Zhang Shiquan Xu Haiyan Ankerui Electric Co., Ltd., Jiading, Shanghai 201801 Abstract : This paper introduces the characteristics of the fire hazardous environment in the petrochemical industry and clarifies the necessity and function of the fire protection equipment power monitoring system and the electrical fire monitoring system in the petrochemical industry power supply and distribution system. Keywords: fire hazard environment; electrical safety; electrical fire monitoring system; fire equipment power monitoring There are already tens of thousands of petrochemical companies registered in the country. The development of the national economy, the improvement of the quality of life of the people, and the progress of national construction cannot be separated from the contributions of the petrochemical industry. However, there are also many hidden safety hazards in itself. The petrochemical industry has a complex production process. In the process of excavation, processing, processing, transportation and storage, fire hazardous substances are unavoidable, and their process equipment and production lines are also affected. Sparks are generated by static electricity, and the air mixture and hazardous substances that can easily cause explosions are exposed to high temperatures and static electricity. This can cause fires and explosions. Based on the above environmental conditions, the petrochemical industry is an environment prone to electrical fires and has higher requirements in electrical safety than other industries. The interpretation of the load required for special power supply is: when the normal working power source is interrupted by itself or is cut off artificially, the production is stopped to ensure the safe and reliable operation of the enterprise, so as to prevent further explosion of the electrical explosion or fire on the spot, poisoning of personnel and personnel. Casualties and other accidents prevent the expansion of accidents. In order to rescue and evacuate personnel, it is necessary to ensure normal power supply. The load of special power supply for petrochemical enterprises is: communication system, on-site fire alarm equipment, necessary accident lighting, and electricity load in fire protection system. Our company puts forward two solutions for chemical fire prevention technical measures in chemical companies: 1Set up an electrical fire monitoring system; 2Enhance the monitoring of fire power load. 1, set up the electrical fire monitoring system Acrel-6000 electrical fire monitoring system is a product independently developed by our company and complies with national standards ("Electrical fire monitoring system part 1: electrical fire monitoring equipment"). Its main components are ARCM electrical fire monitoring detectors, spacers, Computer monitoring system in three parts. The main function of the system is to detect changes in the dangerous parameters that may cause fire, such as residual current and temperature, in the protected circuit in real time. When the detected parameter in the protection circuit exceeds the preset alarm value, the system can send an alarm signal, control signal and indicate Line alarms allow managers to effectively control the factors that cause electrical fires. 1.1 System Structure The overall architecture of the system adopts a hierarchical distributed structure and is mainly composed of the station control management layer, bay layer and field device layer. • ARCM100-Z surveillance detector ARCM series monitor detector can measure three-phase current, voltage, power, power factor; measure four-quadrant electric energy, fundamental wave electric energy, apparent electric energy; single circuit residual current measurement and temperature monitoring; with multiple relay output, support fire The linkage function uses RS485 communication interface. Applicable to 0.4kV TN-CS, TN-S and local TT systems. 1.2 System Functions Acrel-6000 monitoring system mainly has the following six functions: monitoring alarm, fault alarm, control output, self-check, alarm recording and operation classification. The PC software Acrel-6000 electrical fire system mainly has the following features: a friendly man-machine interface, real-time and regular collection of the residual current data and temperature of the field device, and alarm sound and light alarm functions. The alarm temperature value and leakage current value can be set according to actual needs. When the alarm fault is removed, the remote can be reset. The system can record alarm events, dates, alarm values, and over-line values, generate reports, and print them. The system provides multi-level management rights measures, assigning different levels of authority to different levels of users, thus ensuring the security and reliability of the system during operation. 1) Field data collection and alarm On-site ARCM series monitoring detectors upload real-time data collected on site through the monitoring system to the system interface as shown in the figure. When the detector detects that the residual current value of the corresponding circuit is greater than the preset alarm value, the color of the corresponding alarm unit state in the interface changes, which helps to remind the on-site personnel to process and judge the alarm information. 