The DC resistance of transformers is a critical parameter in various stages of transformer manufacturing, including semi-finished product and finished product factory tests, installation, major repairs, tap changer modifications, handover tests, and preventive tests conducted by power departments. It helps assess the soldering quality of winding connections, detect inter-turn short circuits in windings, verify the proper contact of voltage tap changers at all positions, ensure the alignment between the actual and indicated tap positions, and identify issues such as broken lead wires or broken strands in multi-strand conductors.  To meet the demand for rapid DC resistance measurement of transformers, our company has developed the YNZZ-10A DC resistance tester. This instrument features advanced power supply technology, offering a compact design, lightweight construction, high output current, excellent repeatability, strong anti-interference capabilities, and comprehensive protection functions. The entire system is controlled by a high-speed microprocessor, ensuring high automation with automatic discharge and discharge alarm functions. The instrument delivers high testing accuracy and user-friendly operation, enabling rapid DC resistance measurement of transformers.

1. This product is suitable for testing inductive loads such as 10KV and 35KV distribution transformers, current transformers, motors, generators, etc., as well as for measuring wire materials, relay switch contacts, and similar components.
2. It features a temperature conversion function, allowing resistance values to be converted to different temperatures based on customer requirements for convenient data comparison.
3. Features non-volatile data storage and a perpetual calendar, capable of storing 1,000 sets of test data and recording test times in real time.
4. Equipped with a mini printer for real-time printing of test data.
5. Equipped with protection functions such as discharge sound alarm, power overheating, and reverse voltage connection.
6. A 65K true-color LCD with a 480x272 dot matrix, high brightness, and clear display even under strong light.
7. The on-load tap changer can be directly switched during the measurement state, with the instrument automatically refreshing the data without requiring a reset operation.
8. Equipped with RS232 and USB interfaces for convenient communication and mobile data storage.
9. It features six current ranges with an automatic current selection function, allowing it to automatically adjust the current range based on the load.
10. Injection moldable machine housing, featuring waterproof, dustproof, and shockproof capabilities