Insulating Oil Dielectric Strength Tester Calibration Device
Oil Bdv Tester Calibration Instrument
Product description
The Insulating Oil Dielectric Strength Tester Calibration Device is a specialized equipment used for calibrating and verifying the accuracy of insulating oil dielectric strength testers. The device ensures that the tester provides precise and reliable measurements of the dielectric strength of insulating oils.
The calibration device is designed to simulate specific voltage and current conditions to generate test signals that closely resemble real-world operating conditions. By comparing the readings obtained from the insulating oil dielectric strength tester with the calibrated values from the calibration device, technicians can validate and adjust the accuracy of the tester.
The Insulating Oil Dielectric Strength Tester Calibration Device typically offers adjustable parameters and controls to match the calibration requirements of different tester models. It allows for precise calibration of voltage levels, waveform shapes, and other relevant parameters to ensure consistent and accurate measurements.
Using the calibration device helps maintain the reliability and performance of insulating oil dielectric strength testers by ensuring their measurements align with established standards and specifications. It is an essential tool for quality assurance, maintenance, and compliance in industries such as power systems, electrical equipment manufacturing, and oil analysis laboratories.
Device Composition
The entire insulating oil dielectric strength tester calibration device consists of the instrument host, high-voltage voltage divider (2), high-voltage splitter terminals, isolation module, high-voltage leads, sampling connecting cables and other components.
How to Calibrate the Transformer Oil Bdv Test Kit?
1.Single-edged Measurement Method
Open the oil tank's cover of the transformer oil bdv test kit, Remove any electrical frame and insulating sleeve, and leave only the fastened end of the electricity. By the test line of the high voltage terminal is connected to the electrical fastener, the grounding end of the AC high voltage table is connected to the ground end of the device to increase the voltage to the appropriate size, and keep unchanged. At the same time record the readings of the instrument and high voltage gauge's, Double the value of the high voltage gauge is the standard value of the output voltage.
2.Double-edged Measurement Method
Remove the two electrical frames and insulating sleeves, and connect the high-voltage terminals of two AC high-voltage gauges to the two electrical connections respectively, and the grounding terminals of the two high-voltage gauges are together with the grounding terminal of the equipment. The sum of the values of the two high-voltage gauges is the standard value of the output voltage.
Since the high-voltage output of the insulating oil withstand voltage tester is symmetrically grounded, the single-edged measurement method only needs to calibrate the ground voltage of one high-voltage terminal. The purpose of the middle tap is to reduce the voltage level to the ground output by the insulating oil withstand voltage measuring instrument and reduce the insulation level to the ground.
However, because the middle tap is difficult to be completely symmetrical, in order to reduce the error, the dual output measurement method measures the insulation at the same time. The voltage to ground of the two high voltage output terminals of the oil withstand voltage tester, but the final result is expressed by algebraic sum instead of vector test, there will be some additional errors.
Moreover, many insulating oil dielectric strength testers have a small power, and the input impedance of ordinary high voltage divider has been much larger than its rated power, so voltage drop is likely to occur during calibration. In foreign countries, when the insulating oil withstand voltage measuring instrument, an alternative method is used, and the oil cup is removed, and the size is properly suitable for the electrical fastener calibration device. The reading is an analog pointer indicating that the calibration device is designed to consider the load effect, but is limited to a volume, its accuracy is 3%, which can only be used for insulating oil withstand voltage measuring instrument below 10.
Breakdown Voltage Calculation Formula
(Vmax − Vmin )/(2*√2)
Vmax refers to the maximum value of the previous cycle prior to breakdown, Vmin represents the minimum value of the previous cycle prior to breakdown, and the difference between Vmax and Vmin is the peak-to-peak difference of the previous cycle before breakdown.
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