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A contactor is another name for an electrical relay. It is a device that allows a low current (normal) switch to turn on or off high current equipment such as heaters or air-conditioners that would be well beyond its capacity.
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoIn a motor circuit to stop and start a motor from a remote position and to provide under voltage protection to the circuit. A lighting contactor allows multiple circuits of lighting loads to be switched on from a single location.
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Definition of coil in contactor?
The coil in a "Contactor" is essentially an electromagnetic coil that provides the driving force to close the contacts in a Contactor. When the "Coil" is energized by a lower control voltage usually from some type of controller such as a PLC, the Normally-Open contactor will close or in the oposite case, the Normally-Closed contactor will open.
How many main line contactor assemblies are used in an across the line AC reversing motor control?
2
What causes an electrical contactor to make a buzzing noise when activated and what should be done about it?
Contactor chatter can be caused by a broken shading ring winding on the pole face of the contactor. Low voltage to the coil can be another reason for contactor chatter. A constant hum on a contactor will be caused by misalignment to the two pole faces. Check for rust building up on the two surfaces.
Which side of a motor contactor should the overload contact be placed?
On the load side of the contactor. T1,T2,T3.
What is the difference between a motor starter and a contactor?
Motor started will have overloads the contactor connect es line voltage.
How is a Blowout coil connected?
A blowout coil connected in series with contactor's auxiliary contacts that shunt around the main contactor contacts. The coil is out of the circuit when the main contactor contacts are closed and in the circuit when the main contactor contacts are open.
What are the parts of magnetic contactor?
There are three main parts of a magnetic contactor. These include the power contacts, contact springs, and the auxiliary contacts.
What is the difference between main contactor and axualiary contactor?
The load contactor is what the motor load is usually connected to. The auxiliary contacts are usually used in the stop start remote wiring to seal the mag in. Auxiliary contacts are also used to transmit the status of the contactor to a PLC.
How many main - line contactor assemblies are used in an across the line AC reversing motor?
2
How does magnetic contactor operate?
explain me about the contactor works with examples. if i want to control a motor with contactor. and how i can use contactor in loops with over load and circuit breakers.
How do you calculate contactor capacity of star contactor?
metres
What is the difference between an definite purpose contactor and a lighting sontactor?
A definite purpose contactor is designed (and rated) for a specific load. So a lighting contactor is one example of a definite purpose contactor. A motor starter contactor is another example. So, a lighting contactor is a definite purpose contactor, but a definite purpose contactor is not necessarily a lighting contactor (it might be a motor starter, for instance).
What is the function of contactor?
A contactor is used like a switch. It is used to open and close the circuit it is in series with by electrically energizing and de-energizing the holding coil of the contactor. By having this adaptability the circuit can be remotely operated from a distance and the operator does not have to be in close proximity to the circuit. Contactors are used to remotely operate banks of lighting and of course the contactor is used for motor control. On contactors that control motors an additional overload block is added to the bottom side of the contactor to protect the motors if they get into an over load condition. The N.C. contacts in the overload block will open and the holding coil of the contactor will de-energize and drop the motor off line.
Can you use an AC contactor in the place of DC contactor?
No, you definitely cannot.
What is no volt coil?
no volt coils are used to de-energise a contactor should a situation arise in which voltage is zero
What components can be changed on a contactor and a starter for rebuilding purposes?
Various components can be added and removed from a contactor. Auxiliary contacts can be inserted in front of the main contacts, as well as a time relay in the case of motor starters (star/delta starter). Usually you should fit a overload relay when you use the contactor in a motor starter, this is inserted in the main contacts at the bottom. However, the internal components like the coil may never be changed or replaced.
What is the function of main engine?
Main propulsion is the function of the marine main engine.
