Precautions for Grounding Protection, What is Protective Grounding?

Grounding protection: Measures to ground the metal enclosure of electrical equipment.

Protective grounding is the grounding carried out to prevent the metal shell of the electrical installation, the frame of the power distribution device and the line tower from being charged to endanger the safety of people and equipment.

Working grounding refers to the direct connection of a certain point of the power system (such as the neutral point) to the ground, or the connection with the earth metal through arc suppression coils, resistors, etc., such as the neutral point grounding of transformers and transformers.

Protective grounding is a protective wiring method that reliably connects the metal part of the electrical appliance (that is, the metal structure part insulated from the live part) that is not charged under normal conditions and may be charged after the insulation material is damaged or under other circumstances. Protective grounding is the grounding carried out to prevent the metal shell of the electrical installation, the frame of the power distribution device and the line tower from being charged to endanger the safety of people and equipment. <

Protective grounding is a protective wiring method that reliably connects the metal part of the electrical appliance (that is, the metal structure part insulated from the live part) that is not charged under normal conditions and may be charged after the insulation material is damaged or under other circumstances. Grounding protection is generally used in the power supply system where the neutral point of the distribution transformer is not directly grounded (three-phase three-wire system), so as to ensure that the voltage to the ground generated when the electrical equipment leaks due to insulation damage does not exceed the safety range. Protective grounding is the grounding carried out to prevent the metal shell of the electrical installation, the frame of the power distribution device and the line tower from being charged to endanger the safety of people and equipment.

Protection grounding pronunciation: bǎo hù jiē dì

Definition of the term: A measure to ground the metal shell of an electrical equipment. It can prevent strong current from passing through the human body when the metal shell is energized in the case of insulation damage or accidents, so as to ensure personal safety.

Note: Insulation:

Isolated from the outside world or something, without contact.

Isolate the current so that it cannot pass through. Substances with extremely high electrical resistance can be used for insulation.

Grounding: In order to protect the safety of persons or equipment, the metal chassis or shell of the electrical and telecommunications equipment is connected to the ground wire.

Connect to the ground wire and use the earth as a current loop.

Circulation: Circulation; No stagnation: air circulation.

It refers to the circulation of commodities and currencies.

Electrified: 1Powered on. Such as: live work.

2.Charged. Such as: charged particles.

Protection: Doing everything possible to protect the rights and interests of women and children.

Protective grounding is to install grounding rods to make some household electrical equipment insulating protection to avoid the shell being electrified, resulting in the danger of electric shock. If the shell of the appliance is connected to the grounding body, it is called protective grounding. The value of the grounding resistance of the protective grounding should not exceed 4 ohms within the normal range.