Two Wattmeter Method Trainer Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12870
Indian Lab Suppliers supplies the Two Wattmeter Method Trainer (Product ID: 12870) as part of its electronics engineering lab equipment range. It is a trainer that shows how total three-phase power is measured with only two wattmeters.
Quick Answer
A three-phase R-L load is supplied from 415 V mains through a 10 A MCB and metered by two 500 W wattmeters, a 500 V moving-iron voltmeter and a 1 A moving-iron ammeter. Total active power is the sum of the two readings, reactive power is √3 times their difference, and the power factor follows from their ratio; below a power factor of 0.5 one wattmeter reads negative and its connections must be reversed. Students also relate line and phase voltages and currents in star and delta. The load runs at 415 V, so change connections only with the supply off and under supervision.
Key Specifications
| Parameter | Detail |
|---|---|
| Supply | Three-phase, 415 V ±10%, 50 Hz |
| Load | R-L |
| Wattmeters | 2 × 500 W |
| Voltmeter | Moving iron, 500 V |
| Ammeter | Moving iron, 1 A |
| Protection | 10 A MCB |
| Dimensions | 350 (W) × 600 (D) × 450 (H) mm |
Where This Is Used
Used in electrical measurements and three-phase circuit labs; the Electrical Voltage / Current / Energy / Watt Measurement & Calibration Trainer (Product ID: 12861) adds one- and three-wattmeter methods, and the Power Factor Demonstrator (Product ID: 12837) covers single-phase power factor. Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
How is total power found?
By adding the two wattmeter readings.
Why might one wattmeter read negative?
When the power factor falls below 0.5.
What load is fitted?
A three-phase R-L load.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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