Solar street lamps system earthing and lightning protection device related introduction

In order to safe, prevent to get an electric shock, solar lighting system should be chosen grounding device. Grounding can be divided into operation, protection grounding and lightning protection grounding. 1, homework grounding: the low voltage power grid neutral directly grounding, system grounding resistance should be less than

in order to safe, avoid electric shock, solar lighting system should be chosen grounding device. Grounding can be divided into operation, protection grounding and lightning protection grounding.

1, homework grounding: the low voltage power grid neutral directly grounded system grounding resistance should be less than 10 & Omega; 。

2, protect the earth, in order to avoid the leakage of equipment endangers one's personal and equipment safety, shows all the electrical equipment can be conductive parts through the grounding line, grounding resistance should fit the leakage protector equipment action requirements. Grounding:

3, in order to avoid lightning strike, electric equipment, lightning rod, wire, and lightning arrester grounding lightning protection devices, such as grounding resistance should be less than 10 & Omega; 。

4, connect a zero: the metal casing of electrical equipment, metal frame and neutral ground wire, etc.

ground should choose insulated wire, and use the whole line, the center is not allowed to have a joint. The lightning arrester grounding wire should be choose the shortest distance to the grounding line. Protection equipment S&le phase line cross-section; 16 was, minimum sectional area of the grounding line and line S; 1635, minimum sectional area of the grounding line and line S / 2. Grounding flat steel wire welding length & ge; 2 times the width of the flat.