11 kw frequency conversion, plus an electric contact pressure meter to control a water pump motor. It requires low 4 pressure, high point and 8 pressure. How can I connect it?. Manufacturers to the approach of water pump to low-end wine began to maintain pressure, but not rising in opposition, the motor does not stop, what is the reason?. Also, I bought the electric contact pressure meter, there are 4 terminals, red at the bottom of the electrical contact, green in the middle, yellow in the above, the producer said I received the wrong end of the public, but I have three lines have been inverted. The motor is not automatic stop, master pointing what happened
You can use a multimeter before starting to start out a line close point for inverter (low voltage to low voltage pointer must be required to adjust), but do not use inverter panel wiring, control operation, until the pointer pressure gauge pressure to coincide, volume out of a closed point, so that you can find public line. Then access to the converter can be put into normal operation.
Backward, change the remote pressure gauge, do PID control, set the sleep parameters
1, since there are four terminals, it must have two is the power and ground, the other two are respectively corresponding with the output of high pressure and low pressure, general public is of course, so please make sure the power and ground, determined after measuring current and which is communicated with the. For less than 4 indicating pressure, another is the 8 high pressure, this is my guess, please implement this situation with the manufacturers.2, if you use a universal inverter, then when less than 4 pressure points, the inverter has to start the signal, until the 8 pressure point to arrive, you must slow down the frequency converter parking. At this point the pressure will gradually decrease and start the inverter when less than 4. Visible, below the 4 pressure point, the inverter must start, 8 down to the 4 stage, the inverter does not run until the pressure is less than 4, then trigger the start frequency converter3, frequency converter (non trigger level, the inverter has the function), 4 pressure points and start command series, 8 pressure points and stop command series, starting terminal and multi function terminal respectively contact transducer (multi function terminal need programming, three line mode, the brand names are
Electric contact pressure gauge: its junction box has four terminals (GB): the top is the upper limit, the second is the public end, the third is the lower limit, the fourth is the ground end, usually not. The middle of the needle is ordinary needle is a high one low middle high touch pointer newspaper report will form a loop to alarm or stop reporting low as the actual pressure in the lower when the public terminal is connected with the lower limit, and the upper limit is disconnected, the actual pressure between the upper and lower limits, the common end and the upper limit, lower limit are disconnected. When the actual pressure is above the upper limit, the upper limit is connected and the lower limit is broken. The electric contact is used to control the upper and lower pressure, the upper pointer is the upper limit, the following pointer is the lower limit, and the middle black pointer indicates the actual pressure value. The upper limit pointer can be reversed by hand, and the line should be positioned with a screwdriver. Its junction box has four terminals (GB): the top is the upper limit, the second is the public end, the third is the lower limit, the fourth is the ground end, generally not.Specific how to meet the inverter, it depends on what inverter you are, but also changes in the parameters of the inverter, through some contactors, such as closed loop control, frequency converters, and more used for constant pressure water supply and other fields.
