中煤科工达州雷音隧道施工用电安全专项方案编 制：复 核：审 核：二零一七年六月目 录1 编制依据........................................................................................................12 工程概况........................................................................................................13 施工方案........................................................................................................23.1 用电负荷计算.............................................................................................................23.2 供配电系统方案...........................................................................................................3.3 电流计算及电缆选择...............................................................................................153.4 高压进洞方案...........................................................................................................164 施工安全措施..............................................................................................174.1 接地保护系统...........................................................................................................174.2 洞内电气设备三级配电设置...................................................................................184.3 设置检漏继电器.......................................................................................................194.4 接地与防雷...............................................................................................................194.5 供电系统的“三专、两闭锁”...............................................................................204.6 备用电源..................................................................................................................214.7 电气设备的使用和维护...........................................................................................214.8 电气设备防爆性能的检查与处置..........................................................................
