Transformer Comprehensive Test System

1.3.4.During the no-load and load characteristics tests of a 33kV transformer, the current is measured by a current transformer. The current transformer's gears include: 100A, 50A, 25A, 10A, 5A, 2.5A, 1A/1A, totaling seven gears, with an accuracy level of 0.05S.

Test items:

1.No load characteristic test of transformer

2.Transformer load characteristic test

3.Transformer ratio group error test

4.Withstand voltage test of transformer

5.Frequency doubling withstand voltage test of transformer

6.Power transformer insulation test

7.DC resistance test of power transformer

1.Safe and reliable

① The high-voltage test has a grounding verification function, and the test transformer cannot be closed without grounding with the tested object;

② During the ratio test, it has the function of checking the high and low voltage wiring, and automatically alarms and prompts when the high and low voltage sides are connected in reverse;

③ The closing of the voltage regulator has a zero position check function, and it cannot be closed when the voltage regulator is not in the zero position;

④ Equipped with a software, electrical, and mechanical three-level safety interlock design mechanism to prevent misoperation;

⑤ Equipped with software and hardware two-stage overvoltage and overcurrent protection mechanisms;

2.Efficient system working     

① After setting the nameplate parameters of the test object on the computer, automatically generate the test parameters for each test item, and connect the test equipment to automatically complete the test;

② The transformation ratio test and direct resistance test can be connected once, and the equipment automatically completes the transformation ratio test and direct resistance test of all windings;

③ All experimental projects can be completed through a computer, which automatically collects test results and generates reports;

3.High measurement accuracy   

① The CT and PT used in the system have an accuracy of 0.05 level and can be independently calibrated;

② The transformer ratio test, direct resistance test, power analyzer, etc. are all equipped with equipment not less than 0.2 level;

③ The instrument samples at high speed in real time and calculates the results. Computer software is used to collect test results, so the test process and results are not affected by computer configuration and communication bandwidth;

4.Simple operation and convenient maintenance

① The operation software has functions such as testing process guidance, wiring diagrams, online help, etc., which can enable testers to quickly get started;

② The system has three operating modes: manual, semi-automatic, and fully automatic, and the fully automatic mode provides a simple and efficient working mode; Manual and semi-automatic systems facilitate system debugging and maintenance;

③ The system adopts a distributed modular design for easy maintenance and replacement;