New record

Menzel Elektromotoren has delivered its largest low-voltage motor to date - it weighs a whopping 19,800 kg.

The motor drives a cooling water pump in a heating power plant in Venice. Previously, several motors in this application had failed within a short period of time, probably due to unsuitable design. Menzel designed its new motor specifically for the pump application and demonstrated through load tests that it delivers the required performance at the various load points. The three-phase squirrel cage motor from the MEBKSL series is designed as a vertical motor in the IM 3011 (IM V1) design with a shaft height of 710 mm. It has a nominal output of 650 kW, a nominal voltage of 690 V and a nominal torque of 16,731 Nm.

The medium-sized motor manufacturer had a suitable 12-pole converter motor with 31 Hz star winding in stock and was therefore able to complete the order very quickly - only seven weeks passed between the inquiry and arrival at the customer. With its electrical data, the motor was perfectly suited to the requirements; only minor changes to the converter parameterization were necessary on site.

The mechanical adjustments were all the greater: The existing motor had cooling type IC 86W (water-cooled) and had to be converted to IC 666 (air-cooled). Menzel built an adapter for an air cooler in stock and modified the motor's air flow. For mounting on the pump, Menzel also made a custom adapter flange and adjusted the shaft dimensions. The pump motor was designed to IP55 protection. In its new energy-efficient paint shop, Menzel also gave it a special coat of paint to protect it from the aggressive climatic conditions.