Thermal overload relays for Power contactors

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Thermal overload relays

Elettra prrovides a complete line-up of thermal overload relays, designed to ensure effective protection of electric motors against overloads and phase failure. Thermal overload relays for mini-contactors are used for overload and phase failure protection in combination with mini-power contactors and power contactors. BK thermal overlaod relays for power contactors are designed to protect against overload and phase failure in combination with contactors. They are equipped with auxiliary contacts (1NO + 1NC) that allow direct connection to the contactor control coil. On the front of the device there is a trimmer for adjusting the trip current and a selector switch that allows you to choose between manual or automatic reset. For applications requiring high starting currents, BWK heavy-duty thermal overload relays are available. These devices cover a wide current range, from 2.5 A to 850 A, offering class 30 overload protection and phase failure protection. They also include 1NO + 1NC auxiliary contacts on board. On the front of the device there is a trimmer for adjusting the trip current and a selector switch that allows you to choose between manual or automatic reset.

Range of current	from 0,12A a 850A, different depending on the model considered
Nominal operating voltage	690VAC / 1000VAC depending on the models considered
Application	thermal protection against overload and phase failure
Available types	for mini-contactors, contactors and heavy-duty starters

Line-Up Advantages

Thermal overload relays are devices designed to ensure effective protection of electric motors, contributing to the proper functioning of equipment and preventing failures. They represent a reliable and economical solution, suitable for a wide variety of industrial applications.

International Certifications

Certified UL and CSA

Maximum efficiency

The B..N line-up of thermal relays guarantees excellent operating performance in both cold and hot environments, thanks to internal temperature compensation.

Complete Line-Up

Products are available with a current range from 0.12 to 850A depending on the model; in particular, products from 2.5 to 850A are suitable for heavy starting, offering flexibility and adaptability for motors of different power ratings.