2-22 G30 Generator Protection System GE Multilin
2.4 SPECIFICATIONS 2 PRODUCT DESCRIPTION
2
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
Timer accuracy: ±3% of operate time or ±1/4 cycle
(whichever is greater)
95% settling time for df/dt: <24 cycles
Operate time: typically 9.5 cycles at 2 × pickup
typically 8.5 cycles at 3 × pickup
typically 6.5 cycles at 5 × pickup
Typical times are average operate times including variables such
as frequency change instance, test method, etc., and may vary by
±0.5 cycles.
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
Timer 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)
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
Timer accuracy: ±3% of operate time or ±20 ms, which-
ever is greater
Operate time: <50 ms
THERMAL OVERLOAD PROTECTION
Thermal overload curves: IEC 255-8 curve
Base current: 0.20 to 3.00 pu in steps of 0.01
Overload (k) factor: 1.00 to 1.20 pu in steps of 0.05
Trip time constant: 0 to 1000 min. in steps of 1
Reset time constant: 0 to 1000 min. in steps of 1
Minimum reset time: 0 to 1000 min. in steps of 1
Timer accuracy (cold curve): ±100 ms or 2%, whichever is greater
Timer accuracy (hot curve): ±500 ms or 2%, whichever is greater
for I
p
< 0.9 × k × I
b
and I / (k × I
b
) > 1.1
TRIP BUS (TRIP WITHOUT FLEXLOGIC)
Number of elements: 6
Number of inputs: 16
Operate time: <2 ms at 60 Hz
Timer accuracy: ±3% or 10 ms, whichever is greater
2.4.2 USER-PROGRAMMABLE ELEMENTS
FLEXLOGIC
Programming language: Reverse Polish Notation with graphical
visualization (keypad programmable)
Lines of code: 512
Internal variables: 64
Supported operations: NOT, XOR, OR (2 to 16 inputs), AND (2
to 16 inputs), NOR (2 to 16 inputs),
NAND (2 to 16 inputs), latch (reset-domi-
nant), edge detectors, timers
Inputs: any logical variable, contact, or virtual
input
Number of timers: 32
Pickup delay: 0 to 60000 (ms, sec., min.) in steps of 1
Dropout delay: 0 to 60000 (ms, sec., min.) in steps of 1
FLEXCURVES™
Number: 4 (A through D)
Reset points: 40 (0 through 1 of pickup)
Operate points: 80 (1 through 20 of pickup)
Time delay: 0 to 65535 ms in steps of 1
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