入伏后全国多地持续高温，工业、数据中心、商业建筑等场景用电负荷同步攀升，电气设备进入全年故障高发期。高温会加剧导体发热、加速绝缘老化、松动电气连接，运维管控缺位极易引发温升超标、绝缘击穿甚至电气火灾。 After the start of the fu period, sustained high temperatures prevail across many regions nationwide. Power consumption loads rise simultaneously in industrial plants, data centers, commercial buildings and other sites, making electrical equipment prone to faults all year round. High temperatures intensify conductor heat generation, accelerate insulation aging and loosen electrical connections. Insufficient operation and maintenance management can easily lead to excessive temperature rise, insulation breakdown and even electrical fires.
本文依据 GB 7251、GB 50150、GB 50054 等现行标准，围绕母线槽、配电柜两大核心设备，梳理夏季运维排查要点、规范操作与隐患处置方案，为各场景用电安全提供专业指引。 Based on current standards including GB 7251, GB 50150 and GB 50054, this paper focuses on two core pieces of equipment – busway and power distribution cabinet. It sorts out key inspection points, standardized operating procedures and hidden danger disposal solutions for summer operation and maintenance, providing professional guidance for power safety in various scenarios.
载流降容，温升叠加：环境每升高 5℃，设备载流能力下降 5%~8%，长期满负荷运行易突破国标温升限值。 Current-carrying capacity derating & accumulated temperature rise: For every 5°C rise in ambient temperature, the equipment’s current-carrying capacity drops by 5%~8%. Long-term full-load operation tends to exceed the national standard limit for temperature rise.
绝缘老化，击穿风险上升：高温加速有机绝缘材料热裂解，叠加潮湿粉尘易引发爬电、击穿。 Insulation aging & higher breakdown risk: High temperatures accelerate thermal cracking of organic insulating materials. Combined with humidity and dust, this may easily cause tracking discharge and insulation breakdown.
连接应力松弛，接头发热恶性循环：热胀冷缩加剧螺栓松动，接触电阻持续升高，发热问题逐级放大。 Relaxed connection stress & vicious cycle of joint overheating: Thermal expansion and contraction aggravate bolt loosening, which continuously increases contact resistance and worsens heat generation step by step.
散热通道堵塞，内部积热：粉尘油污堵塞散热路径，高温下散热效率进一步下降。 Blocked heat dissipation passages & internal heat accumulation: Dust and oil stains block heat dissipation paths, further reducing heat dissipation efficiency under high temperatures.
母线槽是大电流输配核心，也是夏季温升故障高发设备，需从巡检、维护、处置全流程闭环管控。 As the core component for high-current power transmission and distribution, busways are highly susceptible to temperature rise faults in summer. Closed-loop management covering the full process of inspection, maintenance and fault disposal shall be implemented.
高峰期间常规场景每周巡检≥2 次，重要负荷每日巡检 1 次，高峰时段加密测温。 During peak power consumption periods, general sites shall be inspected no less than twice a week, and critical load equipment once daily. Temperature measurement shall be conducted more frequently during peak hours.
红外测温（核心）：重点检测连接接头、插接单元、转角 / 变径段、封闭竖井段；按 GB 7251.2 要求导体温升限值 70K，同回路相邻点位温差超 15K 需重点关注；建立测温台账，同步记录环境温度、负荷电流，纵向对比趋势。 Infrared temperature measurement (core procedure): Focus on connecting joints, plug-in units, corner/reducer sections and enclosed shaft sections. Per GB 7251.2, the allowable temperature rise limit for conductors is 70K. Any temperature difference over 15K between adjacent points on the same circuit shall be closely monitored. Establish a temperature measurement log to record ambient temperature and load current synchronously for longitudinal trend comparison.
外观与环境核查：检查壳体密封、穿墙封堵是否完好，通风通道是否堵塞，有无异常电磁噪音、焦糊异味。 Visual & environmental inspection: Check the integrity of cabinet sealing and wall penetration sealing, whether ventilation passages are blocked, and detect abnormal electromagnetic noise or burnt odor.
结构与接地检查：支吊架、伸缩节无卡滞，接地干线连接连续可靠。 Structural & earthing inspection: Ensure no jamming on support hangers and expansion joints, and continuous, reliable connection of main earthing conductors.
全面清洁壳体、散热缝隙积尘油污，保障散热通畅； Thoroughly remove dust and oil accumulated on cabinets and heat dissipation gaps to ensure unobstructed heat dissipation.
停电后按厂家标准扭矩复核所有连接端螺栓，补偿热胀冷缩导致的应力松弛； After power cut, retighten all terminal bolts in accordance with the manufacturer’s standard torque to compensate for stress relaxation caused by thermal expansion and contraction.
用 1000V 兆欧表测试相间、相对地绝缘电阻，低压母线应≥0.5MΩ，阻值偏低需排查受潮、老化问题。 Test inter-phase and phase-to-earth insulation resistance with a 1000V megohmmeter. The insulation resistance of low-voltage busways shall be no less than 0.5MΩ. If the reading is low, troubleshoot dampness and insulation aging issues.
接头温升超标：过载导致的立即降负荷；接触不良的停电打磨接触面、涂导电膏、按扭矩复紧，复测合格后方可送电；封闭敷设场景增设机械通风。 Excessively high joint temperature rise: Immediately reduce load if caused by overload. For poor contact, cut off power, polish contact surfaces, apply conductive grease, retighten bolts to specified torque, and restore power only after passing re-inspection. Install mechanical ventilation for enclosed installation scenarios.
