Solid-state relay controlling flow of alternating current

摘要

The relay comprises a current transformer having a prim. winding in circuit with an ac source and a sec. widening. A transistor circuit is connected to the sec. winding and is triggerable selectively with on and off commands so as to short circuit the sec. winding. The prim. is thus rendered conductive to ac and the sec. is open-circuited for blocking ac through the prim. The transistor circuit comprises a pair off transistors, each having its emitter/collector network connected to the base of the other transistor. The transistor circuit is galvanically isolated from the load.