difference between relay and contactor in hindi
What is difference between contactor and relay?
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.
Is contactor a relay?
A contactor is a large relay, usually used to switch current to an electric motor or another high-power load.
Why use a relay instead of a 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. Mainly used in control and automation circuits, protection circuits and for switching small electronic circuits.
What is difference between contactor and circuit breaker?
A contactor is an electrically-controlled switch used for switching an electrical power circuit. ... Unlike a circuit breaker, a contactor is not intended to interrupt a short circuit current. Contactors range from those having a breaking current of several amperes to thousands of amperes and 24 V DC to many kilovolts.
What is NO and NC In Contactor?
NO (Normally Open) is When a Magnetic Contactor has not been given an Electric voltage (Normal state), then this Pole is not connected (Open), then when the Coil on the magnetic contactor is given a voltage then this Pole will be connected (closed). NC (Normally Close)
What is contactor and types?
A contactor is an electrical device which is used for switching an electrical circuit on or off. ... Contactors are most commonly used for controlling electric motors. There are various types of contactors, and each type has its own set of features, capabilities, and applications.
Why contactor is used in motor?
Why are Contactors Used? Contactors are used for high power applications. They allow a lower voltage and current to switch a much higher power circuit, so they are generally larger and more heavy-duty than control relays, enabling them to switch higher power loads on and off for many thousands of cycles (Figure 1).
What is the main function of a relay?
Relays are electric switches that use electromagnetism to convert small electrical stimuli into larger currents. These conversions occur when electrical inputs activate electromagnets to either form or break existing circuits.
What is the difference between AC and DC contactor?
AC contactor adopts a grid arc extinguishing device while the DC contactor adopts a magnetic quenching arc extinguishing device. AC contactor has a large starting current, its maximum operation frequency is about 600 times an hour, while that of DC contactor can be 1200 times an hour.
How do you use a contactor relay?
Control Relay is more commonly used in control circuits which are single phase circuits. Contactors are typically built for switching 3-phase load.
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Contactor vs Control Relay: Difference between Contactor and Control Relay.
| When to Use a Control Relay | When to Use a Contactor | |
|---|---|---|
| 2 | 1 phase | 1 or 3 phase |
What is difference between relay and switch?
The main difference between Relay and Switch is that the Relay is a electrically operated switch and Switch is a electrical component that can break an electrical circuit. ... Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching.
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