Product Introduction
This DC resistance rapid tester is the latest generation product for measuring the DC resistance of transformers, optimized for measuring the DC resistance of three-phase windings in large capacity transformers. Simultaneously test the DC resistance of the three-phase winding of the transformer.
Parâmetros técnicos
| Testing current | Single phase：1A 5A 10A 20A | ||
| Three phase：1A 5A 10A | |||
| Measurement scope | Single phase | ||
| 1A 10mΩ ～ 20Ω | |||
| 5A 1mΩ ～ 4Ω | |||
| 10A 1mΩ ～ 2Ω | |||
| 20A 1mΩ ～ 1Ω | |||
| Three phase | |||
| 1A 10mΩ ～ 6Ω （each phase） | |||
| 5A 1mΩ ～ 1Ω （each phase） | |||
| 10A 1mΩ ～ 0.6Ω （each phase） | |||
| Precisão de medição | ± (0.2%Full span ± 2 words ) | ||
| Maximum resolution | 0,1mΩ | ||
| Data storage capacity | 150 groups | ||
| Fonte de energia | AC 220V±22V，50Hz±2Hz | ||
| Ambiente de trabalho | Ambient temperature: 0°～40° Relative humidity :≤80% | ||
Product Features:
1. Simultaneously test the DC resistance of the three-phase winding of the transformer.
2. For on load tap changers, there is no need for discharge, and the tap changer can be directly adjusted. The measurement time is one-third of traditional single-phase measurement, which can greatly shorten the working time and labor intensity.
3. The direct resistance meter adopts a large screen LCD display with a fully Chinese graphical interface, which is clear and intuitive, and the operation is very simple.
4. And equipped with a panel printer and large capacity non-volatile memory, it can conveniently store and print measurement results.
5. The test data is stable, fast, and has good repeatability, making it the best choice for on-site measurement of transformer DC resistance.
Matters needing attention:
1. When measuring an unloaded voltage regulating transformer, the discharge must be exited before switching the tap changer. The tap changer can only be switched after the discharge indication is complete
2. It is not allowed to dismantle the wiring during the measurement process.
3. If the charging progress bar and current display value remain stagnant for a long time, the measured winding resistance may exceed the current measurement range, and the current may not reach the preset value. At this point, you can press the 'Exit' button to return, select the current again, and try again.
4. When replacing the fuse and accessories, please use the same model as this instrument
