DEVICE TO PROTECT VEHICLE ELECTRICAL EQUIPMENT WITH ENGINE SHUT DOWN Russian patent published in 2003 - IPC

FIELD: transport engineering. SUBSTANCE: invention relates to electrical equipment of vehicles, namely, to circuit connecting storage battery with body and it can be used to protect electrical equipment circuit when engine is shut down. Proposed device contains electromagnetic relay with normally open contacts and additional circuit protected by fuse. Contacts or relay are placed in break of electric power circuit between negative terminal of storage battery and frame formed by vehicle body. Winding of relay is connected to circuit between plus and minus terminals of storage battery by means of normally open contacts of ignition switch. Ignition circuit is connected between plus terminal of storage battery and first lead of relay winding, and additional circuit is formed between minus terminal of storage battery and frame. EFFECT: simplified switching and provision of protection of electrical equipment circuit with engine shut down. 6 cl, 2 dwg