特殊环境户外照明装置电击防护失效问题分析*

董 涛（云南电网有限责任公司电力科学研究院，昆明市 650217）

王   瑶 雍   静（输配电装备及系统安全与新技术国家重点实验室，重庆市 400044）

陈 山（云南电网有限责任公司楚雄大姚供电局，云南省楚雄州 675400）

王 科（云南电网有限责任公司电力科学研究院，昆明市 650217）

董家斌（云南机电职业技术学院，昆明市 650217）

蔡 伟（云南电力技术有限责任公司，昆明市 650217）

Analysis of Electric Shock Protection Failure of Outdoor Lighting

Devices in Special Environment *

DONG Tao(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217，China)

WANG Yao YONG Jing(State Key Laboratory of Power Transmission Equipment & System

Security and New Technology, Chongqing 400044，China)

CHEN Shan(Chuxiong Dayao Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,

Chuxiong 675400,Yunnan Province，China)

WANG Ke(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217，China)

DONG Jiabin(Yunnan Vocational College of Mechanical and Electrical Technology,Kunming 650217，China)

CAI Wei(Yunnan Electric Power Technology Co.,Ltd.,Kunming 650217，China)

Abstract： The effectiveness of protection against electric shock depends on many factors. The power distribution system of outdoor lighting devices has the characteristics of wide distribution range,difficulty in implementing equipotential measures,and great influence of weather on the operating environment. In view of the protection measures against electric shock of TT system,the characteristics of contact voltage and step voltage of the earth‑termination system of outdoor lighting facilities under special weather environment and the ability of human body to withstand electric shock under this condition are analyzed,and the constraint conditions and parameter design principles for setting calculation of residual current operated protective devices are put forward accordingly.

Key words：outdoor electrical installation;protection against electric shock;residual current operated protective device;contact voltage;step voltage;earth resistance;damp environment;TT system

摘　要：电击防护有效性由多种因素决定。户外照明装置的配电系统具有分布范围广，难以实施等电位措施，运行环境受天气影响大的特点。针对TT系统的电击防护措施，分析特殊天气环境下，户外照明设施接地装置的接触电压和跨步电压特点，以及人体在该条件下的耐受电击能力；并据此提出剩余电流动作保护装置整定计算的约束条件和参数设计原则。

关键词：户外电气装置；电击防护；剩余电流动作保护装置；接触电压；跨步电压；接地电阻；潮湿环境；TT系统

中图分类号：TU88     　　  　      文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2021.09.007