2-12 G650 Generator Protection & Control System GEK-113285A
2.4 TECHNICAL SPECIFICATIONS 2 PRODUCT DESCRIPTION
2.4.1.10 GENERATOR UNBALANCE (46)
2.4.1.11 GROUND DIRECTIONAL (67G)
2.4.1.12 NEUTRAL DIRECTIONAL (67N)
Gen. nominal current 0.00 to 10.00 A in steps of 0.01 A (rated full load
current of the machine
)
Stages 2 (
(I2t with linear reset and definite time))
Pickup level 0.00 to 100.00% in steps of 0.01
Dropout level 97% to 98 % of the pickup level
Level Accuracy Values at nominal frequency
±0.5% of the reading ± 10 mA from 0.1 to 10 A
±1.5% of the reading for higher values
Time dial (K-value) 0.00 to 100.00 in steps of 0.01
Pickup delay 0.0 to 1000.0 s in steps of 0.1
Reset delay 0.0 to 1000.0 s in steps of 0.1
Operate time <50 ms at 50 Hz, typically
Timing accuracy ±3% of operate time or 50 ms. (whichever is greater)
Snapshot Events Selectable by setting
Directionality Forward and reverse selectable by setting
Polarizing Voltage, current, dual
Polarizing Voltage V
N
(measured or calculated, selected by setting)
Polarizing Current
Isg (measured from 5
th
current transformer)
Operating Current
Ig (measured from 4
th
current transformer)
Polarizing Voltage threshold 0 to 00 Vac in steps of 1 V
Polarizing Current threshold 0.005 A
Characteristic angle -90º to +90º in steps of 1º
Block Logic Permission or Block selectable by setting
Angle accuracy
±2º for I>0.1 A and V>5 Vac
Operate time <30ms, typically
Directionality Forward and reverse selectable by setting
Polarizing Voltage, current, dual
Polarizing Voltage V
N
(measured or calculated, selected by setting)
Polarizing Current
Isg (measured from 5
th
current transformer)
Operating Current I
N
Polarizing Voltage threshold 0 to 00 Vac in steps of 1 V
Polarizing Current threshold 0.005 A
Characteristic angle -90º to +90º in steps of 1º
Block Logic Permission or Block selectable by setting
Angle accuracy
±2º for I>0.1 A and V>5 Vac
Operate time <30ms, typically
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