Auxiliary release devices can build up pressure independently of the service release circuit.
Manual hand pump
Small-power range hydraulic power unit installed.

Auxiliary release devices

Spring-applied actuators brake the vehicle after an energy failure thus providing an indispensable safety instrument. After braking, however, there is a slight technical problem: the vehicle cannot be moved unless there is hydraulic pressure in the service release circuit. HANNING & KAHL has designed auxiliary release devices for this particular application. These devices can build up pressure in the actuator's second hydraulic circuit independently of the service release circuit. The brake can be released with this pressure allowing the ve hicle to be moved again. An auxiliary re - lease de vi ce can be deployed to release all the brakes on a tram or just the brakes of a particular bogie dep end ing on the vehicle design.

Technical Data

Typ HP HZY-NL HZY-K100 NL/HP
Equipment manual hand pump electrically propelled small hydraulic power unit Hydrogerät mit manuellelectrically propelled small hydraulic power unit in connection with hand pumper Handpumpe
Design frame type compact compact
Assembly position vertical or horizontal vertical (preferred) or horizontal vertical (preferred) or horizontal
Assembly location car body (drivers cab) bogies car body
Application manual release of s.a.c. per car or per bogie electrical release of s.a.c. per bogie manual or electrical release of s.a.c. per car
Function manual op. release, manual op. braking, electric op. braking electric op. release, manual op. braking manual op. release, electrc op. release, manual op. braking, electric op. braking