What are auxiliary contactors?

What are auxiliary contactors?

Auxiliary contacts, also known as auxiliary contactors are electromechanical devices used in conjunction with primary switching equipment such as contactors, circuit breakers, switches, and relays. These secondary switching devices are physically connected to the main switching equipment and work at the same time.

What is the function of an auxiliary contact in a magnetic contactor?

Auxiliary contacts are mainly used to signal switching or malfunction states, for interlocking circuits or logic and sequence controls with low to high loading. Many protection or control devices have additional auxiliary contacts.

What is the difference between load and auxiliary contacts?

Auxiliary contacts are small and are intended to be used as part of the control circuit. Load contacts are large and designed to control a large amount of current. This prevents electrical noise from being transmitted to the control side of the circuit.

How do I know if my contactor is bad?

These bad AC contactor signs may include:

1. Humming. When your AC is on, it may produce a humming sound – but, it won’t power on.
2. Chattering. When the contacts are dirty, or the coil has become weak, you may hear the plunger make a chattering sound.
3. Melting.

What are contacts in a contactor?

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.

What are The AC-1 and AC-3 contactors available?

AC contactors for loads up to 800A (AC-1), 630A (AC-3). 3 or 4 Pole 110V to 415V coil options Aux. contacts available NC2 Series – DatasheetNC2 Series – Certificate

What is the function of the coil in contactor?

The coil provides the driving force in a contactor that closes the contacts. It features a coil wound around an electromagnetic core and thus behaves like an electromagnet. The coil has two parts, a fixed one and a movable part with a spring connecting both parts. This structure creates a spring return mechanism.

What is the difference between a contactor and a relay?

A DC contactor uses a magnetic quenching arc, while an AC contactor uses a grid arc as an extinguishing device. Since contactors and relays are often confused with one another, a contactor vs. relay comparison will help you tell the difference and know which one to pick.