When it comes to electric circuits, they cannot function properly without an electrical contactor. Small and simple, this component is essential: it ensures the safety of system and prevents short circuits. PartzStop catalog is full of basic contactor models from the most well-established manufacturers, such as Carrier, Lennox, Rheem, and others.
What Is an AC Contactor?
There’s a common misunderstanding of the difference between relays and contactors. The first one is used to operate in the change of conditions in a single or several circuits. The second one is used to operate in the circuit (establish, interrupt, etc) under normal conditions.
Contactors can function under a higher load (more than 10A). They are created to work with normal (open) contacts without connection. Also, they are compatible with auxiliary contacts that render extra functions depending on the control required.
They perform a lot of safety functions, as well. For instance, contactors are required for arc suppression since they withstand a higher load than relays. They protect against overloads and typically interrupt into the circuit wen the current exceeds limits within 10-30 seconds.
When one needs a contactor? They are typically used in 3-phase applications and connect two poles with a united circuit between them. Also, they are designed for operating under 1000V, which makes them perfect for industrial use.
How to select a right HVAC Contactor?
When in search of a suitable device, pay attention to the following aspects:
- Where it will be utilized? Check the IEC standard to find out the appropriate utilization category. It defines the design and construction of a model.
- What’s the motor inrush current? It should be rated specifically for the AC-3 load type.
- What’s the supply voltage? The majority of 3-phase circuits in industrial units have 400 V supply while others have 110 V.
Where to get this information? First, you should check the motor’s nameplate where voltage and power are specified. Secondly, find the datasheet provided by the manufacturer and select the guideline for the load type. Note that loads are often divided into categories (AC1, AC2) – make sure the categories of a motor and contactor coincide.
If you need a reliable and efficient contactor, explore PartzStop catalog – there’s an extensive choice of models for residential and industrial use. You can check the contactor price and its features, all mentioned in the ample description.
Want professional help with selection? Our customer support team is always in touch. We will provide you with guidance and figure out the models with the best price/quality ratio.