采区供电设计范例

第八章5-6首采区供电一、原始资料；1.矿井属煤与瓦斯突出型矿井，地质条件较恶劣，工作面的支护采用掩护式支架。2．采区垂高250m，分四阶段布置，5-6采区为首采区，一段布置一个首采工作面，即5606S1段首采工作面，工作面长度820m。3．采煤工作面：炮采落煤，机械运输，工作面顺槽安装SGB-40T型刮板输送机和SPB-650型胶带输送机各一套；-300m石门安装SGB-40T型刮板输送机一套；4．掘进工作面：风锤打眼，放炮掘进，安装XYP-17型耙斗装岩机机械装矸,用蓄电池机车运至阶段卸矸点，自溜至采区矸石仓。5．采区轨道上山安装JTPB-1.2×1.2型电气调速型防爆绞车一台用作采区设备、材料的提升；安装RJY22－30/550型架空人车，作为人员上班。6．掘进工作面采用安装FBD№6.0型局部扇风机进行通风。7．5-6采区变电所、绞车房分别安装ZBZ-2.5/660型照明综合保护装置提供照明电源。二、采区变电所位置的确定根据煤矿井下供电设计规范对采区变电所位置的相关要求，5-6区变电所设于-500m水平南运输大巷和-500m石门之间。变电所硐室顶板必须稳固、无淋水，通风良好，设备运输便利。三、供电系统的拟定5606S1段首采工作面、5-6采区轨道上山提升绞车和架空人车、-300m皮带的电源取自-250m水平六采区变电所，即4-6区变电所。在4-6变电所增设PBG-6高压开关一台和一台动力变压器。从4-6区变电所新增的动力变压器低压端馈出660V低压动力电源四趟，一趟向首采区工作面提供电源，一趟向-300m皮带机提供电源，一趟向临时排水泵房提供电源；另一趟向5-6采区轨道上山提升绞车和架空人车提供电源。后期5-6采区变电所形成后，5-6采区变电所6kV双回路高压电源取自-500m水平充电硐室，5-6采区变电所设计五台PG9L系列高压防爆开关，两台用作变电所6kV高压进线开关，一台作为联络开关，另两台分别控制风机、动力变压器。从5-6采区变电所馈出660V低压动力电源九趟，其中两趟向5606N2段、5406S2段工作面提供电源、三趟分别向三个掘进工作面机械设备提供电源，三趟分别向三个掘进工作面通风机提供专用电源，另一趟向-500m水平皮带机提供电源。四、负荷统计与变压器容量的选择（一）4-6区变电所1、需用系数和加权平均功率因数的确定(1）需用系数分组1：Kde=0.286+0.714=0.286+0.714×=0.46分组2:Kde=0.7分组3:Kde=0.6分组4:Kde=0.8(2)各组计算负荷分组1：Pca=KdeΣPN=0.46×160.5=73.83kVA分组2:Pca=KdeΣPN=0.7×52.5=36.75kVA分组3:Pca=KdeΣPN=0.6×77.5=46.5kVA分组4:Pca=KdeΣPN=0.8×24.5=19.6kVA(3)加权平均功率因数取变压器的加权平均功率因数为0.7。2、变电所负荷统计表14-6变电所负荷统计分组编号用电设备名称规格型号台数电动机成组负荷计算变压器负荷计算额定功率额定电压额定电流启动电流需用系数加权平均功率因数额定负荷计算负荷同时系数加权平均功率因素计算负荷台kwVAAKdekwkwKsKva1乳化液泵XRB25/25023766042.3253.80.460.7160.573.8310.7176.68刮板输送机SGB-40T型22×406602×45.7274.2胶带运输机SPB-65012266025.2151.2回柱绞车JHA-827.56608.651.6电煤钻ZMS-1544×1.56604×1.710.2小水泵QBK20-35-15/2025.56606.337.8照明综控ZBZ-2.5/66012.56602.917.42-300m皮带DTⅡ(A)8063·214566051.53090.70.752.536.75回柱绞车JHA-827.56608.651.63绞车JTPB1.2×1.2-2417566081.6489.60.60.777.546.5照明综控ZBZ-2.5/66012.56602.917.44水泵MD46-30×312266025.2151.20.80.724.519.6照明综控ZBZ-2.5/66012.56602.917.43、变压器选择（1）变压器型号、台数的确定在4-6区变电所设计安装KBSG系列隔爆干式变压器一台，用作5-6采区5606S1段首采工作面的动力电源。（2）变压器容量选择（1）4-6采变电所安装动力变压器容量计算==252.4kVA根据所选变压器型号和所求变压器计算容量Sca，查相应型号的变压器技术数据:五区变电所动力选择安装一台KBSG-315/6型隔爆干式变压器。