Protective devices for heat pumpsProducts especially for the protection of heat pumps.Protective devices for heat pumpsProducts especially for the protection of heat pumps. Categories Downloads Prospectus Energy transition - [ 1405 KB ] Residual current circuit-breakers (RCCBs) Residual current circuit-breaker specially designed for protecting heating… Residual current operated circuit-breakers with integral overcurrent protection (RCBOs) RCBOs of the HP variant combine residual current circuit-breakers and… Technical informationsProducts especially for the protection of heat pumps.