What is the transformer short circuit impedance tester?
The transformer short-circuit impedance tester can be used to measure the low-voltage short-circuit impedance and test the low-voltage short-circuit impedance. The measurement of low-voltage short-circuit impedance is the basic item in the routine test items. Comparing the short-circuit impedance measured before and after the transformer is impacted by the short-circuit current, according to its change size, the winding deformation degree can be preliminarily estimated. The change of short-circuit impedance between the transformer and the original low-voltage short-circuit test after the short-circuit current impact shall not be more than 2%.
Low voltage short-circuit impedance test is the most direct method to identify whether the transformer is impacted by the short-circuit current in operation, or whether the winding is deformed after the transformer is impacted by the mechanical force during transportation and installation. It is of great significance to judge whether the transformer can be put into operation, and it is also one of the bases to judge whether the transformer requires disassembly inspection. It is the basic item in the routine test item, comparing the short-circuit impedance measured before and after the transformer is impacted by the short-circuit current.
Zc-204a transformer short-circuit impedance tester is an instrument specially developed by Wuhan Zhizhuo measurement and Control Co., Ltd. for low-voltage short-circuit impedance test of 35kV and above main transformers under the conditions of field and laboratory.
Zc-204a transformer short-circuit impedance tester is in accordance with Article 15.2 of document [2000] No. 589 "25 key requirements for preventing major accidents in power production" issued by State Power Corporation: 110kV and above voltage level transformers shall be tested for low-voltage short-circuit impedance before leaving factory and putting into production or tested for winding deformation by frequency response method to keep original records. According to 15.6, the transformer shall be tested for low-voltage short-circuit impedance or for winding deformation by frequency response method after suffering sudden short-circuit in the near area, and shall not be put into operation until it is judged that the transformer has no fault by comparing with the original record.
What are the characteristics of zc-204a transformer short-circuit impedance tester?
1. The instrument is small in volume and light in weight.
2. Voltage and current synchronous AC sampling and signal digital processing technology are adopted inside the instrument to ensure accurate measurement data.
3. The instrument adopts single-phase measurement mode. After selecting transformer connection, three times of measurement can automatically calculate the short-circuit impedance of each phase.
4. The instrument has the function of automatically converting low current test to rated current, which is suitable for field use.
5. The instrument can measure voltage, current and power synchronously. And measure the frequency of the applied power supply.
6. The built-in non power down memory can store the measurement data for a long time, and the instrument has its own printer.
7. Large screen LCD display, all Chinese menus and operation tips, simple and intuitive operation. The liquid crystal can be displayed clearly in direct sunlight.
The above is a simple function introduction of zc-204a transformer short-circuit impedance tester. It can be seen from this article that the zc-204a transformer short-circuit impedance tester developed by our company is fully in line with the national regulations, featuring simple operation, long data storage time and self-contained printer. Convenient for technical staff
