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
S
minimum
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
S
field)
75 Vdc, 15 Adc (5
S
field)
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 40
E
C 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%
t
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 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 25
E
C)
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 25
E
C)