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摘要：剖析了剩下电流继电器的必要性，介绍了ASJ剩下电流继电器的首要功用、作业原理、分类状况和提出了在挑选剩下电流维护断路器时的准则和注意事项。现就马尔代夫某发电机组项目加装我司剩下电流继电器做一扼要介绍。
Abstract: the necessity of applying residual current, the main functions, working principle, classification situation of ASJ residual current relay are introduced, and the principles and precautions in selecting residual current protection circuit breaker are indicated. This is a brief introduction about the addition of our company application of ASJ residual current relay in a generator set project in Maldives.关键词：ASJ剩下电流继电器；发电机组；运用。Keywords: ASJ residual current relay; generator set; application.1.项目概述 Project overview本项目坐落马尔代夫，设备剩下电流继电器是为了检测剩下电流，将剩下电流值与基准值相比较，当剩下电流值超越基准值时，宣布一个机械开闭信号（使机械开关电器脱扣或声光报警设备宣布报警）。剩下电流继电器一般与低压断路器或低压触摸器等组成组合式剩下电流维护设备，首要适用于沟通50Hz，额外电压400V及以下的TT和TN体系配电线路，用来对电气线路进行接地毛病维护，避免接地毛病电流引起的设备损坏和电气火灾事端，也可用来对人身触电风险供给直触摸摸维护，因此低压供配电体系中广泛运用。This project is located in Maldives. The purpose of the residual current relay installed is to detect the residual current and compare the residual current value with the base value. When the residual current value exceeds the base value, it will send out a mechanical on-off signal (to make the mechanical switch tripped or the acousto-optic alarm device send out an alarm).Residual current relay usually with low voltage circuit breaker or low voltage contactor, etc combined residual current protection device, mainly applied to ac 50 hz, rated voltage 400 v and below the TT and TN system distribution circuit, used to ground fault protection electric circuit, prevent equipment damage caused by ground fault current and electrical fire accident, also can be used to provide indirect contact to person get an electric shock risk protection, and therefore is widely used in low voltage power supply and distribution system.2.剩下电流继电器首要用途 Main uses of residual current relay2.1 直触摸摸电击维护 Protection of Indirect Contact Electric Shock直触摸摸电击维护的办法是主动堵截电源。GB 13955“对直触摸摸电击事端的防护”规则：“直触摸摸电击事端防护的首要办法是选用主动堵截电源的维护方法，以避免因为电气设备绝缘损坏产生损坏事端。当电路产生绝缘损坏形成接地毛病。其毛病电流值小于过电流维护设备的动作电流值时，应设备剩下电流维护设备。”研讨标明，人体触摸电压的安全值为 50 V。为确保人身安全，电气设备的任何部分产生绝缘毛病时，一旦触摸电压超越 50 V 时，需要在规则的时间内主动堵截毛病部分电源。过电流维护设备受电气线路和设备及本身动作值约束，不能主动堵截电源。剩下电流维护设备不受负荷电流影响，可与过电流维护设备合作运用，作直触摸摸电击维护 。The measure of indirect contact electric shock protection is to automatically cut off the power supply. GB 13955" the protection of indirect contact electric shock accident "stipulates :" the main measure of indirect contact electric shock accident protection is to adopt the protection mode of automatically cutting off the power supply to prevent the damage accident caused by the insulation damage of electrical equipment. When the circuit insulation damage caused by grounding fault. When the fault current value is less than the operating current value of the over-current protection device, the residual current protection device shall be installed ." According to the research, the safe value of contact voltage is 50V. For personal safety, when insulation failure occurs in any part of the electrical device, once the contact voltage exceeds 50V, it is necessary to automatically cut off the fault part of the power supply within the specified time. The over-current protection device is limited by the electrical circuit and equipment and its own action value, and can not automatically cut off the power supply. The residual current protection device is not affected by the load current and can be used in conjunction with the over-current protection device for indirect contact electric shock protection.2.2 接地毛病维护 Ground fault protection接地是带电导体和大地、接地的金属外壳或与地有联络的构件之间的触摸，其毛病或许导致人身电击伤亡和设备损坏，严峻时或许引发电气火灾。