OVERVIEW
The RD6000B anti-interference Transformer Tan Delta Test Set breaks through the traditional bridge measurement method, uses variable-frequency power supply technology, and uses single-chip microcomputers and modern electronic technology to achieve automatic frequency conversion, analog/digital conversion, and data calculation. It has strong anti-interference ability. Under 200% interference, the capacitance measurement accuracy can reach ± (reading × 1% + 1pF), and the dielectric loss factor accuracy is ± (reading × 1% + 0.00040).
The Transformer Tan Delta Test Set has a fast test speed and completes a measurement in about 40 seconds. The power supply adopts a high-power switching power supply, outputs 45Hz and 55Hz pure sine waves, automatically pressurizes 0.5- 10kV (resolution 1V, maximum output current 200mA), can automatically filter out 50Hz interference, and is suitable for sites such as substations with significant electromagnetic interference. The tester is widely used in dielectric loss measurement of various equipment in the power industry, providing strong support for equipment insulation performance evaluation.
CHARACTERISTIC
1. The instrument uses Fourier transform digital filtering technology to measure capacitance, dielectric loss, and other parameters. The test results are highly accurate, and automated measurement is easy to realize.
2. The Transformer Tan Delta Test Set uses frequency conversion technology to eliminate 50Hz power frequency interference on site, and reliable data can be measured even in a strong electromagnetic interference environment.
3. Use a full-touch ultra-large LCD display for simple operation. With a full-touch LCD and an ultra-large full-graphic operation interface, each process is obvious, and operators can use it without additional professional training. The entire process can be measured with a light touch.
4. Storage data: It is equipped with a calendar chip and a large-capacity memory inside, which can save the test results at any time, view the historical records at any time, and print them out. The current time and storage time can be displayed and printed anytime.
5. Scientific and advanced data management: The instrument data can be exported through a USB disk, and special software allows viewing and managing the data on any PC.
6. The Transformer Tan Delta Test Set is easy to operate, and a microprocessor controls the measurement process. Once the appropriate measurement method is selected, the microprocessor can automatically complete the data measurement.
7. The integrated model, with a standard capacitor and high-voltage power supply, is convenient for on-site testing and reduces on-site wiring.
8. With reverse wiring, the low-voltage shielding function, when the 220kV CVT busbar is grounded, 10kV reverse wiring dielectric loss measurement can be performed on C11 without removing the wire
9. It can perform an AC withstand voltage test. This is convenient for the PT and CT secondary AC withstand voltage test and the 400V low-voltage system withstand voltage test.
10. Able to identify the frequency of external high-voltage power supply 40Hz~70Hz, allowing the use of industrial frequency or series resonant power supply for large-capacity high-voltage dielectric loss test.
11. The CVT test function can realize the self-excitation method test of CVT. It can set four protection limits of high-voltage voltage/current and low-voltage voltage/current to ensure personal and equipment safety.
12. When testing CVT, it can automatically test the capacitance and dielectric loss of C1 and C2 and the total capacitance and dielectric loss of CVT equipment.
13. It has a built-in thermal printer for printing and output, a calendar clock that is convenient for users to issue test reports, and a USB flash drive output.
14. Grounding protection function: When the instrument is not grounded or poorly grounded, it will not enter the normal program and will not output high voltage. Overcurrent protection function: The instrument will not be damaged when the test product is short-circuited or broken down.
15. Electric shock protection function: When the instrument operator accidentally gets an electric shock, the instrument immediately cuts off the high voltage to ensure the safety of the test personnel.
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FAQ
Q: What is the tan delta test of CVT?
A: The Tan-δ test of a CVT is conducted at the high-frequency point after disconnecting its earth and the neutral point of the Electro Magnetic Unit (EMU). The HV lead from the Tan-δ kit is connected to terminal A, and the LV lead to terminal B for measuring C1.
Q: What is the UST and GST mode in the tan delta test?
A:
UST (Ungrounded Specimen Test): This mode is used when the object being tested is not grounded, providing the most accurate results.
GST (Grounded Specimen Test): This mode is used when the tested object is permanently grounded and is typically applied to outdoor power systems.
Q: Is power factor the same as tan delta?
A: The power factor and tan delta (tan δ), also known as the dissipation factor, are closely related but not precisely the same. Measuring the power factor or tan delta effectively assesses the insulation condition of circuit breaker components.
