During the production, user handover and maintenance test of power transformers, transformer ratio test is a must. This can effectively monitor the quality of transformer products before leaving the factory and during use, and prevent transformer turn short circuit, open circuit, connection error, internal fault of voltage regulator or contact fault.
1. True three-phase test: single-phase power input, internal digital synthesis of three-phase standard sine wave signal source, through the high-fidelity power amplifier, generate three-phase test power supply (distortion less than 0.1%, symmetry better than 0.05%) output, the test results have better equivalence, and there will be no group misjudgment and other phenomena.
2. Powerful functions: It can perform single-phase measurement and automatic test of three-phase windings. Both single-phase and three-phase can measure polarity. It can measure the ratio, error, tap position, tap value and other parameters of AB, BC, CA at one time, and can automatically identify the group number (0-11 is equivalent to 1-12).
3. Hexagonal diagram display function: The results are displayed in digital and hexagonal vector diagrams, which can intuitively see the connection group of the transformer.
4. Blind test function: No need to select the wiring method, no need to select the wiring group, no external short circuit is required for measuring Y/△, △/Y transformers, and the wiring method can be automatically switched according to the selected test content. It is completely possible to measure the ratio and group number of transformers without nameplates.
5. Tap test: It can quickly measure the ratio and ratio error at each tap switch position. The rated ratio only needs to be entered once, and the ratio error of each tap position can be calculated without repeated input.
6. It has two functions: turns ratio measurement and operating voltage ratio measurement. The operating ratio can more truly reflect the actual value of the voltage ratio of the transformer under actual operation.
7. It has a demagnetization function, which can eliminate the residual magnetism in the transformer core to avoid the influence of residual magnetism on the test results.
8. It has a special test function for low input voltage transformers. For transformers with very low primary voltage, special voltage is used for testing to avoid the situation where the excitation current is too large to test.
9. Good vibration resistance: The use of military connectors enhances the vibration resistance.
10. It uses a 5-inch high-definition true color LCD screen, and the display data effect and vector graphics effect are intuitive and delicate.
11. The instrument has a USB interface and can support U disk to copy the stored data files to the computer. (The data file is in text format and can be opened without special software)
12. The test source used by this instrument is a digitally synthesized standard sine digital source with a distortion of less than 0.1% and is not affected by the quality of the working power supply.
13. An external micro printer can be equipped to print out the test results. (Optional accessories, not included in the standard configuration)
14. Easy to carry: small size and light weight.
15. Equipped with a high-capacity lithium-ion rechargeable battery, the test work can be completed on site without any power supply, and more than 500 measurements can be performed continuously after a full charge.
1. Transformation ratio measurement range: 0.9~10000
2. Measurement speed: complete three-phase test within 35 seconds
3. Measurement accuracy: Measurement accuracy of high-voltage side voltage 0.05%
Measurement accuracy of low-voltage side voltage 0.1%
Transformation ratio resolution: 0.0001
Transformation ratio measurement accuracy 0.1% (0.9-200)
0.2% (200-2000)
0.3% (2000-10000)
Full-scale 0.1-level equipment can be customized according to user requirements
4. Output voltage: test ordinary transformer AC25V, test low input voltage transformer AC5V
5. Easy to carry, suitable for field operations
6. Dimensions: 260×160×60
7. Weight: 1.8Kg
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