Abnt - Nbr 12232 - Protecao Contra Incendio Com Gas Carbonico (co2) Em Transformadores E Reator
Abnt - Nbr 12232 - Protecao Contra Incendio Com Gas Carbonico (co2) Em Transformadores E Reator >> https://urllio.com/2tztLk
Abnt - Nbr 12232: How to Protect Transformers and Reactors from Fire with Carbon Dioxide (CO2)
Transformers and reactors are essential equipment for the transmission and distribution of electric power. However, they are also vulnerable to fire hazards due to their high voltage, current, and temperature. A fire in a transformer or a reactor can cause serious damage to the equipment, the environment, and human lives.
Therefore, it is important to have a reliable and effective fire protection system for these devices. One of the most widely used methods is the use of carbon dioxide (CO2) as an extinguishing agent. CO2 is a colorless, odorless, non-toxic, and non-conductive gas that can quickly smother a fire by reducing the oxygen level in the area.
But how can you apply CO2 to protect transformers and reactors from fire That's where the Brazilian standard Abnt - Nbr 12232 comes in. This standard establishes the requirements and procedures for the design, installation, operation, and maintenance of CO2 fire protection systems for transformers and reactors.
In this article, we will explain the main aspects of Abnt - Nbr 12232 and how it can help you ensure the safety of your transformers and reactors.
What is Abnt - Nbr 12232
Abnt - Nbr 12232 is a technical standard issued by the Brazilian Association of Technical Standards (Abnt), which is the national body responsible for standardization in Brazil. Abnt - Nbr 12232 was first published in 1992 and revised in 2010. It applies to transformers and reactors with oil insulation or cooling, with or without conservator tank, with power rating above 300 kVA.
The standard defines the criteria for selecting the type and quantity of CO2 needed for each equipment, based on its characteristics, location, and configuration. It also specifies the components and accessories of the CO2 system, such as cylinders, valves, pipes, nozzles, detectors, alarms, control panels, etc. Moreover, it provides guidelines for testing, inspecting, and maintaining the system periodically.
The main objective of Abnt - Nbr 12232 is to ensure that the CO2 system can effectively extinguish a fire in a transformer or a reactor within a short time, without causing damage to the equipment or harming the personnel. The standard also aims to prevent false alarms or accidental discharges of CO2 that could compromise the operation of the system or pose a risk to the environment.
What are the benefits of using CO2 for fire protection
CO2 is one of the most widely used extinguishing agents for fire protection because it offers several advantages over other methods. Some of the benefits of using CO2 are:
It is readily available and inexpensive.
It does not leave any residue or corrosion on the equipment after use.
It does not affect the insulation or cooling properties of the oil in transformers and reactors.
It does not require electricity or water to operate.
It can be stored in cylinders or tanks at high pressure and released rapidly when needed.
It can be applied locally or globally to cover the entire equipment or a specific area.
It can be activated manually or automatically by sensors or controllers.
However, CO2 also has some limitations and risks that need to be considered before using it. Some of the drawbacks of using CO2 are:
It can cause asphyxiation if inhaled in high concentrations.
It can cause frostbite if in contact with skin or eyes.
It can create noise and pressure effects that could damage nearby structures or equipment.
It can displace oxygen in enclosed spaces and create an explosive atmosphere if mixed with flammable gases.
Therefore, it is essential to follow the recommendations of Abnt - Nbr 12232 when designing, installing, operating, and maintaining CO2 systems for transformers and reactors. The standard provides safety measures and precautions to avoid accidents and injuries related to CO2 exposure or misuse. 061ffe29dd