Micro Size General Purpose Inverter
The NH820 0.75-2.2KW general-purpose vector VFD is a compact low-power variable frequency drive designed for small asynchronous motors, covering single-phase 220V and three-phase 380V input options. Equipped with dedicated DSP motor control chip, it delivers stable low-speed torque and high-precision speed regulation for light-load small industrial equipment. This mini size frequency converter…
The NH820 0.75-2.2KW general-purpose vector VFD is a compact low-power variable frequency drive designed for small asynchronous motors, covering single-phase 220V and three-phase 380V input options. Equipped with dedicated DSP motor control chip, it delivers stable low-speed torque and high-precision speed regulation for light-load small industrial equipment.
This mini size frequency converter integrates abundant built-in functions including multi-speed operation, closed-loop PID, jog control and automatic energy-saving adjustment, fully compliant with international CE safety standards. Small footprint, easy cabinet mounting, widely adopted in light manufacturing, small water pumps, mini fans and small automated machinery.
- Ultra-compact plastic shell design, installation hole Φ5, easy integration into small control cabinets
- Smooth soft start eliminates inrush over-current, no impact on small motors
- Automatic load excitation current reduction, cut idle power loss for low-load operation
- 3 adjustable V/F control curves: linear (constant torque), multi-point (dehydrator), square law (small fan/pump)
- Built-in simple PLC supporting up to 16-speed switching for simple automation lines
- AVR automatic voltage regulation, stable output voltage under grid fluctuation
- S-curve acceleration/deceleration to avoid mechanical impact on miniature equipment
| Item | Parameter |
|---|---|
| Rated Power Range | 0.75KW / 1.5KW / 2.2KW |
| Input Voltage | Single-phase 220V (-15%~+15%); Three-phase 380V (-15%~+15%) |
| Output Frequency | 0–500Hz, resolution 0.01Hz |
| Carrier Frequency | 0.8kHz~12kHz auto-adjustable |
| Control Mode | V/F Open-loop Control |
| Starting Torque | G-type 0.5Hz/150%; P-type 0.5Hz/100% |
| Overload Capacity | G-type 150% rated current for 60s; P-type 130% rated current for 60s |
| Speed Regulation Ratio | 1:100, speed stability ±1% |
| I/O Terminals | 6 digital DI (1 high-speed pulse input); 2 analog AI (0~10V / 0~20mA); 1 relay DO, 2 analog AO |
| Communication | Built-in RS485 serial port, multi-frequency source switching |
| Auxiliary Functions | DC braking, jog operation, wobble frequency, speed tracking, PID closed-loop |
| Display | 5-digit LED panel with 8 function keys, forward/reverse/jog/reset operation |
Installation dimensions of the keyboard base
Diagrams of the overall dimensions and installation dimensions of the plastic structure
| Applicable models | Rated output power (kW) | Input voltage | A (mm) | B (mm) | H (mm) | W (mm) | D (mm) | Installation aperture (mm) |
|---|---|---|---|---|---|---|---|---|
| 820/860S | 0.4~2.2 | Single‑phase 220V range: -15%~ +15% |
90 | 157 | 170 | 101 | 142 | Φ5 |
| 820/860S/860E | 0.75~2.2 | Three‑phase 380V range: -15%~ +15% |
90 | 157 | 170 | 101 | 142 | Φ5 |
| 820/860S/860E | 4~5.5 | 111 | 183 | 197 | 129 | 175 | Φ5 | |
| 820/860S/860E | 7.5 | 137 | 237 | 256 | 157 | 190 | Φ5 | |
| 820 | 11 | 137 | 237 | 256 | 157 | 190 | Φ5 | |
| 820 | 15~22 | 151 | 303 | 320 | 170 | 222 | Φ5.8 | |
| 820 | 30~37 | 205 | 366 | 380 | 218 | 235 | Φ6 |
Diagrams of the overall dimensions and installation dimensions of the sheet metal structure
| Applicable models | Rated output power (kW) | Input voltage | A (mm) | B (mm) | H (mm) | W (mm) | D (mm) | Installation aperture (mm) |
|---|---|---|---|---|---|---|---|---|
| 820/860S | 0.4~2.2 | Single‑phase 220V range: -15%~ +15% |
90 | 157 | 170 | 101 | 142 | Φ5 |
| 820/860S/860E | 0.75~2.2 | Three‑phase 380V range: -15%~ +15% |
90 | 157 | 170 | 101 | 142 | Φ5 |
| 820/860S/860E | 4~5.5 | 111 | 183 | 197 | 129 | 175 | Φ5 | |
| 820/860S/860E | 7.5 | 137 | 237 | 256 | 157 | 190 | Φ5 | |
| 820 | 11 | 137 | 237 | 256 | 157 | 190 | Φ5 | |
| 820 | 15~22 | 151 | 303 | 320 | 170 | 222 | Φ5.8 | |
| 820 | 30~37 | 205 | 366 | 380 | 218 | 235 | Φ6 |
| Applicable models | Machine type (kW) |
Overall dimensions | Installation dimensions | Installation hole diameter | |||
|---|---|---|---|---|---|---|---|
| H(mm) | W(mm) | D(mm) | H1(mm) | W1(mm) | mm | ||
| 820/860S/860E | 11‑15 | 340 | 204 | 214 | 325 | 150 | Φ6 |
| 820/860S/860E | 18.5‑22 | 360 | 224 | 214 | 345 | 150 | Φ6 |
| 820/860S/860E | 30‑37 | 380 | 262 | 220 | 360 | 192 | Φ9 |
| 820 | 45 new | 480 | 270 | 250 | 465 | 190 | Φ7 |
| 820 | 45‑75 | 450 | 330 | 259 | 430 | 240 | Φ9 |
| 860S/860E | 45‑75 | 570 | 380 | 263 | 547.5 | 240 | Φ10 |
| 860S/860E | 90‑132 | 610 | 400 | 286 | 587.5 | 240 | Φ12 |
| 860S/860E | 160‑220 | 760 | 500 | 355 | 735 | 200 | Φ12 |
| 860S/860E | 250‑400 | 862 | 750 | 455 | 832 | 250 | Φ12 |
| 820/860S | 450‑560 | 1122 | 950 | 505 | 1092 | 350 | Φ12 |
| 820/860S | 630‑750 | 1045 | 1050 | 505 | 1015 | 400 | Φ12 |
Q1 Can this 0.75-2.2KW VFD drive single-phase motor?
A1 Support single/3-phase asynchronous motor, single-phase input model only drives 3-phase motor, match motor power strictly.
Q2 Does it support remote control?
A2 Yes, control via terminal analog signal, panel knob or RS485 serial communication, three command channels switchable.
Q3 Is energy-saving obvious for small pumps?
A3 Adopt square-law V/F curve, automatically reduce output torque under low flow, save 20%-40% power consumption.
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