 A (5 A CTs)
Accuracy: ±0.5% (at 25EC)