Main Technical Indicators of FVG-8/70 DC Test Sending Instrument
Output Voltage: 8kV Output Current: 70mA Power Supply: AC220kV, 50Hz
FVG-8/70 DC Test Sending Instrument is an instrument used to test the withstand voltage capability of various electrical devices, insulating materials, and insulating structures. The process of applying high voltage to insulating materials or insulating structures without damaging their performance is called a withstand voltage test. The main purpose of a general withstand voltage tester is to check the ability of insulation to withstand working voltage or overvoltage, thereby verifying whether the insulation performance of the product equipment meets safety standards!
Keywords: DC Test Sending Instrument FVG-8/70, DC Test Sending Instrument FVG-8/70, DC Test Sending Instrument FVG-8/70
Functional Features of DC Test Sending Instrument FVG-8/70
1. Personal safety protection design: after stopping high voltage, cutting off power, or unexpected power failure, it automatically discharges first;
2. The output high-voltage wire is configured long enough (35m), suitable for various on-site uses, and designed for easy carrying;
3. Impact-resistant, anti-interference, built-in power protection, automatic power-off when power exceeds;
4. Integrated design, easy to carry, suitable for field operations;
5. Large capacity, output current up to 70mA (reserved to 100 mA);
6. Simple operation, only need to operate the closing/opening and voltage-raising knobs;
7. Intuitive panel, output voltage and leakage current can be directly observed from the meter;
8. Linear voltage rise, high control accuracy of high-voltage output;
9. Zero-position start high-voltage protection function;
10. Overcurrent protection function;
11. Internal anti-vibration design, reliable equipment use.
12. The panel should have operating instructions, operation steps, and precautions. Yangzhou FVG-8/70 DC Test Sending Instrument manufacturer
Technical Parameters of DC Test Sending Instrument FVG-8/70
1. Power: 600W, can output 8kV/70mA for a long time;
2. Power supply: AC220V 50Hz, with a wide voltage range design of at least 160V.
3. Generator power supply requires a 2-kilowatt generator
On November 18, the "DC Test Sending Instrument" declared by Liuzhou Power Supply Bureau of Guangxi received the national utility model patent certificate issued by the State Intellectual Property Office. This is the third national utility model patent obtained by Liuzhou Power Supply Bureau.
It is understood that in the past, after a fault occurred in a 10kV distribution line, the normal handling method adopted by Liuzhou Power Supply Bureau was to conduct a full-line inspection and use an insulation megger to judge the insulation resistance of the line to find the fault, that is, the insulation test comparison method. This method is relatively effective for pure overhead lines, but now pure overhead lines are very rare, and most are mixed lines of overhead lines and cables. Not only can inspection not detect cable faults, but because cable faults are mostly high-resistance faults, under special circumstances, the insulation resistance of the normal section is even lower than that of the faulty section, making it difficult for repair personnel to judge from test data, with the possibility of misjudgment exceeding 50%.
To solve the above problems, after conducting segmented insulation tests on distribution lines, repair personnel adopted the method of trial sending with the power supply system, that is, disconnecting the switches of pole-mounted switches or switching stations on the distribution line, dividing the line into several sections, and using the power supply system to trial send section by section. When the switch of a certain section is closed and the protection action of the power supply system or a grounding signal occurs, it proves that this section is the faulty section. However, this method has great risks. It may not only cause large-scale short-term power outages or affect voltage quality for users, but also cause great impact on the power supply system. In addition, during the insulation test process of the faulty distribution line, the distribution line is in a cold standby state. Once a user improperly uses a generator and feeds power back to the line, forming instantaneous high voltage on the distribution line, it is very likely to cause electric shock to test personnel.
The DC test sending instrument developed by Liuzhou Power Supply Bureau applies the DC test sending method. The input is a voltage equivalent to the operating voltage, which has no damage to the line, and the result is a qualitative result. Through the DC generator, it can input 8kV DC voltage, indicating that this section of the distribution line can transmit power normally; during the DC input process, if the 8kV DC generator protection action is not reached, it indicates that this section of the distribution line has a fault.
