電纜接地箱說(shuō)書原理中英文對(duì)照小郭

1、文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持 .ENR-JD系列電纜接地箱原理Principle of ENR has - JD series cable groundingENR-JD系列電纜接地箱原理Principle of ENR has - JD series cable grounding一、概述35kV 大截面電力電纜和66kV、110kV 及以上電壓等級(jí)的電力電纜均為單芯電纜，電纜金屬護(hù)層一端三相互聯(lián)并接地，另一端不接地，當(dāng)雷電波或內(nèi)部過(guò)電壓沿電纜線芯流動(dòng)時(shí)，電纜金屬護(hù)層不接地端會(huì)出現(xiàn)較高的沖擊過(guò)電壓，或當(dāng)系統(tǒng)短路事故電流流經(jīng)電纜線芯時(shí)，其護(hù)層不接地端也會(huì)出

2、現(xiàn)很高的工頻感應(yīng)過(guò)電壓。上述過(guò)電壓可能擊穿電纜外護(hù)層絕緣，造成電纜金屬護(hù)層多點(diǎn)接地故障，嚴(yán)重影響電力電纜正常運(yùn)行甚至大幅減少電纜使用壽命。因此按照電力行業(yè)標(biāo)準(zhǔn) DL/T401-2002 高壓電力電纜選用導(dǎo)則的規(guī)定須采用電纜護(hù)層保護(hù)器以限制電力電纜金屬護(hù)層（或金屬護(hù)套）上的感應(yīng)電壓和故障過(guò)電壓。通常，為限制電力電纜金屬護(hù)層上的感應(yīng)電壓和故障過(guò)電壓，并避免在護(hù)層中形成環(huán)流，電纜金屬護(hù)層一端直接接地，另一端則須通過(guò)保護(hù)器接地。如果線路較長(zhǎng)，還應(yīng)將電纜護(hù)層分三段（或三的倍數(shù)段）相互絕緣，分段處的護(hù)層交叉互聯(lián)后通過(guò)保護(hù)器接地。為更好的適應(yīng)市場(chǎng)的需求，方便用戶現(xiàn)場(chǎng)安裝使用，我公司開(kāi)發(fā)了電纜接地箱，包括電纜

3、護(hù)層直接接地箱、保護(hù)接地箱和交叉互聯(lián)保護(hù)接地箱等幾種形式的護(hù)層接地裝置。裝置采用密封設(shè)計(jì)，安裝使用簡(jiǎn)便，外型小巧美觀。目前，裝置已廣泛應(yīng)用于全國(guó)各個(gè)電力系統(tǒng)，取得了良好的運(yùn)行經(jīng)驗(yàn)。An overview,35 kv large cross-section of power cable and more than 66 kv, 110 kv voltage grade of power cable for single core cable, the cable metal protecting layer three-phase connected and grounded at one en

4、d, on the other side is not grounded, when the thunder electric1文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持.文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持 .wave flow, or internal overvoltage along the cable core cable metal sheath grounding terminal will be the impact of higher overvoltage, or when the system short circui

5、t fault current flows through the cable core, the sheath is not grounded end also can appear very high induction power frequency overvoltage. Breakdown cable outer sheath insulation, the over voltage may cause the cable metal protecting layer of multipoint earthing faults, seriously affect the norma

6、l operation of power cable and even sharply reduce the service life of the cable. So according to the electric power industry standard DL/T401-2002 guidelines for the selection of hv power cable should be used in the provisions of the cable sheath protector to limit the power cable metal sheath (or

7、metal sheath) on the induction voltage and fault overvoltage.In general, in order to limit the induction voltage on the power cable metal sheath and fault overvoltage, and avoid the formation of circulation in the sheath, the cable metal protecting layer directly grounded at one end, and the other e

8、nd must through the grounding protector. If the line is longer, but also to protect the cable layer is divided into three segments (or multiples of three section) insulation, cross section of the sheath after connected by grounding protector.To better adapt to market demand, convenient user installa

9、tion use, our company developed the grounding cable box, including direct grounding box, cable sheath grounding protection box and cross linking protection grounding box and so on several forms of sheath grounding device. Device adopts the seal design, installation is simple, small and beautiful. At

10、 present, the device has been widely used in the power system, and achieved good operating experience.2文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持.文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持 .二、產(chǎn)品用途裝置連接于電纜護(hù)層與地之間。電纜護(hù)層直接接地箱，內(nèi)部含有連接銅排、銅端子等，用于電纜護(hù)層的直接接地。電纜護(hù)層保護(hù)接地箱和電纜護(hù)層交叉互聯(lián)接地箱內(nèi)含電纜護(hù)層保護(hù)器、連接銅排、銅端子等，用于電纜護(hù)層的保護(hù)接地。保護(hù)器采用ZnO壓敏電阻作為保護(hù)元件，

11、無(wú)串聯(lián)間隙，保護(hù)特性好，具有優(yōu)良的非線性伏安特性曲線。既具有瓷套式金屬氧化物避雷器的優(yōu)點(diǎn)，還具有電氣絕緣性能好、介電強(qiáng)度高、抗漏痕、抗電蝕、耐熱、耐寒、耐老化、防爆等優(yōu)點(diǎn)及良好的化學(xué)穩(wěn)定性、憎水性、密封性。Second, the product useDevice connection between the cable shield layer and ground.Cable sheath grounding box directly, contain inside connection copper platoon, copper terminals, etc., used in dir

