【Product Introduction】
The transformer DC winding resistance test is a key test method for evaluating the conductive performance of windings. It applies a constant DC current and measures the voltage drop, and calculates the winding resistance value in combination with Ohm's law to determine whether the winding material uniformity, turn-to-turn contact quality, and conductor cross-sectional area meet the design requirements. This test uses a high-precision DC power supply and a digital bridge, which can effectively detect defects such as broken winding strands, poor soldering, or turn-to-turn short circuits.
【Product Features】
High-precision Measurement
The transformer DC winding resistance test uses advanced digital sampling technology and has a built-in precision resistance measurement module with a resolution of 0.1μΩ. It can accurately analyze resistance values regardless of their value.
Efficient And Fast Measurement
The transformer DC winding resistance test can be completed in seconds. For example, it only takes 3 seconds to measure the winding resistance of a 1000kVA transformer.
Wide Range Of Environmental Adaptability
The transformer DC winding resistance test has an operating temperature range of -10℃ to 45℃ and is suitable for altitudes of ≤2000 meters. It can operate stably in complex environments such as severe cold, heat, high humidity, and high altitude.
Technical Parameters
|
type |
Integrated portable |
| Test current |
1mA 10mA 1A 5A 10A |
| Measuring range |
1mA：10Ω~20KΩ |
|
10mA：1Ω~2KΩ |
|
|
1A：10mΩ~20Ω |
|
|
5A：1mΩ~4Ω |
|
|
10A：1mΩ~2Ω |
|
|
Measurement accuracy |
± (0.2% full scale ± 2 words) |
|
Data storage |
255 of them |
|
Display |
liquid crystal display |
|
Maximum resolution |
0.1μΩ |
|
Power supply |
AC 220V±22V,50Hz±2 Hz |
|
Maximum power consumption |
300W |
|
Work environment |
Environmental temperature: 0 ° C to 40 ° C Relative humidity: ≤ 80% |
|
Volume |
400x200x280mm3 |
|
Weight |
9kg |
Nickname: DC Winding Resistance Tester, Resistance Meter, Three-circuit Transformer DC Resistance Tester
Precautions before operation
1. Check whether the wiring is correct according to the four-terminal method, that is, the current line I+ and I- terminals should be clamped on the outside of the test product, and the voltage line U+ and U- terminals should be clamped on the inside of the test product.
2. If there is an oxide layer, rust, paint, etc. on the lead-out terminal of the test product, it should be removed in time to ensure that the test clip is reliably connected to the lead-out terminal of the test product.
3. Transformers, mutual inductors, and other test products should be disconnected from the power grid before testing.
4. The test line plug should be reliably connected to the terminal on the instrument panel without looseness.
5. Whether the protective grounding wire of the instrument housing is reliably connected.
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