What is an auxiliary contactor?
Basically, an auxiliary contactor is a regular (low-power) relay – but built like a “regular” contactor and when used together with another contactor it is called auxiliary contactor to clarify that it is not used for switching loads but has an activation/deactivation or control function instead – used to connect/ …
Are auxiliary contacts normally open?
Auxiliary contact is available in various versions as normally open (NO), normally closed (NC), or changeover (C/O). It can be available internally on a device or can be mountable. Multiple auxiliary contacts can be mounted to electrical devices. Many protection or control devices have additional auxiliary contacts.
How do I get rid of auxiliary contacts?
Grasp the contactor with your left hand. Put the thumb of your right on top of the aux contact and your first two fingers under the bottom of the aux contact. Using your thumb only, pull the top of the auxiliary contact slightly away from the contactor approximately .
What are the ratings of auxiliary contacts?
Auxiliary contacts are rated A600 for AC voltages and P600 for DC voltages as shown below: A600 is rated 10 amp maximum continuous carrying current with maximum make volt-amp rating of 7200 VA and maximum break volt-amp rating of 720 VA.
Why use an auxiliary contactor?
Auxiliary Contacts in Contactor Auxiliary contacts also called helping contacts which used for control, indication, alarm, and feedback circuits. Generally, in a contactor both NO(Normally Open) and NC(Normally Closed) contacts available. Auxiliary contacts are mainly designed to work with low voltage and low current.
What is the contact rating of a relay?
2. Contact Specification. Contact ratings are the standard values for guaranteed relay performance and generally indicates the current rating of the relay contacts. The rating varies depending on the voltage applied and the types of electrical loads.
What is the difference between load contacts 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.
What are auxiliary contacts?
Auxiliary contacts work with primary switching equipment like circuit breakers, relays and contactors, serving as interlocks or retainers and often indicating the device’s operational status.
What are the different types of auxiliary contactors?
There are two basic auxiliary contact types: those that are closed in the non-activated state or those that are open. These are known as normally closed (N/C) and normally open (N/O) contacts. The N/C contacts are, for example, used as electrical interlocks where two contactors are used for forward/reverse operation.
What are main contacts?
Main contacts are the contacts in the main circuit that conducts the current when closed. They are designed to switch different types of loads (motors, heating systems, lighting, capacitors, etc.) with different rating data (power, current, voltage) over a suitable lifespan. Main contacts carry large currents.
