Vacuum pump control cabinet failure and its solution

【Vacuum Pump】 vacuum pump not only has the characteristics of a miniature vacuum pump, but also has the advantages of miniature self-priming pump, so it can be long-term idle, dry turn, etc. occasions, unlike the general pump idling, or dry It will damage the pump. And small size, low noise, maintenance-free, continuous 24-hour operation, etc., so miniature vacuum pump in the medical, health, scientific research, environmental protection and other fields has been widely used. Next Xiaobian introduce you to the vacuum pump control cabinet failure and solutions for your reference. Vacuum pump control cabinet failure and solution 1, the liquid level control reverse phenomenon: water supply (drainage) tank has been full (anhydrous), the control cabinet to work, and no water (catchment is full), the control cabinet to stop Contrary to usage. Solution: Control the description of the float switch, which is normally closed for water supply, normally open drain, re-float the ball line. 2, the star delta decompression when starting the motor line then the wrong phenomenon: the motor starts normal, and go to run, the motor suddenly stopped or the air switch off. Solution: 1) Go to stop the motor in operation, check the wiring of the motor terminal to the terminal of the control cabinet according to the wiring diagram, and then readjust the wiring after checking. 2) Turn the air switch off during operation, and check whether the connecting copper pieces on the motor terminal are completely removed or the middle of the connecting cable is damaged or not. 3, auto-decompression starting torque is not enough phenomenon: auto decompression starter box at start-up, the motor starting torque enough not to move. Solution: 1) Check for missing phase. 2) Heavy-load start-up of the autotransformer 65% tap to 80% tap. (Conventional 65%) 4,15kw below the use of a standby type of direct start-up cabinet can not failover phenomenon: test failover, the main pump AC contactor coil arbitrarily removed a line, but not automatically Switch to the backup pump. Solution: The following 15kw with a spare control cabinet fault signal using the thermal relay normally open normally open contact for the fault signal. Solid test failover, the absence of thermal relays "97" and "98" caused a human failure test. (Editor: Li Juan)

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