Pressure automatic control circuit
Source: InternetPublisher:吃掉星星 Keywords: Automatic control circuit intermediate relay pressure gauge switch Updated: 2020/03/05
Circuit working principle: close the circuit breaker QF, put the switch S in the automatic state, when the
system pressure is lower than the lower limit set by the electric contact pressure gauge , the intermediate relay K is closed, and the contact
K. Closed, the contactor KM absorbs and protects itself, the pressurizing pump runs, and starts to
pressurize and replenish the system. When the pressure reaches the upper limit set by the electric contact pressure gauge , the intermediate relay K2
is closed, the K2 contact is disconnected, the contactor KM is powered off and released, and the pressure pump motor stops running
.
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