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Talk about the principle and function of variable frequency series resonant voltage withstand test equipment

Variable frequency series resonant withstand voltage test equipment is mainly used for AC withstand voltage test of cross-linked cable, hydraulic generator, main transformer, bus, GIS and so on. It is composed of variable frequency control power supply, excitation transformer, reactor, capacitor voltage divider and compensation capacitor. Because the voltage, waveform and frequency and the electric field state inside the insulation of the tested object are consistent with the actual operation, and the test voltage is higher than the actual operation voltage, therefore, the insulation strength is strict, direct and effective method.

Overview of Operation Test of Electrical High Voltage Test Equipment

In addition to the long-term operation under rated voltage, the power generation, supply and consumption equipment in the power system must have the insulation strength under overvoltage. Overvoltage refers to the voltage rise that exceeds the normal operating voltage, which is the damage of electrical equipment or protective equipment. In all kinds of power system accidents, a large part is caused by the insulation damage of equipment caused by overvoltage. When the insulation is defective, if it is not found and eliminated in time, it will eventually lead to equipment damage and power failure.

Characteristics of gas-filled test transformer

The inflatable test transformer is a brand-new test equipment, which adopts the characteristics of GIS combination cabinet, with small quality, light volume and beautiful appearance. Its technical indicators have reached the standard requirements, high insulation strength, compressive strength for the same pressure of nitrogen 2.5 times, 2.5 times the breakdown voltage of air. It is equal to the breakdown voltage of oil at 0.25MPa and twice the breakdown voltage of oil at 0.45MPa.

Prevent all-out of substation caused by bad weather

Wuhan Zhongke Xinyi Power Technology Co., Ltd. (abbreviated as: Zhongke Xinyi) is a new type of power technology company established by relying on the restructuring of Wuhan High Voltage Research Institute and China Electric Power Research Institute. A high-tech enterprise integrating R & D, production, sales, consulting and power technology services of meters, battery DC system testing, power online monitoring system. The company has a full set of power testing equipment, power testing equipment for power engineering debugging company upgrade qualification. ZEC series relay protection tester, relay protection calibrator, zinc oxide arrester characteristic tester, high voltage switch tester, transformer tester, battery tester, etc.

The Importance of Electric Power Testing Instruments in the Development of Electric Power Industry

After nearly ten years of development, the functions of electric power testing instruments have gradually changed from simple and low-end to intelligent, miniaturization, networking and diversification. Precision, performance stability, communication means and protocol openness are also further improved, the development and popularization of intelligent power testing instruments, relying on intelligent power meters energy management, Internet of Things, smart grid and other applications have become the focus of future development.

Brief Analysis on the Development Status of Electric Power Testing Instrument Industry

The construction of smart grid has a significant impact on the development of the power testing instrumentation industry, and provides a broader development space for the power testing instrumentation industry (both opportunities and challenges). Equipment manufacturers should change the traditional way of thinking and the business model based on instrument production as soon as possible, give full play to the industry's advantages in information collection, and improve the system architecture and technological innovation capabilities, transform to a technology-led enterprise to strive for long-term benefits and rapid development in the construction of smart grids.

Product Label

instrument

capacitor

battery

DC system testing instrument

oscillation

moisture