Product Details

 Variable frequency dielectric loss tester manufacturer direct sales is a new type of intelligent variable frequency dielectric loss tester. With the continuous deepening of urban and rural power grid transformation, more and more high-voltage substations are being built. The phase reversal method and phase shifting method can no longer meet the needs of on-site testing. Heterodyne frequency measurement (variable frequency) converts 50Hz to other frequencies to eliminate interference. However, due to the limitations of electronic technology, the frequency after conversion is generally at a certain distance from 50Hz. The capacitance value cx and tgδ value under 50Hz conditions are converted and simulated, which has a certain deviation from the real power frequency test. Especially for a few test objects, the measured data has obvious errors. After comprehensive comparison, a new type of dielectric loss tester has been developed. Its principle does not change the frequency, and it can obtain the capacitance value cx and tgδ value under 50Hz conditions, improving measurement reliability and accuracy, completely suppressing electric field interference, and meeting the requirements for use under electric fields. This instrument has the smallest volume and lightest weight, making it easy to carry. It has flexible expandability, can be connected to a computer via an interface, uses powerful software accessories for instrument upgrade, and features humanized design and fully automatic operation. This instrument is suitable for testing at substations with interference up to 500kV and below. This instrument has been appraised by the National Electric Power Research Institute and industry experts, and has been certified by the National High Voltage Metering Station. It has been used in multiple substations in Jiangsu, Hunan, Guangdong, Yunnan, Liaoning, Sichuan, etc., providing reliable data for condition-based maintenance. The fully automatic variable frequency dielectric loss tester breaks through the traditional bridge measurement method, adopts variable frequency power supply technology, uses single-board computers and modern electronic technology for automatic frequency conversion, analog/digital conversion, and data calculation; achieving strong anti-interference ability, fast test speed, high precision, fully automatic digitization, and easy operation; the power supply uses a high-power switching power supply, outputs pure sine waves of 45Hz and 55Hz, automatically boosts voltage, and can provide a maximum voltage of 10 kV; automatically filters out 50Hz interference, suitable for on-site testing in substations and other places with strong electromagnetic interference. Widely used in the power industry for dielectric loss measurement of transformers, mutual inductors, bushings, capacitors, arresters, and other equipment.

Performance Features

◆ Multiple measurement modes: positive/reverse wiring, internal/external standard capacitors, CVT measurement (no external booster required, built-in power supply), internal/external test voltage. C1/C2 can be measured simultaneously.

◆ High measurement accuracy and good repeatability: The instrument has very high test accuracy, with a basic error of dielectric loss test less than 0.0005, and the test data repeatability is excellent.

◆ In case of high-voltage short circuit or sudden power failure, the instrument can quickly cut off the high voltage and issue a warning message.

◆ High-voltage output socket, no exposed parts, safe and reliable.

◆ High-voltage insulated wire: The insulation level of the high-voltage wire not only involves safety but also its leakage to ground directly affects the accuracy of reverse connection testing. The high-voltage output wire of this instrument is specially made of special materials and can be used directly on the ground. At 10KV output, there is no discharge, no leakage, and no sound to ground.

◆ Large screen Chinese prompt operation, RS232 computer interface. The instrument comes with a built-in printer to print test data in time.

◆ Anti-vibration performance: The instrument adopts a unique anti-vibration design, which is shock-resistant and not easily damaged.

◆ Easy to carry: The volume of this instrument is about 70% of similar products, making it very convenient to carry.

Precautions

1. When using, the grounding terminal of the instrument must be reliably grounded.

2. Only when the instrument power is turned off and the test voltage selection switch is set to the "Off" position, it is considered safe to touch the rear of the instrument and its measurement cables and the test object.

3. During measurement, it is strictly forbidden to operate the "Test Voltage" selection switch.

4. In positive wiring method, the UH terminal is high voltage; in reverse wiring method, the IX terminal is high voltage. When using, the cable with high voltage must be kept at a sufficient distance from the ground according to the actual situation.

5. Do not replace the fuse with one that does not match the panel indication value (one internal fuse is 0.5A).

6. When using, try to use the cables provided by the manufacturer with the instrument to ensure measurement accuracy.

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.