Description
7.5 hp heavy duty variable frequency drive, three phase 50Hz/60Hz 208V /380V /480V ±15%, brand new direct sale by manufacturer.
Specification:
| Basics | Model | GK3000-4T0055G/ GK3000-2T0055G |
| Capacity | 7.5 hp (5.5 kW) | |
| Shipping weight | 5 kg | |
| Dimension | 272*172*182 mm for GK3000-4T0055G/ 330*200*200 mm for GK3000-2T0055G | |
| I/O Feature | Rated current | 13A at 380V ~ 480V, 25A at 220V ~ 240V |
| Input voltage | 3 phase 208V /380V /480V AC ±15% (Optional) | |
| Input frequency | 50Hz/ 60Hz | |
| Output voltage | 3 phase AC 0~input voltage | |
| Output frequency | 0Hz~1000Hz | |
| Over load capacity | 150% of rated current for 1 minute, 180% of rated current for 3 seconds | |
| Control Feature | Control mode | V/F control; Sensorless vector control; |
| Communication | RS485 | |
| Speed regulation | 1:100 | |
| Start torque | 150% of rating torque at 1 Hz | |
| Speed control accuracy | ≤±0.5% of rating synchronous speed | |
| Frequency precision | Digital setting: max frequency x± 0.01%; Analog setting: max frequency x± 0.2% |
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| Frequency resolution | Analog setting: 0.1% of max frequency; Digital setting: 0.01Hz |
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| Torque boost | Automatic torque boost, manual torque boost 0.1%~30.0% | |
| Interior PID controller | Be convenient to make closed-loop system | |
| Automatic energy save running | Optimize V/F curve automatically based on the load to realize power save running | |
| Automatic voltage regulation (AVR) | Can keep constant output voltage when power source voltage varies. | |
| Automatic current limiting | Limit running current automatically to avoid frequent over-current which will cause trip | |
| Environment | Enclosure rating | IP 20 |
| Temperature | –10℃~ +40℃; VFD will be derated if ambient temperature exceed 40℃; each rise 1℃, the derate will be 5% | |
| Humidity | 5%-95%, without condensation | |
| Altitude | ≤1000m; VFD will be derated if above 1000m | |
| Impingement and oscillation | Normal running:＜5.9m/s2 (0.6g); Transportation:＜15m/s2 (1.5g) | |
| Store environment | –20℃~ +60℃; no dust, no corrosive gas, no direct sunlight |
Note: ATO VFD Cannot be used as a power source, it Can only be directly connected to an induction motor to control the motor speed.
Tips: Variable frequency drive fault static test method
For a faulty VFD, power off the device and test its rectification and inversion part, in most cases the fault can be found this way. Pay attention that VFD cannot be measured immediately after power off, because there are large capacitors store with hundreds of volts of high voltage. The testing only can be launched more than ten minutes later. In order ensure personal safety, the operator must ensure that the machine is off, and the power input lines R/S/T and output lines U/V/W are removed.
Static test method
First turn the multimeter to “diode”, and then use the multimeter’s red and black pens to detect according to the following steps:
- Use black pen to touch the DC bus P (+), and the red pen touch R/S/T in turn, record the displayed values; and then the red pen touch N (-), black pen touch R/S/T, record the displayed values. If the six displayed values are balance, then the VFD diode rectifier or soft start resistance have no problem, otherwise the rectifier module or soft start resistance from the corresponding position is damaged.
- Use red pen touch the DC bus P (+), and the black pen touch U/V/W in turn, record the displayed values; and then the black pen touch N (-), red pen touch U/V/W, record the displayed values. If the six displayed values are balance, then the IGBT inverter module has no problem, otherwise the IGBT inverter module of the corresponding location is damaged.
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