Aerosol Systems for Industrial Power Supply System

Basic Description

With the rapid development of industrial production, the Power supply system plays an increasingly important role in industrial production, so the fire safety prevention work of this system is becoming more and more prominent.
The whole power supply system is made up of cables to connect the parts as a whole, So when a fire breaks out in one part of the system, The fire can quickly spread to other sites along transmission cables and cause huge economic losses finally.

In addition, most of the insulation materials of the electric cable are organic polymer materials, when burning can produce a large amount of toxic smoke, Endangering people’s lives at the site.

So It is particularly important to do a good job in fire safety of the industrial power supply system, in case of fire, we can quickly and effectively put out the fire, It is of great significance for the protection of personal and property safety, Aerosol extinguishing systems are products that can quickly and effectively extinguish Class B fires and electrical fires.

Features and Characteristics of Aerosol Systems

Aerosol extinguisher is a kind of product different from other kinds of gas fire extinguishing devices, it has many features that many other products do not have: easy to operate and install, does not require a complex piping network system to work, cost-effective, long life span, simple to transport, non-toxicity, non-corrosion, lightweight and compact, highly efficiency in fire suppression, most importantly, it can be designed as per actual space dimensions, so Very suitable for use in various complex places of industrial power supply system.

So what are the fire characteristics of industrial power supply system, we conclude with the following three key points:

1. Fires spread rapidly.
   Industrial power supply systems are used to distribute and transmit high-power electric energy, and the power cables are mostly oil-impregnated paper insulation, rubber insulation, and plastic insulation, These materials and the insulating oil of the cables are combustibles, once on fire, The fire will spread quickly to various places along the cable.
2. Large smoke, high toxicity.
   The fire combustibles of industrial power supply systems are generally cable insulation layer, insulating oil, power generation oil, and other combustibles, All of these substances are subject to incomplete combustion, Produce a lot of black smoke, And can decompose a variety of toxic substances such as CO, aromatic compounds, alkane, etc.
3. Firefighting is difficult.
   When a fire occurs in a place of industrial power supply system, it will be very difficult to extinguish the fire, Such as cable tunnels, cable trenches, cable inter-layers, cable shafts, etc. Because of the small space and because the brackets are densely arranged, it is difficult for firefighters to approach the fire source, delaying the firefighting work.

Analysis of Fire Causes in Industrial Power Supply Systems and Application of aerosol extinguishing systems

1. Applications in cable tunnels, cable trenches, cable inter-layers, cable shafts.

Cable tunnels, cable trenches, cable inter-layers, and cable shafts are all places where cables are laid, However, the insulation layer of the cable may be destroyed or the insulation strength may be reduced during the period of the cable laying or long-term use, resulting in a short circuit, An electric arc is created which causes combustion; And when laying oil-filled cables, Increase the drop not following requirement, cause the phenomenon of oil leakage, there is also a risk of fire; other factors also will cause the fire: long-term overload use, poor joint contact, the outside fire jumped in and so on.

The internal environment of cable tunnels, cable interlayers, and cable shafts is generally narrow, low, long in length, and high in height, with dense internal scaffolds, fewer exports, and a complex environment. Such sites make it difficult for many piping network fire extinguishing systems to function, but aerosol fire extinguishing devices are especially suitable for this complex place. Take China Baowu Steel Group Corporation Limited as an example, its cable tunnels of 2 power supply plants, cable tunnels of 3 steel-making plants, 4 cable trenches of cold rolling mills all have been used our wall-mounted aerosol fire extinguishing devices and Minisol aerosol generators, with a total quantity of 202 sets, these cable trenches with length over several hundreds of meters and height over 2 meters, width over 2 meters, the cable is laid on the side wall.

According to site conditions, the fire extinguishing system is installed on the top of the cable trench, in cable inter-layers, we also installed 20 sets of minisol aerosol devices.
All the above projects have passed the acceptance of the fire supervision department, operating normally.

2. Application in power distribution rooms, control rooms, and electromagnetic stations.

The main cause of fire in the control rooms, power distribution rooms, and electromagnetic stations are caused by various switches and cables, In addition, there are other combustible materials in the room that cause fires due to external causes. These places are generally equipment-concentrated areas.
Since electrical equipment is generally not allowed to use water systems, only can use gaseous fire suppression systems like FM200, IG541, and Carbon Dioxide, Particularly, aerosol suppression system also belongs to the gaseous fire suppression system, so also can apply in these places.

3. Application in transformer room.

The fire in the transformer room is generally due to the aging of the inner coil insulation layer of the transformer, poor oil quality, too little oil, poor contact, power overload, short circuit, and poor grounding, Making the combustibles inside the transformer subject to high-temperature decomposition, and then causing fire.
Transformers generally require good heat dissipation, so the transformer room is generally not sealed, The aerosol generator also has products specifically for partial protection of transformer fires, such as our Minisol aerosol fire extinguishers.

4. Application in diesel generator room.

The fire in the diesel generator room is generally caused by internal reasons or the spread of external fire, it is a Typical Class B fire caused by diesel burning.
At present, many industrial and mining enterprises have backup diesel generator rooms, and many generator rooms are located in closed spaces in the basement or semi-basement.

In such a space, aerosol fire extinguishing device can suppress the typical Class B fire.

5. Application in electrical cabinet and control panel cabinet.

Fires in electrical cabinets and control panels are generally due to short circuits or failures in the switch system, Causing the circuit in the cabinet to burn, This type of protection zone is composed of the internal space of the enclosure, This type of protection zone is a small space with good sealing performance, It is an ideal place for micro aerosol device, like our Minisol aerosol devices are widely apply in this kind of place now.

Matters needing attention during construction and operating

The starting method of aerosol products is generally to use an electric trigger to trigger the ignition powder, and to discharge extinguishing agent.
Electric triggers are sensitive to electromagnetic interference, The industrial power supply system transmits and runs all strong electricity, The electromagnetic interference in these occasions is very strong, so when aerosol products are installed in these places, the shielding requirements of the start line will be very strict, must be constructed in strict accordance with relevant specifications, Otherwise it will cause accidental spraying accidents.

The Conclusion

Aerosol extinguishing systems in industrial power supply systems, Especially cable tunnels, cable trenches, cable inter-layers, cable shafts, electrical cabinets, and control panels, The unique advantage of its application is that other fire extinguishing devices can not be compared, With the continuous development of its technology, Can fully meet the requirements of safety, efficiency, environmental protection, The application prospect of aerosol fire extinguishing system in this field will be better and better.