XHZ1010
This is a mandatory test item in transformer manufacturing, including semi-finished and finished product factory tests, installation, overhaul, tap changer modifications, commissioning tests, and preventative tests by the power sector. It can check the welding quality of winding joints and the presence of inter-turn short circuits in the windings. It can also detect the good contact of each position of the voltage tap changer, whether the actual position of the tap changer matches the indicated position, whether there are broken leads, and whether there are broken strands in multi-stranded wires. To meet the need for rapid measurement of transformer DC resistance, our company has developed the XX10A DC resistance tester. This instrument adopts new power supply technology and features small size, light weight, large output current, good repeatability, strong anti-interference ability, and comprehensive protection functions. The entire machine is controlled by a high-speed single-chip microcomputer, with a high degree of automation and automatic discharge and discharge alarm functions. The instrument has high testing accuracy, is easy to operate, and can realize rapid measurement of transformer DC resistance.
Technical Parameters
|
Test Current
|
AUTO, <20mA, 40mA,200mA, 1A, 5A, 10A
|
| Measurement Range and Accuracy |
0.5mΩ～0.8Ω (10A)
2mΩ-4Ω (5A)
10mΩ-20Ω (1A)
100mΩ-100Ω (200mA)
1Ω-500Ω (40mA) ±(0.2%+2 digits)
100Ω-100KΩ (<20mA) ±(0.5%+2 digits)
|
| Minimum Resolution |
0.1μΩ |
| Data Storage |
1000 sets |
| Power Supply |
AC 220V±10V, 50Hz±1Hz, 2A fuse |
| Test cable length |
Standard 10 meters, length can be customized |
Performance Features
1. The instrument can be controlled via Android phones or tablets. Follow the WeChat official account, download the dedicated APP, and control the instrument throughout the process. Test data is stored and uploaded for easy retrieval.
2. The instrument has a maximum output voltage of 24V, facilitating the selection of larger test currents for high resistance values and improving testing speed.
3. The instrument adopts new power supply technology, offering multiple current ranges and a wide measurement range. It can automatically select the current according to the load, making it suitable for DC resistance measurement of small and medium-sized transformers and voltage transformers.
4. It features multiple protection functions, including back EMF impact, wire breakage and power failure during testing, and power overheating protection. It reliably protects against back EMF impacts and provides a simultaneous audible alarm.
5. It has an arbitrary temperature conversion function for copper and aluminum materials, allowing touch input of any winding temperature and conversion temperature.
6. Intelligent power management technology ensures the instrument always operates at minimum power, effectively saving energy and reducing heat generation.
7. A 7-inch high-brightness touchscreen color LCD provides clear display even in strong light, full touchscreen operation, and free switching between Chinese and English.
8. The instrument features a built-in perpetual calendar clock and power-off memory, capable of storing 1000 sets of test data for easy access.
9. The instrument has Bluetooth, RS232, and USB interfaces for computer communication and USB flash drive data storage.
10. It includes a built-in panel-mounted mini printer, allowing for Chinese-language printing of measurement results.
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