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 hand-held automatic ratio tester independently developed and produced by our company has the characteristics of being completely in accordance with 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 be blindly tested so far. (Accurately measure the transformation ratio and group number without knowing any nameplate parameters of the transformer under test, and can accurately measure the phase angle at the same time) Hand-held transformation ratio tester; it can adapt to the needs of various large, medium and small transformer transformation ratio tests ( Including Z-type transformers, rectifier transformers, electric furnace transformers, non-integral-point phase-shifting transformers, traction transformers, Scott and reverse Scott transformers). So far, the technology is advanced in the domestic transformer ratio test, the test items are complete, and the measurement A comprehensive parameter ratio tester.
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 a power failure. It can save on-site calibration data. It can expand to store up to 1000 sets of on-site calibration results. It can provide background computer management software to transfer the results to a computer through a U disk and produce reports. , Printing, 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: 0.8~10000.
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%
Phase angle measurement accuracy: 0.1°
Measurement accuracy of transformation ratio: 0.1% (0.8-3000)
0.2% (3000－10000)
According to user requirements, a full-scale 0.1-level equipment can be customized
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 degree less than 0.1%, symmetry degree better than 0.05%) output, The test results have better equivalence, and 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. The phase angle value, error, tap position, tap value and other parameters can automatically identify the group number.
3. Phase angle measurement function: accurately measure the phase angle between the high and low voltage sides, and can measure the transformation ratio and angle of the non-integral point transformer.
4. Hexagonal diagram display function: the test results are displayed in numbers and hexagonal vector diagrams to visually see the connection group status of the transformer.
5. 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 externally short-circuited, and the wiring method can be automatically switched according to the selected test content. It is completely possible to measure the transformation ratio and group number of transformers without a nameplate.
6. Tap test: It can quickly measure the transformation ratio and transformation ratio error of 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.
7. It has two functions of turns ratio measurement and operating voltage transformation ratio measurement at the same time. The operating transformation ratio can more truly reflect the actual value of the voltage transformation ratio under the actual operation of the transformer.
8. Good vibration resistance: the use of military connectors enhances the vibration resistance.
9. Adopt 5.6-inch high-definition true color LCD screen, display data effect and vector diagram effect intuitively and delicately.
10. The test source used by this instrument is a digitally synthesized standard sine digital source, with a distortion less than 0.1%, which is not affected by the quality of the working power supply.
11. Convenient to carry: small size and light weight.
12. A high-capacity lithium-ion rechargeable battery is optional, and the test can be completed on site without any power supply. It can continuously perform more than 800 measurements after a full charge.
Mobile version
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