XW-3040C Transformer DC Resistance Tester (40A Touchscreen Edition)
1. Overview
Transformer DC resistance is a necessary test item for semi-finished products and finished products in transformer manufacturing, such as factory testing, installation, overhaul, change of tap changer, handover test, and preventive test in the power sector. It can check the welding quality of the winding joint and whether there is a turn-to-turn short circuit in the winding. It can also check whether the contact of each position of the voltage tap-changer is good, whether the actual position of the tap-changer is consistent with the indicated position, whether the lead-out wire is broken, and whether the multi-strand conductor is wound in parallel. In order to meet the needs of rapid measurement of transformer DC resistance, a DC resistance tester is developed by our company. The instrument adopts brand-new power supply technology, which has the characteristics of small volume, light weight, large output current, good repeatability, strong anti-interference ability, and perfect protection function. The whole machine is controlled by a high-speed single-chip microcomputer, with high automation and automatic discharge and discharge alarm functions. The instrument has high test precision and simple operation, and can realize rapid measurement of transformer direct resistance.
2 . The key technical indexes
| project | Technical indicators and parameters | remarks |
| Test current | <20mA、2.5A、5A、10A、20A、40A | |
|
measuring range | 100μΩ～500mΩ （40A） 400μΩ～1Ω （20A） 1mΩ～2Ω （10A） 2mΩ～4Ω （5A） 5mΩ～8Ω (2.5A） | Accuracy: (0.2%+2 words) |
| 10Ω-20KΩ （<20mA） | Accuracy: (0.5%+2 words) | |
| Minimum resolution | 0.1μΩ | |
| show | LCD | The effective number of resistance digits displayed is 4. |
| Data storage | 1000 zu | |
| working environment | Ambient temperature: 0℃ ~ 40℃, relative humidity: < 90%RH, no condensation. | |
| Power Supply | AC 220V±10V,50Hz±1Hz | Safety tube 5A |
| Maximum power consumption | 500W | |
| outline dimension | host machine：405×230×355（mm） Wire box：360×260×180（mm） | |
| weight | host machine 15KG Wire box:5.5KG | |
| Test line length | Standard 13 meters | The length can be customized |
XW-3040C Transformer DC Resistance Tester (40A Touchscreen Edition)
