Engine Protection Switches

ABB Electrification

Motor protection switches are electromechanical protection devices for the main circuit. They are mainly used to manually ON/OFF motors and provide unfused protection against short circuit, overload and phase faults. Fuseless protection provides a quick response in short-circuit conditions, saving cost and space and shutting down the motor in milliseconds. Starter combinations are set together with contactors.

Main benefits

MS1xx and MO1xx family harmonized range of main accessories (auxiliary contacts, signal contacts, trip releases and undervoltage releases)

compact design

Efficient planning and installation in line with ABB's contactor family

Simple connections provide electrical and mechanical connection to install direct on-line starters

Protection of motors, less trouble, less downtime

Reducing maintenance costs by protecting engines

Main features

Manual control/short circuit current and overload protection

Adjustable current potentiometer and magnetic trip indicator for overload protection

Separation function

temperature compensation