Manual Motor Starters are electromechanical protection devices for switching electrical motors ON/OFF manually. They enable you cost- and space-saving fuseless protection against thermal overload, short circuit, and phase failures.
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Top-quality manual motor starters for ultimate protection
Our portfolio of the manual motor starters (also known as manual motor protection circuit breakers or manual motor protectors) includes an extensive variety of devices. They feature a compact, space-saving design, simple connecting links and setting range from 0.16 A up to 32 A.
You can choose from the top-of-the-class products from the renown companies:
The manual motor starters integrate circuit breaker and overload relay functions. They enable you to reduce machine downtime, trouble shooting and maintenance expenditures by protecting your motors.
Their main benefits are:
harmonized main accessory range (auxiliary contacts, signal contacts, shunt trips and undervoltage releases),
efficient planning and installation,
simple connecting links ensure electrical and mechanical connection to build direct-on-line starters,
push-in spring terminals offer unique, fast, easy, and reliable connections,
protection from automatic restart in combination with under voltage release.
Protect, isolate, and control electrical motors
Electrical motors should be protected against overloads and short circuits. Moreover, they should be isolated from the main supply. In the combination of the manual motor starter and contactor, the former provides the protection and isolation functions.
After detecting an overload or short circuit, the manual motor starter disconnects all phases from the supply, isolating the motor from the supply. By reacting very quickly manual motor starters also increase the device’s reliability. They protect load-side circuits against damage.
Check the main features of manual motor starters
Manual control of electrical motors, short-circuit current and overload protection
Adjustable current setting for overload protection and magnetic trip indication
Remote control via undervoltage release or shunt trip
Short-circuit service breaking capacity (Ics) up to 100 kA
Setting Range 0.16–32 A, with overload- and instantaneous short-circuit release
Use manual motor starters in various applications
You can benefit from the manual motor starters, as a reliable, cost-efficient solution for motor protection, in many industrial applications such as:
Auxiliary contacts remotely indicate the state of the contacts in the starter. They can be used for relaying, electrical locking or signalling. They change position with the main contacts of the manual motor starter, opening/closing a separate circuit depending on the position of the device.
Auxiliary contacts are available as normally open or normally closed contacts.
Under voltage release opens the motor starter when the control voltage drops below the trip threshold. It releases the manual motor starter or prevents it from being switched on when its voltage supply is interrupted. You can use it in emergency switching circuits or for preventing an automatic restart after voltage interruption.