DevicesContactor vs Control Relay: Difference between Contactor and Control Relay

Contactor vs Control Relay: Difference between Contactor and Control Relay

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Contactors and Control relays are electrically run switches utilized for switching of lots and for managing the electric circuit respectively. Generally the tool of quenching of arc is air, so they are called air break contactors & & air break control relays. Given that both he changes are made use of in same control panel, so it is perplexing for the people to comprehend the difference in between a contactor as well as control relay.

What’s resemblance in between a Contactor and also a Control Relay?

Contactor and Control Relay work on exact same principle. They are essentially electrically run solenoid buttons that are made for the switching or regulate the tons. Both of them are built in a similar method:

  • Both, contactor and control relay, have a top housing which real estate set have actually established open usually normally closed usuallyShut The lower housing in both instances, have a collection of magnet as well as coil with outside cover to protect all the interior components.

What’s the difference in between a Contactor and also a Control Relay?

The essential difference in between control relays as well as contactors is the ranking of present that they are created to manage. Contactors are used for lots that have somewhat greater currents as well as higher system voltages.

Right here’s a short meaning of Contactor & & Control Relay that will aid you recognize the essential distinction in between both:

Control Relay: It is a tool via which get in touches with in one circuit are operated by an alteration in conditions in the same circuit or in associated circuits.

Contactor: It is a device which is made use of for continuously establishing and also disturbing an electric circuit under normal conditions.

Listed below table highlights 4 significant distinctions between a Contactor as well as a Relay:

Criteria Control Relay Contactor
1 Dimension of the Device Control Relays are fairly smaller or exact same in size (upto contactor ranking of 12A) Contactors are larger in dimension when contrasted to Control relays
2 Current Switching Capacity Control Relays are usually categorized as bring lots of 10A or less A Contactor would be used for tons higher than 10A
3 Application Control Relay is a lot more generally utilized in control circuits which are solitary stage circuits. Contactors are commonly developed for switching over 3-phase lots.
4 Supporting Contacts A Control Relay is composed of at the very least 2 NO/NC calls A Contactor consists of a minimal one trine phase power contacts as well as sometimes extra in constructed complementary get in touches with are also provided.
5 Open/Closed Contact Standards Control Relays can as well as typically are both Normally Open and/or Normally Closed depending on the desired feature. Contactors, on the other hand, are nearly exclusively developed to run with typically open (Form A) calls.
6 System Voltage Control Relays are typically ranked to just 250V Contactors are generally ranked for approximately 1000V

Below are a few other requirements that actually distinguish both gadgets:

Safety Features

  • Spring-Loaded Contacts: Contactors are designed to bring high current, as well as thus have extra safety and security attributes like spring-loaded contacts to ensure that the circuit is broken when de-energized– stopping the circuit from being stimulated when it is intended to be off, springtime packed get in touches with additionally protects against the contact bouncing which lead to long life of get in touches with. Since Control relays are created for lower power, spring-loaded calls are not so usual.
  • Arc Suppression: Due to the high loads contactors normally bring, they contain arc suppression to appease the arc faster. As Control relays aren’t developed for high loads, arc suppression is not typical on Control relays.

Choosing Between Contactors and also Control Relays for Application

When choosing in between a contactor and also a Control relay; constantly take into consideration some vital factors.

When to Use a Control Relay When to Use a Contactor
1 10A or much less present 9A or even more current
2 1 stage 1 or 3 phase
3 Approximately 250VAC Approximately 1000VAC

At C&S Electric, we create and produce robust as well as flexible array of contactors as well as Control relays that are developed utilizing modern-day technologies to provide full protection and also security with lengthy mechanical and electric life. We provide a series of high integrity Contactors and Control Relays consisting of RobusTa Contactors & & Overload Control Relays, Mini Contactor, D-Range Contactors, 2 Pole & & 4 Pole Contactors, exceeD Contactors, Robusta2 Contactors, Capacitor Duty Contactors and also Definite Purpose Contactors.

Michal Pukala
Electronics and Telecommunications engineer with Electro-energetics Master degree graduation. Lightning designer experienced engineer. Currently working in IT industry.