End Fault Protection - GE B90 Instruction Manual

5 SETTINGS
The Time Overcurrent (TOC) element is provided for backup protection with a choice of inverse time curves. The element is
enabled only when
PRODUCT SETUP
per each CT input.
SETTING
B90 FUNCTION:
Logic = 0
Protection = 1
SETTING
TOC 1 FUNCTION:
Disabled = 0
Enabled = 1
SETTING
TOC 1 BLOCK:
Off = 0
SETTING
TOC 1 CT:
Current Magnitude, |I|

PATH: SETTINGS GROUPED ELEMENTS
 END FAULT
 PROTECTION 1
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The End Fault Protection (EFP) element operates for dead-zone faults; i.e., faults between the CT and an open feeder
breaker. Since a bus protection zone terminates on the CTs, faults between the CT and breaker require special consider-
ation.
GE Multilin
 
B90 FUNCTION B90 FUNCTION
SETTINGS
TOC 1 PICKUP:
TOC 1 CURVE:
TOC 1 TD MULTIPLIER:
TOC 1 RESET:
RUN
Figure 5–46: TIME OVERCURRENT SCHEME LOGIC

SETTING GROUP 1(6)
EFP1 FUNCTION:
Disabled
EFP1 CT:
F1
EFP1 PICKUP:
1.200 pu
EFP1 BREAKER OPEN:
Off
EFP1 BKR DELAY:
0.400 s
EFP1 MANUAL CLOSE:
Off
EFP1 PICKUP DELAY:
0.040 s
EFP1 BLOCK:
Off
EFP1 TARGET:
Self-reset
EFP1 EVENTS:
Disabled
B90 Low Impedance Bus Differential System
5.5 GROUPED ELEMENTS
is set to "Protection". One TOC element is available
FLEXLOGIC OPERANDS
|I| > PICKUP TOC 1 PKP
TOC 1 DPO
TOC 1 OP

5.5.7 END FAULT PROTECTION


END FAULT PROTECTION 1(24)
Range: Disabled, Enabled
Range: Available current channels
Range: 0.000 to 30.000 pu in steps of 0.001
Range: FlexLogic™ operand
Range: 0.000 to 65.535 s in steps of 0.001
Range: FlexLogic™ operand
Range: 0.000 to 65.535 s in steps of 0.001
Range: FlexLogic™ operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5
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