Xu Shuang
Ankerui Electric Co., Ltd. Jiading, Shanghai 201801, China
Abstract: This paper briefly describes the composition principle of fire equipment power supply, and analyzes the design basis and related specifications of fire equipment power monitoring system in application. Finally, through the introduction of the Ankerui fire equipment power monitoring system in Wuxi Weifu 701 workshop project, the realization of the power function of the fire fighting equipment and its significance are expounded.
Keywords: fire equipment power supply; power monitoring module; monitoring system; AFPM100; Wuxi Weifu 701 workshop
0 Overview
   AFPM fire equipment power monitoring system is a computer monitoring and control system independently developed by Ankerui. It can be widely used in intelligent buildings, high-rise apartments, hotels, restaurants, commercial buildings, industrial and mining enterprises, national key fire protection. Units and petrochemical, cultural and educational health, finance, telecommunications and other fields.
   AFPM100 fire equipment power status monitor is the core of AFPM fire equipment power monitoring system. AFPM100 monitor is connected with multiple sensors through RS485 bus to form a distributed fire equipment power monitoring system to monitor the working status of fire equipment main and standby power in real time. The monitor adopts centralized and modular design, and is equipped with sensors to monitor the voltage, current, switch status and other operational related information, alarm information, fault information, etc. of the fire equipment power supply, and store, analyze and statistically facilitate the user to monitor and Management; through the human-computer interaction interface, the fire equipment power supply data is summarized and displayed, with functions of management, viewing, alarm, and printing.
   The project is located in Weifu 701 workshop in Wuxi. A total of 31 AFPM3-2AV fire power monitoring modules are distributed on site, which are installed in the fire and power distribution box of the strong electric well in the floor. The on-site fire power monitoring module is connected to the AFPM100 wall-mounted fire power monitoring system of the control center by bus. The device has reasonable structure, high reliability, strong function, convenient maintenance, high cost performance, friendly system interface, easy to learn and use.
1 User requirements
   This project requires the fire equipment power monitoring system to monitor the faults and abnormal conditions of the power supply of the fire equipment of Wuxi Weifu 701 workshop, and promptly alarm to remind relevant personnel to eliminate these hidden dangers and prevent fire-fighting equipment from being available when the fire occurs. Not working properly.
   To facilitate on-duty monitoring and management, the central host has the following main functions:
   1) According to the power distribution drawings, monitor the fire equipment of each circuit and master the operation of the power supply of the fire equipment.
   2) Fire equipment power monitoring system can realize a unified monitoring platform, which can obtain real-time data of all parameters in the system; intelligent management of the entire fire equipment power monitoring system can detect relevant information such as the voltage status of the fire equipment power supply. Therefore, it is judged whether the power supply of the fire-fighting equipment has fault information such as open circuit, short circuit, over voltage, under voltage, phase loss and error.
   3) The host should monitor the alarm and fault alarm events with real-time printing of event number, monitoring location, event nature, alarm parameters and date and time data. The alarm event data should be stored separately, with an independent query interface, and can not be modified for fault liability analysis.
   4) In addition to the above provisions, other functions and performance of the mainframe shall comply with the national standard GB 28184-2011 "Fire Equipment Power Monitoring System" and GB 25506-2010 "Fire Control Room General Technical Requirements" standard.
2 reference standard
2.1. GB25506-2010 "General technical requirements for fire control room", in the provisions of 5.7 fire power monitors should meet the following requirements:
   a) It should be able to display the working status and fault alarm information of the power supply and backup power of the fire-fighting equipment.
   b) It shall be able to transmit the working status and undervoltage alarm information of the power supply and backup power of the fire-fighting equipment to the graphic display device of the fire control room.
2.2. GB 28184-2011 "Fire Equipment Power Monitoring System"
2.3. GB 50116-2013 "Fire Automatic Alarm System Design Specification"
3 system components
   Wuxi Weifu 701 workshop fire equipment power monitoring system project consists of fire equipment power monitoring host, fire equipment power detector.
The communication bus of this project is connected to two communication buses, and the detector module is directly connected to the wall-mounted mainframe to form the aorta of the fire-fighting equipment power monitoring system. The AFPM100 fire equipment power monitoring system adopts a two-layer structure networking mode of the fire equipment power status monitor + voltage sensor. The whole monitoring system is comprehensive in function, safe and reliable, accurate in detection and cost-effective. The system uses RS485 network communication internally and provides Modbus-RTU communication protocol to meet the connection of other standard systems. The above-mentioned set of signals is stable and accurate. Fire equipment power monitoring system. The system networking is divided into three layers:
1) Station management
   The management personnel of the station control management system for the fire power monitoring system is the direct window of human-computer interaction and the uppermost part of the system. Mainly composed of system software and necessary hardware equipment, such as touch screen, UPS power supply and so on. The monitoring system software calculates, analyzes, and processes various types of data information on the site, and responds to the on-site transportation situation by means of graphics, digital display, sound, and indicator lights.
Monitoring host: used for data collection, processing, and data forwarding. Provides data interfaces for system management, maintenance, and analysis within and outside the system.
UPS: Ensure the normal power supply of the computer monitoring system, and ensure the normal operation of the station management management equipment when the whole system has power supply problems.
The monitoring host is set in the control room and is installed by wall mounting.
2) Network communication layer <br>Communication medium: The system mainly adopts shielded twisted pair cable, realizes real-time communication between field device and host computer by RS485 interface and MODBUS communication protocol.
3) Field device layer
   The field device layer is a data acquisition terminal, mainly for the AFPM100 series fire equipment power monitoring detector.
