GE Multilin g60 Instruction Manual page 45

2 PRODUCT DESCRIPTION
FIELD CURRENT
Field current measurement (dcmA) accuracy: ±0.2% of full scale
Field overcurrent and undercurrent operating time: 1 power sys-
tem cycle
Field current element dropout level accuracy: 102 to 103% of
pickup for undercurrent and 97 to 98% of
pickup for overcurrent
Time delay accuracy: ±3% of time delay setting or ±4 ms which-
ever is greater
UNDERFREQUENCY
Minimum signal: 0.10 to 1.25 pu in steps of 0.01
Pickup level: 20.00 to 65.00 Hz in steps of 0.01
Dropout level: pickup + 0.03 Hz
Level accuracy: ±0.001 Hz
Time delay: 0 to 65.535 s in steps of 0.001
Timer accuracy: ±3% or 4 ms, whichever is greater
Operate time: typically 4 cycles at 0.1 Hz/s change
typically 3.5 cycles at 0.3 Hz/s change
typically 3 cycles at 0.5 Hz/s change
Typical times are average operate times including variables such
as frequency change instance, test method, etc., and may vary by
±0.5 cycles.
OVERFREQUENCY
Pickup level: 20.00 to 65.00 Hz in steps of 0.01
Dropout level: pickup – 0.03 Hz
Level accuracy: ±0.001 Hz
Time delay: 0 to 65.535 s in steps of 0.001
Timer accuracy: ±3% or 4 ms, whichever is greater
Operate time: typically 4 cycles at 0.1 Hz/s change
typically 3.5 cycles at 0.3 Hz/s change
typically 3 cycles at 0.5 Hz/s change
Typical times are average operate times including variables such
as frequency change instance, test method, etc., and may vary by
±0.5 cycles.
RATE OF CHANGE OF FREQUENCY
df/dt trend: increasing, decreasing, bi-directional
df/dt pickup level: 0.10 to 15.00 Hz/s in steps of 0.01
df/dt dropout level: 96% of pickup
df/dt level accuracy: 80 mHz/s or 3.5%, whichever is greater
Overvoltage supv.: 0.100 to 3.000 pu in steps of 0.001
Overcurrent supv.: 0.000 to 30.000 pu in steps of 0.001
Pickup delay: 0 to 65.535 s in steps of 0.001
Reset delay: 0 to 65.535 s in steps of 0.001
Time accuracy: ±3% or ±4 ms, whichever is greater
95% settling time for df/dt: < 24 cycles
typically 6.5 cycles at 2  pickup
Operate time:
typically 5.5 cycles at 3  pickup
typically 4.5 cycles at 5  pickup
GE Multilin
TURBINE FREQUENCY OUT-OF-BAND (OOB)
ACCUMULATED OPERATING TIME
Frequency OOB accumulation: 7 sets; 20 to 70 Hz in steps of 0.01
Frequency OOB accumulation pickup: 1 to 65536 s in steps of 1
Frequency OOB accumulator preset: 1 to 65536 s in steps of 1
Level accuracy:
Minimum volt/amp supervision: 0.1 to 1.25 pu of V_1 or I_1
Timing accuracy of accumulation: ±1% or 1 second, whichever is
SYNCHROCHECK
Max voltage difference: 0 to 400000 V in steps of 1
Max angle difference:
Max freq. difference:
Hysteresis for max. freq. diff.: 0.00 to 0.10 Hz in steps of 0.01
Dead source function:
POWER SWING DETECT
Functions:
Characteristic:
Measured impedance:
Blocking / tripping modes: 2-step or 3-step
Tripping mode:
Current supervision:
Pickup level:
Dropout level:
Fwd / reverse reach (sec. ): 0.10 to 500.00  in steps of 0.01
Left and right blinders (sec. ): 0.10 to 500.00  in steps of 0.01
Impedance accuracy:
Fwd / reverse angle impedances: 40 to 90° in steps of 1
Angle accuracy:
Characteristic limit angles: 40 to 140° in steps of 1
Timers:
Timing accuracy:
ACCIDENTAL ENERGIZATION
Operating condition:
Arming condition:
Overcurrent:
Pickup level:
Dropout level:
Level accuracy:
Undervoltage:
Pickup level:
Dropout level:
Level accuracy:
Operate Time:
G60 Generator Protection System
2.2 SPECIFICATIONS
±0.01 Hz
greater
°
0 to 100 in steps of 1
0.00 to 2.00 Hz in steps of 0.01
None, LV1 & DV2, DV1 & LV2, DV1 or
DV2, DV1 xor DV2, DV1 & DV2
(L = Live, D = Dead)
Power swing block, Out-of-step trip
Mho or Quad
Positive-sequence
Early or Delayed
0.050 to 30.000 pu in steps of 0.001
97 to 98% of pickup
±5%
±2°
0.000 to 65.535 s in steps of 0.001
±3% or 4 ms, whichever is greater
Overcurrent
Undervoltage and/or Machine Offline
0.000 to 3.000 pu in steps of 0.001
97 to 98% of pickup
±0.5% of reading from
0.1 to 2.0  CT rating
0.000 to 3.000 pu in steps of 0.001
102 to 103% of pickup
±0.5% of reading 10 to 208 V
< 30 ms at 1.10  pickup at 60 Hz
2
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