A lighting contactor is a special contactor that is used only for control lighting installations. The contact ratings are incandescent rating and not to be used for motor control. The contactor allows banks of lights to be controlled by one device. The controlling devices could be switches, computers or photocells to bring the lights on at any preset times.
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A Contactor used to supply the Power to the lights
When the load current is higher than 15 Amps.
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).
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.
metres
No, you definitely cannot.
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.
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).
A contactor is an electrically controlled switch (relay) used for switching a power circuit. an electro pneumatic contactor is similar to the above except it uses a pneumatic signal to initiate the switching of the electric power circuit. an electro magnetic contactor is a contactor driven by an electric control signal. It us usually just called a contactor.
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.
If lighting is required on condominium property, the association is responsible for lighting. The city is responsible for lighting streets -- i.e., street lighting, not for lighting properties.
240 or 415
if a stairway has more than six treads lighting is required at the
In this type of situation, where there is more than one lighting circuit, a lighting contactor would be used. These types of contactors can be obtained in four and five pole configurations. Make sure that the contactor is rated for lighting loads and not motor loads. A normal switch, single pole single throw, would be used to switch the contactors on and off. A single switch could then be used to control as many contactors as you need to operate the lighting circuits.If there is just one lighting circuit, the total circuit amperage must be known, then the switch would be sized to the amperage of the circuit.
The timer is used to give the motor time to reach its running speed at the star voltage. Once the timer times out the star contactor drops out and the delta contactor pulls in.
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.
The first thing that springs to mind is that the pole faces of the contactor are dirty. If the contactor is in a position where it can get weathered, it would probably be a rust built up. Dis assemble the contactor and emery cloth the pole faces until they are shiny again. A light wiping of oil will increase the time between cleanings. If the sound is more like a chatter then the shading coil on the contactor's pole face could be cracked or broken. This small copper coil is used to induce magnetism into the pole face to hold the contactor closed as the voltage transits through the zero voltage of the sine wave cycle.
yes
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.