Overload and Short-Circuit Protection for Wind Turbine Generators up to 2000 A: Space Saving, Safe and Reliable.

Manufacturers of wind turbine generators avoid the use of bulky devices as much as possible due to the limited space available. The new NZMH4-VE2000 circuit-breaker is ideally suitable for connecting wind turbines to the grid power supply. As a compact circuit-breaker (W/H/D 280 mm x 401 mm x 207 mm) with a small mounting depth it requires very little space. With a short-circuit breaking capacity of 35 kA at 690 V, the NZMH4-VE2000 can disconnect a wind turbine safely from the grid in the event of a short-circuit. The short-circuit release itself can be adjusted to between 2 and 8 times the rated current range. It therefore offers the generator ideal protection against overloads in the event of a short-circuit. NZMH4-VE2000 circuit-breakers can be used without any derating at ambient temperatures of 50°C.

The combination of the circuit-breaker with DILH1400 or DILH2000 vacuum contactors is approved for type "1" coordination. Contactors execute the connection and disconnection of the wind turbine during normal operation, and the circuit-breaker provides the protective function. The DILH2000 enables users to implement direct grid connections. If the wind turbine is required for use in weak wind zones, a star-delta combination can be used to extend its operating range. Users can create the star-delta combination for rated currents of up to 2000 A with DILH1400 contactors.

Moeller GmbH, 53105 Bonn
Tel.: +49 (0)228 602-0
Fax: +49 (0)228 602-2275
E-Mail: presse@moeller.net
Internet: www.moeller.net
Please direct your enquiries to:
Corporate Communications, Tel.: +49 (0)228 602-2915

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