Definite Purpose Contactors. Definite Purpose Contactors (DPCs) are a type of contactor designed for specific applications, such as lighting, HVAC, air conditioning, refrigeration, and heating systems. They are typically used in commercial and industrial settings where reliable and efficient electrical control is needed.. Contacts perform the current carrying function in a contactor. 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.
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Depending on the type of the contactor, the coil can also work with AC voltage. For example, the contactor's coil may work with a 24, 120, or 220-volt AC power. So before connecting the wires to the coil, you first need to check the coil voltage. Most of the contactors, like the one we have here, work with a 24-volt DC power. 2) Contacts.. Contactors are heavy-duty electromagnetic switches that are normally used in controlling large lighting loads and motors. They operate similar to relays, bu.
