What is a contactor in PLC?
What is a contactor in PLC?
A contactor is a device that is used to control the supply of a three-phase power supply in an electrical circuit. The contactor’s role is to switch on or off the power supply to its connected output load.
What is the difference between relays and contactors?
A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Additionally, contactors are commonly rated for up to 1000V, while relays are usually rated to only 250V.
What do contactors and relays do?
Contactors and Control relays are electrically operated switches used for switching of loads and for controlling the electrical circuit respectively. Contactor and Control Relay work on same principle. They are basically electrically operated solenoid switches that are designed for the switching or control the loads.
What is the difference between a contactor and a solenoid?
A primary advantage of solenoids is their ability to use a low input to generate a larger output via the coil, thus reducing strain on the battery. The contactor is the relay to use when a circuit must support an even heavier current load (typically 100-600 amps).
What is the main difference between a relay and a contactor and between a contactor and a magnetic motor starter?
Comparison of Relay and Contactors
| Relays | Contactor |
|---|---|
| Relays are switching devices used in any control circuit for checking a condition or multiplying the number of contacts available. | Contactors are switching devices used to control power flow to any load. |
| Relatively smaller in size | Larger when compared to Relays |
What is the difference between contactor and MCB?
Other Important Differences Between Contactor and Circuit Breaker: An electronic contactor is a simple switching device, whereas the circuit breaker is a protective system. The primary function of a contactor is controlling the power. But a circuit breaker works only when a fault occurs.
What are the types of contactors?
There are different types of contacts in a contactor, and they are; auxiliary contact, power contact, and contact spring. The power contact has two types that are; stationary and movable contact. Material for making contacts must have a high welding resistance and stable arc resistance.
What is Timer Relay?
A Timer Relay is a combination of an electromechanical output relay and a control circuit. The contacts will open or close before or after a pre-selected, timed interval. This trigger signal can either be a control switch (dry contact switch) or a power trigger (voltage).
