RR – Rapid Auxiliary Relay
he function of the Rapid Auxiliary Relay – RR is to multiply a signal into several independent contacts without a substantial time delay in its transmission.
The importance of the response time may be noticed, for instance, when the relay is used in protection systems for power transformers, where a small delay in the emission of a trip signal may increase the damages caused by an internal failure.
The RR is provided with 4 reversible contacts with operation time <2.5 ms, capable of switching DC and AC.
A LED light on the RR front panel indicates when the output contacts are actuated.