接地毛病维护曩昔一般选用过电流维护设备进行维护，当接地毛病电流大于过电流维护设备定值时，由过电流维护设备堵截毛病电路。TT体系中额外电流较大、配电线路较长的线路，TN体系中带电导线落地接地毛病、不安全的金属性接地毛病、电弧性接地毛病时，都有或许呈现接地毛病电流小于过电流维护动作整定电流，过电流维护设备不动作的状况。剩下电流维护设备，或带接地毛病维护的断路器，能可靠地进行接地毛病维护。Grounding is the contact between a live conductor and the earth, a grounded metal shell or a component connected to the ground. Its failure may lead to personal electric shock casualties and equipment damage, and may cause electrical fire in serious cases. Ground fault protection used to be protected by over-current protection device. When the grounding fault current is greater than the fixed value of the over-current protection device, the fault circuit is cut off by the over-current protection device.In TT system, the line with larger rated current and longer distribution line, grounding fault of live conductor, unsafe metallic grounding fault and arc grounding fault in TN system may occur that the grounding fault current is less than the setting current of over-current protection action, and the over-current protection device does not act. Residual current protection device, or circuit breaker with ground fault protection, can reliably carry out ground fault protection.2.3 电气火灾维护 Electrical fire protection电气火灾一般由电气短路引起，电气短路包含金属性短路和电弧性短路。前者是带电导体间（如相与相之间、相与 N 线之间）短路，多以高温熔焊金属为通路，毛病电流以千安计，高温易使绝缘氧化而自燃，火灾风险虽大，但可用带短路维护的断路器和熔断器维护，由断路器瞬时动作堵截电源，避免火灾。后者是带电导体对地短路，多以电弧为通路，毛病电流虽小，但一方面电弧长期连续，部分温度高，很简单点着周边可燃物质，引发火灾；另一方面，又不足以使一般断路器动作跳闸堵截电源。所以电弧性短路引起火灾风险远大于金属性短路。带剩下电流动作维护功用的断路器可在过电流维护设备不动作的状况下堵截保证电路，避免电弧性短路引发的电气火灾。Electrical fire is usually caused by electrical short circuit, which includes metal short circuit and arc short circuit. The former is a short circuit between live conductors (such as between phases, between phases and N lines). The fault current is calculated in kilo ampere. High temperature is easy to cause insulation oxidation and spontaneous combustion.Although the fire hazard is great, it can be protected by circuit breakers and fuses with short circuit protection, and the power supply is cut off by instantaneous action of circuit breaker to avoid fire. The latter is a live conductor short circuit to the ground, mostly arc as the path, although the fault current is small, but on the one hand, the arc lasts for a long time, the local temperature is high, it is easy to ignite the surrounding combustible material and cause fire. Therefore, the fire hazard caused by arc short circuit is much greater than that of metal short circuit. The circuit breaker with residual current action protection function can cut off the support circuit without the operation of the over-current protection device to prevent the electrical fire caused by the arc short circuit.3.ASJ系列剩下电流继电器 ASJ Series of Residual Current Relay3.1 类型和功用 Model & Function
3.2 技术参数 Technical Parameters
3.3 典型运用示意图 Typical Application Schematic
4.剩下电流继电器在发电机组项目现场设备图片 Pictures of the installation of the residual current relay on the generator set project site
5.小结 Summary安科瑞电气的ASJ系列剩下电流继电器自推出以来，在工业、民用、地铁、智能建筑等多种场合运用，起到了较好的维护作用，值得推行运用。Acrel ASJ series of residual current relays have been applied in many occasions, such as industry, civil, subway, intelligent building and so on, which has played a good protective effect and is worth promotional use.修改：安科瑞孙斌
公司：江苏安科瑞电器制作有限公司
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