Trans-Ratio Manufacturer,Supplier and Exporter in India

Trans-Ratio (Product Code: SLE/EAM/30) is a fully self-contained transformer system that lets students investigate turns ratios and efficiency with the minimum of complication. The primary coil is tapped at 200, 400 and 600 turns and the secondary at every hundred turns from 100 to 600, with all tappings brought out to 4mm sockets, so dozens of ratios can be set up simply by moving leads. Manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, it is a ready-to-use transformer experiment kit for school and college laboratories, supplied with full instructions and experiment details.

Specifications

Typical Use

Connect an AC supply of up to 6V across a chosen primary tapping and an AC voltmeter across a secondary tapping, then compare the voltage ratio with the turns ratio. Using the 200-turn primary with the 400-turn secondary gives a step-up of two; swapping to the 600-turn primary with the 100-turn secondary shows a strong step-down. Working through several combinations, students tabulate Vs/Vp against Ns/Np and see the transformer equation emerge from their own data, while differences from the ideal ratio open a discussion of flux leakage and losses.

With AC ammeters added in both circuits, the same unit supports efficiency measurements by comparing input and output power. Teachers also use it to show electromagnetic induction in its simplest form: no connection between the coils except the changing magnetic field. As a transformer experiment kit for school use it avoids the loose cores and clamps of demountable sets, which keeps practical time focused on the physics. Always use AC, never DC, and keep the input within the stated limit.

Manufacturer

Trans-Ratio is produced by Jain Scientific Equipments Private Limited, the Ambala, Haryana company behind the ScienceLab brand of teaching apparatus for physics, electricity and magnetism. Learn more on our company profile.

Related Electricity and Magnetism Equipment

Supply and measuring instruments for transformer practicals:

• Power Supply, Stepped — a low-voltage AC/DC bench supply; use its AC output within the unit’s limit
• Analogue Voltmeter AC — monitors primary and secondary voltages
• Analogue Ammeter AC — measures currents for efficiency calculations
• Digital Multimeter — a second meter so both coil voltages can be read at once
• Demountable Transformer Kit — for follow-up work on cores and coil construction

More induction apparatus is available in our Electricity and Magnetism category.

Frequently Asked Questions

Which turns ratios can be set?
Any combination of primary tappings at 200, 400 or 600 turns with secondary tappings at 100, 200, 300, 400, 500 or 600 turns, giving both step-up and step-down ratios.

What supply does it need?
An AC supply of up to 6V. A DC supply will not produce transformer action.

Are meters included?
No. AC voltmeters are required for monitoring, and AC ammeters are useful for efficiency work; these are ordered separately.

Does it come with instructions?
Yes, full instructions are supplied with experiment details, which helps teachers new to the apparatus plan a practical quickly.

How large is the unit?
It measures 180 x 100 x 75mm, compact enough for a student bench with meters and supply alongside.

Is a calibration certificate available?
The unit is a teaching transformer rather than a measuring instrument; for any documentation needs, discuss certificate availability with us before ordering.

Can you supply class sets for India and overseas?
Yes. We quote for schools, colleges and distributors in India and international markets; include quantity and destination in your enquiry.

Request a Quote

Request a quotation for Trans-Ratio through our contact page, or add it with suitable meters and a power supply to the enquiry cart.

Last updated: 24 September 2026