（一）5-6采区变电所1、需用系数和加权平均功率因数的确定需用系数分组1：Kde=0.286+0.714=0.286+0.714×=0.456分组2：Kde=0.286+0.714=0.286+0.714×=0.456分组3：Kde=0.286+0.714=0.286+0.714×=0.5分组4:Kde=0.286+0.714=0.286+0.714×=0.5分组5:Kde=0.7分组6:Kde=0.7分组7:Kde=0.7（2）各组计算负荷分组1：Pca=KdeΣPN=0.5×55.5=27.75kVA分组2:Pca=KdeΣPN=0.5×55.5=27.75kVA分组3:Pca=KdeΣPN=0.7×9.5=6.65kVA分组4:Pca=KdeΣPN=0.7×22=15.4kVA分组5:Pca=KdeΣPN=0.7×55=38.5kVA（3）加权平均功率因数取变压器的加权平均功率因数为0.7。2、变电所负荷统计表25-6采区变电所负荷统计分组编号用电设备名称规格型号台数电动机成组负荷计算变压器负荷计算额定功率额定电压额定电流启动电流需用系数加权平均功率因数额定负荷计算负荷同时系数加权平均功率因素计算负荷台kwVAAKdekwkwKsKva1乳化液泵XRB25/25023766042.3253.80.4560.716876.60.850.777.55刮板输送机SGB-40T型22×406602×45.7274.2皮带运输机SPB-65012266025.2151.2回柱绞车JHA-822×7.56608.651.6电煤钻ZMS-1544×1.56604×1.710.2小水泵QBK20-35-15/2025.56606.337.8照明综控ZBZ-2.5/66012.56602.917.42乳化液泵XRB25/25023766042.3253.80.4560.716876.6刮板输送机SGB-40T型22×406602×45.7274.2胶带运输机SPB-65012266025.2151.2回柱绞车JHA-822×7.56608.651.6电煤钻ZMS-1544×1.56604×1.710.2小水泵QBK20-35-15/2025.56606.337.8照明综控ZBZ-2.5/66012.56602.917.43扒斗装岩机ZYP-1711766019.4116.40.50.755.527.75液压锚杆钻机MYT-120C21166012.675.6混凝土喷射机ZP-125.56606.337.8混凝土喷射机机械手PS-1236603.420.4混凝土搅拌机安Ⅳ25.56606.337.8螺旋上料机HPLG-5246604.627.6小水泵QBK20-35-15/2025.56606.337.8探水钻机TXU-75146604.627.64扒斗装岩机ZYP-1711766019.4116.40.50.755.527.75液压锚杆钻机MYT-120C21166012.675.6混凝土喷射机ZP-125.56606.337.8混凝土喷射机机械手PS-1236603.420.4混凝土搅拌机安Ⅳ25.56606.337.8螺旋上料机HPLG-5246604.627.6小水泵QBK20-35-15/2025.56606.337.8探水钻机TXU-75146604.627.65小水泵QBK20-35-15/2025.56606.337.80.70.79.56.65探水钻机TXU-75146604.627.66-500m水平皮带DTⅡ(A)8063·212266025.2151.20.70.72215.47局扇FBD№5.0/11×222×116602×12.62×75.60.70.76646.210.746.2局扇FBD№5.6/11×244×116604×25.22×75.63、变压器选择1．变压器型号、台数的确定砚石台矿属煤与瓦斯突矿井，局部通风机供电必须实行“三专两闭锁”，5-6区变电所设计安装KBSG系列隔爆干式变压器两台，一台用作5-6采区动力电源，一台用作局部通风机专用电源。2．变压器容量选择（1）5-6采区变电所动力变压器容量计算==280.2kVA根据所选变压器型号和所求变压器计算容量Sca，查相应型号的变压器技术数据:5-6采区变电所动力选择安装一台KBSG-315/6型隔爆干式变压器。（2）采区变电所风机变压器容量计算==66kVA矿井地质条件复杂,采区安装设备变化较大,该变电所又将为-500m水平采区服务,根据所选变压器型号和所求变压器计算容量Sca，查相应型号的变压器技术数据:五区变电所风机选择安装一台KBSG-200/6型隔爆干式变压器。五、低压电缆的选择（一）确定电缆的型号和芯线数根据电缆型号的确定原则，选用MYP-0.66/1.14型橡套铜芯电缆。为煤矿用移动屏蔽橡套电缆。（二）电缆长度的确定1.干线电缆长度的确定（1）4-6区变电所至5-6轨道上山绞车房，电缆长度为220米。（2）4-6区变电所至-250m抬高石门，电缆长度为255米（3）-250m抬高石门至-300m皮带机机头电缆长度为100米。（4）-250m抬高石门至电缆长度为715米。（5）4-6区变电所至-300m石门刮板输送机处电缆长度为590米。（6）4-6区变电所至-300m临时水泵房电缆长度为490米。（7）交汇处乳化液泵电缆长度为135米。（8）乳化液泵处皮带运输机处电缆长度为15米。（9）米。电缆长度为70米。电缆长度为30米。