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Overview of ZLJD-20A Ground Lead Down Conductor Resistance Tester
The reliable and effective connection between the grounding down conductors of power equipment and the grounding grid is the fundamental guarantee for the safe operation of equipment. The grounding down conductor is the connecting part between the power equipment and the grounding grid. During long-term operation of power equipment, the connection point may be affected by factors such as moisture, leading to corrosion or even breakage of the contact, which increases the resistance at the connection point between the grounding down conductor and the main grounding grid, failing to meet the requirements of power regulations, posing safety hazards during operation, and in severe cases, causing equipment to operate without proper grounding. Therefore, in the "Twenty-Five Key Requirements for Preventing Major Accidents in Power Production," it is explicitly stated that the conduction test of the grounding device down conductors should be carried out once a year.
The Ground Conduction Resistance Tester is a highly automated portable tester developed by our company, used to measure the conduction resistance between the grounding down conductors of various power equipment in substations. The instrument is controlled by a high-performance microcontroller, enabling intelligent testing processes. It features small size, portability, simple operation, high accuracy, fast testing speed, good repeatability, and intuitive readings, making it an ideal specialized instrument that meets regulatory requirements.
ZLJD-20A Ground Lead Down Conductor Resistance Tester Functional Features
1. The whole machine is controlled by a high-speed microcontroller, with high automation and simple operation.
2. The instrument adopts new power supply technology, with multiple current ranges and wide measurement range.
3. Complete protection functions, reliably protecting the instrument from back EMF impact, with more reliable performance.
4. Equipped with audible discharge alarm, clear discharge indication, reducing misoperation.
5. Fast response speed, can directly switch the on-load tap changer in measurement state, and the instrument automatically refreshes data.
6. Intelligent power management technology reduces internal heat generation and saves energy.
7. The instrument has a built-in non-volatile clock.
8. The instrument has a built-in non-volatile memory that can permanently store data.
ZLJD-20A Ground Lead Down Conductor Resistance Tester Technical Specifications
1. Output current: 2.5A, 5A, 10A, 20A
2. Range: 100μΩ～1Ω (20A)
500μΩ～2Ω (10A)
1mΩ～4Ω (5A)
2mΩ～8Ω (2.5A)
3. Accuracy: 0.2%
4. Resolution: 0.1μΩ
5. Operating temperature: 0～40℃
6. Ambient humidity: ≤90%RH, no condensation
7. Power supply: AC220V±10%, 50HZ±1HZ
8. Net weight: 13KG
9. Dimensions: 440mm*240mm*390mm
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