What are the dangers of fire in 110kV substation?

1. There is a possibility of **.

2. Burning violently will cause adjacent equipment to burn the cable.

3. It will lead to the interruption of power**.

4. The fire lasts for a long time and it is difficult to extinguish the fire.

Needless to say, the substation fire caused equipment damage and even **, affecting the normal power **.

One of the more dangerous is the cable fire, generally the flame retardant cable will produce harmful smoke after the fire, which is toxic to the human body and should be kept away.

Another source of danger is transformers, which can catch fire with transformer oil.

In addition, if the power distribution equipment catches fire, there is a risk of electric shock if the trip is not timely.

Therefore, the design of the substation will fully consider the fire hazard and adopt various preventive measures, such as fire barrier walls, fire blockades and so on.

Answer]: Shen Zhen D

Answer: D basis: Table 11 1 1 1 of the Code for the Design of Thermal Power Plants and Stations Lacking in Front of Substation (GB50229-2006): "The fire hazard of loose and crude oil-containing electrical equipment for outdoor power distribution is classified as Class E. ”

Hazards in industrial production processes are generally divided into seven categories:

1) Chemicals: toxic, flammable, explosive, corrosive and other dangerous goods;

2) Radiation: radioactive sources, radiation devices, and electromagnetic radiation devices, etc.;

3) Biological factors: biological factors such as animals, plants, microorganisms (infectious disease pathogens, etc.) that endanger the survival of individuals or groups;

4) Special equipment: elevators, lifting machinery, boilers, pressure vessels (including gas cylinders), pressure pipelines, passenger ropeways, large amusement facilities, special motor vehicles in the field (factory);

5) Electrical: non-normal, static and steady-state devices or operations such as high voltage or high current, high-speed movement, high-temperature work, and high-altitude work;

6) Civil engineering: construction engineering, water conservancy engineering, mining engineering, railway engineering, highway engineering, etc.;

7) Transportation: automobiles, trains, airplanes, ships, etc.

A hazard is a root cause or state factor that may cause injury or illness to a person, damage to material property, damage to the work environment, or a combination of these conditions. It is defined in the Occupational Health and Safety Management System Requirements GB T 28001-2011 as: a source, state or behavior, or a combination thereof, that may lead to personal injury and/or health damage.

A hazard is made up of three elements: the potential hazard, the conditions under which it exists, and the trigger. Hazards in industrial production processes are generally divided into seven categories:

No, Hazard Definition: A root cause or condition that could cause injury or illness, property damage, damage to the work environment, or a combination of these conditions.

However, the 110kV substation is a regional substation, and once there is a failure or accident, it will have a significant impact on regional electricity users and the entire power grid, and is a key sector.

In addition to external fires, there are two causes of oil-immersed transformers: external and internal. The external cause is mainly that the shell is covered and there are flammable materials next to it, which causes poor heat dissipation of the transformer, and eventually heat accumulation causes fire.

The internal cause is mainly caused by short-circuit fault, which is divided into external short-circuit and internal short-circuit, when short-circuited, the transformer oil temperature rises sharply, the gas relay bursts, and the high-temperature transformer oil overflows to cause fire. It is more common for a short circuit to cause a fire and a short circuit inside the transformer.

For dry-type transformers, the fire is mainly caused by dirt or objects covering the shell, resulting in poor heat dissipation, which is generally rare. It may also be overloaded for a long time, and the protection is not acted in time, causing overheating and causing fire.