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Certified Cold Climate safety brake for wind power plants

When speaking of wind power brakes with regard to wind power generation, the safety brakes installed in pitch and yaw drives are generally meant.

Several manufacturers present products for applications in colder regions as "Cold Climate" versions (CCV). But the CCV marking on a device does not necessarily mean that these products are in fact suitable for cold climate conditions. The CCV product by Mayr power transmission has been certified by Germanic Lloyd (GL) as the only electromagnetic safety brake for applications down to -40 °C.

ROBA-stop-M safety brakes in the Cold Climate Version, installed in a pitch drive.

The definition of cold climate according to GL Wind states that temperatures of below -20 °C can occur. It really depends on the planned location of application and the manufacturer’s specifications to which minus temperatures functional and operational safety have to be guaranteed. In cold climate projects, storage temperatures of -40 °C and below are frequently demanded.

The safety brakes, which are based on the "ROBA-stop-M" series, guarantee minimum downtimes and optimised fail-safe function. In de-energised conditions such as after an emergency stop or power failure, these electromagnetic, spring applied safety brakes are closed and therefore accord with the high safety requirements. Masses and loads are held safely and reliably. On switching on the power, a magnetic field is built up, which attracts the armature disk against the spring pressure to the coil carrier. This releases the brake, and the shaft can then rotate freely.

In comparison to other safety brakes available on the market, the ROBA-stop-M brakes provide a few advantages with regard to the ease of maintenance and operating safety. These include the enclosed construction design, the high Protection, IP54 or IP65, and the high-quality corrosion protection. In addition to the high-quality drive elements, Mayr also provide years of experience in wind power technology based on intensive collaboration with renowned drive manufacturers.

Chr. Mayr GmbH + Co. KG, Eichenstraße 1, 87665 Mauerstetten, Dipl.-Ing. (FH) Hermann Bestle
Tel.: 08341/804-232, Fax: 08341/804-49232
E-Mail:, Web:

Hermann Bestle | Chr. Mayr GmbH + Co KG
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