What is the rule book about?

First of all, we go a little into theory and provide you with a set of rules for JV 9.13130. 2009 which states the following:

1. Powder Gahzlycan extinguish electrical equipment up to 1000 volts.
2. Carbon dioxide Gahzlyare allowed to extinguish electrical installations under voltages up to 10,000 V (10 kV).
3. If the water vapor content of carbon dioxide exceeds 0.006%, and the length of the fire extinguishing agent is less than 3 meters, carbon dioxide can only be used to extinguish electrical equipment up to 1 kV.

It seems that everything is clear, but what nuances should be taken into account when turning off electrical appliances and electrical installations? This is not specifically written in codes of practice or in EMP.

That is why we will talk in more detail about the types of fire Gahzlythat are allowed to be used to extinguish wires or even a switchboard.

Overview of existing tools

Foam and water

If the electrical power is not energized, then with special permission it is permissible to extinguish the fire using water or foam type fire Gahzly(OVP, OHP, OV series). This permission is granted by the dispatcher of the power supply department where the accident occurred. The reason the dispatcher must give permission is an apparent break in the cable line supplying the burning electrical equipment.

In other cases, water and foam fire Gahzlycannot be used to extinguish electrical appliances, especially when they are energized.

powder

If the ignition occurred on a section of the mains with a voltage of up to 1000 V (for example, the ignition of an electrical panel), you can extinguish the wires with a powder fire extinguisher. These tools quickly extinguish the flame, because a layer of inert powder prevents the ingress of oxygen to the ignition site of electrical equipment. OP series fire Gahzlyare particularly effective in extinguishing burnt-out insulation in electrical installations. It should also be noted that the powder type of products can be used even under electrical voltage, if it is not higher than 1 kV.

Carbon Dioxide

Well, OU series carbon dioxide fire Gahzlyare the most effective in extinguishing electrical equipment and electrical appliances. Flame elimination occurs due to the low temperature of the fire extinguishing material, which will not only bring down the fire, but also cool the burning parts of the insulation. Of the disadvantages of carbon dioxide, only harmful evaporation of this substance can be noted. Therefore, it is prohibited to turn off electrical installations in enclosed spaces.

As for the advantages compared to means of OP type, the following can be distinguished:

1. Carbon dioxide leaves no residue after evaporation and at the same time does not harm burning electrical equipment. This is especially important when computers are turned off or a television is on. Why, it’s clear.
2. Carbon dioxide fire Gahzlycan extinguish electrical installations with voltages up to 10,000 volts (10 kV).

Summing up

So we checked which type of fire Gahzlyextinguishes electrical installations and electrical equipment. If the question arises of eliminating a fire in your home, where the voltage cannot be more than 380 V (0.4 kV), you should turn off the electricity, and then use either a powder or carbon dioxide type of product.

If switchboards are extinguished under voltage up to 10 kV, we strongly recommend that you try to turn off the power first, and then proceed to eliminate the flame source. There are frequent cases when an accident occurs when extinguishing electrical installations under voltage – a person gets a shock. One of the causes of defeat is the occurrence of an electric arc from electrical equipment with damaged insulation.

Finally, to summarize which fire Gahzlycan put out electricity with different voltages:

1. 400 V (0.4 kV) – powder, carbon dioxide, freon, water and foam (the last two in the absence of power at the emergency site).
2. 1000 V (up to 1 kV) – powder and carbon dioxide.
3. 10,000 V (up to 10 kV) – carbon dioxide.