3 Hp VFD, Single Phase To Three Phase VFD

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Model: GK3000-2S0022
Weight: 1.00
SKU: GK3000-2S0022

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3hp variable frequency drive, 2.2kW, single phase 220V-240V to three phase VFD, 10 amps.

Specification:

Basics	Model	GK3000-2S0022
	Capacity	3 hp (2.2 kW)
	Shipping weight	3 kg
	Dimension	190104150 mm
I/O Feature	Rated current	9.6 A
	Input voltage	1 phase 220~240V AC
	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, Sensorless vector control (SVC), Speed sensor vector control (FVC)
	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

Note: RDDLZ VFD Cannot be used as a power source, it Can only be directly connected to an induction motor to control the motor speed.

Details

Tips: Variable frequency drive overcurrent
Overcurrent is the most frequent alarm phenomenon of VFD.

A. Phenomenon

When restarting, VFD trips once speed up. This is a very serious phenomenon of overcurrent. The main reasons are: Load short circuit, mechanical parts stuck, inverter module damaged, and smaller motor torque and so on.
Tripping after power on. This phenomenon cannot be reset. The main reasons are: Module broken, bad driving circuit, and bad current detection circuit.
The tripping is not happening when restart but when accelerating, the main reasons are: Acceleration time setting is too short, current upper limit setting is too small, and the torque compensation (V/F) setting is too high.

B. Maintenance examples

The VFD displays "OC" once starting.
Open the cover and don't find any signs of burn out. Online measure IGBT finds no problems. In order to further determine the problem, disassemble the IGBT and measure the seven high-power transistors, the opening and closing are good. When measuring the upper half of the bridge drive circuit, find a circuit is obviously different with the other two. After careful inspection, find an optocoupler A3120 output pin and negative power supply short circuit. Replace it and test again, three circuits are the same. Finally install IGBT and everything running well.
A 3 hp VFD displays "OC" and cannot be reset.
First check the inverter module but don't find the problem. Second, check the drive circuit and find no abnormal phenomenon. It is estimated that the problem is not here, and may be in the part of over-current signal processing. Remove the circuit sensor and then power on showing everything is normal, so the sensor has been broken. After replaced with a new sensor, the on-load experiment shows everything normal.

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