Demountable Transformer
Product Code : SCL-M-11210
Quick answer: The demountable transformer is a teaching transformer whose coils and magnetic core can be seen and rearranged. It has a 2400-turn coil marked 220 V AC, a 130-turn coil marked 12 V AC and a 65-turn coil marked 6 V AC, for showing mutual induction and how the turns ratio sets the output voltage. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Part | Specification |
|---|---|
| Type | Demountable transformer for teaching |
| High-turn coil | 2400 turns, marked 220 V AC |
| Intermediate coil | 130 turns, marked 12 V AC |
| Low-turn coil | 65 turns, marked 6 V AC |
| Principle | Electromagnetic (mutual) induction and transformer action |
Core dimensions and supply leads are confirmed with the quotation.
How the transformer experiment is done
An alternating current in the primary coil sets up an alternating magnetic flux in the core, which links the secondary coil and induces an alternating e.m.f. in it. For an ideal transformer the voltages are in the ratio of the turns, Vs / Vp = Ns / Np. The coil markings follow this rule: with 2400 turns on 220 V there are about 11 turns per volt, so 130 turns gives about 12 V and 65 turns about 6 V.
- Place the apparatus on a dry bench and check the coils, core and leads for damage before connecting anything.
- Assemble the core with the chosen primary and secondary coils and close it fully so there is no air gap.
- Connect the primary to an AC supply matching its marking, under teacher supervision, and measure the secondary voltage with an AC voltmeter.
- Switch off, change the secondary coil, and compare each measured voltage with the turns ratio.
- With the supply off, open the core slightly, reconnect and note how the output falls as the flux linkage drops.
Safety: the 2400-turn coil is marked for 220 V AC mains, so connections to it should be made only by the teacher or under direct supervision, with the supply switched off whenever coils or core parts are changed.
Key features
- Visible coils and core link the textbook diagram to real hardware.
- Three coils marked with both turns and voltage for easy ratio calculations.
- Shows step-down transformation from a 220 V primary to 12 V and 6 V outputs.
- Coils can be exchanged to compare different primary and secondary combinations.
- Suits teacher demonstrations and supervised practicals in physics and electrical science.
Documentation and supply
Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the demountable transformer at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Magnetism products
- Electric Motor Model (SCL-M-11214)
- Fleming's Right Hand Rule (SCL-M-11199)
- Fleming's Left Hand Rule (SCL-M-11198)
- Electromagnet "U" Shape (SCL-M-11228)
- Electromagnet (SCL-M-11183)
- Horseshoe Magnet (SCL-M-11245)
The full range is in the Magnetism section of the Physics Lab range.
Frequently asked questions
What coils are supplied with the demountable transformer?
Three coils: 2400 turns marked 220 V AC, 130 turns marked 12 V AC and 65 turns marked 6 V AC.
What is the turns ratio rule for a transformer?
For an ideal transformer Vs / Vp = Ns / Np, so the output voltage rises or falls in proportion to the number of turns on the secondary coil.
What is the price of the demountable transformer?
Prices are not published on the website. Add the demountable transformer to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-M-11210 and the quantity, to receive a quotation.
Does Lab Exports manufacture the demountable transformer?
Yes. Lab Exports manufactures the demountable transformer at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-M-11210.
Request a quote
Email [email protected] with the house code SCL-M-11210 and the quantity, or add the demountable transformer to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
