箱变运行的基本要求包括设备放置地坪应选择较高处避免低洼处以防雨水灌入影响运行,浇制混凝土平台时需留空挡便于电缆进出线敷设。箱体与接地网必须有两处可靠连接且接地和接零可共用接地网,接地网通常在基础四角打接地桩后连成一体。箱式设备周围不得违章堆物以确保电气设备通风及运行巡视需求,箱变以自然风循环冷却为主,变压器室门不应堵塞。高压配电装置中的环网开关、变压器、避雷器等设备需定期巡视维护,发现缺陷及时整修并定期进行绝缘预防性试验,操作时应正确解除机械连锁并使用绝缘棒操作。
The basic requirements for the operation of box type transformers include selecting a higher ground for equipment placement, avoiding low-lying areas to prevent rainwater from entering and affecting operation, and leaving a gap for cable entry and exit laying when pouring concrete platforms. The box and the grounding grid must have two reliable connections, and the grounding and neutral can share the grounding grid. The grounding grid is usually connected as a whole after grounding piles are driven at the four corners of the foundation. No illegal stacking is allowed around the box type equipment to ensure the ventilation and operation inspection needs of electrical equipment. The box type transformer is mainly cooled by natural air circulation, and the transformer room door should not be blocked. The ring network switch, transformer, lightning arrester and other equipment in high-voltage distribution equipment need to be regularly inspected and maintained. Defects should be promptly repaired and insulation preventive tests should be conducted regularly. During operation, mechanical interlocking should be correctly released and insulation rods should be used for operation.
箱变的巡视维护需按周期定期进行(每月不少于一次),测试电缆终端头连接处温度,检查设备运行情况并必要时进行试验。常规巡视项目包括检查基础是否牢固、孔洞是否封堵、柜体有无潮气;确认接地装置完备且连接良好,接地电阻符合要求;观察户外环境变化及是否影响交通和行人;核查各路馈线负荷情况,确保叁相负荷平衡无过载现象,开关分合位置、仪表指示正确且控制装置正常工作。
The inspection and maintenance of the transformer box should be carried out regularly (no less than once a month), testing the temperature at the cable terminal connection, checking the operation of the equipment, and conducting tests if necessary. The routine inspection items include checking whether the foundation is firm, whether the holes are blocked, and whether the cabinet is damp; Confirm that the grounding device is complete and well connected, and that the grounding resistance meets the requirements; Observe changes in outdoor environment and whether they affect traffic and pedestrian safety; Check the load situation of each feeder line to ensure that the three-phase load is balanced without overload, the switch opening and closing positions, instrument indications are correct, and the control device is working properly.

箱变内部需每年除尘一次,高压室和低压室柜体表面可用湿布擦拭,变压器吹气或吸尘器除尘。日常需检查风机运转情况,若未运行则使用温湿度控制器调现有温度以下以启动风机检测。高压开关和低压开关电动操作机构维护包括检查气压表指针是否处于绿色区域,若进入红色区域需立即分合闸操作并通知厂家处理;机械部件需用通用锂基润滑脂润滑后进行分合操作试验;电缆及避雷器需按例行试验要求进行绝缘和泄漏电流测试。
The interior of the transformer box needs to be dusted once a year. The surfaces of the high-voltage and low-voltage cabinets can be wiped with a damp cloth, and the transformer room can be cleaned with air blowing or a vacuum cleaner. Check the operation of the fan on a daily basis. If it is not running, use a temperature and humidity controller to adjust it below the current temperature to start the fan detection. Maintenance of electric operating mechanisms for high and low voltage switches includes checking whether the pressure gauge pointer is in the green area. If it enters the red area, it is necessary to immediately open and close the switch and notify the manufacturer for handling; Mechanical components need to be lubricated with universal lithium based grease before conducting opening and closing operation tests; Cables and lightning arresters need to undergo insulation and leakage current testing according to routine testing requirements.
辅助例行试验涵盖温湿度控制器、烟雾报警装置的功能测试,以及端子排和标准件的紧固检查。每年需对端子排重新紧固,操作前必须确保一次交流回路和二次控制回路断电以防触电。
The auxiliary routine test covers the functional testing of temperature and humidity controllers, smoke alarm devices, as well as the fastening inspection of terminal blocks and standard components. The terminal block needs to be re tightened every year, and before operation, it is necessary to ensure that the primary AC circuit and secondary control circuit are powered off to prevent electric shock.
维护箱变时需注意:箱变门防风机构应确保完全开启,关门时需抬起机构根部避免生拉硬拽导致变形;高压负荷开关手动操作后手柄需放回外门内侧支架防止丢失;环网柜备用回路未接电缆时需在送电前闭锁或使用绝缘帽封堵电缆座;出厂防尘帽不可替代绝缘帽使用;运行中禁止插入短路插头测试孔以防电压传感器损坏;低压隔离开关仅在解锁位置可操作,严禁强行拉拽。
Attention should be paid when maintaining the transformer box: the windproof mechanism of the transformer box door should be fully opened, and the root of the mechanism should be lifted when closing the door to avoid deformation caused by rough pulling; After manual operation of the high-voltage load switch, the handle should be returned to the inner bracket of the outer door to prevent loss; When the backup circuit of the ring main unit is not connected to the cable, it needs to be locked or sealed with an insulation cap before power transmission; The factory dust cap cannot replace the insulation cap; During operation, it is prohibited to insert a short-circuit plug into the test hole to prevent damage to the voltage sensor; The low-voltage isolation switch can only be operated in the unlocked position, and it is strictly prohibited to forcefully pull it.
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