Loading Rheostat 50KW 440V AC Three Phase

Product Code : SCL-EAE-12050

Loading Rheostat 50KW 440V AC Three Phase (SKU SCL-EAE-12050) is a high-power, floor-mounted resistive load bank that absorbs up to 50 kW from a 440 V three-phase source, for full-load tests on generators, transformers and distribution systems. It serves engineering students and laboratory technicians in electrical engineering laboratories. Science Lab Supplies manufactures this rheostat at its factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and supplies engineering institutions, tender contractors and distributors directly.

Specifications

Each specification is shown on its own row below. In short, nickel-chromium alloy coils rated for 50 kW continuous at 440 V, selectable in star or delta, sit in a powder-coated steel enclosure on locking castors, cooled by axial fans and guarded by breakers and over-temperature cutouts.

Applications and Experiments for the 50 kW Loading Rheostat

The rheostat lets a class load an industrial-scale three-phase source in controlled steps and record how voltage, current and efficiency change up to 50 kW. It is suited to B.Tech, diploma and advanced vocational power laboratories that test full-size alternators, three-phase transformers and inverter-based systems at realistic ratings.

• Alternator performance: applying large resistive loads to an industrial alternator and recording voltage regulation drops on an Analog Ampere Meter Panel Mount and voltmeter.
• Transformer efficiency: loading a three-phase secondary progressively to evaluate copper loss, for instance on a Three Phase Mobile Transformer.
• Microgrid and inverter studies: providing a predictable power sink while renewable-energy control systems stabilise.

This is a high-voltage, high-heat unit: keep 1.5 m clear around the exhaust grilles, bond the earth stud before use and allow only trained staff to operate it.

Standard Scope of Supply

Each rheostat comes on its pre-installed industrial castor array, with four high-current insulated connection cables with copper lug terminations and an English operational manual covering schematics and experiment setups. The three-phase source under test and the panel meters are separate items for the quotation.

Packing, MOQ and Lead Time

Ask for a quotation on a single 50 kW unit or on several for a high-power test bay. Each one states the packing, delivery time and price for that quantity, and Science Lab Supplies, a science apparatus manufacturer in India, can add meters, transformers or smaller load banks.

As the holder of an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Sri Lanka, Vietnam, Malaysia, Peru, Egypt and Iraq. Send requirements through our contact page or enquiry cart, and see the lab tender page if you are buying against a tender.

Frequently Asked Questions

What current does it draw per phase?
At 440 V AC three phase and the full 50 kW, the rheostat draws approximately 65.6 A on each phase, so the supply, cables and protection must be sized for that current.

What happens if the ventilation fails?
An active thermal cutoff disconnects the resistor grid if airflow drops or the core temperature passes its safe margin. Keep the intake and exhaust screens free of fibres and dust.

How should the unit be shut down after a heavy run?
Disengage the load steps first and leave the cooling fans running for at least five to seven minutes to clear residual heat before switching off the incoming supply.

Who builds the 50 kW rheostat?
Science Lab Supplies, a laboratory equipment manufacturer in India, builds it in its own factory at Saha, Ambala, India. As the actual manufacturer, it can answer technical questions and price the unit without any trading intermediary.

Related Load Banks and Power-System Apparatus

These resistive and combined loads, a transformer module and a protection trainer from the Electrical and Electronics and Electrical Power System ranges cover smaller ratings and the companion apparatus for full-load testing, and they can be priced together with the rheostat.

• Loading Rheostat 12KW 220V AC Single Phase — 12 kW nickel-chromium resistive load at 220 V, fan-cooled, on castor wheels.
• Loading Rheostat 10KW Single Phase — 10 kW resistive loading for generator and machine tests.
• Resistive Load Bank 240V AC — bench load up to 3 kW with ceramic-sheathed or wire-wound resistors and a thermal trip.
• Portable Resistive Load Bank — three-bank resistive load for balanced and unbalanced three-phase tests, with carrying handles.
• Power Factor Load Bank — voltage-selector switch for single- and three-phase circuits at different line voltages.
• Transformer Trainer — instrumented module with single- and three-phase educational transformers and selectable loads.
• Circuit Breaker Trainer — four protection circuits with fuses and magnetic, thermal and thermomagnetic breakers.

Browse the full Electrical and Electronics range, the Electrical Power System range, or all physics lab equipment.

Last updated: 9 October 2026