2-20
F35 MULTIPLE FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 2: PRODUCT DESCRIPTION
2
Operate time:
<
30 ms at 1.10
×
pickup at 60 Hz
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
NEUTRAL OVERVOLTAGE
Pickup level:
0.004 to 3.000 pu in steps of 0.001
Dropout level:
97 to 98% of pickup
Level accuracy:
±0.5% of reading from 10 to 208 V
Pickup delay:
0.00 to 600.00 s in steps of 0.01 (definite time) or user-defined curve
Reset delay:
0.00 to 600.00 s in steps of 0.01
Curve timing accuracy at >1.1 pickup: ±3.5% of operate time or ±1 cycle (whichever is greater) from pickup to operate
Operate time:
<
30 ms at 1.10 pickup at 60 Hz
AUXILIARY OVERVOLTAGE
Pickup level:
0.004 to 3.000 pu in steps of 0.001
Dropout level:
97 to 98% of pickup
Level accuracy:
±0.5% of reading from 10 to 208 V
Pickup delay:
0 to 600.00 s in steps of 0.01
Reset delay:
0 to 600.00 s in steps of 0.01
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
Operate time:
<
30 ms at 1.10
×
pickup at 60 Hz
UNDERFREQUENCY
Minimum signal:
0.10 to 1.25 pu in steps of 0.01
Pickup level:
20.00 to 65.00 Hz in steps of 0.01
Dropout level:
0.03 Hz
Level accuracy:
±0.001 Hz
Time delay:
0 to 65.535 s in steps of 0.001
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
Operate time:
typically 4 cycles at 0.1 Hz/s change
typically 3.5 cycles at 0.3 Hz/s change
typically 3 cycles at 0.5 Hz/s change
Typical times are average operate times including variables such as frequency change instance, test method, and so on, and can vary by
±0.5 cycles.
BREAKER ARCING CURRENT
Principle:
accumulates breaker duty (I
2
t) and measures fault duration
Initiation:
programmable per phase from any FlexLogic operand
Compensation for auxiliary relays:
0 to 65.535 s in steps of 0.001
Alarm threshold:
0 to 50000 kA
2
-cycle in steps of 1
Fault duration accuracy:
0.25 of a power cycle
Availability:
1 per CT bank with a minimum of 2
BREAKER FLASHOVER
Operating quantity:
phase current, voltage, and voltage difference
Pickup level voltage:
0.004 to 1.500 pu in steps of 0.001
Dropout level voltage:
97 to 98% of pickup
Pickup level current:
0.020 to 1.500 pu in steps of 0.001
Dropout level current:
97 to 98% of pickup
Level accuracy:
±0.5% or ±0.1% of rated, whichever is greater
Pickup delay:
0 to 65.535 s in steps of 0.001
Timer accuracy:
±3% of operate time or ±42 ms, whichever is greater
Operate time:
<42 ms at 1.10
×
pickup at 60 Hz
BREAKER RESTRIKE
Principle:
detection of high-frequency overcurrent condition ¼ cycle after breaker opens
Availability:
one per digital signal processor (DSP)
Pickup level:
0.1 to 2.00 pu in steps of 0.01
