Product Overview
Designed for 7.5kW and 11kW three-phase water pump motors, the LNC133 solar pump inverter continuously tracks the maximum available power from photovoltaic arrays and converts solar DC energy into stable AC power.
The inverter automatically adapts to changing sunlight conditions, reducing unnecessary shutdowns and improving daily water output. Its built-in PID function supports constant-pressure water supply, while vector control provides strong starting torque and stable motor operation.
Both the 7.5kW and 11kW models are equipped with built-in braking units.
Model meaning
Product Features
- High-efficiency MPPT algorithm for dynamic solar power tracking.
- 250–800V DC solar input range.
- Compatible with three-phase 380V pump motors.
- Built-in braking unit for 7.5kW and 11kW models.
- RS485 communication supplied as standard.
- Dual-channel relay output for flexible system integration.
- Open-loop vector control and V/F control.
- Starting torque up to 180% at 0.5Hz under SVC.
- Built-in PID, simple PLC and 16-step speed control.
- Comprehensive electrical and thermal protection.
Available Models
| VFD Model | Power Capacity | Input Current | Output Current | Applicable Motor |
|---|---|---|---|---|
| LNC133-4T0075G | 11kVA | 20.5A | 17A | 7.5kW |
| LNC133-4T0110G | 17kVA | 26A | 25A | 11kW |
Installation Dimensions
- Overall dimensions: 245 × 140 × 160.2mm
- Mounting dimensions: 129 × 239mm
- Installation hole diameter: M5
Typical Applications
- Medium-sized farmland irrigation
- Livestock watering systems
- Rural domestic water supply
- Small reservoir water transfer
- Mountain and remote-area water pumping
Technical specifications
| Item | Specification | |
|---|---|---|
| Control characteristics | Output frequency | 0-300Hz |
| Carrier frequency | 0.5kHz ~ 15kHz, carrier frequency can be automatically adjusted according to load characteristics | |
| Frequency resolution | 0.01Hz | |
| Control mode | Open – loop vector control (SVC) V/F control |
|
| Starting torque | 0.5Hz/180%（SVC） | |
| Speed regulation range | 1：100 ( SVC ) | |
| Speed stabilization accuracy | ±0.5% ( SVC ) | |
| Torque control accuracy | ±5%（SVC） | |
| Overload capacity | G Model: 150% rated output current for 60 seconds; 180% rated current for 3 seconds | |
| Torque boost | Automatic torque boost; manual torque boost: 0.1%~30.0% | |
| V/F curve | Three modes: Linear type; Multi-point type; V/F curve | |
| Acceleration and deceleration curve | Linear or S – curve acceleration and deceleration modes; four acceleration and deceleration times; acceleration and deceleration time range 0.1～3200.0s |
|
| DC braking | DC braking frequency: 0.00Hz ~ maximum frequency. Braking time: 0.0s～32.0s, braking action current value: 0.0% ~ 100.0% | |
| Simple PLC, multi-step speed operation | Up to 16 – step speed operation can be achieved through the built – in PLC or control terminals | |
| Built – in PID | It can easily realize the process – control closed – loop control system | |
| Automatic voltage regulation (AVR) | When the grid voltage changes, it can automatically maintain a constant output voltage | |
| Overvoltage, overcurrent & stall control | Automatically limit current and voltage during operation to prevent frequent tripping caused by overcurrent and overvoltage | |
| Fast current – limiting function |
Minimize over – current faults to the greatest extent and protect the normal operation of the frequency converter | |
| 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 | Main frequency sources: digital setting, analog voltage setting, analog current setting, RS485 communication setting, multi-speed segments, PID and simple PLC, switchable via multiple methods | |
| Auxiliary frequency source | Ten auxiliary frequency sources. It can flexibly achieve auxiliary frequency fine – tuning and frequency synthesis | |
| Input terminals | 6-channel digital input terminals; 2-channel analog input terminals; AI1: 0~10V voltage input; AI2: 0~10V voltage input or 4~20mA current input |
|
| Output terminals | 1- channel open collector FM; 2- channel relay output terminals; 2-channel analog output terminals, supporting 0~20mA current output or 0~10V voltage output |
|
| Display and keyboard operation | LED display | 5-digit parameter display |
| Key Locking and Function Selection |
Realize partial or full key locking and define the scope of functions of partial keys to prevent misoperation | |
| Protection characteristics | Protection function | Motor short-circuit detection upon power-on, output phase loss protection, overcurrent protection, overvoltage protection, undervoltage protection, overheating 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 | Derating is required when the altitude exceeds 1000 meters, with a 10% derating for every additional 1000 meters. |
|
| 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) | |
Basic wiring diagram
Installation dimensions of the keyboard base
Diagrams of the overall dimensions and installation dimensions of the plastic structure
Diagrams of the overall dimensions and installation dimensions of the sheet metal structure
| Machine type | Overall dimensions | Installation dimensions | Installation hole diameter | ||||
|---|---|---|---|---|---|---|---|
| kW | H(mm) | H1(mm) | W(mm) | D(mm) | A(mm) | B(mm) | mm |
| 0.75-5.5 | 200 | / | 130 | 155.5 | 119.5 | 189 | M4 |
| 7.5-11 | 245 | / | 140 | 160.2 | 129 | 239 | M5 |
| 15-18.5 | 279 | / | 180 | 162.5 | 165.5 | 268 | M5 |
| 22-30 | 385 | 430 | 230 | 225 | 184 | 410 | M6 |
| 37-45 | 382 | 430 | 270 | 225 | 222 | 410 | M6 |
| 55-75 | 534 | 594 | 310 | 265 | 200 | 570 | M8 |
| 90-110 | 643 | 653 | 326 | 292 | 200 | 635 | M8 |
| 132-160 | 760 | 769 | 450 | 335 | 300 | 751 | M8 |
| 185-200 | 880 1250(with base) |
930 1275(with base) |
579 | 380 | 449 | 903 | M8 |
| 220-315 | 983 1353(with base) |
1060 1392(with base) |
650 | 377 | 420 | 1030 | M10 |
| 355-450 | 1203 1653(with base) |
1358 1731(with base) |
800 | 400 | 520 | 1300 | M14 |
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