Variable Frequency AC Power Supply Manufacturers & Exporters

Name: Variable Frequency AC Power Supply
Brand: Powertron

POWERTRON manufactures variable frequency AC power supply systems in India from 10kVA to 60kVA single phase and 15kVA to 300kVA three phase, for manufacturers who need to test equipment at a frequency other than the one coming out of the wall. Indian mains runs at 50Hz; much of North America, Japan and Saudi Arabia runs at 60Hz. Any exporter shipping motors, pumps, appliances or industrial equipment into those markets has to prove the product works there before it ships, and that requires a source that generates 60Hz on demand rather than converting it. Output voltage and frequency are both programmable, with distortion held to 1%, overload capacity up to three times rating for motor starting, soft start to limit inrush, and a 7-inch colour touch screen for operation. Manufactured and load-tested in-house at Wagle Estate, Thane, Maharashtra.

Variable Frequency AC Power Supply

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Key Features of the POWERTRON Variable Frequency AC Power Supply :

Programmable frequency output including 50Hz, 60Hz and custom values — one source validates a product for every destination market rather than requiring a separate arrangement per country.
Overload capacity up to three times rating — a motor draws several times its running current at start, and this headroom means the source can be sized to the running load rather than to the starting surge, which materially reduces the capital cost of the test bench.
Soft start prevents excessive motor starting current — the output ramps under control so the motor accelerates without the inrush spike that would otherwise trip the supply or stress the DUT.
Voltage distortion as low as 1% — the device under test sees a supply cleaner than site mains, so a test failure reflects the product rather than the quality of the power feeding it.
7-inch true colour touch screen — set points, stored sequences and live measurement are read and entered on one screen, which shortens operator training and reduces set-up error.
Standard programming function for frequency sequencing — multi-step frequency profiles run from a single trigger rather than being stepped manually.
RS232 standard with RS485 and Ethernet optional — the source integrates into an existing automated test environment.
Automatic fan speed control — cooling tracks actual thermal load, so acoustic noise in the test hall is proportional to duty rather than constant at full speed.
Single phase 10kVA to 60kVA and three phase 15kVA to 300kVA — the widest capacity envelope in the POWERTRON AC range.

Automotive & Ev Industries

Automation & Machinery

Aerospace & Defence

Railways

Renewable Energy System

Electrical Appliance Testing

Technical Specifications — Variable Frequency AC Power Supply

Parameter	Specification	What It Means For You
Capacity — Single Phase	10, 15, 20, 30, 45 and 60 kVA	Bench and single-phase machine testing
Capacity — Three Phase	15 kVA to 300 kVA	Machine-level and full test-cell installations
Output Voltage — 1 Phase	0-300 VAC	Covers all common single-phase destination voltages
Output Voltage — 3 Phase	Phase 0-300 VAC, Line 0-520 VAC	Covers 208V, 380V, 400V, 415V and 480V systems
Frequency	Programmable, including 50Hz, 60Hz and custom values	Destination-market frequency generated on demand
Voltage Distortion	As low as 1%	DUT tested against a supply cleaner than site mains
Overload Capacity	Up to 3x rating	Source sized to running load, not to motor starting surge
Soft Start	Standard	Controlled acceleration without inrush tripping the supply
Operator Interface	7-inch true colour touch screen	Set points, sequences and measurement on one screen
Programming	Standard programmable frequency control	Multi-step frequency profiles from a single trigger
Communication	RS232 standard; RS485 and Ethernet optional	Integrates into existing automated test environments
Cooling	Automatic fan speed control	Noise proportional to duty rather than constant
Customisation	Capacities and configurations to order	Test cells sized to the application

Available Variants

Model	Voltage	Current (Low/High)	Power
PIPL-10KVFA-1PH	0-300VAC	90A/45A	10kVA
PIPL-15KVFA-1PH		136A/68A	15kVA
PIPL-20KVFA-1PH		182A/91A	20kVA
PIPL-30KVFA-1PH		272A/136A	30kVA
PIPL-45KVFA-1PH		408A/204A	45kVA
PIPL-60KVFA-1PH		544A/272A	60kVA
PIPL-15KVFA-3PH	Phase voltage 0-300VAC Line voltage 0-520VAC	45A/22.5A	15kVA
PIPL-30KVFA-3PH		90A/45A	30kVA
PIPL-45KVFA-3PH		136A/68A	45kVA
PIPL-60KVFA-3PH		182A/91A	60kVA
PIPL-90KVFA-3PH		272A/136A	90kVA
PIPL-120KVFA-3PH		362A/181A	120kVA
PIPL-150KVFA-3PH		454A/227A	150kVA
PIPL-180KVFA-3PH		545A/272A	180kVA
PIPL-240KVFA-3PH		724A/362A	240kVA
PIPL-300KVFA-3PH		908A/454A	300kVA
WE ALSO PROVIDE CUSTOMIZED SOLUTION

Which Configuration Do You Need?

