Electronic delay Y-△ start circuit
Source: InternetPublisher:小胖友 Keywords: Starting circuit transistor diode Updated: 2020/05/26
Working principle of the circuit: AC voltage passes through capacitor C, step-down, and diode VD. Rectification,
capacitor c2 filtering, and ZD voltage stabilization provide a DC voltage of 7.5 V for the transistor . When the interlock button SB is pressed
, on the one hand, the main circuit contactor KM coil is energized, and its normally open contact
is closed and self-locking; on the other hand, the capacitor C3 is charged, and the final voltage can reach 7V.
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