GE 239

GE Multilin 239 Motor Protection Relay 1-7
1 OVERVIEW 1 OVERVIEW
1
1.4 SPECIFICATIONS
PHASE CURRENT INPUTS
CONVERSION: true rms, 16 samples/cycle
CT INPUT: 1 A and 5 A secondary
RANGE: 0.1 to 11 × phase CT primary
FREQUENCY: 20 to 300 Hz
ACCURACY: ±2% of full scale
GROUND CURRENT INPUTS
CONVERSION: true rms, 16 samples/cycle
CT INPUT: 5 A secondary and 50:0.025
RANGE: 0.03 to 1.4 × CT primary (5A CT)
0.05 to 16.0 A (50:0.025 CT)
FREQUENCY: 20 to 300 Hz
ACCURACY:
5 A CT: ±2% of full scale (5A CT)
50:0.025 CT: ±0.03 A (0 to 0.49 A)
±0.07 A (0.50 to 3.99 A)
±0.20 A (4.00 to 16.00 A)
OVERLOAD CURVES TRIP TIME
CURVES: 15 curves, fixed shape
OVERLOAD PICKUP INHIBIT: 1.00 to 5.00 × FLC
PICKUP LEVEL: 1 to 1500 A
ACCURACY:
PICKUP: ± 1% of Displayed Value
TIME: ± 2% of trip time or ± 1 sec
whichever is greater
SHORT CIRCUIT & GROUND TRIP
GROUND TRIP LEVEL: 0.05 to 15A (50:0.025 CT)
3 to 100% (5 A CT)
S/C TRIP LEVEL: 1 to 11 × CT PRI / OFF
INTENTIONAL DELAY:INST. or 10 to 60000 ms
programmable
INST: 20 to 45 ms
* TOTAL DELAY: INST + INTENTIONAL
* trip time accuracy guaranteed if
current > 1.4 × trip level setting
BREAKER FAILURE TIMING
DELAY: INST. or 10 to 60000 ms
programmable
INST: 20 to 45ms
* TOTAL DELAY: INST + INTENTIONAL
* trip time accuracy guaranteed if
current > 1.4 × trip level setting
START PROTECTION
THERMAL: separate start & run protection
ACTIVATION: inrush 3 phase current increases
from <5% to >101% FLC in 1 s
DEACTIVATION: current drops to <100% FLC
motor running if current >5%
FLC
LOCKED ROTOR: 0.5 to 11.0 ×FLC
SAFE STALL TIME: 1.0 to 600.0 sec
THERMAL MODELING
THERMAL CAPACITY: separate start/run,
exponential cool down
COOL RATE:
STOP: 1 to 5000 minutes programmable
RUN: 50% of stopped cool time
HOT/COLD: 50 to 100%, hot after 15 min running
LOCKOUT: 1 to 5000 min programmable ±20%
power on / off
UNBALANCE
RANGE: 5 to 100% / OFF
ACCURACY: ± 2%
DELAY: 0 - 60 sec
CALCULATION:
where:
I
AV
= average phase current
I
M
= current in phase with max dev. from I
AV
I
FLC
= full load current setting
THERMISTOR
TYPE: PTC or NTC programmable
HOT RESISTANCE:100 to 30 000 Ω
COLD RESISTANCE: 100 to 30 000 Ω
DELAY: 2 sec
ACCURACY: ±5% or 100 Ω, whichever is
greatest
UNDERCURRENT
RANGE: 5 to 100% FLC / OFF
DELAY: 0 to 250 sec
If I
AV
I
FLC
, UB%≥
I
M
I
AV
–
I
AV
-----------------------
100×=
If I
AV
I
FLC
, UB%<
I
M
I
AV
–
I
FLC
-----------------------
100×=