2) Fault display Dynamic simulation of the main wiring diagram shows the leakage status of each circuit and the state of separation. Acoustic and optical alarms are implemented on site or in the control room. The interface automatically jumps out of the alarm message window of the leakage alarm and indicates the specific location or loop of the leakage alarm. 3) Fault and alarm records The monitoring software automatically generates event records (including time, address, alarm type, etc.) and is stored on the hard disk of the monitoring host to facilitate the query of the operating personnel. 2. Strengthen the monitoring of fire power supply load Fire safety largely depends on the quality of fire-fighting equipment. Second, whether the fire-fighting equipment works properly or not depends on the working status of the power supply equipment. If there is no reliable fire-fighting equipment power supply, the fire-fighting equipment will be virtually used at the crucial moment, so ensure the fire-fighting equipment. The normal work can play a positive role in the evacuation and rescue of people in the event of a fire. The AFPM series fire-fighting equipment power monitoring system is based on the national standard "Fire-fighting equipment power monitoring system", and the fire-fighting equipment power monitoring system monitoring host is installed in the fire-fighting control room, capable of real-time monitoring of the fire-fighting equipment power supply, and detecting the voltage of the fire-fighting equipment power supply. Current, switching status and other related equipment power supply information to determine whether the power supply equipment has fault information such as open circuit, short circuit, overvoltage, undervoltage, phase loss, phase error, and overcurrent (overload) and alarm and record monitoring system. This system has the characteristics of reliability, real-time, digitization, intelligence, networking, and continuous monitoring. The status of the power of the monitored equipment is reflected in real time and displayed collectively. Fire-fighting electrical equipment in petrochemical enterprises includes: fire-fighting pumps, emergency lighting and evacuation indicators, fire alarm systems and linkage control systems, fire-fighting electric valves and other fire-fighting equipment. The system consists of AFPM100 monitoring detectors, repeaters, AFPM series power monitoring modules and transmission cables. The monitoring host adopts a centralized and modular design, and is equipped with a monitoring module to track, store, and analyze the monitored fire equipment power supply operating information, fault information, location information, etc., to facilitate the user's management and monitoring; The machine interaction interface integrates the data of the fire-fighting equipment power supply and has functions such as management, viewing, alarm, and printing. The maximum communication distance of the network generally does not exceed 500m. 2.1 AFPM100 monitoring detector Adopt 24-hour working system, Modbus-RTU communication protocol, RS485 half duplex bus mode, transmission distance 1km (can extend the communication transmission distance through the repeater). And in order to enhance the reliability of the power supply, when the main power supply (AC220V 50Hz (allows changes in the range of 85%~110%)) to be low voltage or power failure, the power supply for the additional equipment can maintain the working time of the monitoring equipment ≥ 8h. The detector can provide DC24V power to the connected module (voltage/current signal sensor) at the same time. Its characteristics are as follows: * Monitoring capacity: ≤128 points * Display mode: 320*240 lattice liquid crystal * Input and output modules: Built-in remote I/O modules * Sound and light alarm module: built-in speaker, buzzer, LED indicator 2.2 Power Monitoring Module The monitoring module is used to monitor and collect information on the power supply and equipment operating status of various fire-fighting equipments in real-time. It has over-voltage, under-voltage, over-current (only with current detection products), phase loss (three-phase module), Phase-inverted (three-phase module) alarm and event storage function. The alarm can record the time, type and parameter of the alarm. According to the alarm record, the situation on the site can be analyzed to provide the basis for eliminating the fault. Through the RS485 interface, the standard Modbus protocol can Connected to various standard systems, it has the advantages of high integration, networking, high intelligence, and reasonable operating characteristics. In practical applications, different monitoring modules with different functions can be selected according to the actual application requirements of the site. The monitoring module is divided into three categories: AFPM1 represents a single-phase power monitoring module that monitors the AC/DC voltage and current of the power supply; AFPM3 represents three-phase power monitoring module for monitoring AC/DC voltage and current of the power supply; The AFPM5 opens and exits the monitoring module, which monitors the switch status and can be connected to the alarm control circuit. The module adopts a standard modular design with rail mounting to facilitate field use. The use of high-performance single-chip embedded data acquisition and communication program to achieve reliable data acquisition and transmission. Sensing monitoring modules are installed in each area according to the nature and purpose of the fire fighting equipment and are responsible for monitoring the power supply information of the fire fighting equipment in the corresponding area. RS485 private communication network connection is used between monitoring modules. 