GK620 General-purpose AC Drive

GK620 is a general-purpose AC drive with V/Hz and sensor-less vector control. It’s powerful in performance, reliable in quality and optimized in structure. GK620 is widely used in various applications including air compressor, crane & lift, metal processing, mining, mills, food and beverage processing, packaging, conveyor, textile, plastics, fan & pump, etc.

Product Description

Abundant frequency setting sources.Abundant frequency setting sources.
Online and offline auto-tuning both available.Online and offline auto-tuning both available.
Diverse input and output terminals.Diverse input and output terminals.


GK620 Technical Features 


Power input Rated input voltage 200V level: single/three phase 220V~240V
400V level: three phase 380V~440V
Frequency 50Hz/60Hz, tolerance ±5%
Voltage range Continuous voltage fluctuation ±10%, short fluctuation -15%~+10%, i.e. 200V: 170V~264V, 400V: 323V~484V
Voltage out-of-balance rate <3%, distortion rate as per the requirements of IEC61800-2
Rated input current See Section 2.3
Power output Applicable motor (kW) See Section 2.3
Rated current (A) See Section 2.3
Output voltage (V) 3-phase: 0~ rated input voltage, error < ±3%
Output frequency (Hz) 0.00~ 600.00Hz; unit: 0.01Hz
Overload capacity 150% – 1min, 180% – 10s, 200% – 0.5s every 10 min
Control characteristics V/f patterns V/f control
Sensor-less vector control 1
Sensor-less vector control 2
Synchronous motor sensor-less vector control
Range of speed regulation 1:100 (V/f control, sensor-less vector control 1)
1:200 (sensor-less vector control 2, synchronous motor sensor-less vector control)
Speed accuracy ±0.5% (V/f control)
±0.2% (sensor-less vector control 1 & 2, synchronous motor sensor-less vector control)
Speed fluctuation ±0.3% (sensor-less vector control 1 & 2, synchronous motor sensor-less vector control)
Torque response < 10ms (sensor-less vector control 1 & 2, synchronous motor sensor-less vector control)
Starting torque 0.5Hz: 180% (V/f control, sensor-less vector control 1)
0.25Hz: 180% (sensor-less vector control 2, synchronous motor sensor-less vector control)
Basic functions Start frequency 0.00~ 600.00Hz
Accel Decel time 0.00~60000s
Switching frequency 0.7kHz~16kHz
Frequency setting Digital setting + control panel ∧/∨
Digital setting + terminal UP/DOWN
Analog setting (AI1/AI2/EAI)
Terminal pulse setting
Motor start-up methods Started from starting frequency
DC brake start-up
Flying start
Motor stop methods Ramp to stop
Coast to stop
Ramp stop + DC brake
Dynamic braking capacity Brake chopper working voltage:
400V level: 650V-750V
Service time: 0-100.0s; brake chopper for GK620-4T55G/75L and below are inbuilt or can be inbuilt optionally. See table 2-1
DC brake capacity DC brake start frequency: 0.00~600.00Hz
DC brake current: 0.0~100.0%
DC brake time: 0.0~30.00s
Input terminals 6 digital inputs, one of which can be used for high-speed pulse input, and compatible with active open collectors NPN, PNP and dry contact input. Digital inputs can be extended to 7
2 analog inputs, one of which is voltage/current programmable, and the other supports voltage only. Analog inputs can be extended to 3, and the extended one is voltage/current programmable
Output terminals 1 high-speed pulse output, 0~50kHz square wave signal output. It can output signals such as frequency setting, or output frequency, etc.
1 digital output
1 relay output (can be extended to 2)
1 analog output (can be extended to 2), voltage/current output programmable; can output signals such as frequency setting, or output frequency, etc.
Featured functions Parameter copy, parameter backup, common DC bus, free switchover between two motors’ parameters, flexible parameter displayed & hidden, various master & auxiliary setting and switchover, flying start, a variety of Accel/Decel curves optional, automatic correction of analog, brake control, 16-step speed control programmable (2-step speed supports flexible frequency command), wobble frequency control, fixed length control, count function, three history faults, over excitation brake, over voltage stall protection, under voltage stall protection, restart on power loss, skip frequency, frequency binding, four kinds of Accel/Decel time, motor thermal protection, flexible fan control, process PID control, simple PLC, multi-functional key programmable, droop control, autotuning, field-weakening control, high-precision torque restraint, V/f separated control
Protection functions Refer to Chapter 7- Troubleshooting


Environment Place of operation Indoors, no direct sunlight, free from dust, corrosive gases, flammable gases, oil mist, water vapor, water drop or salt, etc.
Altitude 0-2000m. De-rate 1% for every 100m when the altitude is above 1000 meters
Ambient temperature -10℃-40℃. The rated output current should be derated 1% for every 1℃ when the ambient is 40℃­­-50℃
Relative humidity 0~95%, no condensation
Vibration Less than 5.9m/s2 (0.6g)
Storage temperature -40℃~+70℃
Others Efficiency at rated Amps Rated power
7.5kW and below: ≥93%
11~ 45kW: ≥ 95%
55kW and above: ≥98%
Installation Wall-mounted
IP grade IP20
Cooling method Forced air cooling


Application Scope

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