Product Introduction
Transformer DC winding resistance tester is a precision instrument specially used to measure the DC resistance of transformer windings. Its working principle is: inject a stable DC current into the transformer winding, measure the voltage drop across the winding, and then accurately calculate the DC resistance value according to Ohm's law.
Product Features
High Measurement Accuracy
The transformer DC winding resistance tester uses advanced digital measurement technology, and the resistance measurement accuracy is ±0.2%.
Fast Response Capability
The transformer DC winding resistance tester is equipped with a high-performance microprocessor, and the data processing is fast. From startup to stable results, it usually takes no more than 3 seconds.
Efficient Data Management
The transformer DC winding resistance tester has the function of storing 255 data, which is convenient for users to collect winding resistance data under different working conditions.
Clear And Intuitive Display
The transformer DC winding resistance tester uses an LCD display with a 4 1/2-digit resistance display and a maximum resolution of 0.1μΩ, which can clearly present resistance data.
Technical Parameters
|
Test current |
2.5A 5A 10A 20A 40A |
|
Range
|
2.5A：10mΩ~8Ω |
|
5A：1mΩ~4Ω |
|
|
10A：1mΩ~2Ω |
|
|
20A：1mΩ~1Ω |
|
|
40A：1mΩ~500mΩ |
|
|
Measurement accuracy |
± (0.2% full scale ± 2 words) |
|
data storage |
255 of them |
|
display |
LCD display, resistor display with 4 1/2 digits |
|
Maximum resolution |
0.1μΩ |
|
Power Supply |
AC 220V ± 22V, 50Hz ± 2 Hz, fuse 10A |
|
Maximum power consumption |
1200W, when the test current is 40A |
|
work environment |
Environmental temperature: 0 ° C to 40 ° C Relative humidity: ≤ 80% |
|
volume |
440╳230╳490(mm) |
|
weight |
20kg, without accessories |
Nickname:DC Winding Resistance Tester,Resistance Meter,Three-circuit Transformer DC Resistance Tester
Product Application
Power Industry
In the power industry, transformer DC winding resistance tester is mainly used for transformer factory testing and preventive testing. Its function is to accurately measure the DC resistance of the winding, determine whether the winding has defects such as short circuit and open circuit, and ensure the stable operation of the power system.
Electrical Equipment Manufacturing Industry
In the electrical equipment manufacturing industry, transformer DC winding resistance tester is used for quality inspection during the transformer production process. It can promptly detect problems such as poor winding connection to ensure that product quality meets the standards.
Power Maintenance Industry
In the power maintenance industry, transformer DC winding resistance tester is used for transformer fault detection and post-repair detection. By measuring the resistance value, it can accurately determine the fault location and repair effect, providing guarantee for the safe operation of the transformer.
matters needing attention
① After measuring the inductive load, the test line cannot be removed directly to avoid endangering the test personnel and equipment safety due to inductive discharge. The output end of this machine is equipped with a discharge circuit. When the output is turned off, the inductance will release energy through the instrument leakage. The test line can be removed only after the discharge indicator is displayed.
② For no-load tap changers, switching the tap changer is not allowed during the measurement process.
③ If the power supply suddenly fails during the measurement, the machine will automatically start to discharge. Please do not disconnect the connection immediately.
Wait at least 30 seconds before disconnecting the connection.
④ During measurement, do not short-circuit other unmeasured windings to the ground, otherwise it will slow down the magnetization process of the transformer and prolong the data stabilization time.
⑤ Please check the power supply voltage before turning on the machine: AC 220V±10% 50Hz.
⑥ During the experiment, please confirm that the device under test is powered off and disconnected from other energized devices.
⑦ During the experiment, the housing must be reliably grounded.
⑧ During the experiment, no irrelevant items should be stacked on or around the device panel.
⑨When replacing fuses and accessories, please use the same model as this instrument.
⑩This instrument should be moisture-proof and oil-proof.
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