What is an auxiliary contactor?
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What is an auxiliary contactor?
Basically, an auxiliary contactor is a regular (low-power) relay – but built like a “regular” contactor and when used together with another contactor it is called auxiliary contactor to clarify that it is not used for switching loads but has an activation/deactivation or control function instead – used to connect/ …
What is a power contactor?
A contactor is an electrical device which is used for switching an electrical circuit on or off. These contacts are in most cases normally open and provide operating power to the load when the contactor coil is energized. Contactors are most commonly used for controlling electric motors.
What is the difference between contactor?
Relays are used to control contacts of an electrical circuit due to a change of parameters or conditions in the same circuit or any other associated circuit. Contactors, on the other hand, are used to interrupt or establish connections in an electrical circuit repeatedly under different conditions.
Is the auxiliary contact designed for power or control purposes?
Main Contacts VS Auxiliary Contacts An electrical contactor completes its main function using its main or power contacts whereas auxiliary contacts only used for control circuits, indicator circuits, or feedback circuits.
What are the different 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.
How do I choose a contactor size?
As per above chart:
- Type of Contactor = AC7b.
- Size of Main Contactor = 100\%X Full Load Current (Line).
- Size of Main Contactor = 100\%x6 = 6 Amp.
- Making/Breaking Capacity of Contactor = Value above Chart x Full Load Current (Line).
- Making/Breaking Capacity of Contactor = 8×6 = 52 Amp.
Do relays have auxiliary contacts?
The auxiliary contact is often used in a relay logic circuit, or for some other part of the motor control scheme, typically switching 120 Volt AC power instead of the motor voltage. One contactor may have several auxiliary contacts, either normally-open or normally-closed if required.
Why use an auxiliary contactor?
Auxiliary Contacts in Contactor Auxiliary contacts also called helping contacts which used for control, indication, alarm, and feedback circuits. Generally, in a contactor both NO(Normally Open) and NC(Normally Closed) contacts available. Auxiliary contacts are mainly designed to work with low voltage and low current.
What are the types of contactors?
What is the difference between a contactor and a 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.
Which is better relay or contactor?
Control Relay is more commonly used in control circuits which are single phase circuits. Contactors are typically built for switching 3-phase load….Contactor vs Control Relay: Difference between Contactor and Control Relay.
| When to Use a Control Relay | When to Use a Contactor | |
|---|---|---|
| 3 | Up to 250VAC | Up to 1000VAC |
What is the difference between an auxiliary contactor and main contactor?
This is to clarify that it is not used for switching loads but has an activation/deactivation or control function instead. Auxiliary contactor is used to connect/disconnect a circuit (i.e to control power contactors). Auxiliary contactors usually only have auxiliary contacts and no main contacts.
What are auxiliary contacts in electrical power wiring?
In Electrical Power wiring we use different types of relays and contactor/motor starters and these have some contacts which we know with names of main contacts and coil contacts but this is not an end we have also other contacts which we known with the name of auxiliary contacts.
How many power contacts are there in a contactor?
The number of power contacts in a contactor depends upon its Pole rating means in a two-pole contactor there are two main contacts whereas in a three-pole contactor there are three main contacts. Main or power contacts are NO (normally open) contacts means they will make contacts only when the magnetic coil of the contactor is energized.
How many types of contacts are there in auxiliary contacts?
Now one thing more in every Auxiliary contacts we have two types of contacts in which NC and NO.