Talk about the application of electrical fire protectors in underground shopping malls

Ren Yunye (Ankerui Electric Co.
, Ltd.
, Shanghai, Jiading 201801) Abstract: In recent years, the speed of urban development in China has accelerated
.

Many cities have vigorously built underground construction facilities, such as subways, underground parking lots, and underground shopping malls
.

Underground shopping malls are densely populated buildings, and their fire protection design has always been a headache
for relevant experts.

Due to the dense number of people, poor fire prevention treatment will lead to catastrophic consequences
.

Therefore, fire prevention is very important
.

Fire protection design can focus on both evacuation and fire detection alarm systems, and electrical fire monitoring systems play an important role
in the actual early warning and alarm process.

Electrical fire limited current limiter can effectively overcome the traditional circuit breaker, air switch and monitoring equipment existing short circuit current, cut off short circuit current time is long, short circuit generated arc spark large, and short service life and other drawbacks, when the short circuit fault occurs, can quickly limit the short circuit current at microsecond speed to achieve arc extinguishing protection, so as to significantly reduce electrical fire accidents, to ensure the safety of personnel and property in the
place of use.

The Su version of the civil electric fire regulation and the Shanghai version of the civil electric fire regulation have the same
description of the electrical fire restrictive protector.

Keywords: underground shopping malls; Densely populated; Difficulty escaping; Line aging; Short circuit protection; Overload protection, smart arc extinguishing 0 Industry background In recent years, the development speed of China's cities has accelerated
.

The completion and improvement of commercial buildings has provided people with a place
for leisure and shopping.

However, the surface area is limited, and many cities vigorously build underground construction facilities, such as subways, underground parking lots, and underground shopping malls
.

Underground shopping malls are densely populated buildings, and their fire protection design has always been a headache
for relevant experts.

Generally speaking, shopping malls mainly include supermarkets, clothing stores, food stores, cinemas and other places, and the use of open or internal atrium fire protection design forms
in the shopping mall.

There are many types of fires in large shopping malls, and the specific conditions of fires are inextricably linked
to the design of shopping malls, as well as the location of the fire and the expansion of space.

Once not handled well, it will lead to catastrophic consequences
.

Therefore, its fire protection is very important
.

Fire protection design can focus on both evacuation and fire detection alarm systems, and electrical fire monitoring systems play an important role
in the actual early warning and alarm process.

Electrical fire monitoring system includes a number of contents, electrical fire monitoring equipment, residual current type electrical fire monitoring detector, temperature measurement type electrical fire monitoring detector, fault arc detector, electrical fire restrictive protector, middle line security protector, etc
.

Shanghai Municipality's engineering building code "Civil Building Electrical Design Fire Protection Regulations" issued in 2016 has a relevant description of the electrical fire restrictive protector, the procedure is DGJ 08-2048-2016, of which Article 5.
4.
8 stipulates: "The end distribution box of rental and sale shopping malls, wholesale markets, bazaars, Class A, B and C dangerous goods warehouses and other places shall be provided with electrical fire restrictive protectors; Kindergartens, buildings for the elderly, collective dormitories and electric vehicle charging stations and other places should be equipped with electrical fireproof restrictive protective gear
.

In 2019, Jiangsu Province issued the local standard "Building Electrical Fire Protection Design Regulations", standard DB 32/T 3698-2019
.

The Su version of the civil electric fire regulation and the Shanghai version of the civil electric fire regulation have the same
description of the electrical fire restrictive protector.

This article briefly introduces the application of electrical fire protectors in an underground shopping mall
.

1 Product Introduction ASCP series electrical fireproof current-limiting protector is Acquaray specially developed to protect the short circuit, overload and other problems in the low-voltage distribution line, which can effectively overcome the large short-circuit current existing in the traditional circuit breaker, air switch and monitoring equipment, the long time of cutting off the short circuit current, the large arc spark generated when the short circuit is short, and the short service life and other drawbacks, when the short circuit fault occurs, the short circuit current can be quickly limited at a microsecond speed to achieve arc extinguishing protection.
This can significantly reduce electrical fire accidents and ensure the safety
of personnel and property in the use of places.

