Overview
The LNC820D Series is a high-protection VFD that can easily drive and control asynchronous motors. It features powerful functions and stable performance, complying with major international standards and certifications. The main control unit adopts a dedicated DSP chip for motor control, delivering strong current vector control performance to achieve higherperformance and higher-precision motor drive control. It supports richer frequency source superposition and switching modes, advanced PID algorithms, 15-step speed control, automatic program operation, as well as wobble frequency control and speed tracking functions. While improving product reliability and environmental adaptability, it also enhances userfriendliness and industry-specific design, resulting in optimized functions, more flexible applications and more stable performance. It can be applied in industries such as textiles, papermaking, wire drawing, machine tools, packaging, food processing, fans, water pumps, as well as various automated production equipment.
Product features
- It can avoid overcurrent faults caused by direct starting and achieve smooth starting.
- When the motor torque requirement is low, reduce the excitation current according to the load current.
- Maximize motor efficiency.
- Reduce motor losses and energy consumption.
- Three curve setting methods: The straight line curve is suitable for ordinary constant torque loads, the multi-point curve is suitable for load of water extractors and centrifuges, and the square curve is suitable for loads of fans and water pumps.
The three points of the curve can be adjusted. - The most suitable curve can be set according to the torque characteristics of the equipment to achieve better energy-saving effects.
- It can achieve smooth starting and avoid overcurrent faults caused by direct starting.
- Full series of sheet metal structure.
- IP protection level is IP65.
Model meaning
List of machine types
| VFD model | Power capacity (kVA) | Input current (A) | Output current (A) | Applicable motor (KW) |
|---|---|---|---|---|
| Single – phase power supply: 220V±15%, 50/60Hz | ||||
| LNC820D-2S0007GB | 1.5 | 8.2 | 5.0 | 0.75 |
| LNC820D-2S0015GB | 3 | 14.0 | 7.0 | 1.5 |
| LNC820D-2S0022GB | 4.0 | 23.0 | 9.6 | 2.2 |
| Three – phase power supply: 380V±15%, 50/60Hz | ||||
| LNC820D-4T0007GB | 1.5 | 3.4 | 2.1 | 0.75 |
| LNC820D-4T0015GB | 3.0 | 5.0 | 3.8 | 1.5 |
| LNC820D-4T0022GB | 4.0 | 5.8 | 5.1 | 2.2 |
| LNC820D-4T0037GB | 5.9 | 10.5 | 9 | 3.7 |
| LNC820D-4T0055GB | 8.9 | 14.6 | 13 | 5.5 |
| LNC820D-4T0075GB | 11 | 20.5 | 17 | 7.5 |
| LNC820D-4T0110GB | 17 | 26 | 25 | 11 |
| LNC820D-4T0150GB | 21 | 35 | 32 | 15 |
| LNC820D-4T0185GB | 24 | 38.5 | 37 | 18.5 |
| LNC820D-4T0220GB | 30 | 46.5 | 45 | 22 |
Technical specifications
| Item | Specification | |
|---|---|---|
| Basic functions | Output frequency | 0 – 500Hz |
| Carrier frequency | 0.8kHz ~ 12kHz, the carrier frequency can be automatically adjusted according to the load characteristics | |
| Frequency resolution | 0.01Hz | |
| Control mode | V/F control | |
| Torque characteristics | With torque compensation and slip compensation, starting torque: G – type machine 0.5Hz/150%, P – type machine 0.5Hz/100% | |
| Torque boost | Automatic torque boost; Manual torque boost 0.1% ~ 30.0% | |
| Overload capacity | G – type machine: 150% of rated output current for 60S P – type machine: 130% of rated output current for 60S | |
| Speed regulation range | 1:100 | |
| Speed stability accuracy | ±1% | |
| Automatic voltage regulation (AVR) | When the grid voltage changes, it can automatically maintain a constant output voltage | |
| Over – voltage and over – current stall control |
Automatically limits the current and voltage during operation to prevent frequent over – current and over – voltage tripping | |
| Fast current – limiting function | Minimizes over – current faults to protect the normal operation of the frequency converter | |
| V/F curve | Four modes: linear type; multi – point type; complete V/f separation; incomplete V/f separation | |
| Acceleration and deceleration curves | Linear or S – curve acceleration and deceleration modes; four acceleration and deceleration times; acceleration and deceleration time range: 0.1 ~ 6500.0s | |
| DC braking | DC braking frequency: 0.00Hz ~ maximum frequency, braking time: 0.0s ~ 36.0s, braking action current value: 0.0% ~ 100.0% | |
| Jog control | Jog frequency range: 0.00Hz ~ 50Hz; jog acceleration and deceleration time: 0.0s ~ 6500.0s | |
| Simple PLC, multi – speed operation | Up to 16 – speed operation can be achieved through the built – in PLC or control terminals | |
| Built – in PID | It can easily implement a process – control closed – loop control system | |
| Operating characteristics | Operating command channel | Three channels: given by the operation panel, given by the control terminals, given by the serial communication port. It can be switched in various ways |
| Frequency source | Ten frequency sources: given by panel knob, given by operation panel, given by analog voltage, given by analog current, given by RS485 communication, multi – speed, PID, simple PLC, which can be switched in various ways |
|
| Auxiliary frequency source | Ten auxiliary frequency sources. It can flexibly achieve auxiliary frequency fine – tuning and frequency synthesis | |
| Input terminals | Six digital input terminals, one of which can be used as a high – speed pulse input. Two analog input channels, AI1: input range 0 ~ +10V, AI2: input range 0 ~ +10V/0 – 20mA |
|
| Display and keyboard operation | Output terminals | One high – speed pulse output terminal, outputting square – wave signals from 0kHz ~ 50kHz, which can realize the output of physical quantities such as set frequency and output frequency One digital output terminal One relay output terminal Two analog output terminals, AO1：0V～10V， AO2：0V～10V/0-20mA, which can indicate output frequency/current/voltage/frequency command/ speed/power factor signal output |
| LED display | It is equipped with 8 function keys, a 5 – digit 7 – segment LED, and 5 status LED indicators. It can perform forward rotation, reverse rotation, reset, stop, jog, as well as parameter setting and display |
|
| Protection characteristics | Protection function | Motor short – circuit detection upon power – on, output phase – loss protection, over – current protection, over – voltage protection, under – voltage protection, over – heat protection, overload protection, etc |
| Environment | Application place | Indoors, not directly exposed to sunlight, free from dust, corrosive gases, flammable gases, oil mist, water vapor, dripping water or salt, etc |
| Altitude | Less than 1000m | |
| Ambient humidity | – 10℃ ~ + 40℃ (When the ambient temperature is between 40℃ ~ 50℃, derating operation is required) | |
| Humidity | Less than 95%RH, without water droplet condensation | |
| Vibration | Less than 5.9m/s² (0.6g) | |
| Storage temperature | – 20℃ ~ + 60℃ | |
Basic wiring diagram
Appearance and installation dimensions
| Sheet metal structure dimensions | ||||||
|---|---|---|---|---|---|---|
| Machine type | Overall dimensions | Installation dimensions | Installation aperture | |||
| kW | H(mm) | W(mm) | D(mm) | A(mm) | B(mm) | mm |
| 0.75-5.5 | 245 | 138 | 180 | 88 | 235.5 | Φ5 |
| 7.5-11 | 280 | 170 | 186 | 120 | 267.5 | Φ6 |
| 15-22 | 340 | 190 | 199 | 140 | 327.5 | Φ6 |
Details
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