如果礦用電力電纜每一次的擊穿電壓都在同一個數(shù)值上，應(yīng)考慮是否電纜的端頭發(fā)生了擊穿，此時，可以將局部放電屏蔽室大門的門連鎖開關(guān)，人為合上，將屏蔽室大門打開，進行升壓，觀察擊穿現(xiàn)象，很快就能確定端頭擊穿位置。如果經(jīng)過排查，電纜端頭未出現(xiàn)擊穿，更換多根絕緣線芯和電纜，甚至將曾今已做合格的電纜復(fù)試或空載復(fù)試。選擇電纜時候應(yīng)該選比實際使用需要的額定電壓更大一些的，允許電流應(yīng)等于或大于最大繼續(xù)供電負載電流，導(dǎo)體線芯的橫截面積需要滿足供電系統(tǒng)短路時的穩(wěn)定性的需求，貴州電線電纜依據(jù)電纜長度驗算電壓降是不是符合需求。

If you breakdown voltage of mining power cable each in the same value, should consider whether the end of cable breakdown, this can be the door interlock switch partial discharge shielding room door, artificially closed, the shielding room door open, boost, observe the breakdown phenomenon, soon to determine the end position of the breakdown. If it is checked, the end of the cable does not break through, replace a number of insulated wire core and cable, and even have now made qualified cable retest or empty retest. When the cable selection should be selected for practical use than the rated voltage need larger, should be equal to or greater than the maximum power load current to allow, the cross-sectional area of the conductor core to meet the needs of the stability of power system short circuit when the demand, according to the length of the cable voltage drop is not in line with the needs of checking.

根據(jù)零線標識，相序識別清晰，防止錯接相序。平行集束導(dǎo)線的線路，減少桿塔，橫擔(dān)和瓷件，節(jié)省大量金屬。礦用電力電纜由于絕緣化可降低桿塔高度，不受樹木，建筑群等復(fù)雜環(huán)境的影響，可沿墻敷設(shè)徹底省去電桿，工程造價低。鋼芯應(yīng)能無困難地重新組合，并易于用單手握住將接續(xù)管自導(dǎo)線切割端套入鋼芯。同樣，鋁線的成型也應(yīng)做到鋁線能容易地重新組合，并便于用單手握住將接續(xù)管自導(dǎo)線的切割端套入鋁線。由于導(dǎo)線成集束狀組合，抗拉斷力較單線成倍增加，降低單相斷線事故。在受風(fēng)壓，霜凍等張力作用時平行間的絕緣不受壓，運行安全系數(shù)提高。對防雷擊、防竊電、防漏電效果改善明顯。由于其組合可分裂性使分支跨接容易，變?nèi)萁M合方便。

According to the zero line identification, the phase sequence recognition is clear and the error sequence is prevented. The lines of parallel cluster conductors reduce rods and towers, transverse loads and porcelain pieces, and save a lot of metal. The insulation of mine power cable can reduce the height of the tower, and it is not affected by the complex environment such as trees, buildings and so on. It can lay the wall along the wall and save the poles completely, so the cost of the project is low. The steel core should be reassembled without difficulty, and it is easy to use one hand to hold the cutting end of the continuous tube self guide line into the steel core. Similarly, the molding of the aluminum wire should also be made easy to recombine the aluminum wire and make it easy to use one hand to hold the cutting end of the connecting pipe from the wire to the aluminum wire. Due to the combination of wire bundle, the tensile fracture force increases twice as much as the single line, reducing the single phase broken line accident. In the action of tension, frost and other tension, the parallel insulation is not pressed, and the safety factor of the operation is increased. The effect of lightning protection, electricity theft prevention and leakage prevention is improved obviously. Because the combination of its separability makes the branch easy to cross, the variable volume combination is convenient.