Control Relays Control Relays It is a device through which contacts in one circuit are operated by an alteration in conditions in the same circuit or in associated circuits. Categories: control relay, SwitchGear Electricals Tag: control relay Enquire Now Related products Power Quality Solutions ( Power Capacitors) Read more Moulded Case Circuit Breaker (MCCB’s) Read more On Delay Timer Read more Air Circuit Breakers Read more