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VDF-10
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Relays in which the output contact actuation depends of the values of an external signal (voltage, current, control), that can be independent to the auxiliary supply.
 
     VDF-10, VDJ-30: Surveillance relays of the the trip circuit of a one pole or three pole circuit breaker, respectively.
     UJ-2: Instant, Vdc or Vac voltage measuring relay.
     RJS-4: Electronic relay for tripping and local and remote signaling with 4 alarm points.