According to IEC and relevant national standards, in the process of power transformer production, user handover and maintenance test, transformer ratio test is a must-do item. This can effectively supervise the quality of the transformer products during delivery and use, and prevent short circuits, open circuits, connection errors, internal failures or contact failures of the voltage regulating switch. The multifunctional automatic ratio tester independently developed and produced by our company has the characteristics of being completely based on the user’s on-site use requirements, simple operation, complete functions, and stable and reliable data. It is also one of the few domestic ones that can perform blind testing (not Know the connection mode and group of the transformer under test, accurately measure the transformation ratio tester to test the parallel operation state of the main transformer; test the parallel operation of the transformer from the root cause, which can adapt to the transformation ratio of various large, medium and small transformers The need of the test is a transformation ratio tester with advanced technology, complete test items and comprehensive measurement parameters in domestic transformation ratio testing so far.
The instrument uses a large-screen true color LCD as the display, a full Chinese graphical operation interface and a Chinese character prompt message, a multi-parameter LCD display interface, a friendly man-machine dialogue interface, vector diagram display and wiring judgments to check the correctness of the circuit Sex provides a reliable basis. Full-touch conductive silica gel keyboard operation mode, the operation feels good, easy to learn. The instrument has a built-in large-capacity data storage that does not lose data after power-off. It can save on-site calibration data. It can expand and store up to 1000 sets of on-site calibration results. It can provide background computer management software to upload the results to the computer to realize computerized management.
The instrument adopts the engineering plastic shell independently designed and manufactured by our company, and the appearance of the instrument is beautiful and practical. The on-site test operation is convenient.
Technical index
1. Measuring range of transformation ratio: 0.9~8000.
2. Fast measurement speed: complete three-phase test within 1 minute.
3. Measurement accuracy: The measurement accuracy of the high voltage side voltage is 0.05%
The measurement accuracy of the low voltage side voltage is 0.1%
Measurement accuracy of transformation ratio 0.1% (0.9-1000)
0.2% (1000-3000)
0.3% (3000-8000)
4. Convenient to carry and suitable for field operations.
5. Weight: 3Kg
Features
1. True three-phase test: single-phase power input, internal digital synthesis of three-phase standard sine wave signal source, through high-fidelity power amplifier to produce three-phase test power (distortion less than 0.1%) output, the test results have better etc. Effectiveness, there will be no group misjudgment and other phenomena.
2. Powerful function: It can perform single-phase measurement and automatic test of three-phase windings. Both single-phase and three-phase can measure polarity and phase angle. It can measure the transformation ratio of AB, BC and CA at one time. Parameters such as error, tap position, tap value, etc., can automatically identify the group number.
3. Blind test function: there is no need to select the wiring method, no need to select the wiring group, and the Y/△, △/Y transformer does not need to be short-circuited externally, and the wiring method can be automatically switched according to the selected test content.
4. Tap test: It can quickly measure the transformation ratio and transformation ratio error at each tap switch position. The rated transformation ratio only needs to be input once, and the transformation ratio error of each tap position can be calculated without repeated input.
5. Good vibration resistance: the use of military connectors enhances the vibration resistance.
6. Revolutionaryly express the magnitude and phase relationship between voltages and currents with vector diagrams intuitively, so that users can more easily understand the actual meaning of each parameter from a subjective point of view.
7. A 7-inch high-definition color screen is used to display data effects and vector graphics effects intuitively and delicately.
8. The test source used by this instrument is a digitally synthesized standard sinusoidal digital source with a distortion degree of less than 0.1%, which is not affected by the quality of the working power supply.
9. Convenient to carry: small size and light weight.
10. An internal rechargeable battery is optional, and the test can be completed without any power source on site.
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