Variable Speed Drive Advantages
.jpg "Frequency Inverter Starting")
.jpg "Total Load Managing System")
.jpg "Steady Pressure Air Supply")
.jpg "Energy Saving Control")
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Frequency Inverter Starting
Has small slope amperage increase compared to other starting methods, hence it will prolong the service life of motor, contactor and compressor.
Total Load Managing System
By adding only one VSD unit to the other conventional air compressors， as an energy efficient network, the whole system will improve the operation efficiency greatly.
Steady Pressure Air Supply
By maintaining the set pressure ± 0.1 bar，the VSD will save a good portion of electrical consumption.
Energy Saving Control
Provides best energy performance for load range of 30%~100%，and reduces the cost of operation by up to 25%.
| Type / Item | Conventional unit | VSD unit |
|---|---|---|
| Set pressure | 6~8 kg/cm2 | 7 kg/cm2 |
| Frequency & HP | 60HZ(50HP) | 18~60HZ(15HP~50HP) |
| Unloading amp (Voltage) | 53.5A(219V) | 11A(225V) |
| Rated amp (Voltage) | 117.6A(214V) | 107.3A(222.1V) |
| Load / Unload ratio | Unload 50% √3*219*53.5*0.875÷1000=17.76kW |
Full load √3*222.1*107.3*0.875÷1000=36.12kW |
| Full load 50% √3*214*117.6*0.875÷1000=38.14kW |
Constant load 36.12÷8*7=31.6kW |
|
| Hourly energy consumption | 38.14*50%+17.76*50%=27.95kW | 31.6kW÷50%=15.8kW |
| Hourly energy saving | 27.95 - 15.8 = 12.15 (kW) | |
| P.S.：kW（Motor kW）＝√3‧E（voltage）‧I（amp）‧cos θ（PF）÷1000 | ||
