Introduction to ZGY-40A DC Resistance Tester:
I. Overview
The ZGY series transformer DC resistance is a mandatory test item in transformer manufacturing for semi-finished and finished products, factory acceptance tests, installation, major repairs, after changing tap changers, handover tests, and preventive tests by power departments. It can check the welding quality of winding joints and whether there are inter-turn short circuits in windings, detect whether the contacts at various positions of the voltage tap changer are in good condition and whether the actual position of the tap changer matches the indicated position, whether the lead wires are broken, and whether there are broken strands in multi-strand parallel windings. To meet the need for rapid measurement of transformer DC resistance, our company has developed this DC resistance tester. The instrument adopts brand-new power supply technology and features small size, light weight, large output current, good repeatability, strong anti-interference capability, and comprehensive protection functions. The whole machine is controlled by a high-speed microcontroller, with a high degree of automation, and has automatic discharge and discharge alarm functions. The instrument offers high testing accuracy and simple operation, enabling rapid measurement of transformer DC resistance.
II. Safety Measures
Read this manual carefully before using this instrument.
2 Users of the instrument should have general electrical knowledge.
3 Avoid using the instrument in places exposed to rain, corrosive gases, excessive dust, high temperatures, direct sunlight, etc.
4 The instrument should be protected from prolonged jolting and severe vibration.
5 Maintenance and debugging of the instrument should be carried out by professionals.
6 After testing, be sure to wait until the discharge alarm sound stops before turning off the power and removing the test leads.
7 When measuring no-load tap-changing transformers, always wait until the discharge indication alarm sound stops before switching gears.
8 During testing, moving the test clips and power supply lines is prohibited.
III. Performance Features
1 The whole machine is controlled by a high-speed microcontroller, with a high degree of automation and simple operation.
2 Adopts high-frequency switching power supply technology, with large output current, suitable for DC resistance measurement of large and medium-sized transformers.
3 Comprehensive protection functions reliably protect the instrument from back electromotive force impacts, ensuring more reliable performance.
4 Equipped with audible discharge alarm, clear discharge indication, reducing misoperation.
5 Fast response speed, allowing direct switching of on-load tap changers during measurement, with automatic data refresh.
6 Adopts a vertical case structure, convenient for field use.
7 Intelligent power management technology ensures the instrument always operates in a low-power state, effectively reducing internal heat generation and saving energy. It can work continuously for several hours.
8 Dot-matrix LCD, Chinese menu, print output.
