电气设备与电缆选择规范一、开关的选择(一)一般要求：开关的短路保护应在短路电流对导体和连接件产生的热效应和机械力造成危害之前分断该电流。开关的过负载保护应在过负载电流引起的导体温升对导体的绝缘、接头、端子或周围的物质造成危害之前分断该过负载电流。(二)短路保护应满足的条件：1.分断能力不应小于保护电器安装处的预期短路电流。2.应在短路电流使导体达到允许的极限温度之前分断该短路电流。3.保护电动机时必须满足电动机的启动电流。(三)过负载保护应满足的条件：1.保护电动机时应在电动机电流超过额定电流时间在电动机使用寿命造成严重影响之前分断电动机电源。2.对于突然断电比过负载造成的损失更大的线路，如消防水泵之类的负荷，其过负载保护应作用于信号而不应作用于切断电路。(四)接地故障保护：1.当发生带电导体与外露可导电部分、装置外可导电部分、PE线、PEN线、大地等之间的接地故障时，保护电器必须自动切断该故障电路，以防止人身间接电击、电气火灾等事故。(五)常用电动机的额定参数表：Y系列型号额定功率额定电流转速堵转转矩堵转电流最大转矩重量额定转矩额定电流额定转矩kWAr/min倍倍倍kgY80M1-20.751.828302.26.52.317Y80M2-21.12.528302.27.02.318Y90S-21.53.428402.27.02.322Y90L-22.24.828402.27.02.325Y100L-236.428802.27.02.334Y112M-248.228902.27.02.3451Y132S1-25.511.129002.07.02.367Y132S2-27.51529002.07.02.372Y160M1-21121.829302.07.02.3115Y160M2-21529.429302.07.02.3125Y160L-218.535.529302.07.02.2145Y180M-22242.229402.07.02.2173Y200L1-23056.929502.07.02.2232Y200L2-23769.829502.07.02.2250Y225M-2458429702.07.02.2312Y250M-25510329702.07.02.2387Y80M1-40.551.513902.46.02.317Y80M2-40.75213902.36.02.317Y90S-41.12.714002.36.52.325Y90L-41.53.714002.36.52.326Y100L1-42.2514302.27.02.334Y100L2-436.814302.27.02.335Y112M-448.814402.27.02.347Y132S-45.511.614402.27.02.368Y132M-47.515.414402.27.02.379Y160M-41122.614602.27.02.3122Y160L-41530.314602.27.02.3142Y180M-418.535.914702.07.02.2174Y180L-42242.514702.07.02.2192Y200L-43056.814702.07.02.2253Y225S-43770.414801.97.02.2294Y225M-44584.214801.97.02.2327Y250M-45510314802.07.02.2381Y90S-60.752.39102.05.52.221Y90L-61.13.29102.05.52.224Y100L-61.549402.06.02.235Y112M-62.25.69402.06.02.245Y132S-637.29602.06.52.266Y132M1-649.49602.06.52.275Y132M2-65.512.69602.06.52.285Y160M-67.5179702.06.52.0116Y160L-61124.69702.06.52.0139Y180M-61531.49701.86.52.0182Y200L1-618.537.79701.86.52.0228Y200L2-62244.69801.86.52.0246Y225M-63059.59801.76.52.0294Y250M-637729801.86.52.0395Y280S-64585.49801.86.52.05052Y280M-6551049801.86.52.056Y132S-82.25.87102.05.52.066Y132M-837.77102.05.52.076Y160M1-849.97202.06.02.0105Y160M2-85.513.37202.06.02.0115Y160L-87.517.77202.05.52.0140Y180L-81124.87301.76.02.0180Y200L-81534.17301.86.02.0228Y225S-818.541.37301.76.02.0265Y225M-82247.67301.86.02.0296Y250M-830637301.86.02.0391Y280S-83778.27401.86.02.0500Y280M-84593.27401.86.02.0562Y315S-8551147401.66.52.0875Y2系列型号额定功率额定电流转速最大转矩堵转转矩堵转电流额定转矩额定转矩额定电流kWAr/min倍倍倍Y2-63M1-20.180.528202.22.25.5Y2-63M2-20.250.728202.2.2.25.5Y2-71M1-20.371.028202.22.26.1Y2-71M2-20.551.428202.32.26.1Y2-80M1-20.751.828302.32.26.1Y2-80M2-21.12.628302.32.27.0Y2-90S-21.53.428402.32.27.0Y2-90L-22.24.928402.32.27.0Y2-100L-236.328802.32.27.5Y2-112M-248.128902.32.27.5Y2-132S1-25.511.029002.32.27.5Y2-132S2-27.514.929002.32.27.5Y2-160M1-21121.329302.32.27.5Y2-160M2-21538.829302.32.27.5Y2-160L-218.534.729302.32.27.5Y2-180M-22241.029402.32.07.5Y2-200L1-23055.529502.32.07.5Y2-200L2-23767.929502.32.07.5Y2-225M-24582.329602.32.07.5Y2-250M-2551...
