电气防火限流式保护器应用场景及选型指南

电气防火限流式保护器可有效克服传统断路器、空气开关和监控设备存在的短路电流大、切断短路电流时间长、短路时产生的电弧火花大，以及使用寿命短等弊端，发生短路故障时，能以微秒级速度快速限制短路电流以实现灭弧保护，从而能显著减少电气火灾事故，保障使用场所人员和财产的安全。

Electrical fire protection type protector can effectively overcome the traditional circuit breaker, air switch and monitoring equipment existence of short circuit current large, short circuit current time, short circuit generated arc spark, and short service life and other drawbacks, short circuit fault, can quickly limit the short circuit current at a microsecond speed to achieve arc extinguishing protection, thereby significantly reducing electrical fire accidents, to ensure the safety of people and property in the place of use.
电气防火限流式保护器是单相限流式保护器，可广泛应用于学校、医院、商场、宾馆、娱乐场所、寺庙、文物建筑、会展、住宅、仓库、幼儿园、老年人建筑、集体宿舍、电动车充电站及租赁式商场商铺、批发市场、集贸市场、甲乙丙类危险品库房等各种用电场所末端干、支路的线路保护。

Electrical fire protection type protector is a single-phase flow limit protector, which can be widely used in schools, hospitals, shopping malls, hotels, entertainment venues, temples, cultural relics buildings, exhibitions, residences, warehouses, kindergartens, buildings for the elderly, collective dormitories, electric vehicle charging stations and rental shopping malls, wholesale markets, bazaars, A and B C dangerous goods warehouses and other terminal dry and branch line protection of various power places.

对于电动车充电桩，国家标准GB51348-2019《民用建筑电气设计标准》中13.5.5规定，储备仓库、电动车充电等场所的末端回路应设置限流式电气防火保护器。

For electric vehicle charging piles, the national standard GB51348-2019 "Civil Building Electrical Design Standards" in 13.5.5 stipulates that the terminal loop of reserve warehouses, electric vehicle charging and other places should be equipped with a limited-current electrical fire protection protector.

对于如此庞大数量的充电桩，该如何应用电气防火限流式保护器呢？众所周知，电动车充电桩主要分为两大类，一类是直流充电桩，俗称“快充桩”，一类是交流充电桩，俗称“慢充桩”。直流充电桩充电功率一般为30kW、60kW、120kW，交流充电桩充电功率一般为3.5kW、7kW、14kW。

For such a large number of charging piles, how to apply electrical fire protection current limit protectors? As we all know, electric vehicle charging piles are mainly divided into two categories, one is DC charging piles, commonly known as "fast charging piles", and the other is AC charging piles, commonly known as "slow charging piles". The charging power of DC charging pile is generally 30kW, 60kW, 120kW, and the charging power of AC charging pile is generally 3.5kW, 7kW and 14kW.

如何针对这两类充电桩进行电气防火限流式保护器的设计成为很多设计师的难题，下面就此两类充电桩进行探讨。

How to design an electrical fireproof current limit protector for these two types of charging piles has become a problem for many designers, and the following two types of charging piles are discussed.

对于直流充电桩，一般是三相电经过AC/DC模块输出直流，按照30kW计算，交流侧电流约为50A、而60kW交流侧约为100A，按照设计要求，在交流侧安装三相50A/100A或者直流侧安装直流限流式保护器。目前市场上限流式保护器均为交流，鲜有三相限流式保护器。推荐使用绝缘监测仪，监测绝缘充电桩的绝缘状况。

For DC charging piles, generally three-phase electricity through the AC / DC module output DC, according to 30kW calculation, AC side current is about 50A, and 60kW AC side is about 100A, according to the design requirements, install three-phase 50A/100A on the AC side or DC side installed DC current limiting protector. At present, the upper limit of the market flow protector is AC, and there are few three-phase flow limit protectors. It is recommended to use an insulation monitor to monitor the insulation condition of the insulated charging pile.

对于交流充电桩，一般是市电直接接入，按照双枪14kW功率计算，额定电流约为63A，按照设计要求，可以在充电桩前端按照额定电流设计匹配的电气防火限流式保护器。功能特点。

For AC charging piles, generally is the direct access of mains power, according to the double gun 14kW power calculation, the rated current is about 63A, according to the design requirements, can be in front of the charging pile according to the rated current design matching electrical fire protection protector. Features.

功能特点
■ 短路保护功能。保护器实时监测用电线路电流，当线路发生短路故障时，能在 150 微秒内实现
快速限流保护，并发出声光报警信号。

■ Short circuit protection function. The protector monitors the power line current in real time, and when the line has a short-circuit fault, it can achieve fast current limit protection within 150 microseconds and issue an audible and visual alarm signal.
■ 过载保护功能。当被保护线路的电流过载且过载持续时间超过动作时间（3~60 秒可设）时，保
护器启动限流保护，并发出声光报警信号。

■ Overload protection function. When the current of the protected line is overloaded and the overload duration exceeds the operating time (3 to 60 seconds can be set), the protector activates the current limit protection and issues an audible and visual alarm signal.
■ 表内超温保护功能。当保护器内部器件工作温度过高时，保护器实施超温限流保护，并发出声
光报警信号。

■ In-table over-temperature protection function. When the operating temperature of the internal device of the protector is too high, the protector implements over-temperature current limit protection and emits an audible and visual alarm signal.
■ 过欠压保护功能。当保护器检测到线路电压欠压或过压时，保护器发出声光报警信号，可预先
设置是否启动限流保护。

■ Over-undervoltage protection function. When the protector detects an undervoltage or overvoltage of the line voltage, the protector emits an audible and visual alarm signal, which can be preset to activate the current limit protection.
■ 配电线缆温度监测功能。当被监测线缆温度超过报警设定值时，保护器发出声光报警信号，可
预先设置是否启动限流保护。

■ Distribution cable temperature monitoring function. When the temperature of the monitored cable exceeds the alarm setpoint, the protector emits a sound and light alarm signal, which can be preset to activate the current limit protection.
■ 漏电流监测功能。当被监测的线路漏电超过报警设定值时，保护器发出声光报警信号，可预先
设置是否启动限流保护。

■ Leakage current monitoring function. When the monitored line leakage exceeds the alarm setpoint, the protector emits an audible and visual alarm signal, which can be preset to start the current limit protection.
■ 通讯及扩展性。保护器具有 1 路 RS485 接口， 1 路 2G 或 NB-IoT 无线通讯。可以将数据发送到后台监控系统，实现远程监控。监控后台可以是安科瑞 Acrel-6000/B 电气火灾监控主机，也可以是安科瑞

■ Communication and extensibility. The protector has 1 RS485 interface, 1 2G or NB-IoT wireless communication. Data can be sent to the background monitoring system for remote monitoring. The monitoring background can be an Acrel-6000/B electrical fire monitoring host or an Ankerui
Acrel-6000 安全用电管理云平台，或第三方监控软件或平台

Acrel-6000 Secure Power Management Cloud Platform, or third-party monitoring software or platform

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