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Motor decompression starter circuit diagram 1

2016-09-02 07:49  
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Motor decompression starter circuit diagram 1
Motor decompression starter is composed of decompression starting control circuit and protection circuit. the circuit is shown as the chart. Decompression starting control circuit is composed of the start button S1, the master controller (Q2a, Q2b), AC contactors KM1 ~ KM3, intermediate relays KA1, KA2, time relay KT, auto transformer TA1 and so on. Protection circuit consists of the power transformer T, the diodes VD1 ~ VD5, capacitors C1 ~ C3, three-terminal integrated voltage regulator integrated circuit IC1, potentiometer RP, time-base integrated circuit IC2 and relay Κ and so on. TA2, TA3 are the current transformers, KR1 and KR2 are the thermal relays, QS is the circuit breaker. C1 and C2 select the luminum electrolytic capacitors with voltage in 25V a; C3 and CZ choose monolithic capacitors. RP uses small potentiometer or variable resistor. VD1 ~ VD5 select 1N40071N rectifier diodes.