GE Multilin G650 Manual page 38

2 PRODUCT DESCRIPTION
2.4.1.4 SENSITIVE GROUND TIME OVERCURRENT (51SG)
Current Input
Rated current
Pickup level
Dropout level
Level Accuracy
Curve Shapes
Curve Multiplier (Time Dial)
Reset type
Timing accuracy
Saturation Level
Snapshot Events
2.4.1.5 PHASE AND GROUND INSTANTANEOUS OVERCURRENT (50PH50G)
Current Input
Rated current
Pickup level
Dropout level
Level Accuracy
Overreach
Trip delay
Reset delay
Operate time
Timing accuracy
Snapshot Events
GEK-113285A
Phasor (without harmonics) or RMS
For connection to 1 or 5 A CTs.
0.005 to 16.000 A in steps of 0.001 A
97% to 98% of the pickup level
Values at nominal frequency:
±1.5% of the reading ± 1 mA from 0.005 to 16 A
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
I
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)
48 times the pickup level
Selectable by setting
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
< 2%
0.00 to 900.00 s. in steps of 0.01 s.
0.00 to 900.00 s. in steps of 0.01 s.
<50 ms at 3 x Pickup at 50 Hz, typically
at 0 ms time delay (no intentional delay): 50ms
at non-zero time delay: ±3% of operate time or 50 ms
(whichever is greater)
Selectable by setting
G650 Generator Protection & Control System
2.4 TECHNICAL SPECIFICATIONS
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