NORD Drivesystems SK 135E motor-mounted starter

The SK 135E motor-mounted starter from NORD Drivesystems has an extended performance range for the economic distributed implementation of soft-start and reversing functions, for motors from 0.25 to 7.5 kW.

The compact starter integrates motor overload protection through PTC thermistor monitoring, mains and motor phase failure monitoring, I²t monitoring and magnetising current monitoring. The electronic, wear-free switching technology can replace motor circuit breakers, reversing contactors and brake rectifiers, which the company claims can render control cabinets unnecessary in large facilities.

As PTC thermistor connection cables and brake control cables are not required, installing the starter is fast and can save space. When the drives are ordered complete and wired with gearbox, motor and starter, the only assembly required is to tighten the screws and establish the electrical connection.

The soft-start function can reduce mechanical stress by preventing shocks during start-up and braking. A voltage boost can be programmed for applications requiring high break-away torques. Various braking modes are available.

The starter includes four potentiometers and four DIP switches for adjusting important parameters. LEDs signal the operating status. Parameterisation and diagnosis can be carried out via parameter boxes or via a PC using NORD CON software.

The company’s distributed electronics program, which also includes the SK 180E and SK 200E series frequency inverters, provides the benefit of a uniform operation concept.