Vt Failure - GE 750 Instruction Manual

13 S6 MONITORING
The 750/760 detects a VT fuse failure when there are significant levels of negative sequence voltage without
correspondingly significant levels of negative sequence current measured at the output CTs. Also, if there is
not a significant amount of positive sequence voltage when there is positive sequence current then it could
indicate that all the VT fuses have been pulled or the VTs have been racked out. The setpoints are as follows.

VT FAILURE

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VT FAILURE
FUNCTION: Disabled
VT FAILURE
RELAYS (3-7): -----
VT FAILURE
DELAY: 10 s
GE Power Management
Courtesy of NationalSwitchgear.com
The VT Failure setpoints path is:
\ SETPOINTS \ S6 MONITORING \ EQUIPMENT \ VT FAILURE
Range: Disabled, Alarm, Latched Alarm, Control
Select the required function.
Range: Any Combination of the 3-7 AUXILIARY Relays
Select the output relays required.
Range: 0 to 60000 in steps of 1 s
Select the delay required.
750/760 Feeder Management Relay
13.8 EQUIPMENT
13.8.6 VT FAILURE
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