FIELD: electricity.
SUBSTANCE: switch accommodates a case (1), a heater (3) with an external core (2), a drive actuating the core (4) with a spring (5), a cross frame (6), a fuse strip (7) and a normally open terminal pair (8). When applying a voltage on a heater winding (3), the cross frame (6) closes the terminal pair (8) to form a circuit: power supply (an accumulator), terminal pair (8) and fuse strip (7). Driven by a short-circuit current generated by a remaining charge of the disconnected accumulator, the fuse strip blows out, and the accumulator is disconnected before discharged completely.
EFFECT: junction resistance decrease of the normally closed contacts, design simplification, downsizing and weight reduction.
1 dwg
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