Electrical control circuit for dual-purpose water supply system.

Abstract

The invention relates to an electrical circuit controlling a dual-purpose water supply system. It serves both domestic water supply and fire suppression / firefighting (in case of fire). This circuit includes: an electric float switch, used to adjust the water level and capacity to meet domestic water supply standards; an electrical switch to change from automatic domestic water supply mode to fire fighting / forced water supply mode; a pressure switch to maintain a stable water pressure level for the fire fighting equipment as prescribed, while also ensuring the safe, stable, and durable operation of the main water supply pipeline; and a solenoid valve, which is normally open for water flow but closes in case of fire. The solenoid valve is controlled simultaneously with the circuit switching by a switch operated by the general operator or plant supervisor.

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