The electrical grounding system of generator set is introduced to the function of equipment

Most people often only know that grounding can prevent people from receiving electric shock. In fact, in addition to this role, it can also prevent equipment and route from being damaged, prevent fire, prevent lightning strikes, prevent static damage and ensure the normal operation and use of the power system. The following is by Wanda Shenzhou to introduce some about the role of electrical grounding system on equipment.

The impedance of the human body and the condition of the environment has a great relationship, the more humid the environment, the lower the impedance of the human body, the more prone to electric shock. For example, people who have installed their own AC radio have almost always received an electric shock, but they have almost always been able to get rid of the power because they are in a dry environment and their skin is dry. Grounding is an effective way to prevent electric shock.

After the electrical equipment is grounded through the grounding device, the electrical equipment potential is close to the ground potential. Due to the existence of ground resistance, the ground potential of electrical equipment always exists. The greater the ground resistance of electrical equipment, the greater the ground potential of electrical equipment when failure occurs, and the greater the risk of human touch.

However, if the grounding device is not set, the voltage of the fault equipment housing is the same as the voltage of the phase line to the ground, which is much higher than the grounding voltage. Therefore, the risk also increases correspondingly. The electrical device or a point of the live part of the electrical line is connected with the earth, and the artificial connection of the electrical device or other devices is called grounding. It can also be said that power equipment, tower or overvoltage protection devices are connected to the earth with ground wires through metal conductors embedded in the ground and directly in contact with the earth. The grounded part of the power system is usually the neutral point or a point on the phase line. The grounded part of the electrical equipment is the metal conductor that is not charged under normal circumstances, usually the metal shell.