Ankerui overview of fire equipment power monitoring system design

According to the requirements of GB 50116-2013 "Fire Automatic Alarm System Design Specification", through the analysis of the status quo of fire protection equipment management, the necessity of setting up the power supply monitoring system of fire protection equipment is introduced, and the functional requirements of the power supply monitoring system of fire protection equipment and the basic structure of the system are introduced. And the type of monitoring module, propose the selection and design method of the system.
Yang Junjun

Ankerui Electric Co., Ltd. Shanghai Jiading 201801




0 Preface

The automatic fire alarm system and fire extinguishing system installed in modern buildings are increasingly perfect, and the degree of automation is getting higher and higher. However, cases of various types of fire-fighting equipment failing to operate normally occur frequently after fires, and fire departments in various places find investment in daily fire inspections. Fire-fighting equipment with a large amount of funds is more common. Numerous experiences and lessons have proved that whether fire-fighting equipment can function is one of the important conditions for the timely and accurate fire alarm and the success of initial fire fighting. The stable and reliable fire-fighting equipment power supply is the fundamental guarantee for the normal operation of fire-fighting equipment. Therefore, the GB 50116-2013 "Fire Automatic Alarm System Design Specification", which was implemented on May 1, 2014, has increased the setting requirements for the fire protection equipment power monitoring system. This article focuses on the necessity and design method of the fire equipment power monitoring system.

1 The necessity of setting up the fire protection equipment power monitoring system

In order to prevent and reduce the fire hazard, modern fire alarm system, fire emergency broadcast system, automatic sprinkler system, fire hydrant system, smoke control system, fire emergency lighting system, fire elevator system, fire door and roller blind system are installed in modern buildings. , fire door monitoring system, electrical fire monitoring system and other systems, these fire protection systems play an extremely important role in building fire safety. Whether these systems can work normally depends on the working condition of the fire-fighting equipment power supply. If there is no reliable and stable fire-fighting equipment power supply, even if the most advanced fire-fighting system is installed, the terminal fire-extinguishing facilities will be perfected. Once a fire alarm occurs, the entire fire-fighting system will not operate normally. It is impossible to effectively warn and extinguish the fire, and the consequences will be disastrous. Therefore, the fire equipment power supply is the basis of all types of fire protection systems, and reliable and stable fire equipment power supply is essential for the fire system to function effectively.

The characteristics of the fire equipment power supply is that the probability of use is very low, and it is idle for a long time. Once it is used, it should always be in a "fighting" state. In order to ensure the reliability of the fire equipment, the management and daily inspection of the fire equipment power supply is particularly important. . However, due to the particularity of the power supply of fire-fighting equipment, people often have troubles in the daily inspection of the power supply of fire-fighting equipment because of the long-term non-use. It is basically impossible to ensure that the power supply of the fire-fighting equipment is in good condition by relying on human measures. When a fire occurs, the fire-fighting equipment The reliability of power supply cannot be effectively guaranteed. Therefore, in addition to strengthening management, it is necessary to take technical measures to find and solve problems as soon as possible.

How to realize the real-time monitoring of the power supply of fire-fighting equipment from the technical defense means has been highly valued by the public security fire department. After profoundly drawing lessons from fire accidents, in order to effectively strengthen the management of the fire control room, the Fire Department of the Ministry of Public Security organized the national standard GB 25506-2010 "General Technical Requirements for Fire Control Room", which was implemented on July 1, 2011. Among them, the “Fire Power Monitor should be able to display the working status of the power supply and standby power of the fire-fighting equipment and the under-voltage alarm information”, and correspondingly, the fire-fighting equipment should be set in the fire control room. Power monitoring system. The system plays an important role in ensuring the integrity of the building fire protection facilities, improving the fire safety management level of each unit and timely detecting fire equipment failures to prevent and reduce fire hazards. The national standard GB 28184-2011 "Fire Equipment Power Monitoring System" was implemented on August 1, 2012. This standard mandates the basic functions, test and inspection rules of the fire equipment power monitoring system. The provisions of Section 3.4.2 of GB 50116-2013 "Code for Design of Automatic Fire Alarm System" implemented on May 1, 2014 also add provisions for setting up the power monitoring system for fire-fighting equipment.

2 The composition of the fire protection equipment power monitoring system

GB 28184-2011 "Fire-fighting equipment power monitoring system" Article 3.1 gives the definition of fire-fighting equipment power supply: "Fire-fighting equipment power supply for all types of fire-fighting equipment AC or DC power, including main power and backup power"; Article 3.2 The requirements for the fire equipment power monitoring system are: "Fire equipment power monitoring system is used to monitor the working condition of the fire equipment, and the monitoring system can send out alarm signals when the power supply has overvoltage, undervoltage, overcurrent, and lack of equal faults."

Fire equipment power monitoring system is an intelligent product integrating industrial computer technology, communication, anti-electromagnetic interference and digital sensing technology. The system consists of fire equipment power status monitoring host, monitoring module, voltage sensor, current sensor, voltage / current sensor. Part or all of the equipment. The high-sensitivity multi-signal sensor is used to perform 24h real-time automatic inspection on the monitored fire equipment power supply. monitor. By monitoring whether the fire equipment power supply has interrupted power supply, over voltage, under voltage, over current, and lack of equal faults, and sound and light alarm and record. The working status of the fire-fighting equipment power supply is displayed centrally on the fire-fighting equipment power status monitoring host in the fire control room. After the fault alarm, it can be processed in time to eliminate the hidden troubles and make the fire-fighting equipment power supply always in a normal state, thus effectively avoiding fires. The fire equipment cannot work normally due to power failure, and the reliable operation of the fire equipment is guaranteed to the utmost extent.

According to the national standard GB 28184-2011 "Fire Equipment Power Monitoring System" requirements, for the characteristics of various types of fire equipment power supply, fire companies throughout the country actively research and development, successfully developed a variety of fire equipment power monitoring system host and monitoring module. Ankerui developed the AFPM100 fire equipment power monitoring system in response to the mainstream requirements of the times, and achieved considerable results.



2.1 system basic structure

The basic structure of the system is generally a two-layer structure of the monitoring host + monitoring module, and the system architecture is simple. The entire monitoring system has comprehensive functions. Each monitoring module has an independent address code. The system internally uses RS485 network communication to provide external communication to meet the requirements of accessing other fire protection systems. The structure of the fire protection equipment power monitoring system is shown in Figure 1.

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Figure 1 Schematic diagram of AFPM100 fire equipment power monitoring system

2.2 Fire equipment power monitoring module classification

Fire equipment power monitoring module is divided into DC, AC, single-phase, three-phase, one-way power, two-way power supply, etc. according to different monitoring objects, see Table 1.

Table 1 Classification of fire equipment power monitoring module
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Some products can only monitor one power supply per monitoring module. Some monitoring modules can monitor two power supplies at the same time. Figure 2 is a circuit diagram of multi-function fire power monitoring module, which can monitor two AC power supply voltages and currents.

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Figure 2 is a circuit diagram of the multi-function fire power monitoring module

The application example of the fire equipment power monitoring module in the building electrical construction drawing is shown in Figure 3.

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Figure 3 Distribution system diagram (with fire equipment power monitoring module)

2.3 Fire equipment power monitoring system function

2.3.1 Fault alarm

● The connection between the monitor and the module (voltage/current signal input and output sensor) is open and shorted;

● Monitor mains undervoltage (≤80% mains voltage) or overvoltage (≥110% mains voltage);

● The connection between the monitor and its remote power supply is open and shorted;

● When the above fault occurs in the monitor, it can issue an acousto-optic fault alarm signal that is significantly different from the monitoring alarm signal;

● Fault alarm response time: ≤100s;

● Fault alarm sound signal: manual elimination, when there is an alarm signal input again, it can be started again;

● Fault alarm light signal: The yellow LED indicator is always on;

● The normal operation of the non-faulty loop is not affected during the fault

2.3.2 Fire equipment power failure alarm

● The power circuit switch status of the monitored equipment;

● The working state (voltage, current and switch status information) of the monitored device power supply;

● Alarm response time: ≤30s;

● Alarm sound signal: It can be manually eliminated. When there is an alarm signal input again, it can be started again;

● Alarm light signal: The red LED indicator is always on.

2.3.3 Control output

● Remote remote operation of alarm relays of individual or all monitored equipment;

● Monitor control output: normally open passive contact, capacity: AC250V 3A or DC30V 3A.

2.3.4 Alarm Record

● Record 999 related fault alarm information;

● Alarm type: fault type, time of occurrence, fault description;

● Alarm event query;

● Alarm record printing.

2.3.5 Monitoring Host Functions

● The main power supply is AC 220V, 50Hz;

● The battery is used as the backup power source, and the capacity of the main power to charge the standby power for 24h satisfies the working timeout of the entire system for 8 hours;

● The working power of the monitoring module must be powered by the monitoring host. The mains supply cannot be taken directly. The monitoring host supplies DC 24V to all connected monitoring modules.

● RS485 interface is adopted for external communication.

3 Monitoring system host and monitoring module installation location

3.1 Monitoring system host installation location

Wall-mounted installation of small system mainframes should be set up in the fire control room. Small buildings without fire control room should be installed. The monitoring system should be set up in a place where people are on duty. The large system can be desktop or cabinet type, and the monitoring system host and graphic display device should be installed in the fire control room.

3.2 Monitoring module installation location

The monitoring module is installed in the special box near the power supply of the monitored fire-fighting equipment, and can also be installed in the power supply box of the monitored fire-fighting equipment; the monitoring module should be set at the end, and the voltage sensor and current sensor of the system should be set to ensure the entire fire-fighting system. The working status of the power supply can be displayed in real time in the monitoring module or the fire control room.

4 Form selection and design requirements for fire protection equipment power monitoring system

The fire equipment power monitoring system is a relatively independent monitoring system, and its system architecture is similar to the automatic fire alarm system. Small buildings can use the monitoring host system, as shown in Figure 4;

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Figure 4 Network topology diagram of small and medium-sized monitoring system

A large building or group of buildings can use a centralized monitoring host plus multiple regional monitoring host systems, as shown in Figure 5.

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Figure 5 Network topology diagram of a large monitoring system

The transmission distance between the host and the monitoring module is greater than the product requirement. The repeater needs to add one monitoring module address. The relay AC 220V power supply is provided by the on-site fire power supply or the fire monitoring room monitoring host. Each repeater can carry 32. Monitoring modules. Monitor the host power " target=_blank> The machine power supply is AC 220V, the backup power supply can be brought by itself or provided on site. The design should pay attention to the monitoring module working power supply must be powered by the monitoring host or repeater, can not directly take the mains, monitoring The host or repeater powers all connected monitoring modules (DC 24V).

5 Conclusion

The specification standards such as “Fire Automatic Alarm System Design Specification” and “Fire Equipment Power Monitoring System” provide technical specifications for the design unit to design the fire protection equipment power monitoring system.

Whether the fire-fighting equipment can work normally depends on whether the working state of the fire-fighting equipment power supply is stable and good. In order to ensure that the fire power supply in the building is continuously powered at any time and under any circumstances, it is necessary to eliminate the fire safety hazard and ensure fire safety. It is necessary to set up the fire protection equipment power monitoring system. The fire-fighting equipment power monitoring system can be set up to implement scientific management of the fire safety of the entire building, so that the fire-fighting equipment can achieve the "prevention-oriented, anti-disintegration" in the true sense.

references

[1] GB 50116-2013 Fire automatic alarm system design specification [S]

[2] GB 28184-2011 Fire equipment power monitoring system [S]

[3] GB 25506-2010 General technical requirements for fire control room [S]

[4] Ankerui Electric Co., Ltd. Product Selection Manual 2013.11 Edition.

[5] Ankerui fire equipment power monitoring system design and application atlas 2014.5 version.

About the Author:

Yang Junjun, female, undergraduate, Ankerui Electric Co., Ltd., the main research direction is electrical safety. Contact phone, mobile phone, QQ
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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