ASJ系列剩余電流動(dòng)作繼電器

時(shí)間：2022-11-18作者：江蘇安科瑞電器制造有限公司瀏覽：91

1. 概述

Overview

在工業(yè)應(yīng)用中，剩余電流繼電器與外部剩余電流互感器結(jié)合使用以檢測(cè)和評(píng)估接地故障電流。它們也可以與保護(hù)裝置結(jié)合使用，以實(shí)現(xiàn)電路的斷開，從而實(shí)現(xiàn)對(duì)線路和人員的保護(hù)。

Residual current relay can be combined with external residual current transformer to detect and evaluate the ground fault current. They can also be combined with protective devices to realize the disconnection of circuits and the protection of lines and workers.

2.剩余電流的定義以及危害

Definition and risk of residual current

剩余電流，是指低壓配電線路中各相(含中性線)電流矢量和不為零的電流。通俗講當(dāng)用電側(cè)發(fā)生了事故,電流從帶電體通過(guò)人體流到大地,使主電路進(jìn)出線中的電流I相和I中的大小不相等,此時(shí)電流的瞬時(shí)矢量合成有效值稱為剩余電流，俗稱漏電。

Residual current is the current vector sum of each phase (including the neutral ) in the low-voltage distribution that not be zero. Generally, when there is an accident on the power side, the current flows from the charged body to the earth through the human body,it will cause that the current phase I in the main circuit not equal to the size in phase I. At this time, the value of instantaneous current vector synthesis is called residual current, commonly known as leakage.

TN System

3.剩余電流的危害：

Risk of residual current:

人身觸電。當(dāng)電氣設(shè)備因絕緣損壞而使外殼帶電，而工作人員又接觸此外殼時(shí)，就會(huì)導(dǎo)致人身觸電事故。

（1）Physical electric shock. When shell of the electrical equipment is electrified due to insulation damage, and the workers touch the shell again, it will lead to physical electric shock accident.

燒損電氣設(shè)備，引起火災(zāi)。長(zhǎng)期存在的漏電電流，尤其是兩相經(jīng)過(guò)電阻接地的漏電電流，在通過(guò)設(shè)備絕緣損壞處時(shí)將散發(fā)出大量的熱，使絕緣進(jìn)一步損壞，甚至使可燃性材料（如非阻燃性橡套電纜）著火燃燒。

Burn electrical equipment and cause fire. The long-term leakage current, especially the leakage current of  two-phase grounded through resistance, will release a lot of heat when flow through the damaged part of the equipment insulation, further damaging the insulation, and even making combustible materials (such as non flame retardant rubber sheathed cable) burn on fire.

引起短路事故。據(jù)統(tǒng)計(jì)，約有30%的單相接地故障發(fā)展為短路。從而造成較大的電氣故障。長(zhǎng)期存在的漏電電流及電火花使漏電處的絕緣進(jìn)一步損壞，后危及相間絕緣而造成短路。

(3) Cause short circuit accident. According to statistics, about 30% of single-phase grounded faults develop into short circuit which will give rise to heavier electrical failure. The long-term leakage current and spark further damage the insulation at the leakage point, and finally endanger the interphase insulation and cause short circuit.

引起電氣火災(zāi)事故。電網(wǎng)發(fā)生單相接地或設(shè)備發(fā)生單相碰殼時(shí)，在接地點(diǎn)就會(huì)產(chǎn)生電火花，若此電火花具有足夠的能量，就可能點(diǎn)燃易燃易爆物品。

Cause electrical fire accident. When the single-phase grounding occurs in the power grid or the single-phase collision occurs in the equipment, the electric spark will be generated at the grounding point. If the electric spark has enough energy, it may ignite flammable and explosive materials.

4.如何測(cè)剩余電流

How to measure residual current

在被測(cè)的三相導(dǎo)線路上與N線上各裝一個(gè)CT，或讓三相導(dǎo)線與N線一起穿過(guò)一個(gè)零序CT，得到三相導(dǎo)線與中性線N的電流矢量和IA*+IB*+IC*+IN*，當(dāng)沒(méi)有發(fā)生單相接地故障時(shí)，無(wú)論三相負(fù)荷平衡與否，則此矢量和為零；當(dāng)發(fā)生某一相接地故障時(shí)，故障電流中會(huì)通過(guò)保護(hù)PE及與地相關(guān)連的金屬構(gòu)件回到電源，即IA*+IB*+IC*+IN*，此時(shí)數(shù)值為接地故障電流Id。

Installing a CT on each of the three-phase conducting lines to be tested and N line or let the three-phase conductor and the n-line pass through a zero sequence CT together to get the current vector sum IA * + IB * + IC * + IN * . when there is no single-phase grounded fault, whether the three-phase load is balanced or not, the vector sum is zero; when there is a phase grounded fault, the fault current will flow through the protection PE and the metal components connected to the earth to the power supply, at this time, the value is the ground fault current Id.

