CHINT NVF3 Series variable frequency drive,
is a high-performance, open-loop vector control variable frequency drive designe for precise torque,
and speed control across demanding applications. Using advanced flux vector algorithms,
it offers powerful starting torque, wide speed range, and exceptional energy efficiency.
With built-in PLC logic, PID control, and RS-485 communication, the NVF3 ensures stable,
intelligent operation in machinery, textiles, HVAC, pumps, and other industrial automation systems.
- Standards: GB/T 12668.2-2002, IEC 61800-2
- Input Voltage Range: 3-phase 380 V (±15%)
- Input Frequency: 47–63 Hz
- Output Frequency Range:
- Typical (Heavy Load): 0–300 Hz
- Fan-Pump (Light Load): 0–120 Hz
- Control Modes:
- Sensorless Vector Control (SVC)
- V/F Control
- Torque Control
- Starting Torque:
- 150% rated torque at 0.5 Hz (without PG control)
- 180% rated torque at 0.5 Hz (with PG control)
- Speed Control Accuracy: ±0.2% of max speed
- Speed Ratio: 1:100 (Vector Mode)
- Carrier Frequency: Adjustable from 0.5–15 kHz
- Overload Capacity:
- Heavy Duty: 150% rated current for 1 min
- Fan/Pump Duty: 120% rated current for 1 min
- Built-in Functions:
- Simple PLC (multi-speed control and sequence logic)
- PID Control for process regulation
- Wobble Frequency Control for textile and winding systems
- Droop control for load sharing among multiple motors
- Automatic voltage regulation (AVR)
- Auto current limiting to prevent overcurrent tripping
- Energy-saving operation with load-based optimization
- Communication: RS-485 interface with MODBUS-RTU/ASCII protocol
- Protection Features:
- Overcurrent, overvoltage, undervoltage, short-circuit, overheat
- Phase loss and PID disconnection protection
- Braking Function:
- Built-in braking unit (≤22 kW)
- Optional braking resistor for high-power models
- Cooling Method: High-speed DC fan cooling
- Protection Degree: IP20
- Programmable Terminals:
- 7 Digital Inputs (1 high-speed pulse input)
- 3 Analog Inputs (0–10 V / 4–20 mA)
- 2-Analog Outputs
- 2-Relay Outputs
- 2-Open Collector Outputs
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