Control Relays & Accessories


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Powertech Controls is a global supplier of high quality electrical components, and is proud to offer the following lines of Control Relays:

ABB CONTROL RELAYS
AEG CONTROL RELAYS
ALTECH CONTROL RELAYS
ATC CONTROL RELAYS
CUTLER HAMMER CONTROL RELAYS
DIVERSIFIED CONTROL RELAYS
DOLD CONTROL RELAYS
EATON CONTROL RELAYS
ELOBAU CONTROL RELAYS
EUCHNER CONTROL RELAYS
FINDER CONTROL RELAYS
FUJI CONTROL RELAYS
GE CONTROL RELAYS
IDEC CONTROL RELAYS
MOUJEN CONTROL RELAYS
MURRELEKTRONIK CONTROL RELAYS
SCHLEICHER CONTROL RELAYS
SCHMERSAL CONTROL RELAYS
SSAC CONTROL RELAYS
SYMCOM CONTROL RELAYS
WAGO CONTROL RELAYS
WEIDMULLER CONTROL RELAYS
WIELAND CONTROL RELAYS

A control relay is a locally or remotely controlled electromagnetic switch that is widely used in all forms of equipment due to its ability to switch higher currents than would otherwise be impossible without it. Control relays, which may be controlled manually or automatically by logic circuits, also electrically isolate the output voltages from the control voltages. The control relay is an electromechanical device that relies on the force of an electromagnetic field. When the relay coil is energized by driving an electrical current above the holding current, the relay contacts move to the second of two positions. For instance, when the relay contact is open, energizing the relay coil will close the contact and vice versa.
 
The normal position of a relay contact is the default de-energized position of the relay. It is either normally open or closed. Using the normally open position is common for applications that power up a load. A normally closed position is usually used for applications that shut down the load. In this case, energizing the relay coil opens the relay contacts.
 
Switches are commonly used in electrical controls. When the load currents require bigger contacts for the switch, manually closing the switch becomes inconvenient and impractical. For instance, switching a fraction of an ampere is fine with simple switches. When bigger currents should be switched, the arching on the switch contacts will damage the switch too soon, more so with motors which are inductive loads. A relay is added to the circuit to build durable high-power switches.
 
Powertech Controls is a distributor of high quality electrical and electronic automation controls and components to the global market. Powertech's friendly, knowledgeable staff is committed to providing attentive service, forming strategic partnerships with our customers and vendors, and continually improving our operations. If you need information that you cannot find, please send a request for quote or contact us.