2-18 M60 Motor Protection System GE Multilin
2.3 SPECIFICATIONS 2 PRODUCT DESCRIPTION
2
PHASE DIRECTIONAL OVERCURRENT
Relay connection: 90° (quadrature)
Quadrature voltage: ABC phase seq.: phase A (V
BC
), phase
B (V
CA
), phase C (V
AB
); ACB phase
seq.: phase A (V
CB
), phase B (V
AC
),
phase C (V
BA
)
Polarizing voltage threshold: 0.000 to 3.000 pu in steps of 0.001
Current sensitivity threshold: 0.05 pu
Characteristic angle: 0 to 359
° in steps of 1
Angle accuracy: ±2°
Operation time (FlexLogic operands):
Tripping (reverse load, forward fault):
12 ms, typically
Blocking (forward load, reverse fault):
8 ms, typically
NEUTRAL DIRECTIONAL OVERCURRENT
Directionality: Co-existing forward and reverse
Polarizing: Voltage, Current, Dual, Dual-V, Dual-I
Polarizing voltage: V_0 or VX
Polarizing current: IG
Operating current: I_0
Level sensing: 3 (|I_0| – K |I_1|), IG
Restraint, K: 0.000 to 0.500 in steps of 0.001
Characteristic angle: –90 to 90° in steps of 1
Limit angle: 40 to 90° in steps of 1, independent for
forward and reverse
Angle accuracy: ±2°
Offset impedance: 0.00 to 250.00 in steps of 0.01
Pickup level: 0.002 to 30.000 pu in steps of 0.01
Dropout level: 97 to 98%
Operation time: <16 ms at 3 pickup at 60 Hz
AMP UNBALANCE
Average and full load amps: RMS
I_1 and I_2 amps: phasor
Pickup level: 0.0 to 100.0% in steps of 0.1
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.1
Pickup delay: 0.00 to 600.00 s in steps of 0.01
Reset delay: 0.00 to 600.00 s in steps of 0.01
Operate time: <20 ms at 1.10 pickup at 60 Hz
Timer accuracy: ±3% of operate time or ±20 ms, which-
ever is greater
MECHANICAL JAM
Operating condition: Phase overcurrent
Arming condition: Motor not starting
Pickup level: 1.00 to 10.00 FLA in steps of 0.01
Dropout level: 97 to 98% of pickup
Level accuracy: at 0.1 to 2.0
CT: ±0.5% of reading
at >2.0
CT rating: ±1.5% of reading
Pickup delay: 0.10 to 600.00 s in steps of 0.01
Reset delay: 0.00 to 600.00 s in steps of 0.01
Timer accuracy: ±3% of operate time or ±20 ms, which-
ever is greater
ACCELERATION TIME
Acceleration current: 1.00 to 10.00 FLA in steps of 0.01
Acceleration time: 0.00 to 180.00 s in steps of 0.01
Operating mode: Definite Time, Adaptive
Timer accuracy: ±100 ms or ±0.5% of total time (which-
ever is greater)
Level accuracy: ±0.5% of reading or ±0.4% of rated
(whichever is greater) at 0.1 to 2.0 × CT
rating; ±1.5% of reading at >2.0 × CT rat-
ing
UNDERPOWER
Operation: three-phase apparent power
Number of elements: 2, alarm and trip stages in each element
Pickup level: 0.05 to 2.00 pu in steps of 0.01
Pickup level accuracy: ±1.0% of reading
Hysteresis: 3%
Pickup delay: 0 to 600.00 s in steps of 0.01
Timer accuracy: ±3% of operate time or ±10 ms, which-
ever is greater
Operate time: <35 ms at 60 Hz
UNDERCURRENT
Operation: per-phase current
Number of elements: one with 2 stages, alarm and trip
Pickup level: 0.10 to 0.95 FLA in steps of 0.01
Pickup level accuracy: ±0.5% of reading or ±0.4% of rated
(whichever is greater) at 0.1 to 2.0 CT
rating; ±1.5% of reading at >2.0 CT rat-
ing
Dropout level: 102 to 103% of pickup
Pickup delay: 0 to 600.00 s in steps of 0.01
Timer accuracy: ±3% of operate time or ±10 ms, which-
ever is greater
Pickup time: <55 ms at 60 Hz
SENSITIVE DIRECTIONAL POWER
Measured power: 3-phase, true RMS
Number of stages: 2
Characteristic angle: 0 to 359° in steps of 1
Calibration angle: 0.00 to 0.95° in steps of 0.05
Minimum power: –1.200 to 1.200 pu in steps of 0.001
Pickup level accuracy: ±1% or ±0.001 pu, whichever is greater
Hysteresis: 2% or 0.001 pu, whichever is greater
Pickup 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: <50 ms
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