PUMP MOTOR WITH BRUSH-LIFTING DEVICE

HIGH-OUTPUT ELECTRIC MOTOR specialist, Menzel Elektromotoren has built, installed and commissioned a pump motor equipped with a short circuiting and brush-lifting device.

The three-phase slip-ring induction motor drives the peak load pump for Baden-Württemberg state water
supply, a German special-purpose association. Due to the brush-lifting device, the motor carbon brushes
are only used during motor startup and then lifted off the slip rings. This minimises wear and tear and allows significantly longer maintenance intervals because the brushes no longer need to be replaced regularly and the slip ring compartment rarely needs to be cleaned of carbon dust. 

In addition to a slip-ring motor with brush lifting, the scope of supply also included a motor base frame, coupling, liquid starter and cabling to the nearest switchgear. The size 800 motor with a nominal output of 6200kW at 5000V nominal voltage drives the peak load pump in the summer months and is becoming increasingly important due to climate change and higher daily water requirements.

Menzel fully tested the motor in the customer’s presence and then installed it and put it into operation at the waterworks. By replacing the original motor from 1969, the customer has ensured the reliable continued operation of the plant for the future.