General
Max. time-delayed switch-off	20
Number of contacts as normally open contact	0
Number of contacts as normally closed contact	1
Number of contacts as change-over contact	0
Width in number of modular spacings	1
Built-in depth	60
Degree of protection (IP)	IP40

Priority switches are used in installations where the existing conductor cross-sections or the size of the power supply connection do not allow two high-power consumers to operate simultaneously (e.g. storage heater and heat exchanger). Priority switches disconnect the long-term consumer (storage heater) as long as the short-term consumer (heat exchanger) is switched on. The current coil of the priority switch is connected in series with the short-term consumer. When the consumer is switched on, the breaker of the priority switch disconnects the contactor of the heating system, for example.