Technical Specifications; Protection Elements - GE Multilin G650 Manual

2 PRODUCT DESCRIPTION

2.4 TECHNICAL SPECIFICATIONS

NOTE: TECHNICAL SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
Phase and ground units use as operation magnitude the current value received by the unit in current inputs, while the
neutral unit uses the calculated current value from the three phase currents.
The isolated ground unit will be used only for those applications where the neutral is completely isolated, and it uses the
fifth CT of the unit. This CT has a sensitivity that is 10 times higher than the universal model (connected to 1A or 5A
transformers). Therefore, it does not admit such a high permanent overload.
2.4.1.1 PHASE TIME OVERCURRENT (51PH/51PL)
Current Input
Rated current
Pickup level
Dropout level
Level Accuracy
Curve Shapes
Curve Multiplier (Time Dial)
Reset type
Timing accuracy
Voltage restraint
Saturation Level
Snapshot Events
GEK-113285A
Phasor (without harmonics) or RMS
For connection to 1 or 5 A CTs.
0.05 to 160.00 A in steps of 0.01 A
97% to 98% of the pickup level
Values at nominal frequency:
±0.5% of the reading ± 10 mA from 0.05 to 10 A
±1.5% of the reading for higher values.
IEEE extremely / very / moderately inverse
IEC A/B/C/long-time inverse/short time inverse curve
IAC extremely / very / moderately inverse
ANSI extremely / very / normally / moderately inverse
2
I t
Definite time
Rectifier curve
FlexCurve™ A/B/C/D user curve
0.00 to 900.00 s in steps of 0.01 s
Instantaneous or time delayed according to IEEE
Operate at > 1.03 times the pickup ±3% of operate time or
50 ms. (whichever is greater)
Selectable by setting
48 times the pickup level
Selectable by setting
G650 Generator Protection & Control System
2.4 TECHNICAL SPECIFICATIONS

2.4.1 PROTECTION ELEMENTS

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