| 摘要 |
PURPOSE: A switch circuit is provided to prevent an electric accident or trouble from being extended by electrically isolating a control system and a power equipment and to seize a working state easily. CONSTITUTION: A power part(1) consists of small-sized transformers(T1,T2), a relay(RS1), a diode(D1), a transistor(TR1), a condenser(C1), resistors(R1,R2) and is connected to a switch part(2) and a relay part(3). The switch part(2) is connected to the relay part(3) and consists of a switch(S1), push switches(S2,S3), diodes(D2-D5), resistors(R3-R6), and electrolytic condensers(EC1-EC4). The relay part(3) consists of light emitting diodes(LD1,LD2), photo electric elements(Cds1,Cds2), relays(RS2,RS3), transistors(TR2,TR3), resistors(R7-R10) and condensers(C1,C2). A contact part(4) consists of relays(RS4-RS6).
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