GE M60 Instruction Manual page 43

2 PRODUCT DESCRIPTION
PHASE DIRECTIONAL OVERCURRENT
°
Relay connection: 90 (quadrature)
Quadrature voltage: ABC phase seq.: phase A (V
B (V ), phase C (V
CA
seq.: phase A (V
phase C (V
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
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
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°
0.00 to 250.00 Ω in steps of 0.01
Offset impedance:
Pickup level: 0.002 to 30.000 pu in steps of 0.01
Dropout level: 97 to 98%
< 16 ms at 3 × pickup at 60 Hz
Operation time:
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
<20 ms at 1.10 × pickup at 60 Hz
Operate time:
Timing accuracy: ±3% or ±20 ms, whichever is greater
MECHANICAL JAM
Operating condition: Phase overcurrent
Arming condition: Motor not starting
1.00 to 10.00 × FLA in steps of 0.01
Pickup level:
Dropout level: 97 to 98% of pickup
Level accuracy: at 0.1 to 2.0
at > 2.0
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
Time accuracy: ±3% or ±20 ms, whichever is greater
GE Multilin
), phase
BC
); ACB phase
AB
), phase B (V ),
CB AC
)
BA
°
in steps of 1
×
CT: ±0.5% of reading
×
CT rating: ±1.5% of reading
M60 Motor Protection System
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
Timing 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
Time accuracy: ±3% or ±10 ms, whichever 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
Time accuracy: ±3% or ±10 ms, whichever 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
Time accuracy: ±3% or ±4 ms, whichever is greater
Operate time: 50 ms
2.2 SPECIFICATIONS
2
2-11