VFD Panels
VFD panels for energy efficiency, pressure stability, and smooth motor control.
Technical data sheet
VFD Panel (Variable Frequency Drive)
Variable Frequency Drive (VFD) panel for energy-efficient motor speed control, soft starting, and process automation. Suitable for pumps, fans, blowers, compressors, and conveyors with HVAC / process / pumping firmware.
Characteristics
| Motor Rating | HP | 0.5 to 500 |
|---|---|---|
| kW | 0.37 to 375 | |
| Input voltage | V AC | 200–240 (1Φ/3Φ) / 380–415 (3Φ) / 440–480 (3Φ) |
| Output | — | 3-phase, 0–599 Hz (drive-dependent) |
| Control modes | — | V/F / Sensorless vector / Closed-loop vector |
| Overload capacity | — | 150% for 60 sec (Heavy Duty) / 110% for 60 sec (Normal Duty) |
| Communication | — | Modbus RTU (std), Ethernet / Profinet / BACnet (option) |
| Display | — | Built-in keypad with LCD / detachable remote panel |
| Protections | — | Over current, Over voltage, Under voltage, Earth fault, Motor overload, Phase loss, IGBT temp |
| Enclosure | — | Powder-coated MS, IP54 / IP55 (panel level) |
| Applications | Use | Pumps, Fans, Blowers, Compressors, Conveyors, HVAC, Process industries |
Material of Construction — VFD & power
- VFD drive: Danfoss / ABB / Siemens / Schneider / Delta / Yaskawa
- Input fuses: Semiconductor fuses (HRC class)
- Input contactor: AC-1 duty (line side)
- Line reactor: Iron-core 3-phase reactor (option, 3–5% impedance)
- DC choke: Internal or external (drive-dependent)
- EMC filter: Built-in C2/C3 or external (per environment)
- Output reactor / dV/dt filter: For long motor cables > 50 m (option)
- Bypass contactor: Manual / auto bypass for VFD fault (option)
Material of Construction — Control & enclosure
- Keypad / HMI: Built-in alphanumeric LCD or remote 7" touchscreen
- Pressure transmitter input: 4–20 mA, for PID closed-loop
- I/O: Digital inputs (start/stop/reverse), analogue I/O
- Communication: Modbus RTU (std), Ethernet / Profinet (option)
- Indicators: LED indicators (Run, Fault, Forward, Reverse)
- Push buttons: Start (green) / Stop (red) / Reset
- Enclosure: Powder-coated MS, IP54/55, ventilated with fan + filter
- Cooling: Forced fan-cooled with dust filter; AC-cooled (large frames)
Salient Features
- Energy savings up to 40–60% on variable torque loads (pumps / fans)
- Soft start / soft stop — eliminates mechanical & hydraulic shock
- Multiple control modes: V/F, sensorless vector, closed-loop vector
- Built-in PID controller for closed-loop pressure / flow / temperature control
- PWM-based IGBT inverter — high efficiency, low harmonics
- Built-in EMC filter (Cat C2 / C3) — meets IEC 61800-3
- DC choke / line reactor reduces input current THD
- Sleep / wake mode for pump applications
- Motor overload protection (electronic, configurable)
- Modbus RTU communication standard (SCADA-ready)
Applications
- Pump speed control & pressure regulation
- HVAC chilled water & cooling tower fans
- Industrial blowers & compressors
- Conveyor speed control
- Booster pump systems (energy savings)
- Cooling tower fan control
- Mining hoists & winches
- Water treatment plant aeration blowers
Specify motor rating, supply voltage, control mode, & communication protocol at RFQ stage.
For motor cables > 50 m, recommend dV/dt filter or sinewave filter to protect motor insulation.
Have a question? Drop us a line.
Share your duty point — head, flow, voltage, application — and our engineering team will match the right configuration.
All configurations & variants
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Technical Procurement Q&A
VFD Panels FAQs & Selection Guidance
Frequently asked engineering questions on sizing, electrical compatibility, testing standards, and overseas shipping.
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