| 摘要 |
A small size transformer comprises a short-circuit inducing device placed within a coil of coils of the transformer and electrically connected between a primary coil and a power supply. The device comprises a spacer of an electrically insulative material capable of melting at a given temperature, and a pair of conductors electrically insulated from each other by the spacer, but closely spaced enough to contact each other upon melting of the spacer. This arrangement prevents the burning of the transformer upon occurrence of an overcurrent flow through or short-circuit condition across the transformer coils by disconnecting the primary coil from the power supply.
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