What are lighting contactors?
Lighting contactors are relay switches that control the flow of electricity through a circuit powering the lighting in a given area. They exist remotely and control circuits with higher voltages which can be dangerous to the operator, if controlled directly.
What is the function of contactor?
A contactor is an electrically-controlled switch used for switching an electrical power circuit. A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch.
How do you size a lighting contactor?
There are 5 primary things to consider when determining how to size a contactor for your application:
- Full Load Amperage at Line Voltage. The first item to consider is the load, which is measured in amperes.
- Contactor Coil Voltage.
- IEC Utilization Categories.
- Reversing vs Non-Reversing Contactors.
- Auxiliary Contacts.
What is difference between contactor and relay?
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.
What is the difference between MCB and contactor?
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. A circuit breaker does the protecting. Contactor works under normal situations.
What are the different types of contacts in 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 a slight variant of contactor?
A slight variant has multiple contacts designed to engage in rapid succession. The first to make contact and last to break will experience the greatest contact wear and will form a high-resistance connection that would cause excessive heating inside the contactor.
What is a lighting contactor?
The lighting contactor is a special type of contactor that can be used individually for simple control schemes or as integral components in full-featured lighting control systems. It provides reliable and efficient means of local or remote switching of lighting as well as non-inductive loads.