The role of lightning protection detection ground resistance detection

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The AC power lightning protection module is suitable for the power protection of power distribution rooms, power distribution cabinets, switch cabinets, AC and DC power distribution panels, communications, electronics, power, networks, energy, railways, highways and other systems; · There is outdoor input in the building Power distribution boxes and building-level distribution boxes; · Used for low-voltage (220/380VAC) industrial power grids and civil power grids; · Signal lightning arresters are used for line intrusion over-voltage protection; lightning rods are used for direct lightning protection; in power systems Among them, it is mainly used for the three-phase power input or output terminal in the power supply screen of the main control room of the automation machine room and the substation.
1. Detect the effectiveness of lightning protection devices, the connectivity of air-termination devices, down conductors, and grounding devices.
2. The effective grounding resistance of the grounding system is required to be ≤10Ω.
3. Whether the ground insulation resistance of the power supply lightning protection system is at the allowable value, whether the grounding system is reliable, whether the instantaneous clamping value has changed, etc.
4. Information system signal lightning protection system, whether the connected resistance belongs to the allowable value of the parameter, whether the instantaneous clamping value has changed, the normal value of the insulation resistance to the ground, etc.
Grounding resistance is the resistance encountered when current flows from the grounding device to the ground and then flows through the ground to another grounding body or spreads far away. The grounding resistance value reflects the good degree of contact between the electrical device and the "ground" and reflects the scale of the grounding grid.
The grounding resistance meter is mainly composed of a hand-cranked generator, current transformer, potentiometer and galvanometer.
Grounding resistance detection: The function of grounding resistance is to connect current to the ground to avoid hidden dangers to people caused by live equipment in buildings. It is an indispensable content in the lightning protection checklist, from the setting of grounding layout to the inspection of grounding materials and lightning protection detection Through professional analysis of the data, we can detect whether the grounding resistance material meets the requirements of the specification.

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