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CFVB Voltage-balance Relay - Legacy

CFVB Voltage-balance Relay

Manufacturing for CFVB has been discontinued. As an alternative, please refer  to P14D or VT supervision function in 8 Series, P40 Agile, MiCOM or UR.

Undervoltage Phase-fault Detection is provided by the Type CFV12 relay and is used in preference to the Type ICR when high-speed operation is desired. The drop-out on a phase-to-phase fault will be approximately 20 percent lower than the calibrated dropout on a 3-phase fault. Where more accurate fault detection is required, it is recommended that three single-phase Type CFV16A relays be used. They will have the same dropout on single-or three-phase faults.