GE B90 UR Series, Instruction Manual

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5-114 B90 Low Impedance Bus Differential System GE Multilin
5.5 GROUPED ELEMENTS 5 SETTINGS
5
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

B90 FUNCTION

B90 FUNCTION
is set to "Protection". One TOC element is available
per each CT input.
Figure 5–50: TIME OVERCURRENT SCHEME LOGIC
5.5.7 END FAULT PROTECTION
PATH: SETTINGS

GROUPED ELEMENTS

SETTING GROUP 1(6)

END FAULT PROTECTION 1(24)
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.
 END FAULT

PROTECTION 1
EFP1 FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
EFP1 CT:
F1
Range: Available current channels
MESSAGE
EFP1 PICKUP:
1.200 pu
Range: 0.000 to 30.000 pu in steps of 0.001
MESSAGE
EFP1 BREAKER OPEN:
Off
Range: FlexLogic™ operand
MESSAGE
EFP1 BKR DELAY:
0.400 s
Range: 0.000 to 65.535 s in steps of 0.001
MESSAGE
EFP1 MANUAL CLOSE:
Off
Range: FlexLogic™ operand
MESSAGE
EFP1 PICKUP DELAY:
0.040 s
Range: 0.000 to 65.535 s in steps of 0.001
MESSAGE
EFP1 BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
EFP1 TARGET:
Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
EFP1 EVENTS:
Disabled
Range: Disabled, Enabled
SETTING
TOC 1 FUNCTION:
Disabled = 0
Enabled = 1
SETTINGS
SETTING
TOC 1 CT:
Current Magnitude, |I|
RUN
FLEXLOGIC OPERANDS
TOC 1 PKP
SETTING
B90 FUNCTION:
Logic = 0
Protection = 1
AN
D
SETTING
TOC 1 BLOCK:
Off = 0
TOC 1 DPO
TOC 1 OP
TOC 1 PICKUP:
TOC 1 CURVE:
TOC 1 TD MULTIPLIER:
TOC 1 RESET:
|I| > PICKUP