Alstom MVAP22 Voltage Selection Relay

Alstom MVAP22 Voltage Selection Relay
The MVAP 22 is essentially a fuse
failure relay with changeover output
contacts enabling its use for either
voltage selection or fuse failure
protection. A typical application as
a voltage selection relay is the
automatic connection of metering
equipment to an alternative supply if
the normal or preferred supply fails.
As a fuse failure relay it will monitor
the output of a voltage transformer
and give an alarm or disconnect
protection circuits for VT fuse failure