do you know? Vacuum pump control cabinet common problems and solutions

What are the common problems of vacuum pump control cabinet? How to solve it? Xiaobian today to tell you the answer! You know? Vacuum pump control cabinet common problems and solutions 1, liquid level control reverse phenomenon: water supply (drainage) tank has been full (anhydrous), the control cabinet began to work, and no water (catchment full), control cabinet The opposite of stopping and using. 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. (65% conventional) 4,15kw following a standby type with a direct start counter, failover. Phenomenon: Test failover, the main pump AC contactor coil arbitrarily removed a line, but can not automatically switch to the standby 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 QQ: 2355962925) Recommended reading: 2017 Exhibition Information Top Ten brands of vacuum pumps 2016 Yiwu Fair