Configuration	Capacity	Current (Low/High)	Typical Application
Single Phase	10-20 kVA	90A-182A / 45A-91A	Single-phase appliance and small motor export testing
Single Phase	30-60 kVA	272A-544A / 136A-272A	Larger single-phase machinery, pump and compressor testing
Three Phase	15-45 kVA	45A-136A / 22.5A-68A	Three-phase component and small drive testing
Three Phase	60-120 kVA	182A-362A / 91A-181A	Motor and machinery type testing, railway sub-systems
Three Phase	150-300 kVA	454A-908A / 227A-454A	Full machine and vehicle-level test cells, heavy industrial equipment
Customised	On application	On application	Dedicated test facilities and non-standard configurations

How a Variable Frequency AC Power Supply Works

A variable frequency AC power supply is a frequency converter that regenerates the output waveform rather than manipulating the input. Incoming mains at 50Hz is rectified and filtered to an internal DC bus. At that point the original frequency has been discarded entirely — the DC bus carries no frequency information. An inverter stage then synthesises a new AC waveform from that bus at whatever frequency the controller is programmed to produce, and an output filter removes the switching components.

This double-conversion architecture is why the output frequency is completely independent of the input. A 60Hz output is not derived from the 50Hz input by any ratio or multiplication; it is generated fresh. The same applies to voltage and to waveform shape. That independence is the entire commercial value of the product for an exporter: a pump built in Maharashtra can be run at 60Hz and 220V on the factory floor exactly as it will run in its destination market, and any problem is found before the container ships rather than after it lands.

Motor loads drive two specific design features. Soft start ramps the output voltage under control so the motor accelerates progressively instead of drawing a full locked-rotor inrush at the instant of switch-on. Overload capacity of up to three times rating handles what inrush remains. Together these mean the source can be specified against the motor running load rather than against its starting surge — which is the difference between a 30kVA unit and a 90kVA unit for the same motor, and a substantial difference in capital cost.

Automatic fan speed control tracks actual power stage temperature rather than running continuously at full speed, which matters in a test hall where staff work alongside the equipment all shift.

Applications by Industry

Frequency conversion is specified for one of three reasons: validating a product for an export market that runs at a different frequency, testing equipment designed to operate at a non-standard frequency, or characterising how a product behaves across a frequency range. The rows below map each of those onto real sectors.

Industry	Application	Reason for Frequency Variation	Configuration
Motor & Pump Export	Type testing at 60Hz before shipment to US, Japan or Gulf markets	Destination market frequency	1-Ph 10-60 kVA or 3-Ph 45-150 kVA
Automotive & EV	Charger and on-board system validation across supply frequencies	Multi-market validation	3-Ph 90-300 kVA
Automation & Machinery	Machine and drive testing at destination frequency	Export qualification	3-Ph 60-180 kVA
Aerospace & Defence	Ground support and avionics ancillary testing	Non-standard operating frequency	1-Ph or 3-Ph, custom
Railways	Traction auxiliary and signalling equipment validation	Non-standard supply frequency	3-Ph 90-300 kVA
Renewable Energy	Inverter and converter behaviour across frequency deviation	Grid-code response testing	3-Ph 60-180 kVA
Electrical Appliance Testing	Appliance certification for multiple export markets	Destination market frequency	1-Ph 10-30 kVA
Contract Manufacturing	Production-line functional test for export orders	Per-order destination frequency	1-Ph or 3-Ph per line

Variable Frequency AC Power Supply vs VFD vs Rotary Frequency Converter

Criteria	Variable Frequency AC Power Supply	VFD (Variable Frequency Drive)	Rotary Frequency Converter
Purpose	Laboratory-grade AC source at any frequency	Speed control of one specific motor	Bulk frequency conversion
Output Waveform	Clean sine, distortion as low as 1%	PWM chopped, high harmonic content	Sine, but load-dependent
Suitable for Testing?	Yes — designed as a test source	No — output is not a valid test supply	Partially, with poor regulation
Voltage Control	Independent of frequency	Locked to frequency by V/f ratio	Limited
Load Compatibility	Any AC load — motors, electronics, appliances	Motors only	Motors and simple loads
Programmability	Full sequencing and stored profiles	Drive parameters only	None
Measurement	Integrated V, I and power measurement	Drive diagnostics only	External instruments needed
Efficiency & Noise	Solid state, automatic fan control	Solid state	Rotating machine, high noise and maintenance

How to Select a Variable Frequency AC Power Supply

Destination frequency and voltage — the exact combination the product must be validated at, for every market you ship into, not just the primary one.
Motor running load versus starting load — quote both. With 3x overload capacity the source is sized against the running load, which can halve the capacity you need to buy.
Phase configuration — single phase up to 60kVA or three phase up to 300kVA, and whether a neutral is required.
Load type — motors, electronics, appliances or mixed. Non-linear switch-mode loads draw peaky current and need crest factor headroom.
Frequency sequencing requirement — whether the test procedure sweeps or steps frequency, which determines whether the programming function is needed.
Communication interface — RS232 is standard, with RS485 and Ethernet optional. Specify at order so the unit ships configured.
Measurement requirement — whether the source must report power, power factor and harmonic content or only voltage, current and frequency.
Installation constraints — floor area, incoming supply rating, cable routing and test hall ambient temperature.
Duty cycle — intermittent export qualification or continuous production-line operation, which changes the thermal design and fan specification.

