Product Introduction:
According to the characteristics of small current grounding systems in distribution lines, when a fault occurs in the line, an insulation megger can be used to test insulation resistance to eliminate the faulty section; however, in actual practice, during rainy or humid weather or when line insulation is severely aged, the insulation test reading is around 0.5MΩ regardless of whether there is a fault, making it difficult to determine whether the line can be energized. Our company has designed and developed a DC test sending device, which involves the technical field of distribution line equipment manufacturing. It includes a voltage regulator, a transformer, and an AC contactor; the primary side of the transformer is connected to the AC contactor; the secondary side of the transformer is connected to the input end of a rectifier device; the rectifier device has an output end that provides a DC output voltage of 7 to 8 kilovolts and a current of 100 milliamperes; the secondary side of the voltage regulator is connected to the AC contactor; the AC contactor is connected to protective components. This equipment is mainly used for withstand voltage tests before energizing various distribution network lines, thoroughly overcoming the traditional hidden dangers of accidents caused by energizing based on line insulation, and resolving the contradiction between the dispatch office and the distribution department.
Main Functional Features:
1. Personal safety protection design: after stopping high voltage, cutting off power, or accidental power outage, it automatically discharges first;
2. The output high-voltage wire is sufficiently long (35m), suitable for various on-site uses, and designed for easy carrying;
3. The device does not require an external power supply, making it convenient to use:
4. Powered by lithium battery, no AC power supply needed, solving the confusion of on-site power sources:
5. Adopts high-frequency switching power supply principle, ultra-high voltage power supply, high stability, large output power, light weight
6. Impact-resistant, anti-interference, built-in power protection, automatic power-off when exceeding power;
7. Integrated design for easy portability, suitable for field operations;
8. Large capacity, output current up to 70mA;
9. Simple operation, only need to operate the closing/opening switch and the voltage boost knob;
10. Intuitive panel, output voltage and leakage current can be directly observed from the meter;
11. Linear voltage boost, high control accuracy of high-voltage output;
12. Zero-position start high-voltage protection function;
13. Overcurrent protection function;
14. Internal anti-vibration design, reliable equipment use.
Main Technical Specifications:
★ Power supply: Lithium battery 24V 2000AH,
★ Power frequency: 100KHZ
★ Output voltage: 8kVDC
★ Output current: 100mA
★ Weight: 6KG
★ Working time: not less than 6 hours (no need for 220V mains power on site)
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