2-22
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 2: PRODUCT DESCRIPTION
2
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
NEGATIVE SEQUENCE OVERVOLTAGE
Pickup level:
0.004 to 1.250 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 ±20 ms, whichever is greater
Operate time:
<30 ms at 1.10
×
pickup at 60 Hz
BREAKER FAILURE
Mode:
1-pole, 3-pole
Current supervision:
phase, neutral current
Current supv. pickup:
0.020 to 30.000 pu in steps of 0.001
Current supv. dropout:
97 to 98% of pickup
Current supv. accuracy:
0.1 to 2.0
×
CT rating:
±0.75% of reading or ±2% of rated (whichever is greater)
above 2
×
CT rating:
±2.5% of reading
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
Reset delay:
0.000 to 65.535 s in steps of 0.001
OPEN BREAKER ECHO
Keying of the transmitter in case one end of the line is open or weak-infeed at the terminal.
SYNCHROCHECK
Max voltage difference:
0 to 400000 V in steps of 1
Max angle difference:
0 to 100
°
in steps of 1
Max freq. difference:
0.00 to 2.00 Hz in steps of 0.01