12、ect grounding cable sheath.Cable sheath grounding protection box and cable sheath cross linking grounding in cable sheath protector, connecting the copper platoon, copper terminals, etc., for the protection of the cable sheath grounding.Protector with ZnO varistor is a protective device, no series g

13、ap, good protective properties, it has excellent nonlinear volt-ampere characteristic curve. Not only has the advantages of metal oxide surge arrester of porcelain sleeve type, but also has good electrical insulation properties, high dielectric strength, leakage resistance mark, electrical erosion r

14、esistance, heat resistance, cold resistant, aging resistant, explosion-proof advantages and good chemical stability, hydrophobic, sealing.三、使用條件1、環(huán)境溫度 - 45 +55；3文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持.文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持 .2、海拔不超過(guò)4500m；超出 4500m可根據(jù)實(shí)際情況特制；3、電源頻率： 58 62Hz（ 60Hz 系統(tǒng)）、48 52Hz（ 50Hz

15、 系統(tǒng)）；安裝場(chǎng)所的空氣中不應(yīng)含化學(xué)腐蝕氣體、爆炸性塵埃；4、長(zhǎng)期施加的工頻電壓不得超過(guò)保護(hù)器持續(xù)運(yùn)行電壓；對(duì)有間隙產(chǎn)品， 安裝點(diǎn)短時(shí)工頻電壓升高不得超過(guò)保護(hù)器額定電壓；5、長(zhǎng)期使用于異常條件，保護(hù)器需特別制作，定貨時(shí)應(yīng)說(shuō)明.Three, use conditions1-45 + 55, environment temperature;2, at an altitude of no more than 4500 m; More than 4500 m can be made according to the actual situation;3, power frequency: 58-62

16、hz (60 hz system), 48 52 hz (50 hz); Installation site should not contain chemical gas in the air, and explosive dust;4, long term applied power frequency voltage continued operation shall not exceed the protector; To have clearance products, install some short-time power frequency voltage rise shal

17、l not exceed the rated voltage protectors;5, use for a long time in abnormal conditions, protector to be specially made, an order should be stated.四、使用須知1、電纜接地箱是保護(hù)電纜護(hù)層的專用裝置，避免雷擊及感應(yīng)過(guò)電壓對(duì)電纜護(hù)層的危害。2、電纜接地箱安裝于電纜護(hù)層與地之間。連接導(dǎo)線的絕緣水平不應(yīng)低于所保護(hù)電纜外護(hù)層絕緣水平，且連接回路應(yīng)盡可能短。裝置須可靠接地。3、本產(chǎn)品不能長(zhǎng)期吸收超出耐受能力的工頻過(guò)電壓，具體型號(hào)產(chǎn)品的工頻耐受能力見(jiàn)表1。4、作

18、為可選項(xiàng)，本品可增設(shè)動(dòng)作計(jì)數(shù)器。用戶可根據(jù)需要選用，在訂貨時(shí)指明。5、產(chǎn)品安裝時(shí)， 先打開(kāi)電纜護(hù)層保護(hù)箱的蓋子，將連接電纜金屬護(hù)套的引接線及接地線穿4文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持.文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持 .入電纜護(hù)層保護(hù)箱的進(jìn)線管內(nèi)，壓接接線端子 , 套好熱縮管， 用螺栓連接接線端子；然后繞包橡膠自粘帶，加熱收縮熱縮管，使接地箱的進(jìn)線口與進(jìn)線電纜處密封可靠；最后，蓋上接地箱蓋子，用螺釘擰緊密封。6、接地箱外形與安裝尺寸以實(shí)際貨物為準(zhǔn)。7、保護(hù)接地箱和交叉互聯(lián)接地箱投入運(yùn)行1 年之后， 應(yīng)對(duì)保護(hù)器做預(yù)防性試驗(yàn)，實(shí)驗(yàn)

19、項(xiàng)目有：（ 1）直流 1mA電壓測(cè)量：在保護(hù)器兩端施加直流電壓（直流電壓的脈動(dòng)不大于1.5%），待流過(guò)保護(hù)器電流穩(wěn)定于1mA后，讀出電壓數(shù)值，此值不得小于表一中規(guī)定的直流參考電壓值；（ 2）絕緣電阻試驗(yàn)：用 2500 伏搖表檢測(cè)保護(hù)器的絕緣電阻。 其絕緣電阻值不作規(guī)定， 但每次所測(cè)結(jié)果應(yīng)相互接近，不應(yīng)有短路，接觸不良或短路現(xiàn)象。Four, the use of information1, the grounding cable box is a special device protection cable sheath, avoid lightning and the harm of cab

20、le sheath induced over-voltage.2, cable grounding box installed on the cable sheath, and between. Connection wire insulation level should not be less than the protection of cable outer sheath insulation level, and the connection circuit should be as short as possible. Device must be reliable groundi

21、ng.3, this product cant long-term absorption is out of tolerance of power frequency overvoltage, a specific model of power frequency tolerance are shown in table 1.4, as an option, this product can add counter. The user can choose according to need, specify in the order.5文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡

22、迎下載支持.文檔來(lái)源為 :從網(wǎng)絡(luò)收集整理.word 版本可編輯 .歡迎下載支持 .5, product installation, open the lid of the cable sheath protection case first, will connect the cable metal sheath of wiring and grounding line through cable sheath protection into line tube, crimping terminal, set good heat shrinkable tube, bolted connection terminals; And then winding and rubber adhesive belt, heat shrinkable tube, heat contraction of grounding box into the line and into the wire cable sealing is reliable; Finally, cover the ground box lid, with screw seal.6, grounding box appearance and installation dimensions will be subject to t