Technical Specifications; Protection - GE F650 User Manual

2.5 TECHNICAL SPECIFICATIONS

2.5 Technical specifications
TECHNICAL SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

2.5.1 Protection

Phase and Ground protection functions use currents measured through CT inputs for performing internal calculations,
while the Neutral protection functions use the current calculated from three phase currents.
The sensitive ground protection functions are usually used for applications where the neutral is completely isolated. These
functions use current measured though the sensitive ground current input. This CT has a sensitivity 10 time higher than
standard CT inputs (Connected to 1A and 5A CT) and its current withstand is lower.
PHASE TIME OVERCURRENT (51PH/51PL)
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
Dropout Level:............................................................................97% to 98% of the pickup level
Level Accuracy: .........................................................................values at nominal frequency:
Curve Shape: ..............................................................................IEEE extremely/very/moderately inverse
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% of operate time or 50 ms
Voltage Restraint: .....................................................................selectable by setting
Saturation Level: .......................................................................48 times the pickup level
Snapshot Events: ......................................................................selectable by setting
2-8
±0.5% of the reading ± 10 mA from 0.05 to 10.00 A
±1.5% of the reading for higher values
IEC A/B/C/long-time inverse/short time inverse curve
IAC extremely/very/moderately inverse
ANSI extremely/very/normally/moderately inverse
2
t
I
Definite time
Rectifier curve
TM
FlexCurve A/B/C/D user curve
(whichever is greater)
F650 DIGITAL BAY CONTROLLER
CHAPTER 2: PRODUCT DESCRIPTION
GEK-113000-AF