Variable Frequency Series Resonance Test Device Manufacturer
Variable Frequency Series Resonance Test Device Manufacturer is mainly used for capacitive equipment such as transformers, GIS systems, SF6 switches, CT/PT, insulators, busbars, cables, and bushings, which are the most common primary electrical equipment in substations. According to the test regulations for withstand voltage of primary electrical equipment in substations at 220V and below, the corresponding AC/DC withstand test equipment must not only meet the test conditions of high voltage and low current but also meet the conditions of low voltage and high current, requiring a wide range of applicability. Using the principle of series resonance, the main equipment consists of a variable frequency power supply control box (operating console), an excitation transformer, a reactor, and a capacitive voltage divider. By connecting a rectifier silicon stack and a microammeter to the capacitive voltage divider, DC withstand voltage tests can be completed. Due to the excellent filtering characteristics after system resonance, the DC voltage produced is superior to that obtained from the rectification of a conventional test transformer. It is an ideal withstand voltage device for prefecture, city, and county high-voltage test departments and power installation, repair, and test engineering units.
The variable frequency series resonance test complete device consists of a variable frequency power supply, an excitation transformer, a high-voltage reactor, and a capacitive voltage divider.
Variable Frequency Series Resonance Test Device Manufacturer Product Advantages
1. Reactors of the same voltage level and capacity are smaller in size and lighter in weight; the temperature rise is small under rated load; they adopt dry-type epoxy casting, with high mechanical strength, good electrical insulation performance, and are beautiful and reliable
2. The variable frequency power supply control box has a large capacity margin; strong protection functions; good output waveform; good stability; multiple working modes for convenient operation; it supports both single-phase 220V and three-phase 380V input power supplies, making it convenient for on-site power access
3. Flexible configuration. Different types of reactors can be selected to meet different test requirements, achieving multiple uses with one machine and high cost performance.
Precautions:
1. Before powering on the whole machine, carefully check whether all input and output connections are correct and firm, and whether the grounding is reliable. The grounding wire adopts single-point grounding, led out from the panel (use bare copper wire for the grounding wire).
2. During the test, the reactor should not be placed on conductive materials such as iron plates or copper plates.
3. Before boosting the voltage during the test, the overvoltage protection value needs to be set to prevent accidental tripping during the test.
4. When the variable frequency controller prompts overvoltage protection, overcurrent protection, or discharge protection, exit the test, re-set the voltage and current protection values, and then enter the test again.
