Loading Rheostat 12KW 220V AC Single Phase

Product Code : SCL-EAE-12043

Loading Rheostat 12KW 220V AC Single Phase (SKU SCL-EAE-12043) is a heavy-duty, floor-standing resistive load that absorbs up to 12 kW from a 220 V single-phase source, so generators, transformers and distribution circuits can be tested at high power. It serves engineering students and laboratory technicians. Science Lab Supplies manufactures this rheostat in Saha, Ambala, India, at Plot 448, HSIIDC Industrial Area, and quotes it without intermediaries to engineering colleges, institutes, tender contractors and distributors.

Specifications

The complete specification is set out in the table below. In short, nickel-chromium resistor elements rated for 12 kW continuous at 220 V sit in a ventilated, powder-coated steel frame on locking castors, cooled by axial fans and protected by a thermal trip and overcurrent breakers.

Applications and Experiments for the 12 kW Loading Rheostat

The rheostat applies a large, predictable real-power load so students can watch how a single-phase source holds its voltage as current rises towards 54.5 A. It belongs in B.Tech, diploma and advanced vocational power labs that test standby generators, transformers and protection settings at realistic power levels.

• Generator testing: real-power load runs on single-phase backup generators, logging current on an Analog Ampere Meter Panel Mount.
• Transformer work: plotting regulation and efficiency, for example on a Single Phase Mobile Transformer.
• Protection studies: a steady load for checking relay settings and breaker responses alongside the Circuit Breaker Trainer.

This is high-current mains equipment: keep about one metre clear around the grilles, and only trained staff should connect or run it.

Standard Scope of Supply

The rheostat is supplied with its high-current input power cable assembly, two heavy-duty insulated connection leads with copper terminal lugs and an English operations manual covering installation and experiment setups. The four locking castors are fitted to the frame, and the source under test and panel meters are quoted separately.

Packing, MOQ and Lead Time

You can request a quotation for a single rheostat or for several units to equip a power-systems laboratory. Every quotation shows the packing, delivery time and price for that quantity, and Science Lab Supplies, a science apparatus manufacturer in India, can add meters or transformers to the same document.

Using its Importer-Exporter Code, Science Lab Supplies can ship to buyers in the Philippines, Nepal, Bangladesh, Zambia, Rwanda and South Africa. Tell us your requirement on the contact page or through the enquiry cart; tender buyers will find the process on the lab tender page.

Frequently Asked Questions

How much current does it draw at full load?
At 220 V AC and the full 12 kW, the rheostat draws approximately 54.5 A, so the source, cables and protection on the test circuit must be rated for that current.

What happens if the cooling fans stop during a test?
A thermal protection interlock cuts power to the resistor bank if airflow drops or the internal temperature passes its safe limit. The axial fans run from the same 220 V input line.

How long should the fans run after a test?
Turn off the load steps first, then let the fans run for a full five minutes before switching off. Never stop the cooling while the nickel-chromium elements are still hot.

Who manufactures the 12 kW rheostat?
Science Lab Supplies, a laboratory equipment manufacturer in India, builds it at its own factory in Saha, Ambala. Because there is no trading house in between, quotations come directly from the people who make the unit.

Related Load Banks and Power-System Apparatus

These loads, machines and meters from the Electrical and Electronics and Electrical Power System ranges suit the same high-power tests, either as alternative ratings or as the sources and instruments used with the rheostat, and they can share one quotation.

• Loading Rheostat 50KW 440V AC Three Phase — 50 kW, 440 V three-phase resistive load with forced-air cooling.
• Loading Rheostat 10KW Single Phase — 10 kW resistive loading for generator and machine tests.
• Resistive Load Bank 240V AC — 3 kW, 240 V single-phase bank with five switched steps and fan cooling.
• Portable Resistive Load Bank — three switchable resistor banks with thermal circuit-breakers, for star or delta loads.
• Power Factor Load Bank — separate resistive, inductive and capacitive banks with a voltage selector, on small wheels.
• Salient Pole Generator — prime mover and generator set on a common bed-plate, with synchroscope and load banks.
• Analog Power Measuring Meter — shows circuit power on an analogue scale.

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

Last updated: 9 October 2026