常用电气设备需要系数表(2页)Good is good, but better carries it.精益求精，善益求善。设备名称Kxcostan设备名称Kxcostan宾馆总照明0．35～0.450.850.62实验室及实习工厂0．10～0.200．70～0.800．75～1.02冷冻机房0．65～0.750.800.75绞肉机、磨碎机0.700.800．75锅炉房0．65～0.750.750.88医院（卫生所）电力0．40～0.500.800.75给、排水泵0.800.85 0.62金工、装配、修理用起重机0.05～0.150.501.73厨房电力0.50～0.700.800.75重型工作起动机0.25～0.35洗衣机房电力0.65～0.750.501.73小容量试验设备0.10～0.250.204.90窗式空调器0.70～0.800.800.75电焊机0.350.6～0.71.02～1.33卫生通风机0.65～0.700.800.75单头焊接变压器0.350.352.68生产通风机0.75～0.850.80～0.850.62～0.75多头焊接变压器0.400.352.68电梯0.600.701.02混凝土及砂浆搅拌机0.65～0.700.651.17干烤箱、加热器0.40～0.6010破裂机、筛、泥浆机、砾石洗条机0.700.701.02常用电气设备的需要系数 Kx 及 cos、tan 值1) 用电设备组的计算负荷。有功功率 Pjs =Kx·Ps （KW）无功功率 Qjs = Pjs·tanφ （KV·A）视在功率 Sjs = Pjs/cosφ （KV·A）2) 配电干线的计算负荷。有功功率 Pjs =Kt ∑Kx Ps （KW）无功功率 Qjs = Kt(∑Kx Ps ·tanφ) （KV·A）视在功率 Sjs = (P²js+ Q²js)½ （KV·A）则计算电流为 Ijs= Sjs /√3·VN3) 电力变压器的有功损耗和无功损耗分别为：△PB =0.02 Sjs （KW）△QB =0.08 Sjs （KV·A）红外赶考设备0.85～0.9010施工用起重机、挖土机、升降机0.250.701.024)|】}…【^…、'$、*—;)>?',@^￥|\￥，&!>"
