Hopkinson's Test of DC Machine Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12962
Indian Lab Suppliers supplies the Hopkinson's Test of DC Machine (Product ID: 12962) as part of its electronics engineering lab equipment range. It is a pair of identical DC shunt machines, coupled and connected in parallel, for Hopkinson’s back-to-back efficiency test.
Quick Answer
Two 1 HP, 200 V, 1500 rpm DC shunt machines (2 HP and 3 HP versions are also offered) are flexibly coupled on a mild steel channel base. One runs as a motor and drives the other as a generator; the generator field is adjusted until its voltage matches the supply, and it is then paralleled so its output feeds the motor. The DC supply therefore only has to make up the losses, which lets two machines be tested at full load while drawing little power. From the currents and voltages of both machines the losses and the efficiency of each are calculated.
Key Specifications
| Parameter | Detail |
|---|---|
| DC power supply | Input 230 V AC ±10%, 50 Hz; fixed 200 V; variable 0–200 V |
| Machines | 2 DC shunt, 1 HP (2 HP and 3 HP options), 200 V, 1500 rpm (no load), class B |
| Meters (MC) | Voltmeter 300 V; 2 ammeters 1 A; 2 ammeters 5 A |
| Loading | Electrical loading arrangement |
| Dimensions | Control panel W 600 × D 450 × H 600 mm; MG set W 180 × D 900 × H 310 mm |
| Weight | Control panel about 17 kg; MG set about 53 kg |
| Included | Digital tachometer, learning material CD; 2-year warranty |
Where This Is Used
Used in DC machines laboratories for regenerative efficiency testing. Paralleling the generator at the wrong voltage or polarity causes a heavy current, so check both before closing the switch and work under supervision. Compare Swinburne's Test of DC Machine (Product ID: 12961) and Field Test of DC Series Machine (Product ID: 12955). Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
Why are two identical machines needed?
One works as a motor and one as a generator, and their losses are assumed equal.
What does the supply provide?
Only the losses of the two machines.
Which ratings are offered?
1 HP as listed, with 2 HP and 3 HP options.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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