how to change air compressor

132kw-8 级 motor actual running current of 220A ~ 240A, 4 air compressors share a tank, the actual pressure required 0.6 ~ 0.7Mpa, Remote pressure gauge instructions to 0.64Mpa. How do I transform?
First, four air compressor only change one (132kw-8)plus an auxiliary pressure transmitter, the actual sampling pipe network pressure feedback to the inverter. Converter software (PID function), automatically adjusts the output voltage. (Ie reducing the real power) to meet the actual gas consumption. Agreed that the impact of motor inverter to prevent the temperature, we use RB600-3P160G type (160kw inverter)
Second, use of industrial / manual switching frequency, there is a problem if the frequency converter, frequency can be changed to run. Really does not affect the plant's actual production to ensure the long-running air compressor.
Third, the pressure required according to the customer, you can set the network pressure 0.6Mpa, because while four air compressor for power, we will not change the three of them are a waste of energy, through the frequency transformation of a savings down.
Forth, based on actual experience and transform into the line current of 190A or so, about saving power 30 / 2 = 15kw. KWh = kilowatt / hour (15 degrees / hour), 24-hour operation, day of kWh saved = 15 * 24 = 360 degrees. To 0.5 yuan per unit calculation = 360 * 0.5 = 180 yuan / day. Month = 180 * 30 = 5400 yuan
Fifth, air compressor frequency converter efficiency:
1. Save energy
2. Running costs
3. To improve the accuracy of the pressure
4. To extend the life of the compressor
5. Low noise air compressor