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Problems with the installation location of the distribution box

(Summary description)The improper installation position of the distribution box not only affects the city appearance and appearance, but also is vulnerable to external forces. It is recommended to comprehensively consider

Problems with the installation location of the distribution box

(Summary description)The improper installation position of the distribution box not only affects the city appearance and appearance, but also is vulnerable to external forces. It is recommended to comprehensively consider

Information
The improper installation position of the distribution box not only affects the city appearance and appearance, but also is vulnerable to external forces. It is recommended to comprehensively consider choosing an appropriate installation location.
 
Some protection-connected power supply systems still use a three-phase four-wire system. The low - voltage grid has a longer neutral line and a larger impedance. When the three-phase load is unbalanced, the zero-line current will pass through the zero-line current. , Lead aging, moisture and other factors, the leakage current of the lead through the zero line also forms a closed loop, causing the zero line to carry a certain potential, which is very unfavorable to safe operation. A three-phase five-wire power supply is recommended. Because the working neutral and protective neutral wires connected to the electrical equipment are laid separately, they can effectively isolate the dangerous voltage caused by the three-phase four-wire power supply mode. The shell of the electrical equipment is always at "ground potential", thereby eliminating Hazard of dangerous voltage generated by the equipment.
 
The distribution box is too small, the gap between the electrical appliances and the phase to phase is small, and some have no obvious disconnection points, which not only brings danger to the electrician operation,  but also makes it impossible to replace the fuse and other work under power in rain and fog. ; The distribution box generally lacks phase loss protection, and accidents due to phase loss and burnout of the motor occur from time to time; some distribution boxes do not use electronic energy meters, and remote centralized meter reading cannot be implemented; some distribution boxes are closed all year round,  Lack of routine maintenance.

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Copyright © 2020 Jiangsu Matech Intelligent Technology Co., Ltd.
苏ICP备12013657号
Powered by www.300.cn