Electrical fire protection current limiting protector

When selecting a current limiting protector, the rated current set for the current limiting protector should be consistent with the rated current of the previous circuit breaker. For example, when the rated current of the input circuit breaker of the current limiting protector is 32A, the rated current of the current limiting protector should be set to 32A. To ensure the normal use of the current limiting protector, it is strictly prohibited to use it in distribution lines that do not match the rated current of its front-end circuit breaker.

The ASCP200 series adopts a current limiting protector with wall mounted installation, which can be installed on the wall or inside the box. It should be ensured that the installation site is free of dripping, corrosive chemical gases, and sedimentary substances, and attention should be paid to environmental temperature and ventilation for heat dissipation.Electrical fire protection current limiting protector

To ensure reliable connection, wiring should be carried out according to the wiring diagram. At the same time, in order to prevent local overheating caused by excessive contact resistance at the joint and to avoid abnormal operation of the protector due to contact, the wire head should be crimped with a suitable size U-shaped cold press head, and then inserted into the corresponding terminal of the protector and the screw should be tightened and compacted.

The protector contains alternating current inside, and unauthorized opening of the product casing is strictly prohibited. During the use of the protector, if the protected circuit experiences a short circuit or overload fault and is subjected to current limiting protection, the protector is still in a live state and is not allowed to touch the metal parts of the electrical circuit at will. After checking the circuit and troubleshooting, press and hold the reset button of the protector for about 2 seconds to restore normal operation of the protector.

When the protector experiences current limiting protection due to overheating, it may be caused by excessive load current, high ambient temperature, or ventilation and heat dissipation. Measures such as strengthening ventilation can be taken. After the protector temperature drops, press and hold the reset button to reset the protector and restore normal operation.

In order for enterprises to achieve long-term stable development, they must do a good job in fire safety management. Therefore, enterprises need to continuously optimize and improve their safety management system, and at the same time carry out fire safety publicity work, increase the publicity of fire safety education work, and fundamentally ensure the stability of enterprise operation.

Function:

ASCP electrical fire current limiting protector can effectively overcome the drawbacks of traditional circuit breakers, air switches, and monitoring equipment, such as high short-circuit current, long interruption time of short-circuit current, large arc sparks generated during short-circuit, and short service life. When a short-circuit fault occurs, it can quickly limit the short-circuit current at a microsecond speed to achieve arc extinguishing protection, thereby significantly reducing electrical fire accidents and ensuring the safety of personnel and property in the use site.

Application scope:

It can be widely used for line protection at the end of various power plants such as schools, hospitals, shopping malls, hotels, venues, temples, buildings, exhibitions, residences, warehouses, kindergartens, elderly buildings, collective dormitories, electric vehicle charging stations, rental shopping malls, wholesale markets, trade markets, and warehouses for dangerous goods of Class A, B, and C.

Ordering Example:

Specific model: ASCP200-63D

Technical requirements: Rated current 0~63A

Communication protocol: 1-channel RS485 communication, Modbus RTU protocol; 1 channel 2G wireless communication

Auxiliary power supply: AC220V 220V

Related standards and local announcements:

Requirements in DGJ08-2048-2016 "Code for Electrical Fire Protection Design of Civil Buildings":

Article 5.4.8 Electrical fire protection current limiting protectors shall comply with the following regulations:

Should comply with the relevant provisions of the current national standard "Electrical Fire Monitoring System" GB14287.6;

It should be set under the incoming switch of the terminal distribution box, and its rated current value should be consistent with the incoming circuit protection switch;

Electrical fire-resistant current limiting protectors should be installed at the end distribution boxes of rental and sales style shopping malls, wholesale markets, trade markets, and warehouses for Class A, B, and C dangerous equipment;

Electrical fire and current limiting protectors should be installed at the end distribution boxes of places such as kindergartens, elderly buildings, centralized dormitories, and electric vehicle charging stations.

DB11/791-2011 "Beijing Local Standard Code for Fire Protection Facilities Installation in Buildings" requires:

Article 9.2.1: Low voltage distribution lines inside buildings should be equipped with electrical fire monitoring systems, and their products should comply with the requirements of GB14827. Current limiting circuit breakers should be installed at the power access points of important electrical equipment.

National standard GB14287.6 "Electrical Fire Monitoring System Part 6: Electrical Fire Protection Current Limiting Protector (Draft for Comments)

Guidelines for Comprehensive Management of Electrical Fires in Shanghai:

Article 7.1: Promote the application of electrical fire-resistant current limiting protectors for quickly cutting off faulty circuits in the event of electrical short circuits, wire overloads, and heating.

Implementation Regulations for the Installation of Centralized Charging Sheds for Electric Bicycles in Changsha High tech Zone:

Article 2: The centralized parking area for electric bicycles in residential areas should have intelligent charging control facilities and equipment with functions such as timed charging, automatic power-off, fault alarm, electrical fire monitoring and visual monitoring, and arc extinguishing short-circuit protection···

backgroundElectrical fire protection current limiting protector

With the rapid development of the social economy and the continuous improvement of the degree of electrification, electrical fires are becoming increasingly frequent due to factors such as excessive electricity load and short circuits in power lines, leading to an upward trend in the number of fires.

According to the 5-year statistical analysis of the fire department, the number of residential fire accidents in places where electrical fires occur is high (51%), and short circuits and aging of power lines are the main causes of accidents.

Through the analysis of the causes of 5-year electrical fire incidents, it was found that the main reasons for the accidents were wire short circuits, overload electricity consumption, poor contact, and other factors. Among them, wire short circuits account for a large proportion (48%).

When the circuit is short circuited, the short-circuit current can reach more than ten or even dozens of times the rated current in a short period of time, causing the short-circuit point to melt instantly and sparks to splash everywhere, which can easily lead to fire accidents.

Product function, charging pile electrical fire protection current limiting protector