绝缘电阻偏低：排查进水凝露，通风干燥；绝缘层破损老化及时更换，严禁带隐患运行。 Low insulation resistance: Check for water ingress and condensation, and ventilate to dry the equipment. Replace damaged or aged insulation layers promptly; operation with hidden dangers is strictly prohibited.
插接单元发热：检查插接爪变形氧化情况，轻微打磨修复，严重则更换部件，确保插接到位锁止可靠。 Overheating plug-in units: Inspect plug-in claws for deformation and oxidation. Conduct minor polishing for slight defects, and replace severely damaged components to guarantee full insertion and reliable locking.
美嘉科技 Optimus PRO 系列环氧树脂浇筑母线、流化绝缘母线槽，采用一体式绝缘成型工艺，绝缘层与高纯度无氧铜导体无缝贴合，耐温等级达 H 级（180℃），高温环境下载流稳定性更强；致密结构具备优异的防潮防尘防腐蚀能力，可有效规避夏季高温高湿引发的绝缘老化、击穿风险；低阻抗导体设计运行温升更低，长期运行免维护，大幅降低夏季运维压力。 Mega Technology Optimus PRO Series epoxy cast busways and fluidized insulated busways adopt integrated insulation molding technology. The insulation layer is seamlessly bonded with high-purity oxygen-free copper conductors, achieving a Class H temperature resistance rating (180°C) for superior current-carrying stability under high temperatures. Its dense structure delivers outstanding moisture-proof, dust-proof and anti-corrosion performance, effectively preventing insulation aging and breakdown caused by hot and humid summer conditions. The low-impedance conductor design generates lower operating temperature rise and requires zero maintenance for long-term operation, greatly reducing summer operation and maintenance workload.
配电房环境温度控制在 5℃~40℃，湿度≤75%，保障空调、通风、除湿设备正常运行； Maintain the power distribution room ambient temperature between 5°C and 40°C with humidity ≤75%, and ensure air conditioning, ventilation and dehumidification equipment operate normally.
监测各回路电流电压，三相负荷不平衡度≤10%；核查断路器、接触器有无异响、异味、变色； Monitor current and voltage of each circuit, and keep the three-phase load unbalance degree within 10%. Check circuit breakers and contactors for abnormal noise, peculiar smell or discoloration.
电容补偿柜重点检查电容器有无鼓包漏液，电抗器有无过热。 For capacitor compensation cabinets, focus on checking capacitors for bulging and liquid leakage, and reactors for overheating.
停电清理柜内积尘杂物，保持散热风道畅通； Cut off power and clean dust and debris inside cabinets to keep heat dissipation air ducts unobstructed.
复核主回路、二次端子紧固件，消除热胀冷缩松动隐患； Recheck fasteners for main circuits and secondary terminals to eliminate loosening risks from thermal expansion and contraction.
校验保护定值与功能，确保与实际负荷匹配，避免高温下误动或拒动。 Calibrate protection setting values and functions to match actual loads, preventing false tripping or failure to trip under high temperatures.
元器件过热、电容器鼓包、三相负荷失衡等问题，第一时间降负荷、断电更换或调整分配，严禁带病运行。 In case of component overheating, capacitor bulging, three-phase load imbalance and other faults, reduce the load or cut off power immediately for component replacement or load adjustment. Operation with faults is strictly forbidden.
停电检修严格执行 “停电、验电、接地、挂牌、上锁” 流程，由持证电工操作；高温带电巡检做好防护，严禁触碰高温带电部件。 For power-off maintenance, strictly implement the "power cut, voltage test, earthing, warning tag posting, lockout" procedure, which shall only be performed by certified electricians. Wear full protective gear during live-line inspection under high temperatures, and never touch hot live components.
高温天气避免设备满负荷运行，严禁私自增容；发现异常立即降负荷或断电，故障排除并复测合格后方可送电；运维台账全程留痕，实现排查 - 整改 - 复查闭环。 Avoid full-load operation of equipment during hot weather; unauthorized capacity expansion is prohibited. Reduce load or cut off power immediately once abnormalities are detected, and restore power only after faults are eliminated and re-inspection passes. Keep complete operation and maintenance records to form a closed loop of inspection, rectification and recheck.
从根源降低夏季运维压力：高温高湿、多粉尘场景优先选用耐温防护性能优异的环氧树脂浇筑 / 流化绝缘母线；大负荷封闭敷设预留充足降容余量；重要负荷配套智能监测装置，变被动处置为主动预防。 Reduce summer maintenance pressure from the source: Prioritize epoxy cast /fluidized insulated busways with excellent temperature resistance and protection for high-temperature, high-humidity and dusty sites. Reserve sufficient capacity derating margin for enclosed installation under heavy loads. Equip critical loads with intelligent monitoring devices to shift from passive fault disposal to active prevention.
美嘉科技 Optimus PRO 全系列配电产品，均执行严于国标的内控品控标准，适配各类高温复杂工况；配套完整技术服务体系，可从选型设计、交付到运维指导全流程为项目提供支持。 All power distribution products of Mega Technology Optimus PRO Series adopt internal quality control standards stricter than national specifications, suitable for various complex high-temperature working conditions. Supported by a comprehensive technical service system, we provide full-process project support covering model selection, design, delivery and operation & maintenance guidance.
如果您有配电系统夏季隐患排查、设备升级改造、运维技术咨询等需求，欢迎私信后台对接专业支持。 If you require services including summer hidden danger inspection of power distribution systems, equipment upgrading & renovation, or operation & maintenance technical consultation, please send a private message to our backend to arrange professional technical support.