（12）电煤钻电采用专用电缆，长度100米。（13）5-6采区变电所至-363m石门刮板输送机处电缆长度为1140米。（14）交汇处乳化液泵电缆长度为135米。（15）交汇处乳化液泵电缆长度为135米。（16）乳化液泵处皮带运输机处电缆长度为15米。（17）乳化液泵处皮带运输机处电缆长度为15米。（18）皮带运输机至电缆长度为850米。（19）皮带运输机至电缆长度为850米。电缆长度为70米。电缆长度为70米。电缆长度为30米。（23）5-6采区变电所至-500m水平皮带运输机，电缆长度为350米。（24）米。（25）1100米。（26）5-6采区变电所至-500石门掘进工作面，电缆长度为200米。2.支线电缆长度的确定所有的设备均采用就地控制，控制开关至设备的支线电缆统一按20m计算。（三）选择低压电缆主芯线截面1.支线电缆截面的选择根据不同的生产机械设备，按照机械强度和允许持续电流选择供电系统中的设备支线电缆如下：（1）回柱机电缆截面16mm2，允许持续电流85A＞9.37A，满足要求。（2）乳化泵电缆截面25mm2，允许持续电流110A＞46.2A，满足要求。（3）5-6采区轨道绞车电缆截面70mm2，允许持续电流205A＞93.7A，满足要求。（4）采煤工作面皮带运输机电缆截面16mm2，允许持续电流85A＞27.5A，满足要求。（5）求。（6要求。（7）求。（8）足要求。（9）混凝土喷射机机械手电缆截面10mm2，允许持续电流63A＞3.7A，满足要求。（10）足要求。（11）（12）小水泵电缆截面10mm2，允许持续电流63A＞6.87A，满足要求。（13）探水钻机电缆截面10mm2，允许持续电流63A＞5A，满足要求。（15）-500m水平皮带机电缆截面25mm2，允许持续电流110A＞27.5A，满足要求。（16）FBD№5.0局扇电缆截面16mm2，允许持续电流85A＞6.87A，满足要求。（17）FBD№5.6局扇电缆截面16mm2，允许持续电流85A＞13.74A，满足要求。（18）电煤钻采用MZ系列专用电缆，截面4mm2，允许持续电流36A＞1.38A，满足要求。2.干线电缆主芯线截面的选择因整个供电系统主要采取干线式供电，所以，按长时允许持续电流选择电缆截面，按允许电压损失校验。（1）按长时允许持续电流选择1）4-6区变电所至5-6轨道上山绞车房，电缆截面为50mm2。以下各干线电缆截面计算同上。2）4-6区变电所至-250m抬高石门，电缆截面为50mm2。3）-250m抬高石门至-300m皮带机机头电缆截面为35mm2。4）5）4-6区变电所至-300m石门刮板输送机处电缆截面为95mm2。6）4-6区变电所至-300m临时排水泵房电缆截面为50mm2。7）交汇处乳化液泵电缆截面为95mm2。8）乳化液泵处皮带运输机处电缆截面为95mm2。9）截面为95mm2。电缆截面为50mm2。电缆截面为35mm2。12）电煤钻电采用专用电缆截面为4mm2。13）5-6采区变电所至-363m石门刮板输送机处电缆截面为95mm2。14）交汇处乳化液泵电缆截面为70mm2。15）交汇处乳化液泵电缆截面为70mm2。16）乳化液泵处皮带运输机处电缆截面为50mm2。17）乳化液泵处皮带运输机处电缆截面为50mm2。18）皮带运输机至电缆截面为50mm2。19）皮带运输机至电缆截面为35mm2。电缆截面为25mm2。电缆截面为25mm2。电缆截面为25mm2。23）5-6采区变电所至-500m水平皮带运输机，电缆截面为35mm2。24）50mm2。25）5-6采区变电所至-426南抽放巷掘进工作面，电缆截面为50mm2。26）5-6采区变电所至-500石门掘进工作面，电缆截面为50mm2。（2）按允许电压损失校验电缆截面1)4-6区变电所至5606N1段采煤工作面干线电缆电压损失校验①总允许电压损失ΔＵp的计算ΔUp=690—0.95×660=63V;②变压器的电压损失ΔUT其中③4-6区变电所至-300m石门刮板输送机处干线电缆电压损失（按支线电压损失计算）Δub1,加权平均值为0.85交汇处乳化液泵电缆电压损失Δub2,加权平均值为0.85⑤乳化液泵处皮带运输机处电缆电压损失Δub3,加权平均值为0.85⑥皮带运输机至电缆电压损失Δub4,加权平均值为0.85⑦电缆电压损失Δub5,加权平均值为0.85⑧电缆电压损失Δub6,加权平均值为0.85计算的电缆线路干线电缆电压损失18.3V＜允许电压损失63-13.2-3.1-0.2-8.7-0.9-0.3-0.3=36.3V，所选干线电缆截面符合要求。2)验①4-6区变电所至5-6采区轨道上山绞车房电缆电压损失Δub1,加权平均值为0.85②5-6采区轨道上山绞车房至绞车电机处电缆电压损失Δub2,加权平均值为0.85计算的电缆线路干线电缆电压损失11.7V＜允许电压损失63-13.2-1.1=48.7V，所选干线电缆截面符合要求。