   The system structure topology is as follows:
4 Fire equipment power equipment
4.1, AFPM100 fire equipment power supply host
The main technical parameters:
    Main power supply: AC220V 50Hz (allows 85%-110% variation)
    Backup power supply: When the main power supply is low voltage or power failure, maintain the monitoring equipment working time ≥8h
    The monitor provides DC24V power to the connected modules (voltage/current signal sensors)
    Work system: 24-hour work system
communication method:
    Modbus-RTU communication protocol, RS485 half-duplex bus mode, transmission distance of 500m (if it exceeds the transmission distance through the repeater).
Operational rating
    1 Daily duty class: real-time status monitoring, history query.
    2 Monitoring operation level: real-time status monitoring, history query, remote reset of detector.
    3 System management level: real-time status monitoring, history query, remote reset of detectors, remote modification of detector parameters, system parameter setting and modification of monitoring equipment, operator addition and deletion.
Environmental conditions
    1 Workplace: Fire control room, or installed side by side with fire control console
    2 Working environment temperature: -10 ° C ~ +55 ° C
    3 Working environment relative humidity: ≤95% no condensation
    4 Altitude: ≤2500m
    5 Pollution degree: Class III, installation category: Level III
4.2, AFPM100 series instruments
4.2.1. Real-time monitoring of two three-phase voltages;
4.2.2, with overvoltage, undervoltage, phase loss, phase error, overcurrent (only with current detection products) alarm;
4.2.3, provide one or two channels (only monitor two-way three-phase AC voltage products) switch input function, can monitor the switch state; (see module selection for details)
4.2.4. Provide one relay output, which can be connected to the alarm control loop;
4.2.5. With event storage function, the alarm can record the time, type and parameter of the alarm occurrence. According to the alarm record, the situation can be analyzed to provide a basis for eliminating the fault;
4.2.6. Using fieldbus communication technology, the host computer management software can monitor the operation of the site at all times and timely discover the alarm information. The standard MODBUS protocol can be connected to various standard systems via the RS485 interface;
4.2.7, high integration, network, high degree of intelligence, reasonable operating characteristics
5 system function
5.1, monitoring alarm function
    Monitored device power loop switch status
    Working status of the monitored equipment power supply (voltage, current and alarm status information)
    Alarm response time: ≤100s
    Alarm sound signal: can be manually eliminated, can be started again when there is an alarm signal input again
    Alarm light signal: red LED indicator is always on
5.2, control output function
    Remote remote operation of alarm relays for individual or all monitored equipment
    Monitor control output: normally open passive contact, capacity: AC250V 3A or DC30V 3A
5.3, fault alarm function
    The connection between the monitor and the module (voltage/current signal sensor) is open and shorted
    Monitor mains undervoltage (≤80% mains voltage) or overvoltage (≥110% mains voltage)
    The connection between the monitor and its separate power supply is open and shorted.
    When the above fault occurs in the monitor, it can emit an acousto-optic fault alarm signal that is clearly different from the monitoring alarm signal.
    Fault alarm response time: ≤100s
    Fault alarm sound signal: manual elimination, can be started again when there is alarm signal input again
    Fault alarm light signal: yellow LED indicator is always on
    The normal operation of the non-faulty loop is not affected during the fault
5.4, ​​self-test function
    Connection check: open and short circuit of communication line and split power line
    Equipment self-test: manual inspection or system self-test
    Self-test time: ≤60s
5.5, alarm record function
    Record 10000 related fault alarm information
    Alarm type: fault type, time of occurrence, fault description
    Alarm event query
    Alarm record printing
5.6, printing function     The monitoring system can print Chinese characters and print alarm events and time, fault events and time.
5.7, silence
    In the event of an alarm such as an alarm or a fault, the speaker of the monitoring device will give a corresponding alarm sound to prompt, press the “mute†button to terminate the alarm, and the alarm light will be green. During the period, the staff can handle the faults. Everything returned to normal and the alarm light went out. If a new fault occurs, the silence indicator will turn off and the speaker will sound an alarm again.
6 Conclusion
    Wuxi Weifu 701 workshop fire power monitoring system consists of fire equipment power monitoring device AFPM100, fire equipment power detector. AFPM fire equipment power monitoring system is a computer monitoring and control system independently developed by Ankerui. It can be widely used in intelligent buildings, high-rise apartments, hotels, restaurants, commercial buildings, industrial and mining enterprises, national key fire protection. Units and petrochemical, cultural and educational health, finance, telecommunications and other fields. AFPM100 fire equipment power status monitor is the core of AFPM fire equipment power monitoring system. The monitoring equipment is connected with multiple sensors through RS485 bus to form a distributed fire equipment power monitoring system to monitor the working status of fire equipment power in real time. The controller adopts centralized and modular design, and is equipped with sensors to track, collect, store and analyze the operating parameters, fault information and position information of the monitored fire equipment power supply, which is convenient for users to manage and monitor; The interactive interface displays the data of the fire equipment power supply, and has many functions such as management, viewing, alarm, and printing. The device has reasonable structure, high reliability, strong function, convenient maintenance, high cost performance, and the system interface is intuitive and easy to use.
references:
[1]. Ren Zhicheng Zhou Zhong. Principles and Application Guide of Digital Measurement of Electric Power Measurement [M]. Beijing. China Electric Power Press. 2007. 4
[2]. Zhou Zhong. Application of power meter in electric energy metering of large public buildings [J]. Modern Building Electric 2010. 6
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