Custom Variable Frequency AC Power Supply Builds

The catalogue already spans 10kVA single phase to 300kVA three phase, and the live page states that customised solutions are provided. In practice that covers capacities above 300kVA for dedicated export test facilities, extended frequency envelopes for aerospace and marine applications, four-wire three-phase configurations with neutral, non-standard input voltages for overseas installations, and matched command sets where the source must integrate into an existing test sequencer.

Mechanical customisation covers cabinet layout to suit the test hall footprint, cable entry direction, alternative cooling arrangements for high-ambient installations, and interlocks tied into test-cell access. Preloaded frequency and voltage profiles for a customer’s specific export markets can be configured at the factory, so an operator selects a destination rather than entering parameters. Share the destination frequency and voltage combinations, load kVA and type, phase configuration, interface and installation constraints for a firm proposal.

Manufacturing, Quality and Export Capability

POWERTRON INDIA PVT. LTD. designs and manufactures its complete AC power supply range at Plot No. A-426/427, Road No. 28, Wagle Estate MIDC, Thane West 400604, Maharashtra. Design, magnetics winding, PCB assembly, enclosure fabrication and final load testing are all carried out in-house, which is what allows both short lead times and genuine engineering support after the sale rather than component-level replacement only.

Every unit is tested on load across its full output envelope before dispatch, with the test record supplied against the serial number. The company holds ISO, CE and BIS certifications, is MSME registered and GeM listed, and manufactures under the Make in India framework — making POWERTRON a practical import substitute for organisations currently sourcing AC test sources from overseas. Domestic sales and service offices operate in Delhi, Pune, Hyderabad, Bangalore and Tamil Nadu, with international offices in Dubai, Singapore and Malaysia supporting export customers across the Middle East, Southeast Asia, Africa and Europe.

Frequently Asked Questions — Variable Frequency AC Power Supply

What is a variable frequency AC power supply used for? +

It generates AC output at a frequency independent of the incoming mains, which allows equipment to be tested at the frequency of its destination market. Indian mains runs at 50Hz; much of North America, Japan and the Gulf runs at 60Hz. An exporter uses this source to prove a product works at 60Hz before it ships.

Can it convert 50Hz to 60Hz? +

Yes. That is the most common application. The incoming 50Hz supply is rectified to a DC bus, discarding the original frequency entirely, and a new waveform is synthesised at 60Hz or any other programmed frequency. The output frequency is generated, not derived from the input.

Is this the same as a VFD? +

No. A VFD produces a PWM-chopped output intended solely to control the speed of one specific motor, and its output is not a valid test supply for anything else. A variable frequency AC power supply produces a clean sine wave with distortion as low as 1% and is designed as a laboratory-grade source for any AC load.

What capacities are available? +

Single-phase models cover 10, 15, 20, 30, 45 and 60kVA. Three-phase models cover 15kVA to 300kVA. Customised capacities above 300kVA are built for dedicated test facilities.

What does 3x overload capacity mean in practice? +

The source can deliver up to three times its rated output briefly, which covers the inrush a motor draws at start. This means the unit is sized against the motor running load rather than its starting surge — often the difference between specifying a 30kVA unit and a 90kVA unit for the same motor.

What does the soft start feature do? +

It ramps the output under control at switch-on so the motor accelerates progressively rather than drawing full locked-rotor current instantly. This protects both the device under test and the source, and prevents nuisance tripping on a bench that starts motors repeatedly.

Can the frequency be programmed to sweep or step automatically? +

Yes. The standard programming function stores multi-step frequency profiles that run from a single trigger, so a sweep or step sequence executes without the operator adjusting the set point manually at each stage.

What communication interfaces are available? +

RS232 is standard on every unit, with RS485 and Ethernet available as options. Specify the required interface at order so the unit is factory-configured rather than reworked on site.

Will it drive a three-phase motor for type testing? +

Yes. Three-phase models from 15kVA to 300kVA are built for exactly this, with programmable phase voltage from 0-300VAC and line voltage from 0-520VAC. Size against the motor running load, taking advantage of the overload capacity for starting.

What should I send with an enquiry? +

The destination frequency and voltage combinations required, load kVA at running and starting conditions, load type, phase configuration, whether frequency sequencing is needed, interface requirement, and installation constraints including floor area and available incoming supply.

Need a Variable Frequency AC Power Supply?

Request a quotation for a variable frequency AC power supply. Send your destination frequency and voltage, load kVA at running and starting conditions, phase configuration, interface and installation constraints to sales@powertrondcps.com, or call +91 8097707496 / +91 7208560460. POWERTRON quotes single-phase 10kVA to 60kVA, three-phase 15kVA to 300kVA and custom builds above.

sales@powertrondcps.com | +91 8097707496 | +91 7208560460

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