2-6 F650 Digital Bay Controller GE Multilin
2.4 TECHNICAL SPECIFICATIONS 2 PRODUCT DESCRIPTION
2
2.4TECHNICAL SPECIFICATIONS
NOTE: TECHNICAL SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
2.4.1 PROTECTION UNITS
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.
a) PHASE TIME OVERCURRENT WITH VOLTAGE RESTRAINT (51PH/51PL)
b) GROUND TIME OVERCURRENT (51G)
Current Input Phasor (without harmonics) or RMS
Rated current For connection to 1 or 5 A CTs.
Pickup level 0.05 to 160.00 A in steps of 0.01 A
Reset level 98% of the pickup level
Level Accuracy
îČ0.5% of the reading îČ 10 mA from 0.05 to 10 A
îČ1.5% of the reading for higher values.
Curve Shapes IEEE extremely / very / moderately inverse
IEC A/B/C/long-time inverse/short time inverse curve
IAC extremely / very / normally / moderately inverse
ANSI extremely / very / normally / moderately inverse
I
2
t
Definite time
Rectifier curve
FlexCurveî A/B/C/D user curve
Curve Multiplier (Time Dial) 0.00 to 900.00 s in steps of 0.01 s
Reset type Instantaneous or time delayed according to IEEE
Timing accuracy Operate at > 1.03 times the pickup ±3.5% of operate time or
30 ms. (whichever is greater)
Voltage restraint Selectable by setting
Saturation Level 48 times the pickup level
Snapshot Events Selectable by setting
Current Input Phasor (without harmonics) or RMS
Rated current For connection to 1 or 5 A CTs.
Pickup level 0.05 to 160.00 A in steps of 0.01 A
Reset level 98% of the pickup level
Level Accuracy
îČ0.5% of the reading îČ 10 mA from 0.05 to 10 A
îČ1.5% of the reading for higher values.