20 kVA Static Frequency Converter, 3 Phase 220V/380V/480V

20 kVA three phase static frequency converter, compatible with 3 phase 220v/380v/480v 50Hz/60Hz power system, output single phase or three phase, convert 60Hz to 50Hz for electric equipment.
Delivery date: 6 - 12 Days

20 kVA three phase 220V/380V/480V static (solid state) frequency converter, adjustable output voltage and frequency, easy converting 60Hz to 50Hz and 3 phase to 1 phase (vice versa).


Model HZ-50-3320
Capacity 20 kVA
Dimension 770*580*1140mm
Weight 220 kg
Input Voltage 3 Phase 4 Wire: Wye Type 190/110, 200/115, 208/120, 220/128, 230/132, 240/139V ±10% (option *)
3 Phase 4 Wire: Wye Type 380/220, 400/230, 415/240, 440/254, 460/265, 480/277V ± 10% (option *)
3 Phase 4 Wire: Della Type 220, 230, 240, 380, 400, 415, 440V ± 10% (option *)
Frequency 50 Hz, 60 Hz or 400 Hz ± 5%
Output Voltage, current 110V Setting (Low grade): 0-150V (phase voltage), 0-260V (line voltage) 55.6A
220V Setting (High grade): 0-300V (phase voltage), 0-520V (line voltage) 27.8A
Load stabilization Rate ≤±1%
Frequency 50Hz, 60Hz up to 400Hz adjustable
-When the output is 400Hz, the load capacity can only reach 50% of the rated capacity.
-When the output is ≤120Hz, the load capacity can reach 100% of the rated value.
-You can just adjust converter output frequency in the range (40-400Hz) for 400Hz option.
Frequency Stability ≤±0.01%
Harmonic Distortion Pure Sine Wave ≤2%
Frequency meter 4 digit, digital frequency meter, resolution 0.1Hz/Step
Voltmeter 4 digit, digital voltage meter, resolution 0.1V
Ammeter 4 digit, digital ammeter, resolution 0.1A
Watt meter 4 digit, digital Watt meter, resolution 0.1W
Protection With overload, short circuit, over temperature
Instantaneous power failure protection and alarm device
Working Environment Temperature 0 - 40 deg.℃
Humidity 0 - 90% (Non condensation)
Warranty 18 months

* The input voltage is factory selected.

Tips: If I run a 3-phase motor rated 460V 60Hz on a 380V 60Hz power supply what will happen?
For motors not driven by a variable frequency source the volts/hertz ratio should stay constant to keep the magnetic fields compliant with the motor design. If you ran a 480V / 60 Hz motor at 380V / 50 Hz the volts/hertz ratio would be maintained but with it being 380V / 60 Hz you have not maintained the volts/hertz ratio. Also, the motor should be protected with a thermal overload device, not just an upstream circuit breaker. You can check the condition of the motor by performing a megger, Hipot, and surge comparison test to determine if it has been damaged. The frequency of the source and the number of the motor poles sets the basic speed of the induction motor so motors can operate at 50 or 60 Hz line frequencies but obviously the speed will change and the voltage needs to be provided accordingly to keep the Volts/Hz ratio constant, when not using a VFD. Also, the load would have to be adjusted accordingly to not exceed the motor nameplate current rating.

Download PDF, DOC...
PDF: 50Hz/60Hz Frequency Converter Manual
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380 increase to 480
We need to supply our 3-phase motor 480V 60hz from our distribution power line 380V 50Hz. We look for a converter that can increase our distribution 380V up to 480V and change 50 to 60Hz.  Can this device do this task?
By Serge on 27/11, 2019
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Output two different voltages
No, it is one selected output voltage a time for all terminals as clarified: GoHz frequency converter output terminals are L1,L2,L3 + N,G. So for example, if you need to get 480V for output, you do the following through converter operating panel:
a. Select high grade setting (0-520V).
b. Adjust required voltage by a rotary knob.
And if you need to get 208V from same converter:
a. Select low grade setting (0-260V).
b. Adjust required voltage by a rotary knob.
By GoHz.com on 27/04, 2018
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Output two different voltages
Is it possible to output two different voltages at the same time depending on the terminal?
By Colin on 27/04, 2018
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