2.3 Repeaters. The repeater is suitable for monitoring the distance between the host and the on-site monitoring module. When the transmission distance exceeds 500 meters, the repeater is used to expand, and each repeater can manage 32 monitoring modules. The repeater can not only increase the communication distance of the system, but also can supply power to the connected on-site monitoring module to solve the attenuation of communication signals and power output due to the long distance. The repeater transmits the power information of the connected site monitoring module and repeater to the monitoring host through the communication bus. This article addresses the special needs of electric safety in the petrochemical industry and describes the power monitoring and electrical fire monitoring products of Ankerui Electric Co., Ltd. with its strong R&D strength and high-quality pre-sale and post-sale services for petrochemical enterprises. And solutions to meet the requirements of building electrical fire prevention and early warning, to achieve the purpose of containing electrical fires, and to protect the electrical safety of petrochemical enterprises. 3, company profile Ankerui Electric Co., Ltd. [Stock Code: 300286.SZ] is one of the few leading companies in China that provides system solutions such as smart power monitoring, power management, and electrical safety for smart grid customers. Since its establishment in June 2003, the company has focused on the R&D, production and sales of customer-side smart power meters. The product line covers the low-voltage power signal acquisition, measurement, measurement, monitoring, protection and system integration of smart grid subscribers. Power meters, intelligent motor controllers, rail-mounted energy meters, power sensors, photovoltaic combiner boxes, active filters, medical clean power cabinets and other products as well as intelligent power monitoring and power management, building energy analysis management, electrical fire monitoring, Data center electricity monitoring, photovoltaic power plant monitoring, ZigBee (Internet of Things) radio energy management and other system solutions. The company owns a Jiading district-level technology center and is a high-tech enterprise and a software company. He successively participated in GB/T22264-2008 "Installed Digital Electric Measuring Instrument", JB/T10736-2007 "Low Voltage Motor Protector", GB/T15576-2008 "Low Voltage Complete Reactive Power Compensation Device", GB/T22387-2008 "The Residual Current "Action relay" and many other electric power meter national standard and line standard drafting or preparation. As of December 2011, the company has more than 100 authorized patents and more than 70 computer software copyrights; ACR network power meters are listed as national key new products, and the company is listed as one of the key enterprises of the smart grid by the Shanghai Economic and Trade Commission. In 2007, the company's production base in Jiangyin, Jiangsu was completed and put into production. The first-phase factory building area was 10,000 square meters. It was the first company in the smart power meter industry to adopt the lead-free SMT production technology and provided the industrialization and scale implementation of the company's products. Protection. In March 2010, the company's technical transformation, the workshop to carry out anti-static transformation, so that the production environment to further enhance, at the same time, the introduction of MES management system in production, each process bar code scanning, so that the entire production schedule and process have been controlled . Basically achieved paperless management, saving production costs and improving management efficiency. Ankerui Trademarks and Products have been rated as Shanghai Famous Trademarks and Brand Named Products. The products are widely used in the Shanghai World Expo Project, the Guangzhou Asian Games Project, the National Stadium of Costa Rica, Beijing-Tianjin High-speed Rail Power Monitoring, Dunhuang 10MW Photovoltaic Demonstration Power Station, China Bank of Pudong Data Center, India 500,000 tons of coking and other major projects at home and abroad, won a good reputation in the market. references: [1] HG/T20664-1999 "Technical Provisions for Power Supply Design of Chemical Enterprises". [2] Ankerui Electric Co., Ltd. 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