Gb10237 - 1998 the insulation level and insulation test for power transformers , air gap of external insulation Gb4208 - 1993电力变压器绝缘水平和绝缘试验，外绝缘空气间隙
Power transformers - part 3 : insulation levels , dielectric tests and external clearances in air iec 60076 - 3 : 2000 corrigendum 2000 ; german version en 60076 - 3 : 2001 电力变压器.第3部分:绝缘级别,露天介电试验和外部间
Sudden changes of the weather are decreased in their effect by the high insulation level and thus most of them can be digested within the comfort range 高质量的保温把天气突变的影响降到了最低，这样就使温度变化保持在舒适的范围内。
At the last , this paper brought forward advice to improve insulation level and ability and advised several problems needed research in detail future 最后提出了改善绝缘水平和能力的建议，同时，论文中提出了今后研究中应注意的问题。
Insulation level : for 6kva products , p . f withstand voltage : 25kv , impulse withstand voltage : 60kv for 10kva products , p . f withstand voltage : 35kv , impulse withstand voltage : 75kv 绝缘水平： 6kv级产品工频耐压25kv冲击耐压60kv 10kv级产品工频耐压35kv冲击耐压75kv
There is no any partial discharge , any cracks and reduced insulation level on sg b0 10 series transformers under operation in whole effective life term due to the structures of windings with keep improving design and vacuum pressure impregnating technology 10系列非包封线圈干式变压器在运行条件下无局部放电产生。并且在整个寿命期内，无任何裂和绝缘水平下降现象。
Various factors that influence lightning strike switching rate are also analyzed . it has been showed that for some given configuration , all lightning over - voltages on substation equipments do not exceed the 1ightning strike insulation level in the case of invading waves out of lightning strike aerial input protection line 同时利用规程法、行波法、击距法对输电线路中不同杆塔型号的耐雷性能分别进行了研究和比较，对影响输电线路雷击跳闸率的各种因素进行了分析。
The core of epiipc is the 51 series microcontrollers , which automatic detect the error signal of the circuit , like short circuit , overload , high voltage , low voltage , current leakage etc . meanwhile it monitors and tests the insulation level of high voltage cable , with convenience two variable key setting and full chinese version lcd display features 本次研制的保护器以高档51系列单片机为核心,能自动判断线路中出现的短路、过载、过压、欠压、漏电等故障,并对高压电缆的绝缘水平进行实时监测,有方便的两键参数设定和全中文液晶显示功能。
Overvoltage on - line monitoring is a part of on - line monitoring technology , which is for monitoring overvoltage in power system . with development of electric network , more and more people realize effect of overvoltage for safety of electric network is important . becauce 10kv distribution network is used to supply power for user directly , its distribution is extensive , equipment is more and electric insulation level is low , it is easy that overvoltage accident occur 过电压在线监测是在线监测技术领域的一个新分支，主要是对电力系统中出现的过电压进行监测。 10kv配电网系统承担着直接向用户供电的任务，具有分布广、设备多、绝缘水平低的特点，易因过电压造成绝缘事故。
Overvoltage automatic recording device is restricted by the way which can get overvoltage from power system for a long time , and ca n ' t make great progress . because realtime recording higher voltage level power system require some special device which can get overvoltage , and some technique difficulty exist . and 10kv distribution network is used to supply power for user directly ， its distribution is extensive ， equipment is more and electric insulation level is low , it is easy that overvoltage accident occur 因为要对10kv以上更高电压等级的过电压进行实时记录对过电压获取设备的要求高，技术难度大，并考虑到10kv配电网承担着直接向用户供电的任务，分布广、设备多、绝缘水平低和过电压出现频繁，尤其在中性点不接地系统中，更易因过电压造成绝缘事故。
