A good grounding system is an important guarantee for personal safety, equipment safety, and stable system operation. Grounding can be divided into five categories based on its function and requirements: lightning protection grounding, working grounding, protective grounding, DC working grounding, and repeated grounding. The specific details are as follows, which will be introduced by the editor of graphite grounding:

1. There are two basic forms of lightning overvoltage:

One is: direct lightning - also known as direct lightning strike

Secondly, lightning induction - also known as induced lightning

2. The function of the lightning arrester:

A lightning arrester is a metal body used to receive direct lightning strikes, and it must be connected to the grounding device through a grounding lead wire.

3. The function of lightning rod:

The function of lightning rod is actually to trigger lightning, it is used to protect against direct lightning strikes.

4. Types and functions of lightning arresters:

The commonly used lightning arresters include valve type, exhaust type (pipe type), zinc oxide, etc.

Lightning arrester is used to protect the insulation of the protected object from lightning overvoltage invading the transformer and distribution room or other buildings along the line. Zinc oxide lightning arresters are commonly used outdoors in power distribution rooms, while valve type lightning arresters are commonly used indoors.

5. Common lightning protection measures for factory transformer and distribution rooms:

The method of protecting against direct lightning strikes by using lightning rods (or lightning wires, lightning belts, lightning nets) to prevent lightning wave intrusion is lightning arresters.

6. The concept of safe current:

Safe current refers to the maximum current that can escape from a human electric shock. The safe current stipulated in our country is 30mA (50HZ). The safety current is related to factors such as the duration of electric shock, the nature of the current, the current path, body weight, and health status.

7. Concept of Safe Voltage:

Safe voltage refers to the voltage that does not directly cause death or disability to people. The safety ultra-low voltage stipulated in our country is 36 volts.

The above is the sharing of the editor about graphite grounding, hoping to help more people~