AC Drive and VFD Supplier in Coimbatore: Buying Guide

Key Takeaways

Pump test benches, blowers, compressors and textile machines in Coimbatore all benefit from an AC drive.
RB Automation supplies Schneider Electric Altivar and Frecon VFDs to Coimbatore from Ahmedabad.
Size the drive by motor current and load type first, then supply, control signals and braking.
On a pump test bench, a VFD lets one bench test several duty points and motor ratings.

Coimbatore makes motors and pumps for the rest of the country, and its own plants are full of them: test benches at pump factories, cooling water pumps and dust collector fans in foundries, compressors in machine shops and long rows of motors in textile mills. An AC drive gives each of these a soft start and adjustable speed. RB Automation is an AC drive and VFD supplier in Coimbatore, supplying Schneider Electric Altivar and Frecon drives from our Ahmedabad base and sizing them from your motor nameplate over phone, WhatsApp or email.

Where Coimbatore Uses VFDs

Pump test benches at Thudiyalur, Kovilpalayam and Chinniampalayam

A pump maker has to test many models at several duty points. With a drive on the bench, one set-up can run each pump at the speeds and loads the test calls for, while a PLC steps through the sequence and pressure transmitters and a flow meter record the results.

Foundries and engineering plants at Arasur and Sulur

Furnace cooling water pumps, dust collector blowers, sand plant conveyors and screw compressors are typical loads. Conveyors and compressors are constant torque, so the drive must be chosen with enough overload margin.

Textile mills

Spinning and winding machines, humidification plants and exhaust fans run for long shifts, so steady speed and lower power draw both pay back.

Water and buildings

Borewell and booster pumps, cooling towers and air handling fans in factories and commercial buildings across the district.

How a Drive Changes Motor Behaviour

An induction motor's speed follows the frequency of its supply. A VFD rectifies the incoming mains and builds a new output with adjustable frequency and voltage, so speed can be set from a keypad, an analogue signal or a PLC. The motor ramps up without the inrush of a direct-on-line start, stops under control and is protected against overloads. Fans and centrifugal pumps gain most, because the power they absorb falls steeply as they slow.

Schneider Electric and Frecon Drives

RB Automation is an authorised Schneider Electric partner. From Schneider we supply the Altivar low voltage AC drive and the Altivar general purpose AC drive, a natural fit for sites whose panels and PLCs are already Schneider; the Schneider AC drive page has more.

From Frecon we offer the FR01 smart inverter, FR150A, FR500A and a line of low power AC drives for small machine motors, plus the FR150T/FR500T solar (PV) water pump inverter, all shown on the Frecon AC drive page.

Six Things to Know Before Ordering a VFD

Nameplate current: select the drive on full-load amps and voltage first, then check kW.
Kind of load: pumps and fans are variable torque; conveyors, mixers, compressors and positive displacement pumps are constant torque.
Incoming supply: single-phase or three-phase, and its voltage.
How speed is set: keypad, potentiometer, 4-20 mA, digital inputs or a serial link.
Stopping: heavy fans or flywheels that must stop quickly may need a braking resistor.
Surroundings: panel heat, foundry dust, cotton fluff and the cable run to the motor.

Keeping Drives Running in Dusty Plants

Foundry dust and textile fluff clog heat sinks and filters faster than almost anything else. Filtered ventilation, regular cleaning, tight terminals and a saved parameter file prevent most breakdowns. Our low voltage AC drive maintenance checklist sets out the routine.

A Typical VFD Application in Coimbatore

Consider a typical foundry in the Arasur or Sulur belt where the induction furnace's cooling water pump runs flat out day and night, and flow is trimmed by a half-closed valve. Fit an AC drive, use the water outlet temperature or line pressure as the reference, and the pump can slow down whenever the furnace is idle or the weather is mild. Power use drops, the valve can stay fully open, and the soft start ends the current surge every time the pump starts. The same thinking applies to the dust collector fan, which is often sized for the worst case and held back by a damper the rest of the time.

Schneider or Frecon for Your Coimbatore Plant?

If your situation is	Consider
The plant already runs Schneider PLCs, switchgear and Altivar drives	Altivar low voltage or general purpose AC drive
A pump test bench or utility pump that needs a straightforward speed control	Altivar general purpose, or Frecon FR150A / FR500A
A compact machine with a small motor	Frecon FR01 smart inverter or Frecon low power AC drives
Industrial or process duty on larger loads	Frecon FR500A or a Schneider Altivar range

Every series has its own power and supply options, listed on the product pages; the motor nameplate tells us which model fits.

Coimbatore Loads by Torque Type

Torque type	Coimbatore examples	What the drive needs
Variable	Centrifugal pumps on test benches, cooling water pumps, dust collector and humidification fans	Normal duty rating; biggest savings when slowed
Constant	Sand plant conveyors, mixers, screw compressors, positive displacement pumps	Full torque at low speed and extra overload margin

Send These Details for a VFD Quote

Nameplate data: kW, full-load amps, voltage
Type of load and how often it starts and stops
Incoming supply: single-phase or three-phase
How speed will be set: keypad, analogue, digital inputs or PLC link
Brand preference, Schneider or Frecon, and the number of drives

VFD Errors We Often Come Across

Picking a drive on kW alone, without looking at current or load type.
Sealing the drive inside a cabinet in a dusty foundry or fluff-filled textile shed.
Running long unscreened motor cables and ignoring output filters.
Braking a heavy fan or flywheel quickly with no braking resistor.
Never saving the parameter set, so a replacement has to be programmed from memory.

Why Choose RB Automation for AC Drives

Carrying two drive brands lets us recommend Schneider where a plant has standardised on it and Frecon where it suits the machine or the budget better. We also supply the PLCs, HMIs, pressure transmitters and flow meters that surround the drive. We have no Coimbatore office; nameplates and application details are reviewed remotely from Ahmedabad. See our PLC guide for Coimbatore and the industrial automation supplier in Coimbatore page.

Conclusion

From a pump test bench to a foundry blower, a correctly sized VFD protects the motor, steadies the process and often reduces the power bill. Send RB Automation your motor nameplate and load type, and we will recommend a Schneider or Frecon drive for your Coimbatore application.

Looking for a quote in Coimbatore? Contact RB Automation at +91 8511104864, WhatsApp +91 9898739737 or email contact@rbautomate.com. We call back Monday to Saturday, 10:00 am to 6:00 pm.

More Buying Guides for Coimbatore

Frequently Asked Questions

Which AC drives do you supply to Coimbatore?

We supply Schneider Electric Altivar low voltage and general purpose AC drives, and Frecon FR01, FR150A, FR500A, FR150T/FR500T and low power AC drives, dispatched from Ahmedabad.

Can a VFD be used on a pump test bench?

Yes. A drive lets the bench run the pump at different speeds and duty points, and a PLC can control the sequence while transmitters and a flow meter record the readings. Share the largest motor you test so we can size the drive.

What size of VFD do I need for my motor?

Start from the motor's full-load current and voltage, then check the load type. Constant torque loads such as conveyors and compressors, and frequent starts, need more overload capacity than pumps and fans.

How do I protect a VFD in a dusty foundry or textile mill?

Use a panel with filtered ventilation, clean the filters and heat sinks regularly, keep terminals tight and save a copy of the drive parameters.

What is the price of a VFD in Coimbatore?

There is no fixed price list. The price depends on the brand, power rating, supply, options and quantity. Use the form on this page, call +91 8511104864 or email contact@rbautomate.com for a quotation.

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