1 11 KV Metering Unit(Ground Mounted) 11KV 计量装置(地面安装) Specification Type Description ESCOM’s Requirements Yes /No System and Environmental Parameters 系统和环境参数 Rated system frequency r.m.s phase-phase voltage 系统在额定频率下 r.m.s 相相电压 11kV±6% System frequency 系统频率 50Hz±2.5% Ambient temperature range 环境温度 -5℃ to + 45 ℃ Altitude: metres above sea level 海拔 1800 Relative humidity 相对湿度 95% Ins