With the development of the security industry, the use of electrical fire monitoring systems has become more and more extensive, not only limited to applications in the production and industrial fields, but also more and more widely used in some public places, commercial centers, etc. So do you know the electrical fire monitoring system? What kind of system is an electrical fire monitoring system?
First, let’s talk about the causes of electrical fires:
1. Leakage fire, mechanical damage, insulation aging cause circuit leakage, leakage leads to local high temperature, arc or sparks lead to electrical fires.
2. Overload fire, when the current passing through the wire exceeds the safe current carrying capacity, the temperature of the wire continues to rise, and the calorific value exceeds the allowable limit, which will accelerate the aging of the insulation, and will cause the insulation layer to burn and cause a fire.
3. Poor contact causes fire. The connection between wires and wires, wires and electrical equipment is not handled well due to the poor contact surface, loose joints, poor contact, local high resistance, and heat generated under the action of current, which may cause electrical damage. The insulation layer of the line, nearby combustible substances and accumulated combustible dust catch fire.
4. Short-circuit fire, the phase line and the phase line, the phase line and the neutral line (or ground line) collide or connect at a certain point due to insulation damage and other reasons, causing the current in the electrical circuit to suddenly increase, which greatly exceeds the normal line. The calorific value during operation, and it is easy to generate strong sparks and arcs at the short-circuit point, causing the nearby flammable and combustible materials to burn and cause a fire.
The fire safety of a building largely depends on the quality of fire fighting equipment, and whether the fire fighting equipment can work normally depends on the working state of the power supply. So what is the difference between an electrical fire monitoring system and a fire equipment power monitoring system?
1. Electrical fire monitoring system
The electrical fire monitoring system is to detect changes in electrical fire risk parameters such as residual current, temperature, and fault arc in the protected line, as well as changes in smoke caused by electrical faults and changes in static electricity and insulation parameters that may cause electrical fires. When the detected parameter in the protected electrical circuit exceeds the alarm setting value, it can send out an alarm signal, a control signal and indicate the alarm position. Therefore, when the design of the whole system is scientific and reasonable, and the products of the related equipment used in the system are reliable, the electrical fire monitoring system can effectively prevent and reduce fire accidents.
2. Fire power monitoring system
The fire-fighting power monitoring system refers to the real-time monitoring of the power supply of the fire-fighting equipment, and collects the voltage, current, switch status and other relevant equipment power information of the fire-fighting equipment on site through sensors, so as to determine whether the power supply equipment has open circuit, short circuit, overvoltage or undervoltage. , phase loss, phase error and overcurrent (overload) and other fault information, and then transmitted to the fire equipment power supply status monitor to monitor the working status of the main power supply and backup power supply of all fire fighting equipment. When there is a lack of phase failure, an alarm signal can be sent to ensure that the power supply of each fire-fighting equipment in the fire-fighting system is normal, thereby ensuring the stable operation of the fire-fighting system.
The harm caused by fire is very serious. In order to make the safety higher, the electrical fire monitoring system has become a content that must be considered. Which buildings need to install an electrical fire monitoring system?
1. Class B and Class C workshops and Class C warehouses with a building height greater than 50m, and workshops (warehouses) with an outdoor fire water consumption greater than 30L/S.
2. Class I high-rise civil buildings: refer to residential buildings with a building height greater than 54m (including residential buildings with commercial service outlets).
3. Class I public buildings: including public buildings with a building height of more than 50m; parts with a building height of more than 24m and a floor area of more than 1,000 square meters for shops, exhibitions, telecommunications, postal services, provincial (city) level and above radio and television , telecommunications, finance, trade and financial buildings, and other buildings with a combination of functions; medical buildings, important public buildings, independently built elderly care facilities; provincial and above radio and television and disaster prevention command and dispatch buildings, network bureau-level and provincial-level buildings Power dispatch building; library and library with over 1 million volumes. Cinemas and theaters with more than 1,500 seats, gymnasiums with more than 3,000 seats, and other public buildings with outdoor fire water consumption greater than 25L/s.
4. The key brick-wood or wood-structured ancient buildings of national cultural relics protection units.
Fire prevention has always been an important part of protecting public safety, and has been highly valued by the masses and the government. The China Safety Technology Prevention Industry Association believes that with the rapid development of technology today, it is inevitable for the electrical fire monitoring system to become more intelligent. Electrical fire monitoring The functions of the system will become more and more perfect, and the fire occurrence rate of leakage in related applications can also be greatly reduced.
Responsible editor: gt