【正文】 度要高得多，且這些設(shè)備在有過(guò)電壓的情況下顯得非常脆弱。安裝位置宜選擇在綜合自動(dòng)化屏交流電源空氣開(kāi)關(guān)處。對(duì)于較為重要的交流饋線上的設(shè)備，此處為直流充電屏，加裝c級(jí)三相電源避雷器。防護(hù)位置：據(jù)1EC1312(雷電電磁脈沖的防護(hù)》中的雷電保護(hù)區(qū)域的劃分原則。B級(jí)防雷一般采用具有較大通流容量的防雷裝置，可以將較大的雷電流泄散人地，從而達(dá)到限流的目的，同時(shí)將過(guò)電壓減小到一定的程度，c級(jí)防雷采用具有較低殘壓的防雷裝置，可以將回路中剩余的雷電流泄散人地，達(dá)到限制過(guò)電壓的目的，使過(guò)電壓減小到設(shè)備能耐受的水平。因此，在數(shù)據(jù)通訊接I：I中串人浪涌過(guò)電壓防護(hù)器后，必須對(duì)數(shù)據(jù)的傳輸情況進(jìn)行認(rèn)真檢查，如發(fā)現(xiàn)數(shù)據(jù)無(wú)法正常傳輸，則有可能是由于不匹配的原因?qū)е聦?duì)傳輸信號(hào)的干擾，應(yīng)更換相匹配的浪涌過(guò)電壓防護(hù)器。2 過(guò)電壓保護(hù)設(shè)計(jì)IEC(國(guó)際電工委員會(huì))TC／81技術(shù)委員會(huì)將防雷分為外部防雷和內(nèi)部防雷兩個(gè)部分，外部防雷是指避雷針(或避雷帶、避雷網(wǎng))、引下線和接地系統(tǒng)，是被保護(hù)物體免受直接雷擊；內(nèi)部防雷則是防止雷電和其他內(nèi)部過(guò)電壓侵入設(shè)備造成的毀壞。隨著綜合自動(dòng)化系統(tǒng)和通信自動(dòng)化系統(tǒng)等二次弱電系統(tǒng)在變電站的廣泛應(yīng)用，這類電子系統(tǒng)(設(shè)備)元器件的集成度愈來(lái)愈高，信息存儲(chǔ)量愈來(lái)愈大，速度和精度不斷提高，而工作電壓只有幾伏，信息電流僅為微安級(jí)，因而對(duì)外界干擾極其敏感，特別對(duì)雷電等電磁脈沖和過(guò)電壓的耐受能力很低。 The location of protection: electronic power meter through the acquisition of information on the collector39。 remote puter interface devices overvoltage protection s ability to bear a very low voltage, several hundred volts of overvoltage is enough to damage the equipment, so must the high side arrester the residual pressure (thousands of volts) to further curb to meet equipment Insulation level of need, and because of the potential rise to power and the induction loop is also overvoltage line up on KV, to be used in the exchange of integrated automation system to the exchange on the clevel singlephase installation of a surge Voltage protection. Location should choose to install automatedping in the Composite Air switch the AC power. did not ask off power supplies (UPS) overvoltage protection Install Location: AC bus (cabinet). IEC (International Electrotechnical Commission) TC/81 mine technical mittee will be divided into internal and external mine mine in two parts, the external mine is lightning rod (or with lightning, lightning network), Yin Xiaxian and grounding system, Objects to be protected from direct lightning strikes, mine is to prevent internal lightning and other internal overvoltage damage caused by invasive equipment. A prehensive mine and overvoltage protection systems must be integrated use of discharge (segregation), both pressure (and other potential), shielding (isolation), grounded, limit pressure (clamp) protection, and other technology, in accordance with the external mine And the principle of internal mine, in accordance with the targets of protective features, flexible application to take concrete measures, constitute a plete protection system. Overvoltage substation in the form are: Lightning overvoltage, the resonant frequency overvoltage and overvoltage, overvoltage operation, these overvoltage transmission or electromagnetic induction to the way the lines and equipment on a dangerous overvoltage, in particular, Lightning overvoltage, lightning substation, in the lowvoltage power supply system and weak system to produce a strong overvoltage sensor, while the substation to potential rise (for example: the substation grounding resistance to 1 Q, lightning current 10 kA, while the potential for 10 kV), due to the increased potential of the counter lines and equipment damaged lines and equipment and the events have occurred, therefore, despite the substation outside the mine system (lightning rod. Yin Xiaxian And grounding devices) in line with national standards and the requirements of Buban, and the integrated automation and munications automation systems, such as weak secondary have been taken, such as shielding, grounding, isolation, filtering, and other measures, but it can not pletely avoid overvoltage powerful lightning And voltage of the system counter the disruption caused damage and, therefore, the second weak system substation and a minevoltage must also take the appropriate protective measures, in accordance with the IEC within the mine area EMP, the device39。In recent