High-quality medium-voltage motors

These large industrial motors are available up to 40,000 kW and are operated with medium voltage.
These are usually custom-made engines manufactured according to customer specifications.
Their number of pole pairs ranges from 2 to 20. Protection ratings are available in the IP23, IP55 to IP65 range.

Medium-voltage motor with air cooling

Medium-voltage motors – Cooling methods

IC 411, fin-cooled
IC 611, with air-to-air heat exchanger
IC 81 W, with air-to-water heat exchanger
IC 01, cross-ventilated

Slip ring rotor – medium voltage motor

Common nominal voltages

Medium-voltage motor with tube cooling

Exams

The following engine tests are optionally carried out at the factory:
High-voltage testing, rotation direction check, winding resistance measurement, insulation resistance testing,
No-load test, short-circuit test, vibration measurement, shaft voltage measurement, functional test
of the accessories, noise measurement, visual inspection and documentation. If required, full load testing,
Heating test, shock impulse test and loss factor measurement possible.

 

 

 

Rib-cooled medium-voltage motor with terminal box on top

 

 

 

 

Engine protection/monitoring

The high-quality medium-voltage motors can be equipped with temperature monitoring for windings and bearings.
to be supplied, e.g. 6 × Pt100 resistance thermometers in the stator winding as well as 2 × Pt100
Resistance thermometers in the A- and B-side bearings. The thermometer connection terminals
are housed in a separate terminal box. Additionally, a wide range of other options is available.
Sensors are available upon request. The motors are mostly supplied with a standstill heater.