5.ASJ系列剩余電流動(dòng)作繼電器

ASJ series residual current operated relay

ASJ系列剩余電流動(dòng)作繼電器可與低壓斷路器或低壓接觸器等組成組合式剩余電流保護(hù)裝置， 主要適用于交流 50Hz， 額定電壓 400V 及以下的 TT 和 TN 系統(tǒng)配電線路， 用來(lái)對(duì)電氣線路進(jìn)行接地故障保護(hù)， 防止接地故障電流引起的設(shè)備損壞和電氣火災(zāi)事故， 也可用來(lái)對(duì)人身觸電危險(xiǎn)提供間接接觸保護(hù)。

ASJ series residual current action relay can be combined with low voltage circuit breaker or low voltage contactor to form a combined residual current protection device.It is mainly used for TT and TN system distribution lines with AC 50Hz and rated voltage of 400V and below.It is used to protect the electrical circuit from ground faults, prevent equipment damage caused by ground fault current and electrical fire accidents, and can also be used to provide indirect contact protection against personal electric shock hazard


江蘇安科瑞電器制造有限公司專注于集中式電能表,配電房**系統(tǒng),三相導(dǎo)軌式電能表等

• 詞條

  詞條說(shuō)明

• Acrel-5000能耗管理系統(tǒng)在宜昌綜合保稅區(qū)及海關(guān)監(jiān)管大樓的應(yīng)用

  摘要：近年來(lái)工廠、企業(yè)等項(xiàng)目的不斷建設(shè),同時(shí),IT集成化技術(shù)、網(wǎng)絡(luò)技術(shù)、現(xiàn)場(chǎng)總線技術(shù)的不斷發(fā)展也不斷推動(dòng)了智能化系統(tǒng)的快速發(fā)展。在企業(yè)內(nèi),水、電、氣是日常運(yùn)行不可缺少的**,然而對(duì)于管理人員來(lái)說(shuō),每個(gè)月手工抄取各個(gè)用戶及設(shè)備的能耗讀數(shù)卻是非常繁重的工作,需要投入大量的人力和物力。為解決智能化工程對(duì)水、電、氣的自動(dòng)采集、記錄、分析、報(bào)表等問(wèn)題,通過(guò)設(shè)計(jì)一套能耗管理系統(tǒng)，將這些*立的檢測(cè)儀表納入到一個(gè)

• 淺談弧光保護(hù)在中低壓電力系統(tǒng)中的重要性

  【摘要】： 中低壓電力系統(tǒng)由于無(wú)母線保護(hù)、出線多，操作頻繁、三相導(dǎo)體線間距離和與大地的距離比較近、易受小動(dòng)物危害、設(shè)備制造質(zhì)量比高壓設(shè)備差，使其弧光事故的易發(fā)性大大**高壓?；诖?，本文首先闡述弧光產(chǎn)生的原因及危害，然后介紹弧光保護(hù)裝置的國(guó)家標(biāo)準(zhǔn)，結(jié)尾介紹弧光保護(hù)的原理及裝置組成。 【關(guān)鍵詞】：中低壓電力系統(tǒng)；母線保護(hù)；弧光保護(hù) 一、 前言 近年來(lái)，中低壓電力系統(tǒng)弧光故障事故頻發(fā)，不僅影響供電系統(tǒng)

• 數(shù)據(jù)中心末端直流配電系統(tǒng)產(chǎn)品的應(yīng)用

  摘 要：近年來(lái)，隨著數(shù)據(jù)中心的迅猛發(fā)展，數(shù)據(jù)中心的能耗問(wèn)題也越來(lái)越**，有關(guān)數(shù)據(jù)中心的能源管理和供配電設(shè)計(jì)已經(jīng)成為熱門問(wèn)題，合理可靠的數(shù)據(jù)中心配電系統(tǒng)方案，是提高數(shù)據(jù)中心電能使用效率，降低設(shè)備能耗的合理方式。 關(guān)鍵詞：數(shù)據(jù)中心 末端配電 列頭柜 1. 行業(yè)政策 2020年，數(shù)據(jù)中心建設(shè)被國(guó)家正式列入新基建戰(zhàn)略。近幾年越來(lái)越受到國(guó)家重視，數(shù)據(jù)中心是新基建有序運(yùn)行的基礎(chǔ)**，被視為“新基建的基礎(chǔ)設(shè)施”

• 母線弧光保護(hù)在中低壓開關(guān)柜中的應(yīng)用

  摘要：電力成套設(shè)備快速發(fā)展的今天，設(shè)備的安全穩(wěn)定運(yùn)行至關(guān)重要。而隨著電力行業(yè)和應(yīng)用領(lǐng)域的復(fù)雜化和深入性,使得中低壓成套開關(guān)設(shè)備發(fā)生故障的可能性也隨之變大。成套開關(guān)設(shè)備中母線故障產(chǎn)生的弧光將燒壞其他電器元件,從而導(dǎo)致事故擴(kuò)大,往往造成較大的經(jīng)濟(jì)損失,而母線弧光保護(hù)正好解決了這個(gè)難題，能夠很好的保護(hù)開關(guān)設(shè)備并降低損失。 關(guān)鍵詞：中低壓開關(guān)柜；母線弧光保護(hù)；弧光保護(hù)裝置 0引言 中低壓成套開關(guān)柜作為電能