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The power distribution room is an important place for the entire building to use electricity, and lightning protection measures are also an essential step. The rapid development of modern society, all kinds of smart devices such as flowers and charming eyes, have brought a lot of convenience to human life, but at the same time there are many drawbacks. The internal structure of all kinds of electrical equipment is mostly metal, so the parts are more subtle and dense, and are easily damaged by lightning. Therefore , lightning protection in the power distribution room is a safety guarantee.
To detect the equipment room, power distribution room, etc., the measurement point must be selected first. The measurement points of our company are mainly selected in the equipment cabinet, rack, electrostatic floor rack, metal partition, lightning arrester down conductor, power distribution system grounding, metal doors and windows Wait for a place. Secondly, measure the grounding resistance, visually inspect the shielding of the power distribution room, the materials and specifications of the busbars, the materials and specifications of the equipotential bonding wires, the power supply and the signal, the SPD model on the network line, the match of the lightning flow, and the down conductor Materials and specifications, as well as the external lightning protection environment, etc.
Before the measurement, the inspector should calibrate the instrument and measure the cable resistance of the extension cable. After that, the measurement result is the number displayed on the instrument minus the resistance of the extension cable. The extension cable resistance should be clearly written on the original test record. The power distribution room has a high-voltage power distribution room and a low-voltage power distribution room. Anti-static clothing should be worn during testing and should not be negligent. Touch the electrostatic discharge device before entering the door, and try not to touch other charged objects except the monitoring point.
When measuring a case or a cabinet, if the resistance is too large, it may be that the case is painted with paint, and you can carefully wipe off the paint with a file. After the inspection, take a photo with the personnel of the inspected unit on site, draw a distribution map of the equipment, and send a lightning protection inspection -lightning protection acceptance report with real effects to the inspected unit according to the contract date.
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Ningbo World Wide Electric techonology CO.,Ltd , https://www.ningbomachine.com