数据中心环境温度提高至 32^∘C 对存量交流列头柜小型断路器可靠性的影响分析

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关键词：数据中心；交流列头柜；环境温度；可靠性

中图分类号：TM56 文献标志码：A 文章编号：2095-8188（2026）01-0071-05

DO1： 10.16628/j .cnki.2095-8188.2026.01.010

Analysis on the Impact of Increasing Data Center Ambient Temperature to 32∘C on the Reliability of Miniature Circuit Breakers in Existing AC Header Cabinets

YANG Rui， LI Xiaofeng， CHEN Jiajun， XU Nanjun（Hangzhou ZhonghengElectric Co.，Ltd.，Hangzhou 31oo53，China）

Abstract：To solve the problems of high cooling energy consumption anddificultyin Power Usage Effectiveness（PUE）optimizationin datacenters，AC header cabinets in existing data centersare takenas the research subject.Theimpact of increasing ambient temperature to 32°C ontheoperational reliabilityofminiature circuit breakers（MCBs）inthefeederbranchesof header cabinetsis focusedon，and the feasibilityofreducing PUE byraising temperature is explored.ABB S2OO seriesMCBs with a high market share are selected.Firstly，the rated currentrequirements of theAC header cabinetsarecalculated through formulas.Then，athermal modelof the header cabinet is established using Ansys software，and the internal temperature under 32 C ambient temperature is simulated.The results show that the temperature at the installation position of the feeder MCBs is ： Subsequently，combined with GB/T10963.1—2020 Electrical accessories—Circuit breakers forovercurrent protection for householdand similar instalations—Part1：Circuit-breakers for a.c.operationand product specifications，the possibilityof misoperationof thefeederMCBsisanalyzedtheoretically.Finally，experimental verificationis performed on 45 MCBs（divided into 5 groups）under the conditions of 40 ℃/45 C ambient temperatures and0.85In/1 .05In loads.The results show that increasing the ambient temperature of the data center to 32‰ does not cause misoperation ofthe MCBsin the feeder branches of the header cabinet，nor does itafect the power supply reliability.

Keywords：data center；AC header cabinet；ambient temperature；reliability

0 引言

在数字经济高速迭代的当下，数据中心作为承载算力存储、云计算与人工智能应用的核心基础设施，其规模与能耗正呈现指数级的增长趋势。（剩余5226字）