1. The test equipment (resonant reactor, voltage divider, excitation transformer, etc.) should be placed as close as possible to the tested cable head to reduce the length of the test grounding wire, that is, to reduce the inductance of the grounding wire.
2. Adopt a specially designed one point grounding test grounding wire group. Special attention should be paid to keeping the test grounding wire as short as possible and not arbitrarily extending the length of the grounding wire.
3.During the experiment, the operator should not touch the metal casing of the control box except for the tuning and voltage regulating insulation knobs, otherwise there may be a slight stinging sensation when it is pierced or discharged on the high-voltage side. When conditions permit, it is recommended that operators work standing on rubber insulation pads.
4. The test transformer has three terminals: 800V, 1000V, and 1500V. When the required high voltage of the system is less than 15kV, the 800V terminal is selected. When the required high voltage of the system is greater than 15kV and less than 60kV, the 1000V terminal is selected. When the required high voltage of the system is greater than 60kV, the 1500V terminal is selected.
Transformer, GIS system, SF6 switch CT/PT, Insulators, busbars, cables, sleeves and other capacitive equipment are the most common electrical devices in substations. According to the requirements of the voltage withstand test regulations for primary electrical equipment in substations of 220V and below, the corresponding AC/DC voltage withstand test equipment must meet both high voltage and low current test conditions, as well as low voltage and high current test conditions. It is required to have a wide range of applicability and adopt the principle of series resonance. The main equipment consists of a variable frequency power supply control box (console), an excitation transformer, a reactor, and a capacitive voltage divider. The DC voltage withstand test can be completed by connecting a rectifier silicon stack and a microampere meter to the capacitive voltage divider. Due to its excellent filtering characteristics after resonance, the DC voltage produced by the system is superior to the DC voltage rectified by ordinary test transformers. It is an ideal high-voltage testing equipment for local, municipal, and county-level high-voltage testing departments, as well as power installation, repair, and testing engineering units.
Wuhan UHV specializes in producing series resonance (also known as series resonance test equipment) and has been engaged in the electrical measurement industry for many years. Its products have first-class quality and welcome customers to come and purchase.