3）4-6区变电所至-250m抬高石门干线电缆电压损失校验①4-6区变电所至-250m抬高石门干线电缆电压损失Δub1,加权平均值为0.85②-250m抬高石门至电缆电压损失Δub2,为0.85③电缆电压损失Δub3,为0.85计算的电缆线路干线电缆电压损失8.9V＜允许电压损失63-13.2-7.5-1.7=40.6V，所选干线电缆截面符合要求。4)5-6采区变电所至5606N2段采煤工作面干线电缆电压损失校验①总允许电压损失ΔＵp的计算ΔUp=690—0.95×660=63V;②5-6采区变电所至-363m石门刮板输送机处干线电缆电压损失（按支线电压损失计算）Δub1,加权平均值为0.85③交汇处乳化液泵电缆电压损失Δub2,加权平均值为0.85乳化液泵处皮带运输机处电缆电压损失Δub3,加权平均值为0.85⑤皮带运输机至电缆电压损失Δub4,加权平均值为0.85⑥电缆电压损失Δub5,加权平均值为0.850.85⑧电缆电压损失Δub7,为0.85计算的电缆线路干线电缆电压损失23V＜允许电压损失63-13.2-3.1-0.2-8.7-0.9-0.3-0.3=36.3V，所选干线电缆截面符合要求。5）5-6采区变电所至-426南抽放巷掘进工作面，电缆电压损失校验（最远一个掘进工作面）①总允许电压损失ΔＵp的计算ΔUp=690—0.95×660=63V;②5-6采区变电所至-426南抽放巷掘进工作面干线电缆电压损失（按支线电压损失计算）Δub1,加权平均值为0.85③支线电缆电压损失Δub1,为0.85（按电机容量最大的支路计算）扒斗装岩机支线：计算的电缆线路干线电缆电压损失23V＜允许电压损失63-13.2-3.7=46.1V，所选干线电缆截面符合要求。6）5-6采区变电所至-500m水平皮带机电缆电压损失校验①总允许电压损失ΔＵp的计算ΔUp=690—0.95×660=63V;②5-6采区变电所至-500m水平皮带机干线电缆电压损失（按支线电压损失计算）Δub1,为0.85③支线电缆电压损失Δub1,为0.85计算的电缆线路干线电缆电压损失7.9V＜允许电压损失63-13.2-0.9=48.9V，所选干线电缆截面符合要求。（四）按起动时的电压损失校验电缆截面该供电系统中，5606N2段工作面运输巷刮板输送机供电距离较远，功率较大。所以，对其进行起动校验。1．确定电动机的最小起动电压2．刮板输送机的起动电流：Ist=Ist.N3．刮板输送机支线电压损失：4．启动器安装处的电压为：U=满足启动器吸持电压的要求。5．启动动时干线的电压损失为：6．起动时，变压器的电压损失：7．启动时，整个低压电网的电压损失为：按起动条件校验电缆截面：8．压。满足启动电压要求六、高压电缆的选择首先按长时允许电流选择，由采区负荷统计表可知，本采区负荷产生的最大长时工作电流为22.2A，总计负荷为230.75kvA，所以线路中的最大长时工作电流为22.2A。故-250m水平三区变电所到五区变电所选用截面为MYJV22–6/10-3×50的交联聚乙烯绝缘聚氯乙烯护套电力电缆。其长时允许电流为243A,大于22.2A。高开与变压器相临、相连且距离非常近，所以变压器进火线也选择相同截面的该种电缆。1.按经济电流密度选择电缆截面：mm²＜50mm²,故电缆截面选择满足要求.2.按允许电压损失选择电缆截面：线路允许电压损失为：故电缆截面选择50mm2满足要求。七、采区低压电网短路电流计算（一）4-6区变电所低压电网，见5606S1首采区供电系统图变压器阻抗计算,高压电缆阻抗计算,设井下中央变电所6kV高压母线上的三相短路容量为50MVA，则系统感抗电抗,,各点的短路电流值见下表：短路点变压器阻抗高压电缆阻抗系统电抗低压电缆阻抗总阻抗二相短路电流三相短路电流电阻电抗电阻电抗电阻电抗电阻电抗S10.01060.060.01360.0020.0095000.02420.07154570.485256.05S20.01060.060.01360.0020.00950.13580.04430.160.11581746.762008.77S30.01060.060.01360.0020.00950.15310.04610.17730.11761621.581864.82S40.01060.060.01360.0020.00950.18410.05610.20830.12761412.241624.08S50.01060.060.01360.0020.00950.187550.057260.211750.128761392.111600.93S60.01060.060.01360.0020.00950.383140.121010.4073350.19251765.76880.62S70.01060.060.01360.0020.00950.4246270.126720.4488270.19822703.15808.62S80.01060.060.01360.0020.00950.4431070.129240.4673070.20074678.33780.08S90.01060.060.01360.0020.00950.1143420.0206550.138540.0921552073.412384.