5-176 B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS CHAPTER 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 5-92: Time overcurrent logic
5.6.7 End fault protection
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) END FAULT PROTECTION 1(24)
TOC1 TD MULTIPLIER:
1.00
Range: 0.00 to 600.00 in steps of 1
TOC1 RESET:
Instantaneous
Range: Instantaneous, Timed
TOC1 BLOCK:
Off
Range: FlexLogic operand
TOC1 TARGET:
Self-Reset
Range: Self-Reset, Latched, Disabled
TOC1 EVENTS:
Disabled
Range: Disabled, Enabled
END FAULT
PROTECTION 1
EFP1 FUNCTION:
Disabled
Range: Disabled, Enabled
EFP1 CT:
F1
Range: Available current channels
EFP1 PICKUP:
1.200 pu
Range: 0.020 to 30.000 pu in steps of 0.001
EFP1 BREAKER OPEN:
Off
Range: FlexLogic operand
EFP1 BKR DELAY:
0.400 s
Range: 0.000 to 65.535 s in steps of 0.001
EFP1 MANUAL CLOSE:
Off
Range: FlexLogic operand
EFP1 PICKUP DELAY:
0.040 s
Range: 0.000 to 65.535 s in steps of 0.001
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