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.
Thanks to sophisticated engineers, scientific producing workmanship, rigorous quality control systems and management team, GK620 frequency inverters are equipped with advanced features, some of which are listed as below:
01 Starting torque: 180%, 0.25Hz (sensor-less vector control 2), 150%, 0.5Hz (sensor-less vector control 1)
02 Speed adjustable range: 0-50Hz: 1:200 (sensor-less vector control 2), 1:100 (V/Hz control, sensor-less
vector control 1)
03 Speed accuracy: +/-0.2% (sensor-less vector control 1&2), +/-0.5% (V/Hz control)
04 Speed fluctuation: +/-0.3% (sensor-less vector control 1&2)
05 Torque response: less than 10ms (sensor-less vector control 1&2)
06 Over load capability: 150% 1minute, 180% 10 seconds, 200% 0.5 second, once every 10 minutes
07 Output frequency: 0.00-600.00Hz, or customized like 1MHz
08 Abundant frequency setting sources
09 DC brake start frequency: any frequency in the range of 0Hz to 600.00Hz
10 Diverse input and output terminals
11 Ambient temperature: -10°C~50°C
12 High precise torque limit, process PID control, simple PLC, wobble frequency control, mechanical brake control, field weakening control, all-side protection, etc.
13 Online and offline auto-tuning both available
14 Extreme short-time acceleration can be operated without trip, such as 0.1s from 0Hz to 50Hz
| Mains Supply (R/L1,S/L2,T/L3) | |
| Supply voltage | 208-240V ±10% 380-480V ±10% |
| Power source frequency | 47-63 Hz |
| Displacement power factor (cos φ) | (> 0.98) |
| Output Data (U, V, W) (R/L1,S/L2,T/L3) | |
| Output voltage / frequency | 0-100% of supply voltage / 0.00-600.00 Hz or customized |
| Ramp time | 0.01-60000 S |
Note: 150% current can be provided for 1 minute, 180% for 10 seconds.
Higher overload rating is achieved by oversizing the drive.
| Digital Input | |
| Programmable digital inputs | 6 (8) |
| Logic | NPN or PNP |
| Voltage level | 10 – 30V |
| Pulse input | 1 (X6/DI) |
| Analog Output | |
| Programmable analog outputs | 1 (3) |
| Voltage range / current range | 0 – 10 V / 0 – 20 mA |
| Relay Output | |
| Programmable relay outputs | 1 (3) |
| RA – RB / TA – TB | Normally close |
| RA – RC / TA – TC | Normally open |
| Contact capacitance | 250 V AC / 3A, 30 V DC / 3 A |
| Terminal 485 Interface | |
| 485+ / 485- | Rate: 4800/9600/19200/38400/57600/115200 bps Max. distance: 500 m |
| GND | Isolated from COM |
| Ambient | |
| Vibration | Less than 5.9 m/s² (0.6g) |
| Humidity | Relative humidity 5% – 95 %. No condensation |
| Corrosive environment | 3C3 |
| Ambient temperature | -10ºC – 50 ºC |
| Altitude | 0 – 2,000 m |
| Rated output current derated 1% every 100 m above 1,000 m | |
| Storage temperature | -40 – +70 ºC |
| Efficiency | Efficiency At rated amps: |
| 7.5kW and below: ≥93% | |
| 11 – 45 kW: ≥95 % | |
| 55kW and above: ≥98 % | |
| IP grade | IP20 |
| Cooling method | Forced air cooling |
| Fieldbus Communication | |
| Modbus RTU, Modbus ASCII | Built-in |
| Profibus DP, CAN, CANopen, etc. | Optional |
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 | 0.00~60000s | ||
| Decel time | |||
| Switching | 0.7kHz~16kHz | ||
| frequency | |||
| Frequency setting | Digital setting + control panel ∧/∨ | ||
| Digital setting + terminal UP/DOWN | |||
| Communication | |||
| 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 | ||
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