Variable frequency drive and soft starter panels from 0.75 kW to 1000 kW
VFD and Soft starter Panel Working
VFD Panel full form is a Variable Frequency drive panel also known as VFD and soft starter Control Panel. Variable Frequency drive panel designed to control the speed of the electric motor and feed pump. VFD and soft starter are widely used in drilling, pumping, and other large machine applications. The VFD and soft starter panels widely used in tube mills, paper mills, extruder plants, rolling Mills, cable industry, and CTL Lines. Also, VFD panels installed in hospitals, business houses, and other public places.
How Does VFD and Soft Starter Work
The working out on best solution for given application is what we have for you in case of VFD panels. Advantages like reduced energy consumption & extended life and low maintenance product a favorite choice of users. Accu-panels can provide you with appropriate solution based on your requirement. Providing dust proof enclosure’s ,maintaining internal ambient along with necessary protection for VFD Panel is what we serve industry for enhanced performance of VFD.
Accu-Panels Energy engineers and manufactures VFD panels and soft starter panels that house the drive or starter with its line protection, input/output reactors or filters, bypass arrangement, cooling and control interface in an IEC 61439 enclosure. Panels are built for pumps, fans, compressors, conveyors, crushers and extruders from 0.75 kW to 1000 kW, as stand-alone units or as modules inside an MCC, at our CPRI type-tested Ahmedabad works.
- MCCB or fuse-switch line protection with semiconductor fuses where required by the drive maker
- Input line reactor or passive harmonic filter (THDi 5–8 %) and output dv/dt or sine filter for long motor cables
- Bypass contactor scheme (DOL or soft-starter bypass) for continued operation during drive maintenance
- Forced ventilation with filtered louvres, or air-conditioned enclosure for dusty / hot sites; heat-load calculated per drive losses
- Local HMI, speed potentiometer / auto-manual, PLC and SCADA interface (Modbus RTU/TCP, Profibus, Ethernet/IP)
- EMC-compliant layout: segregated power and control wiring, shielded cable glands, EMC plates
- Assembly per IEC 61439-1/2; drives per IEC 61800-5-1; soft starters per IEC 60947-4-2; CPRI type-tested platform
- 415 V AC, 3-phase, 50 Hz (690 V on request); control 24 V DC / 230 V AC
- Drive range 0.75 kW to 1000 kW; soft starters 7.5 kW to 1000 kW
- Short-time withstand 25 kA to 65 kA for 1 s at line side
- IP42 / IP54 with forced cooling; IP55 with heat exchanger or AC; IEC 60529
- 2.0 mm CRCA frame, 1.6 mm doors; 7-tank pre-treatment, powder coated; free-standing or wall-mounted
VFD panels where speed or flow control saves energy: water and wastewater pumps, HVAC fans and chillers, boiler ID/FD fans, conveyors, extruders, compressors and cranes. Soft starter panels where only smooth starting is needed at fixed speed: large pumps, fans, compressors, crushers and mills, reducing starting current to 300–400 % of rated and eliminating mechanical shock. Both are supplied within MCCs or as stand-alone panels alongside detuned APFC to control harmonics.
VFD or soft starter?
If the process benefits from running at reduced speed for long periods — pumps and fans following an affinity-law curve — a VFD typically pays back within 1–2 years through energy savings. If the motor runs at full speed once started, a soft starter gives smooth acceleration at a third of the cost and without harmonics. Our engineers size either from the motor nameplate, load torque curve and duty cycle.
Frequently asked questions
Do VFD panels need harmonic filters?
Six-pulse drives draw 30–40 % THDi. Where drives are a large share of the load, or the DISCOM / IEEE 519 limits apply, we add line reactors, passive filters or specify active front-end drives.
How is enclosure cooling sized?
From the drive’s published heat loss (typically 2–3 % of rated kW). Below about 1 kW loss filtered fans suffice; above that, heat exchangers or panel air conditioners are used for IP54/IP55 panels.
Can you integrate with our PLC?
Yes. Hard-wired I/O or fieldbus (Modbus, Profibus, Ethernet/IP, Profinet) as your automation vendor requires.
Which drive makes do you use?
We build with the leading global drive brands per your approved vendor list.
Send your motor list with kW, duty and control requirement to our team for a VFD / soft starter panel proposal.