The protector can be widely used in schools, hospitals, shopping malls, hotels, entertainment places, temples, cultural relics buildings, libraries, archives, exhibitions, residences, warehouses, kindergartens, buildings for the elderly, collective dormitories, electric vehicle charging stations and rental and sale shopping malls, wholesale markets, bazaars, Class A and B C dangerous goods warehouses and other electricity terminals at the end of the dry and branch road protection
.

ASCP200-20D is a simple protector, mainly suitable for lighting and socket circuits
with rated current below 20A.

ASCP200-40D is a functional protector that is mainly suitable for sockets and other power loops
with rated current of less than 40A.

Both types of protectors are rail-mounted and can be mounted
side-by-side with the air circuit breaker.

ASCP200-20D ASCP200-40D2 Features Introduction Short-circuit protection function
.

The protector monitors the current of the power line in real time, and when the line has a short-circuit fault, it can achieve fast current limit protection within 150 microseconds and issue a sound and light alarm signal
.

Overload protection function
.

When the current of the protected line is overloaded and the overload duration exceeds the operation time (3 to 60 seconds can be set), the protector starts the current limit protection and issues an audible and visual alarm signal
.

In-meter over-temperature protection
.

When the operating temperature of the internal device of the protector is too high, the protector implements over-temperature current limit protection and issues an audible and visual alarm signal
.

Communication function
.

The protector has a 1-way RS485 interface, Modbus-RTU protocol
.

Data can be sent to the background monitoring system for remote monitoring
.

ASCP200 series comes standard with the above four functions, ASCP200-40D functional model also includes over-voltage protection function, cable temperature monitoring function, residual current monitoring function, optional wireless communication mode, support 4G, NB-IoT
.

3 Product application The following figure is an example
of the design of an electrical fireproof restrictive protector installed in the electrical circuit of the student dormitory.

For the terminal distribution box of the shopping mall, the electrical fireproof current-limiting protector is installed in the outlet loop, and the current of the power supply loop passes through the protector first, and then connects to the socket or lighting circuit
.

All terminal equipment can be wired or wireless access to the electrical fire monitoring host, the host is set in the underground shopping mall of the control room, the control room can also be arranged wisdom fire cloud platform, monitoring all access to the fire equipment, cloud platform can be accessed by web page, but also support mobile phone APP to view data and alarm
.

The networking method is shown in the following figure: It is convenient for the duty personnel of the consumption control room to manage and maintain the fire protection of the entire dormitory area and even the fire protection of the entire school, provide effective remote technical support, timely find hidden dangers, timely find problems, troubleshoot problems and solve problems
.

4 On-site installation The on-site installation is shown in the following figure The platform interface is shown below
.

The mobile APP interface is as follows: 5 Conclusion Underground shopping malls are densely packed, and most of the shops are self-decorated, the water and electricity design is rough, the fire hazard is larger, if there are conditions, special transformation can be carried out, and management and monitoring can be strengthened if conditions are not allowed to prevent fire and electricity accidents
.

The electrical fire protection device can be short-circuit arc extinguishing on the basis of monitoring, which effectively supplements the electrical fire monitoring system and improves the prevention and treatment
of electrical fire.

For underground shopping malls with installed electrical fire equipment, intelligent power management solutions can be adopted and modern networks can be usedNetwork technology, safe electricity cloud platform or smart fire cloud platform to manage and maintain the end of the entire shopping mall electricity consumption, to achieve reliable, safe, energy-saving and effective power management
.

Reference[1] Ankeri Enterprise Microgrid Design and Application Handbook.
2021.
07 Edition[2]Li Qian, Liu Tingquan.
Performance-based fire protection design analysis of fire protection partition in a shopping mall[J].
Fire Science and Technology, 2016, 35(11):3.
Li Hongwei.
Some thoughts on fire protection design of large shopping malls[J].
Enterprise Research, 2014(8X):1.
Author's Introduction: Ren Yunye, male, currently working in Ankerui Electric Co.
, Ltd.
, the main research direction is the field of low-voltage distribution and safe use of
electricity.