Solar street lamps must be designed with down-lead and ground network, which constitute an external lightning protection system.
It can avoid fire and personal safety accidents caused by direct lightning of LED street lamps, and protect equipment by setting voltage protection, etc. The system can prevent induction lightning and other forms of overvoltage intrusion, the power supply is destroyed, which cannot be guaranteed by the external lightning protection system. The two are complementary and complementary.
1. Lightning protection and grounding: in order to prevent electrical equipment from lightning strike, lightning rods, lightning rods, lightning arresters and other lightning protection devices should be grounded, and the grounding resistance should be less than 10Ω.
2. The problem of street lamp circuit: Install a special photovoltaic DC lightning protection device.
The lightning protection device is mainly designed according to the power supply voltage. In thunderstorm weather, the circuit of LED solar street lamp
will generate sudden peak voltage or current due to electrostatic induction or electromagnetic induction, this will affect the LED solar street lamp equipment, and in severe cases, solar street lamps will also be damaged by lightning.
3: zero connection: connect the metal shell and metal frame of electrical equipment with the neutral ground wire. The ground wire should use insulated wire and use the whole wire. No joints are allowed in the middle.
4: protective grounding: in order to prevent the leakage of equipment from endangering the safety of people and equipment, all exposed conductive parts of electrical equipment are grounded through the grounding wire, and the grounding resistance should meet the installation action requirements of the leakage protector.
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