Bank Phase Undervoltage Settings - GE C70 Instruction Manual

SETTINGS EXAMPLE
Based on the manufacturer overvoltage data outlined, three overvoltage trip stages are applied using a factor of 0.9 for
the stage pickup overvoltage levels and half of the allowable time outlined.
The following setting values are programmed in the EnerVista UR Setup software.

8.4.8 Bank phase undervoltage settings

8
Bank undervoltage protection is required to take bank out-of-service when the supply bus voltage is lost. The pickup
setting is specified as 0.7 pu with a time delay of 1 second, based on maximum fault clearing time. The bank undervoltage
element is blocked during VT fuse fail conditions.
The following setting values are programmed in the EnerVista UR Setup software.
8-20 C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
CHAPTER 8: APPLICATION OF SETTINGS
Eq. 8-27
Eq. 8-28