Control Relays

We offer three types of control relays from a range of brands including Phoenix Contact, ABB, Siemens and Omron.

If you're looking to control temperature, voltage, current or frequency, you'll find the products within monitoring relays. For all of your signal conditioning and conversion requirements, visit our signal conditioning range.

What is a control relay?

A control relay is basically an electrically operated switch.

How does a control relay work?

They work by opening and closing a switch to allow power to flow through a coil to conduct electricity. The coil does not actually come into contact with the switch during this process.

What types of control relays are available?

The three types of control relay are as follows:

  • Impulse relay - a type of latching relay that transfers the contacts with each pulse.
  • Monitoring relay - a protective control device for monitoring and receiving input signals, and outputting an alarm signal if a threshold is reached.
  • Signal conditioning - a device that converts one type of electronic signal into another type of signal.

What are the uses of a control relay panel?

Control relay panels are used for the control and monitoring of electrical equipment such as transformers, generators and circuit breakers in industrial systems and environments.

What is the function of an undervoltage control relay?

A relay will trip the breaker circuit if it detects an abnormality. An undervoltage (UV) relay will activate if the voltage is lower than a prescribed value, and stay like that until it reaches the necessary voltage.

Guides & Articles

article1_image

In our definitive guide, we look at what flow switches are, how they work and what they’re used for, as well as the different types that are available.

article1_image

In our comprehensive guide we look at what thermocouples are, what they’re used for, as well as the different types that are available.

Related Products
Output contacts 8A 250V ac/24V dc latching/non-latchingLow/high setting ...
Description:
Output contacts 8A 250V ac/24V dc latching/non-latchingLow/high setting fail safe tripping modesAdjustable hysteresis (2 or 10% of set level)100ms or 1 second tripping time delay (selectable)LED indicationDimensions: H89 x W35 x D59mm.
Designed for monitoring 3 phase suppliesFour-wire version available ...
Description:
Designed for monitoring 3 phase suppliesFour-wire version available (Neutral loss)LED indication of supply and relay status Trip level adjustment to set relay switchover point to take into account, or ignore, a regenerative voltage.
Adjustment for upper and lower trip levelsMonitors own ...
Description:
Adjustment for upper and lower trip levelsMonitors own supplyUser-selectable nominal voltage: 24/115/230 V acTime delay (from fault) with adjustable setting"Power On Delay" (Td): 2 sLED indication for supply and relay statusDimensions: H78 x W45 x D99 mm.
Detects under and over-voltage conditionAdjustment for under and ...
Description:
Detects under and over-voltage conditionAdjustment for under and over trip levelsAdjustable hysteresisMonitors own supplySeparate relays for under and overTime delay: 200 ms (from fault)2 x DPDT relay output 8ALED indication for supply and relay statuses70 mm housing, DIN Rail or ...