1：检修时应从变压器低压侧开始。配电柜断电后，清洁柜中灰尘，检查母线及引下线连接是否良好，接头点有无发热变色，检查电缆头、接线桩头是否牢固可靠，检查接地线有无锈蚀，接线桩头是否紧固。所有二次回路接线连接可靠，绝缘符合要求。 1: start from low voltage side of transformer. Power distribution cabinets, clean the dust in the cupboard, busbar and examine whether the down lead connection is good, the joint point with and without heat discoloration, check the cable head, wiring pile head are solid and reliable, and check whether there is any rust on earth wire, wiring pile head are tighten. All secondary circuit connections are reliable and insulation meets the requirements. 2： 检查抽屉式开关时，抽屉式开关柜在推入或拉出时应灵活，机械闭锁可靠。检查抽屉柜上的自动空气开关操作机构是否到位，接线螺丝是否紧固。清除接触器触头表面及四周的污物，检查接触器触头接触是否完好，如触头接触不良，必要时可稍微修锉触头表面，如触头严重烧蚀（触头点磨损至原厚度的1/3）即应更换触头。电源指示仪表、指示灯完好。 2: when checking the drawer type switch, the drawer type switchgear should be flexible when pushing or pulling out, and the mechanical locking is reliable. Check whether the automatic air switch operating mechanism on the drawer is in place, and whether the wiring screws are fastened. Remove contactor contact surface and the dirt around, check whether the contactor contactor contact is in good condition, such as contact contact undesirable, slightly revised file when necessary contact surface, such as contact serious ablation (wear contact point to the 1/3 of the original thickness) that contact should be replaced. The power indicator and indicator are in good condition. 3：检修电容柜时，应先断开电容柜总开关，用10mm2以上的一根导线逐个把电容器对地进行放电后，外观检查壳体良好，无渗漏油现象，若电容器外壳膨胀，应及时处理，更换放电装置、控制电路的接线螺丝及接地装置。合闸后进行指示部分及自动补偿部分的调试。 3: when maintenance capacitance ark, should first disconnect main switch capacitance ark, with more than 10 was one by a wire to go after discharge, the capacitor shell appearance inspection is good, no oil leakage phenomenon, if the capacitor shell expansion, should be timely treatment, replace discharge device, control circuit wiring screws and grounding device. The commissioning of the instruction part and the automatic compensation part after the closing.