OVERVIEW
Transformer winding resistance testing is vital for transformers throughout all stages of their manufacture, installation, and maintenance. The test can accurately assess the welding quality of winding joints, detect winding short circuits between turns, tap changer contact, tap changer position, etc. It can also find out the hidden trouble of lead wires and conductors and guarantee the safe and stable operation of the transformer.
The RDZR-10AH portable digital winding resistance meter launched by our company utilizes advanced power supply technology, combining portability and powerful performance. It has a large output current, good repeatability, strong anti-interference, perfect protection function, high degree of automation, automatic discharge and alarm function, easy operation, high precision, can quickly complete the DC resistance measurement of the transformer, and help power testing work efficiently.
CHARACTERISTIC
- 1. The instrument is equipped with a 65K actual colour 7-inch touch screen with high brightness, which can be displayed under intense light and is very suitable for outdoor use.
- 2. The portable digital winding resistance meter can be powered by an internal battery or power adapter, which is convenient to use on different occasions and especially suitable for outdoor work.
- 3. Support the conversion of resistance values of copper and aluminum materials at different temperatures, which can be adjusted to different temperatures as needed for easy data comparison and analysis.
- 4. The battery status is clear, showing the remaining power, low battery alarm, and over-current protection to ensure the battery is safe and reliable.
- 5. Built-in storage can save 1000 groups of test data and real-time records of each test time, making accessing the history at any time convenient.
- 6. Equipped with a U-disk interface, users can easily export and back up test data, simplifying data management.
- 7. The portable digital winding resistance meter is equipped with a discharge sound alarm, power supply overheating protection and voltage reverse connection protection to ensure safe and worry-free operation.
- 8. The maximum test current can reach 10A, which is suitable for measuring the resistance value of the low voltage side of large-capacity distribution transformers, providing a wider measurement range.
- 9. You can directly switch the on-load switch during the measurement process, and the instrument will automatically refresh the data without resetting, which improves working efficiency.
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FAQ
Q: How is DC resistance measured?
A: Measuring DC resistance involves applying a direct current to a conductor or winding and measuring the resulting voltage drop. Utilizing Ohm’s Law (R = V/I) allows for resistance calculation. This is crucial for assessing the health and performance of conductors, windings, and various electrical devices, including transformers. Specialized equipment like a DC resistance tester is commonly used for precise measurements.
Q: What is the winding resistance instrument?
A: The DC resistance instrument measures electrical components’ direct current (DC) resistance. It applies a known DC, measures the resulting voltage drop, and calculates resistance using Ohm’s Law (R = V/I). This tool is essential for assessing the health and performance of components like transformers during various stages, including manufacturing, installation, and maintenance.
Q: What is the difference between impedance and DC resistance?
A: The key distinction between impedance and resistance lies in their interaction with current. Resistance resists both direct current (DC) and alternating current (AC), whereas impedance exclusively resists the flow of alternating current.
