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1 OVERVIEW
PHASE CURRENT INPUTS
CONVERSION:
true rms, 16 samples/cycle
CT INPUT:
1 A and 5 A secondary
0.1 to 11 × phase CT primary
RANGE:
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
0.03 to 1.4 × CT primary (5A CT)
RANGE:
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)
S/C TRIP LEVEL:
1 to 11 × CT PRI / OFF
INTENTIONAL DELAY:INST. or 10 to 60000 ms
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
GE Multilin
Courtesy of NationalSwitchgear.com
3 to 100% (5 A CT)
programmable
239 Motor Protection Relay
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:
≥
If I
I
, UB%
AV
FLC
<
If I
I
, UB%
AV
FLC
where: I
= average phase current
AV
I
= current in phase with max dev. from I
M
I
= full load current setting
FLC
THERMISTOR
TYPE:
PTC or NTC programmable
HOT RESISTANCE:100 to 30 000 Ω
COLD RESISTANCE: 100 to 30 000 Ω
DELAY:
2 sec
±5% or 100 Ω, whichever is
ACCURACY:
greatest
UNDERCURRENT
RANGE:
5 to 100% FLC / OFF
DELAY:
0 to 250 sec
1 OVERVIEW
1.4 SPECIFICATIONS
I
–
I
M
AV
×
---------------------- -
=
100
I
AV
I
I
–
M
AV
×
---------------------- -
=
100
I
FLC
AV
1-7
1
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