Study of Instrument Transformers (C.T. & P.T.) Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12930
Indian Lab Suppliers supplies the Study of Instrument Transformers (C.T. & P.T.) (Product ID: 12930) as part of its electronics engineering lab equipment range. It shows how a current transformer and a potential transformer are connected to measure current, voltage and power in a single-phase circuit.
Quick Answer
The CT and PT (both 10:1 in their measured quantity) are wired into a circuit whose load is three 100 W lamps with individual switches, giving up to 300 W. Two 3½-digit digital AC voltmeters (1000 V and 200 V) read the PT primary and secondary, two digital AC ammeters read the CT primary and secondary (200 mA on the secondary side), and a single-phase, single-element digital low-power-factor wattmeter (230 V nominal, 0-0.5 A) measures power through the instrument transformers. A variac is also part of the set-up. The primary-side ammeter range is not stated; please confirm it at quotation. The board runs from 230 V ±10%, 50 Hz mains with a 2 A fuse. Never open the CT secondary while load current flows.
Key Specifications
| Parameter | Detail |
|---|---|
| Current transformer | 10:1 current ratio (1:10 turns) |
| Potential transformer | 10:1 |
| Voltmeters | 2 × digital AC, 3½ digit: 1000 V and 200 V |
| Ammeters | 2 × digital AC, 3½ digit: primary range to be confirmed, 200 mA |
| Wattmeter | Digital low power factor, single phase, single element; 230 V, 0-0.5 A |
| Load | 300 W: 3 × 100 W lamps with switches |
| Also in set-up | Variac |
| Mains | 230 V ±10%, 50 Hz; ON/OFF switch and 2 A fuse |
Where This Is Used
Combines the single-transformer exercises of the Study of Current Transformer (C.T.) (Product ID: 12928) and the Study of Potential Transformer (P.T.) (Product ID: 12929) into a power measurement. Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
How is true power found with a CT and PT?
Multiply the wattmeter reading by both the CT and PT ratios.
What load is supplied?
Three 100 W lamps with individual switches.
Why must the CT secondary stay closed?
An open secondary on load can develop a dangerous voltage.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Electronics Lab Equipment
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