Demountable Transformer Manufacturer,Supplier and Exporter in India
Product Code : EL-SLE-5797
Jlab Export is a leading Demountable Transformer Manufacturer,and suppliers in India
Demountable Transformer (code EL-SLE-5797) is a teaching transformer that students can take apart to see how a transformer works, used in school and college physics and ITI electrical labs. It has one mains coil for 240 V, 50 Hz with 2400 turns and two interchangeable secondary coils of 65 and 130 turns, giving outputs of about 6 V and 12 V at up to 2 A. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Mains (primary) coil | One coil, 240 V, 50 Hz, 2400 turns |
| Secondary coils | Two, interchangeable: 65 turns and 130 turns |
| Outputs | About 6 V (65-turn coil) and about 12 V (130-turn coil) |
| Maximum output current | 2 A |
| Core, clamp and terminals | Not described in this listing — confirm with your quotation |
| Quality check | Each transformer is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-SLE-5797 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Does It Compare with Other JLab Teaching Transformers?
| Transformer | Coils as listed | Other listed details |
|---|---|---|
| This transformer (EL-SLE-5797) | Mains coil of 2400 turns; interchangeable secondaries of 65 and 130 turns | About 6 V and 12 V outputs, 2 A maximum |
| Transformer (physics lab range) | Mains coil for 240 V, 50 Hz; interchangeable coils of 200 and 800 turns and of 400 turns | Coils for exploring different turns ratios |
| Demountable Transformer (large-scale) | Coils with intermediate tappings giving many ratios; one coil fitted with a mains cable | U-shaped core of high-permeability sheet closed by two clamps |
| Demonstration Transformer | One main coil with cord and plug; three secondary coils used one at a time | 4 mm socket terminals on each secondary |
Choose this transformer when you want two ready-made low-voltage outputs that match common 6 V and 12 V apparatus. The tapped large-scale model offers many ratios for demonstrations, and the demonstration transformer offers three secondaries with 4 mm sockets.
What Is the Demountable Transformer Used For?
A transformer changes an alternating voltage in proportion to the turns on its coils: Vs / Vp = Ns / Np. With 2400 turns on the 240 V mains coil there are 0.1 V per turn, so an ideal transformer would give 6.5 V from the 65-turn coil and 13 V from the 130-turn coil. The listed outputs of about 6 V and 12 V are a little lower, which lets students discuss real-world losses in the windings and the core and the leakage of magnetic flux. Swapping the interchangeable secondaries shows directly that doubling the turns doubles the output voltage. The apparatus supports the transformer topic in class 12 physics (alternating current), college electricity practicals and ITI electrician training, and its low-voltage outputs can run 6 V and 12 V lamps for step-down demonstrations.
The primary is connected to 240 V mains, so the teacher should make and check the mains connection. Assemble and clamp the core fully before switching on — without a closed core the mains coil draws a much larger current — switch off at the mains before changing coils, and keep the load within the 2 A maximum.
What to Specify When Ordering
- Quantity — the minimum order is 10 units.
- Mains supply — the primary is wound for 240 V, 50 Hz; tell us your plug type, and your mains voltage and frequency if they differ.
- Loads and meters — low-voltage lamps and an AC voltmeter or multimeter for measuring the outputs are separate catalogue items.
Frequently Asked Questions
What outputs does the demountable transformer give?
About 6 V from the 65-turn secondary coil and about 12 V from the 130-turn coil, each at up to 2 A, when the 2400-turn primary is connected to 240 V, 50 Hz mains.
Why are the outputs slightly below 6.5 V and 13 V?
Those are the ideal values from the turns ratio (0.1 V per turn). A real transformer loses some energy in the resistance of its windings and in the core, and not all the magnetic flux links both coils, so the measured voltage is a little lower.
Can the secondary coils be changed?
Yes. The two secondary coils are interchangeable, so students can compare outputs from 65 and 130 turns on the same primary.
What mains supply does it need?
The primary coil is listed for 240 V, 50 Hz. Tell JLab your local mains voltage, frequency and plug type when you ask for a quotation.
What can be connected to the outputs?
Low-voltage AC loads drawing no more than 2 A, such as 6 V or 12 V lamps, and an AC voltmeter or multimeter to measure the output.
Who manufactures this demountable transformer?
Jain Laboratory Instruments Pvt Ltd, trading as JLab, makes it at its works in Ambala, Haryana, India, and quotes for it directly as the manufacturer.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a manufacturer of electrical teaching apparatus and laboratory equipment in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The coils are wound and the transformer assembled at JLab’s own works rather than bought in from a trader, so schools, colleges, dealers and importers buy factory-direct, each unit is visually inspected before dispatch, and repeat orders are handled by the manufacturer. JLab exports worldwide and ships to buyers in every region — for example Cyprus in Southern Europe, Panama in Central America and the Caribbean, Myanmar in Southeast Asia, Ukraine in Eastern Europe and Kyrgyzstan in Central Asia. Tender information is on the JLab lab tenders page.
Transformer Teaching Apparatus
- Demonstration Transformer — one main coil with plug and three secondaries with 4 mm sockets.
- Transformer Accessory Set — shows that a step-down transformer can give currents large enough to weld metal or boil water.
- Lamps — 6 V and 12 V low-voltage lamps to use as loads.
- Digital Multi Meter — for measuring the output voltage.
See the full School Lab Equipment range.
Request a Quote
Quotes come direct from the manufacturer. Use the Add To Cart enquiry button on this page, or send the number of transformers (minimum 10 units), your mains voltage and plug type, and your delivery location through the contact page.
Last updated: 4 October 2026
