Why do we need carbon dioxide fire extinguishers in the distribution room?

Foam fire extinguishers extinguish electrical fires will be electrocuted, electrical fires are Class E fires and only some dry powder fire extinguishers.

It is indicated that Class E fires can be extinguished, and CO2 fire extinguishers are suitable for A and E fires. Foam fire extinguishers are suitable for Class A and B. Class D fires require special fire extinguishers, and I haven't seen Class D fire extinguishers yet.

According to the combustion characteristics of the substance, fires can be divided into five categories: A, B, C, D, and E.

Class A fire: refers to a fire of solid matter. This substance tends to be organic in nature and generally produces hot embers when burned. Such as wood, coal, cotton, wool, hemp, paper and other fires.

Category B fires: Liquid fires and fires of meltable solid matter. Such as gasoline, kerosene, diesel, **, methanol.

Ethanol, asphalt, paraffin, etc.

Class C fire: refers to a gas fire. Such as coal gas, natural gas, methane.

Ethane, propane.

Hydrogen and other fires.

Category D fire: refers to a metal fire. Such as potassium, sodium, magnesium, aluminum-magnesium alloy and other fires.

Category E fire: refers to the fire of live objects and precision instruments and other substances.

Electrically generated fires are extinguished with carbon dioxide fire extinguishers.

Foam fire extinguishers extinguish electrical fires can cause electric shock, and electrical fires refer to the fire of materials such as live objects and precision instruments. Fire: Only some dry powder fire extinguishers indicate that they can extinguish the fire of live objects and precision instruments.

After the dry powder has been used, all the contacts on the electrical switches in this power distribution room have no mountains and no cracks to meet the requirements, because all the above are sucked with dry powder. The requirement for dust protection in the power distribution room is also a reinforcement of this. But there will be no such problem when using carbon dioxide fire extinguishers, so the fire extinguishers in the distribution room should be carbon dioxide.

How to use the fire extinguisher:

When extinguishing the fire, you can quickly go to the fire scene with a portable or shoulder-carried fire extinguisher, and put down the fire extinguisher about 5 meters away from the burning place. If you are outdoors, you should choose to spray in the upwind direction. If the dry chemical fire extinguisher used is an external pressure storage type, the operator should hold the spray gun with one hand and lift the opening ring on the gas cylinder with the other hand.

If the cylinder is opened on a handwheel, unscrew it in a counterclockwise direction to the highest position and lift the fire extinguisher. When the dry powder is sprayed, it is quickly aimed at the root of the flame. If the dry chemical fire extinguisher used is a built-in gas cylinder or a pressure storage type, the operator should first remove the safety pin on the opening handle, then hold the nozzle at the front end of the spray hose, and press down the opening pressure handle with the other hand to open the fire extinguisher to extinguish the fire.

When using a fire extinguisher or a pressure storage fire extinguisher with a jet hose, one hand should always press down the pressure handle and not let go, otherwise the spray will be interrupted.

Precautions for the use of fire extinguishers:

When using an ammonium phosphate dry powder fire extinguisher to extinguish a solid combustible fire, it should be sprayed at the place where the combustion is most violent, and swept up and down, left and right. If conditions permit, the user can carry the fire extinguisher and spray along the four perimeters of the combustible, so that the dry powder fire extinguishing agent is evenly sprayed on the surface of the combustible until the flame is completely extinguished. <>

Summary. Carbon dioxide itself is non-conductive and non-polluting, making it the preferred fire extinguisher for extinguishing electrical equipment. However, when the voltage exceeds 600V, the carbon dioxide will be broken down, which is a safety hazard. Therefore, carbon dioxide fire extinguishers cannot be used in the high-voltage distribution room.

Hello, is there a specification for the high voltage distribution room not to be equipped with a carbon dioxide fire extinguisher? Please advise.

Carbon dioxide itself is not conductive, no pollution and good pollution, and it is the first choice for fire extinguishing of electrical equipment. However, when the voltage exceeds 600V, the carbon dioxide will be broken down, and there is a safety hidden problem. Therefore, the high-voltage distribution room cannot be equipped with carbon dioxide to extinguish friends.

Ask about custom messages].

Foam fire extinguishers and dry chemical fire extinguishers will react chemically in the event of an electric spark, CO2 will not.

Dry powder and foam can affect the circuitry, while carbon dioxide does not.

Electrically generated fires are extinguished with carbon dioxide fire extinguishers, or which one do you want to use?

Water cannot be used in a fire caused by an electric generator, and water is electrically conductive.