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KS11矿用变压器的铁芯为什么要接地?

KS11矿用变压器正常运行时,铁芯必须有一点可靠接地。若没有接地,则铁芯对地的悬浮电压,会造成铁芯对地断续性击穿放电,铁芯一点接地后消除了形成铁芯悬浮电位的可能。但当铁芯出现两点以上接地时,铁芯间的不均匀电位就会在接地点之间形成环流,并造成铁芯多点接地发热故障。
When the KS11 mining transformer runs normally, the iron core must have a reliable grounding. If there is no grounding, the suspension voltage of the iron core to the ground will cause the core to ground intermittent breakdown discharge, and the iron core will be grounded after grounding, eliminating the possibility of forming the iron core suspension potential. But when the iron core appears more than two points to ground, the uneven potential between the iron cores will form a circulation between the ground points, and lead to multipoint grounding heating failure of the iron core.
山东变压器厂家排名http://www.jnwdsh.comKS11矿用变压器的铁芯接地故障会造成铁芯局部过热,严重时,铁芯局部温升增加,轻瓦斯动作,甚至将会造成重瓦斯动作而跳闸的事故。烧熔的局部铁芯形成铁芯片间的短路故障,使铁损变大,严重影响KS11矿用变压器的性能和正常工作,以至必须更换铁芯硅钢片加以修复。所以KS11矿用变压器不允许多点接地只能有且只有一点接地。
 KS11矿用变压器的铁芯为什么要接地?
The core grounding fault of the KS11 mining transformer will cause the local overheating of the iron core. In severe cases, the local temperature rise of the iron core will increase, and the light gas operation will even lead to tripping of heavy gas action. The local iron core of the fused iron forms a short circuit fault between the iron chips, which causes the iron loss to become larger, and seriously affects the performance and normal operation of the KS11 mining transformer, so that the iron core silicon steel sheet must be replaced. Therefore, KS11 mining transformer does not allow multipoint grounding, only one point, and only a little grounding.
济南变压器厂解析干式变压器安装完成后,还应进行各规定项目的检查,以确保变压器安装正确无误,能够正常运行。<0>运行前的检查项目主要有:
After the completion of the installation of dry-type transformers, the Ji'nan transformer factory should also carry out the inspection of the specified items to ensure that the transformer is installed properly and can operate normally. The inspection items before the <0> run are mainly:
(1)检查所有紧固件、连接件是否有松动,并重新紧固;
(1) check all fasteners, whether the connectors are loose and re tightened;
(2)检查结线组别是否按要求△/Y11°或Y/Y12°连接,分接档的连接片,是否固定在要求档位;
(2) check wire series is connected according to the requirements of a / Y11 degrees or Y/Y12 degrees, tap gear connecting piece is fixed on the requirements of gear;
(3)检查在安装过程中是否还有异物或工具遗留;
(3) check if there are any foreign objects or tools left during the installation;
(4)检查风机,温控装置及其它辅助器件能否正常运行;
(4) check whether the fan, temperature control device and other auxiliary devices can work properly;
(5)检查外壳、铁芯装配是否永久性接地
(5) check whether the housing and the iron core assembly are permanently grounded
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