Product Introduction:
DC resistance of transformer is a must-test item of semi-finished product, finished product factory test, installation, handover test and preventive test of power department in transformer manufacturing, which can effectively find manufacturing defects such as material selection, welding, loose connection parts, missing strands, broken wires and other hidden dangers after operation.
The transformer DC resistance tester is an innovative product with a built-in large-capacity lithium battery, which is small in size and easy to carry. The product is not only suitable for the measurement of inductive test products such as transformers, transformers, reactors, but also suitable for the measurement of resistive test products such as copper bars, wires, switch contacts, etc. The instrument test speed is fast and the accuracy is high.
Technical Parameters:
| Direct resistance test | |||
| Current gear | Rango de medición | Current gear | Rango de medición |
| 10 A | 500uΩ~200mΩ | 100mA | 10Ω~200Ω |
| 5A | 10mΩ~1Ω | 10mA | 50Ω~2kΩ |
| 1A | 100mΩ~20Ω | 1mA | 500Ω~50kΩ |
| Technical index | |||
| exactitud | ±(Reading x 0.2%+2 words) | Maximum resolution | 0.1uΩ |
| Conditions of use and appearance | |||
| Fuente de alimentación de trabajo | Built-in lithium battery or external charger, charger input 100 ~ 240VAC, 50Hz/60Hz | ||
| Tensión de carga | 16.8V | Corriente de carga | ≤2A |
| Tiempo de carga | About 4 hours | Service time | More than 8 hours |
| Main engine weight | 3.6kg(excluding test line) | Main engine size | 325×225×125mm3 |
| Temperatura de servicio | -10℃~50℃ | Humedad relativa | ≤90%, no condensation |
Product Features:
1. Dual Power Supply
Lithium battery or 220V AC adaptive input. Single charge supports 500+ transformer DC resistance tests.
2. Intelligent 10A Output
selectable currents (≤10A/25V) with auto-ranging for rapid testing.
3. Wide Range & High Accuracy
500μΩ – 50kΩ ±0.2% full-scale.
4. Resistance-Temperature Conversion
Built-in RT calculation for direct temperature analysis.
5. Comprehensive Safety Protections
Back-EMF / Open-circuit / Power-loss / Over-temperature protection with alarms.
6. Sunlight-Readable Display
5.6" industrial-grade color LCD (1000-nit brightness).
7. Printer-Ready
Supports external printers for instant reports.
8. Flexible Data Storage
Local memory + USB export capabilities.
Precautions:
Test the no-load voltage regulating winding, and it is not allowed to switch the no-load tap changer during the testing process or before discharging the power.
During the testing or discharging process, it is not allowed to remove the testing line and cut off the power switch.
During the testing of the transformer, the winding on the unmeasured side of the transformer must be open circuited.
