Air compressor circuit

The air compressor control circuit operates based on several key principles. The first function is overload protection, which is facilitated by the thermal relay (FR). In instances of prolonged motor overload, the thermal relay activates to prevent overheating and potential damage to the compressor. The second function involves a circuit breaker (QF) that provides protection against short-circuit faults in the main circuit of the compressed air system. When an overcurrent occurs, the circuit breaker trips, ensuring the motor is protected from overload conditions. The third function relates to a static protection mechanism involving KA, KA, and KM coils connected in a three-phase circuit. If any two-phase coil is powered while one phase is disconnected, the KA contacts will open, de-energizing the KM coil and stopping the motor. The fourth function is related to pressure control. If the compressor operates without sufficient pressure, the SP contact remains closed. When the start button (SB2) is pressed, the KM relay is energized. During operation, if the internal pressure exceeds a predefined limit, the SP contacts open, cutting off power and shutting down the AC contactor.

The air compressor control circuit is designed to ensure safe and reliable operation of the compressor system. The thermal relay (FR) serves as a critical component for overload protection. It continuously monitors the motor's temperature and disconnects the power supply if the temperature exceeds safe limits, thereby preventing damage due to overheating.

In addition to the thermal relay, the circuit breaker (QF) plays an essential role in safeguarding the electrical system against faults. It reacts to overcurrents, which may occur due to short circuits or other electrical anomalies, by interrupting the circuit and preventing potential hazards.

The static protection mechanism involving the KA and KM coils is vital for maintaining operational integrity. This configuration ensures that the motor can only operate when all necessary phases are present. If one phase is disconnected, the KA contacts open, which de-energizes the KM coil, leading to a safe shutdown of the motor.

Furthermore, the pressure control system is crucial for the efficient operation of the compressor. The SP contact monitors the pressure within the system. If the pressure falls below a certain threshold, the compressor cannot start. Conversely, if the pressure exceeds the maximum allowable limit, the SP contacts open, which disconnects the power supply to the compressor, thus preventing damage from excessive pressure.

Overall, the air compressor control circuit integrates multiple protective features to enhance system reliability and safety. Each component works in conjunction to monitor operational conditions, ensuring that the compressor operates within safe parameters and minimizing the risk of failure or damage.Air compressor control circuit, the circuit principle analysis of pumping at play: When the overload protection function (1) When the motor thermal relay FR long-term overload, thermal relays. FR action, which help the ship Guo Fang ship head off, to protect the compressor from overheating and damage. l; (2) the circuit breaker -QF oak Yao Lu protection when compressed air peach main circuit short-circuit fault, the circuit breaker ride overcurrent release operation When the motor overload protection x Portugal plot contained rabbit lute, the trip will be the thermal overload trip will run the compressor removal., (3) off the ah Tong Yichang child protection function is static KA, KA, KM coils are connected to three cabinet circuit, when any two-phase coil is connected to the power supply KA t KA line can not warm the feet together when one phase is disconnected.

Chang and contacts disconnect KA, KM coil energized when any of KM {two-phase coil connected with a broken leg when the line. KM can not ai coil units, the motor stops running. ;. (4) presses, electrical protection when no pressure compressor meat too often its sP A contact in the on state, this time, took the start press the button SB2, KM leisure together,:;} When the compression operation of the compressor when a certain pressure inside the machine, press the stop button SB1, the compressor is stopped.

When the compressor pressure exceeds the allowable value, its purple closed contacts sP off, cut off the power supply and AC contactor shutdown.