50 hp (37 kW) VFD, 3 Phase 220V, 400V, 460V

Discounted 50 hp (37 kW) VFD, three phase 220V, 400V, 460V energy saving variable frequency drive for motor speed controls, brand new direct sale by manufacturer with fast delivery.
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Delivery date: 6 - 12 days

50 hp (37 kW) variable frequency drive for energy savings, three phase 220V, 400V, 460V for selection.


Basics Model GK3000-4T0370G
Capacity 50 hp (37 kW)
Shipping weight 30 kg
Dimension 500*296*276 mm
I/O Feature Rated current 75 A
Input voltage 3 phase 220V /400V /460V AC ±15% (Optional)
Input frequency 50 Hz / 60 Hz
Output voltage 3 phase AC 0~input voltage
Output frequency 0.00~400.00Hz
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%
Frequency resolution Analog setting: 0.1% of max frequency;
Digital setting: 0.01Hz
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


Tips: Protect motor from bearing failure with a correctly specified VFD.
A correctly specified and installed variable frequency drive (VFD) system will not damage bearings or motor equipment, it will actually prolong and protect the motor and extend its life. It is important to talk to your VFD manufactures engineers to find out how to do this as it does not just happen by buying the cheapest VFD you can find, and do not buy the cheapest motor either. Buy one that is designed for VFD service.

Whatever the performance of the VFD, the most important thing is to protect your motor from the VFD induced shaft current which will ultimately destroy the motor bearings (or whatever is connected downstream in case the motor have insulated bearings). A lot of people have mistaken the failure of the bearings as mechanical failure. However, if you cut opened the failed bearing and notice fluting (washing board pattern) or frosting (white line along the wall), this is proof that there have been electrical discharge through the bearing.

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PDF: GK3000 VFD User Manual
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