GE C70 Instruction Manual page 36

SPECIFICATIONS
Level accuracy:
Pickup delay:
Reset delay:
Timer accuracy:
Operate time:
NEGATIVE SEQUENCE OVERVOLTAGE
Pickup level:
2
Dropout level:
Level accuracy:
Pickup delay:
Reset delay:
Timer accuracy:
Operate time:
BREAKER FAILURE
Mode:
Current supervision:
Current supv. pickup:
Current supv. dropout:
Current supv. accuracy:
0.1 to 2.0 × CT rating:
above 2 × CT rating:
BREAKER ARCING CURRENT
Principle:
Initiation:
Compensation for auxiliary relays:
Alarm threshold:
Fault duration accuracy:
Availability:
BREAKER FLASHOVER
Operating quantity:
Pickup level voltage:
Dropout level voltage:
Pickup level current:
Dropout level current:
Level accuracy:
Pickup delay:
Timer accuracy:
Operate time:
BREAKER RESTRIKE
Principle:
Availability:
Pickup level:
Reset delay:
THERMAL OVERLOAD PROTECTION
Thermal overload curves:
Base current:
Overload (k) factor:
Trip time constant:
Reset time constant:
Minimum reset time:
2-22
±0.5% of reading from 10 to 208 V
0 to 600.00 s in steps of 0.01
0 to 600.00 s in steps of 0.01
±3% of operate time or ±1/4 cycle (whichever is greater)
<30 ms at 1.10 × pickup at 60 Hz
0.004 to 1.250 pu in steps of 0.001
97 to 98% of pickup
±0.5% of reading from 10 to 208 V
0 to 600.00 s in steps of 0.01
0 to 600.00 s in steps of 0.01
±3% of operate time or ±20 ms, whichever is greater
<30 ms at 1.10 × pickup at 60 Hz
1-pole, 3-pole
phase, neutral current
0.020 to 30.000 pu in steps of 0.001
97 to 98% of pickup
±0.75% of reading or ±2% of rated (whichever is greater)
±2.5% of reading
2
accumulates breaker duty (I t) and measures fault duration
programmable per phase from any FlexLogic operand
0 to 65.535 s in steps of 0.001
2
0 to 50000 kA -cycle in steps of 1
0.25 of a power cycle
1 per CT bank with a minimum of 2
phase current, voltage, and voltage difference
0.004 to 1.500 pu in steps of 0.001
97 to 98% of pickup
0.020 to 1.500 pu in steps of 0.001
97 to 98% of pickup
±0.5% or ±0.1% of rated, whichever is greater
0 to 65.535 s in steps of 0.001
±3% of operate time or ±42 ms, whichever is greater
<42 ms at 1.10 × pickup at 60 Hz
detection of high-frequency overcurrent condition ¼ cycle after breaker opens
one per digital signal processor (DSP)
0.1 to 2.00 pu in steps of 0.01
0.000 to 65.535 s in steps of 0.001
IEC 255-8 curve
0.20 to 3.00 pu in steps of 0.01
1.00 to 1.20 pu in steps of 0.05
0 to 1000 min. in steps of 1
0 to 1000 min. in steps of 1
0 to 1000 min. in steps of 1
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION