Application of fire emergency lighting system in a data center project

Ren Yunye Ankrui Electric Co.
, Ltd.
Shanghai Jiading Introduction Fire emergency lighting and evacuation indication system is a kind of auxiliary personnel safety evacuation and fire emergency operation of the building fire protection system, by fire emergency lighting fixtures, fire emergency sign lamps and related devices, the role is that after the occurrence of fire, the fire emergency lighting and evacuation indication system can be started in accordance with the preset logic, providing the necessary lighting conditions and correct evacuation instructions for
people's safe evacuation and fire extinguishing and rescue operations 。 With the development of data centers, whether domestic or foreign data center application practices, the system is a vital guarantee system for data center fire safety, and effectively improves the fire safety margin of data centers plays an increasingly important role
.
I.
Project Overview A data center has a construction area of 23299.
35 square meters, and the building covers an area of 6533.
35 square meters
.
There are four floors above ground and one underground floor
.
The height of the building is 23.
75 meters
.
Building function: data room
.
Building nature: The grade of the project building is first-class, and it is a multi-storey class C workshop
.
The room is divided into main engine room, auxiliary area, support area and administrative office area
according to its different functions.
2.
The national standard for the design of emergency lighting, "Code for the Design of Data Centers" (GB50174-2017), has the following provisions for emergency lighting: "8.
2.
6 The data center shall be equipped with channel evacuation lighting and evacuation indication lights, the illuminance value of the evacuation lighting of the main engine room passage shall not be lower than 5Lx, and the illuminance value of the evacuation lighting of the passage in other areas shall not be less than 1Lx
.
"The fire emergency lighting and evacuation indication system requires that after the fire causes the non-fire power to be removed, the emergency lighting fixtures can be automatically lit and the personnel can be evacuated in time to reach a safe area
.
(1) According to the "Code for Fire Prevention of Building Design" (GB50016-2014 (2018 version)), the data center is "the main engine room of the electronic information system and its control room, the recording media library, the special valuable or fire hazard machine, instrument, instrument and equipment room, and the valuable goods warehouse", and an automatic fire alarm system
should be installed.
According to the "Code for the Design of Automatic Fire Alarm System" (GB50116-2013), the data center not only needs to alarm, but also needs to link automatic fire fighting equipment, and a fire control room
should be installed.
According to the Technical Standard for Fire Emergency Lighting and Evacuation Indication System (GB51309-2018), "Article 3.
1.
2 requires, the place where the fire control room is set up should choose a centralized control system"
.
Therefore, the data center should choose a centrally controlled fire emergency lighting and evacuation indication system
.
(2) The installation part and lamp selection emergency lighting should use energy-saving light source, the color temperature is not less than 2700K, and the setting of emergency lighting in the data center should ensure that the basic illumination of personnel in the evacuation path and related areas is provided
.
The setting of emergency sign lights should ensure that personnel can clearly identify the evacuation path, evacuation direction, the location of the safety exit, the location of the floor, should be set in a conspicuous position, should ensure that personnel can see the sign lamps
at any position of the evacuation path.
According to the requirements of Article 3.
2.
1 of the Technical Standard for Fire Emergency Lighting and Evacuation Indication System (GB51309-2018), A-type emergency lighting fixtures should be selected when installed in places below 8m; A-type or B-type emergency lighting fixtures
can be selected according to the calculated illumination in places above 8m.
Because the height of the data center is within 8m, all A-type emergency lighting fixtures are selected, and A-type emergency lamps use safety voltage, which plays a huge role
in ensuring the safety of personnel during fire evacuation and the personal safety of firefighters during fire fighting.
A-type lamp selection: (3) power supply mode and control mode The number of emergency lights and sign lights in the data center is large, and it is advisable to use centralized power supply, and the main power supply and battery power supply of the lamp are distributed by the same distribution circuit
after the output conversion is realized inside the centralized power supply.
The number of lamps and lanterns in any distribution circuit should not exceed 60, and the sum of the rated power of any distribution circuit mating lamps should not be greater than 80%
of the rated power of the distribution circuit.
The centralized power supply should be considered according to the power supply distance of the line and the division of the fire zone, and the total power of the lamp is greater than 5KW of the system, and the centralized power supply
should be set up in a decentralized manner.
The centralized power output loop should not exceed 8 channels
.
Type A emergency lighting centralized power supply emergency lighting controller should choose a product that can receive fire alarm controller or fire linkage controller dry contact signal or DC24V signal interface, when using communication protocol to communicate with fire linkage controller, should choose products with the communication interface and communication protocol of fire linkage controller to meet the current national standard "Compatibility Requirements for Fire Automatic Alarm System Components" GB 2213
.
The total number of lamps directly controlled by any emergency lighting controller should not be greater than 3200.

The emergency lighting controller should be set in the fire control room, the main power supply should be powered by the fire power supply, and its own battery power supply should make the controller work for at least 3 hours
after the main power supply is interrupted 。 Host selection on-site networking (4) system function 1) non-fire state (1) when the main power supply of the system is normal: (1) the main power supply should be kept to power the lamp; (2) All non-continuous lighting lamps should remain off, and the light source of continuous lighting fixtures should be kept in power-saving lighting mode; (2) When the main power supply of the system is powered off: (1) All non-continuous lighting lamps should be lit in an emergency, and the light source of continuous lighting fixtures should be transferred from the power-saving lighting mode to the emergency lighting mode; The continuous emergency lighting mode of the lamp should not exceed 0.
5h; (2) After the main power supply of the system is restored, all lamps will automatically return to the working state
when the main power supply of the above system is normal.
(3) When the communication between the emergency lighting controller and the centralized power supply or emergency lighting distribution box is interrupted, and when the communication between the centralized power supply or emergency lighting distribution box and the lamp is interrupted, the non-continuous lamp is turned on in an emergency and continuous lamp from the power-saving lighting mode to the emergency lighting mode
。 2) In the fire state (1) the fire alarm output signal of the fire alarm controller should be used as the trigger signal for the automatic emergency start of the system; (2) After receiving the fire alarm signal, the emergency lighting controller should automatically perform the following control operations: (1) All non-continuous lighting lamps are turned on in an emergency, and the continuous lamps are switched from the power-saving lighting mode to the emergency lighting mode; (2) The centralized power supply should maintain the main power output, and after receiving the main power supply power failure signal, it will automatically transfer to the battery power output
.
3.
Concluding remarks Since the release of the Technical Specification for Fire Emergency Lighting and Evacuation Indication System (GB51309-2018), many novel concepts and ideas have been put forward, and a complete design method and technical measures for emergency lighting and evacuation indication system have been formulated, providing a complete standard system
for the design, construction, acceptance, operation and maintenance of emergency lighting 。 At the same time, it also plays a pivotal role in ensuring data security and personal safety of data center staff, in accordance with the requirements of relevant national laws and regulations, do a good job in the design, construction, acceptance and daily maintenance of emergency lighting systems, ensure the stable operation of the system, escort the long-term security of the data center, Accuray Electric focuses on creating various fire security system products, under the premise of meeting the requirements of national industry standards, to provide intelligent, efficient, energy-saving and cheap fire protection solutions and fire protection products for all kinds of buildings.
Make a contribution to fire prevention and disaster reduction, and ensure the safety of people's lives and property! References[1].
Accuray Electric Co.
, Ltd.
Product Selection Manual.
2018.
01[2].
GB50116-2014 Code for fire protection in building design[S].
[3].
GB17945-2010《Fire emergency lighting and evacuation indication system》[S].
[4].
GB51309-2018 Technical Standard for Fire Emergency Lighting and Evacuation Indication System[S].
[5].
GB50058-2018 "Code for the design of power installations in explosion hazardous environment"[S].
[6].
Application of fire emergency lighting system in data center engineering.
Zhang Yanqing