Field Test of DC Series Machine Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12955
Indian Lab Suppliers supplies the Field Test of DC Series Machine (Product ID: 12955) as part of its electronics engineering lab equipment range. It is a pair of identical DC series machines, coupled together, for finding their losses and efficiency by the field test.
Quick Answer
Two 1 HP DC series machines (1500 rpm at load; 5 HP versions are also offered) are flexibly coupled on a C-channel base, one running as a motor and the other as a generator. Their field windings are connected in series so both machines carry the same excitation; the generator output is dissipated in the electrical load, and from the readings of three DC voltmeters and two DC ammeters the losses and the efficiency of motor and generator are worked out. The field test is used for series machines because they cannot be run unloaded for a no-load test.
Key Specifications
| Parameter | Detail |
|---|---|
| DC power supply | Input 230 V AC ±10%, 50 Hz; fixed 180–200 V; variable 0–180/200 V (to suit the motor rating) |
| Machines | 2 DC series machines, 1 HP (5 HP option), 1500 rpm at load, class B |
| Meters (MC) | 3 DC voltmeters; 2 DC ammeters |
| Loading | Electrical loading arrangement |
| Connections | Armature and field terminals on the machine terminal box; rheostat and starter terminals on the panel |
| Panel dimensions | W 600 × D 350 × H 600 mm |
| Included | Learning material CD; 2-year warranty |
Where This Is Used
Used in DC machines laboratories for efficiency tests on traction-type series machines. A series motor must never run uncoupled or unloaded because its speed rises dangerously, so keep the coupling in place, guard the shafts and supervise every run. Other DC machine tests: Swinburne's Test of DC Machine (Product ID: 12961) and Hopkinson's Test of DC Machine (Product ID: 12962). Browse the full Electronics Engineering Lab Equipment range or related Electricity and Magnetism products.
Frequently Asked Questions
Why are the two fields connected in series?
So both machines have the same excitation and their iron and friction losses are equal.
Can Swinburne’s test be used instead?
No, that is a no-load test and a series motor cannot be run unloaded.
Which machine ratings are offered?
1 HP as listed, with a 5 HP option.
Related Categories
Electronics Engineering Lab Equipment · Electricity and Magnetism · Engineering Lab Equipment
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