Motor circuit breakers

In the Onninen electrical wholesaler, a wide range of devices for power supply, control and protection of electric motors awaits professionals. In this category you will find motor switches. These devices are responsible for disconnecting the power supply to the motor in the event of an overload or other threats. See the available products and their parameters and choose the right thermal switch for your application.

Principle of operation of the motor switch

Motor switches belong to the group of switches. They are used to connect, protect and separate current circuits with a load. They protect motors against the effects of overload, short circuit, blocked start or lack of one phase in three-phase installations. In the event of detecting a phase loss or another of the previously mentioned threats, the motor switch immediately cuts off the power supply, minimizing the risk of irreversible damage to the motor. Additionally, it ensures the safety of the entire electrical circuit to which the motor is connected.

Application of motor switches

Motor switches function as short-circuit and overload protection, mainly for low-power electric motors. They are found in many electrical devices. Their use is particularly recommended:

• when starting an electric engine requires more power,
• for devices operating in extreme environmental conditions,
• in situations where there is an increased risk of short circuit, overvoltage or phase failure.

The use of motor switches allows you to optimize the operation of devices, protect valuable equipment from damage, minimize the risk of fire, ensure employee safety more effectively and significantly reduce electricity consumption.

What to consider when choosing a motor switch?

The motor switches available on the market differ in their technical parameters. When choosing, pay special attention to:

• rated current (range),
• power,
• presence of thermal protection,
• phase loss sensitivity,
• number of poles,
• installation method,
• overload release setting range,
• short circuit release setting range,
• IP protection class,
• additional functions,
• dimensions.

The motor switch should exactly match the requirements of the specific application.

Motor switches in the online electrical store Onninen.pl

We offer motor switches from leading suppliers of electrical equipment and industrial equipment, such as Legrand, Abb, Eaton, Eti, LS Electric, Schneider Electric and others. Our range includes motor switches with thermal and electromagnetic releases, with thermal releases and with electromagnetic releases. Most devices provide triple protection: against overload, short circuit and phase failure. There are several hundred products to choose from with different parameters, which makes it easy to find perfectly matched protection solutions for both standard and non-standard devices. Don't know which motor switch to choose? Contact us! Onninen's technical and sales specialists will advise you on the optimal protection of your devices.