GE G60 UR Series, Instruction Manual

Page: 45 / 634

GE Multilin G60 Generator Protection System 2-13
2 PRODUCT DESCRIPTION 2.2 SPECIFICATIONS
2
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
Operate time: typically 6.5 cycles at 2
×
pickup
typically 5.5 cycles at 3
×
pickup
typically 4.5 cycles at 5
×
pickup
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: ±0.01 Hz
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
greater
SYNCHROCHECK
Max voltage difference: 0 to 400000 V in steps of 1
Max angle difference: 0 to 100
°
in steps of 1
Max freq. difference: 0.00 to 2.00 Hz in steps of 0.01
Hysteresis for max. freq. diff.: 0.00 to 0.10 Hz in steps of 0.01
Dead source function: None, LV1 & DV2, DV1 & LV2, DV1 or
DV2, DV1 xor DV2, DV1 & DV2
(L = Live, D = Dead)
POWER SWING DETECT
Functions: Power swing block, Out-of-step trip
Characteristic: Mho or Quad
Measured impedance: Positive-sequence
Blocking / tripping modes: 2-step or 3-step
Tripping mode: Early or Delayed
Current supervision:
Pickup level: 0.050 to 30.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Fwd / reverse reach (sec.
Ω
): 0.10 to 500.00
Ω
in steps of 0.01
Left and right blinders (sec.
Ω
): 0.10 to 500.00
Ω
in steps of 0.01
Impedance accuracy: ±5%
Fwd / reverse angle impedances: 40 to 90° in steps of 1
Angle accuracy: ±2°
Characteristic limit angles: 40 to 140° in steps of 1
Timers: 0.000 to 65.535 s in steps of 0.001
Timing accuracy: ±3% or 4 ms, whichever is greater
ACCIDENTAL ENERGIZATION
Operating condition: Overcurrent
Arming condition: Undervoltage and/or Machine Offline
Overcurrent:
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.5% of reading from
0.1 to 2.0
×
CT rating
Undervoltage:
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 102 to 103% of pickup
Level accuracy: ±0.5% of reading 10 to 208 V
Operate Time: < 30 ms at 1.10
×
pickup at 60 Hz
LOSS OF EXCITATION
Operating condition: Positive-sequence impedance
Characteristic: 2 independent offset mho circles
Center: 0.10 to 300.0
Ω
(sec.) in steps of 0.01
Radius: 0.10 to 300.0
Ω
(sec.) in steps of 0.01
Reach accuracy: ±3%
Undervoltage supervision
Level: 0.000 to 1.250 pu in steps of 0.001
Accuracy: ±0.5% of reading from 10 to 208 V
Pickup delay: 0 to 65.535 s in steps of 0.001
Timing accuracy: ±3% or ±20 ms, whichever is greater
Operate time: <50 ms
RTD PROTECTION
Pickup: 1 to 249°C in steps of 1
Dropout level: 2°C of pickup
Timing accuracy: <1 s
Elements: trip and alarm
REMOTE RTD PROTECTION
Pickup level: 1 to 200°C
Dropout level: 2°C of pickup
Time delay: <10 s
Elements: trip and alarm
TRIP BUS (TRIP WITHOUT FLEXLOGIC™)
Number of elements: 6
Number of inputs: 16
Operate time: <2 ms at 60 Hz
Time accuracy: ±3% or 10 ms, whichever is greater