◆海拔高度不超过1000m，环境空气温度-40℃~+40℃
◆ 安装场所无剧烈的机械振动、无有害气体及蒸汽、无导电性及爆炸性尘埃
◆连续运行电压1.0Un，长期过电压zui高值不超过1.1Un
◆稳态过电流（包括谐波电流）不超过1.43In
◆zui大允许容量不超过1.35Qn
◇Altitude lower than 1000m, anbiedt temperature-40℃~+40℃
◇No strong mech anical vobration at installing place. No corrosive gas, inductive dust, and inflammabie and explosive media in the anbient entiroment.
◇Continuous operating caltage is 1.0Un. the highest over-valtaeg value for long time operation will not exceed 1.1Un.
◇Steady-state over current（include harmonic current）will not exceed 1.43In.
◇The maxcapacity will not more than 1.35Qn.