8-20 C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
SETTINGS EXAMPLE CHAPTER 8: APPLICATION OF SETTINGS
8
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.
Eq. 8-27
Eq. 8-28
The following setting values are programmed in the EnerVista UR Setup software.
8.4.8 Bank phase undervoltage settings
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.
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