42S100.01060.060.01360.0020.00950.5547820.0806310.5789820.152131576.31662.76S110.01060.060.01360.0020.00950.5821620.0824310.6063630.153931551.47634.2S120.01060.060.01360.0020.00950.1759420.0290550.2001420.1005551540.31771.35S130.01060.060.01360.0020.00950.1932180.0308150.2174180.1023151435.771651.14S140.01060.060.01360.0020.00950.0986480.017820.1228480.089322271.422612.13S150.01060.060.01360.0020.00950.1076160.019440.1318160.090942154.332477.48S160.01060.060.01360.0020.00950.1634330.024420.1876330.095921637.171882.75S170.01060.060.01360.0020.00950.1908130.026220.215010.097221462.061681.37S180.01060.060.01360.0020.00950.2197160.039690.2439160.1111912871480S190.01060.060.01360.0020.00950.2470960.041480.2712960.112981173.941350（二）5-6采区变电所低压电网，见5-6采区变电所供电系统图KBSG-315/6/0.69变压器阻抗计算,KBSG-200/6/0.69变压器阻抗计算,高压电缆阻抗计算,设井下中央变电所6kV高压母线上的三相短路容量为50MVA，则系统感抗电抗,各点的短路电流值见下表：短路点变压器阻抗高压电缆阻抗系统电抗低压电缆阻抗总阻抗二相短路电流三相短路电流电阻电抗电阻电抗电阻电抗电阻电抗S10.01060.060.01360.0020.0095000.02420.07154570.485256.05S20.01060.060.01360.0020.00950.1796070.044460.2038070.115961448.351665.61S30.01060.060.01360.0020.00950.4474420.110760.4716420.18226682.31784.66S40.01060.060.01360.0020.00950.4748220.157020.4990220.22852628.58722.84S50.01060.060.01360.0020.00950.1968830.046220.2210830.117721377.411584.02S60.01060.060.01360.0020.00950.22794650.0563450.25214650.1278451220.351403.41S70.01060.060.01360.0020.00950.2415020.057510.2657020.129011168.041343.25S80.01060.060.01360.0020.00950.4269830.121220.4511830.19272738.48776.25S90.01060.060.01360.0020.00950.4591440.126720.4833440.19822689.86793.33S100.01060.060.01360.0020.00950.4685970.128860.4927970.20036648.53745.81S110.01060.060.01360.0020.00950.089680.01620.113880.08772400.242760.28S120.01060.060.01360.0020.00950.305580.02540.329780.09691003.721154.28S130.01060.060.01360.0020.00950.307820.0258050.332020.097305997.151146.73S140.01060.060.01360.0020.00950.31006050.026210.33426050.09771990.671139.27S150.01060.060.01360.0020.00950.3123050.0266150.33650250.098115984.271131.91S160.01060.060.01360.0020.00950.2355480.026820.2597480.098321242.21428.53S170.01060.060.01360.0020.00950.237790.0272250.261990.0987251232.261417.1S180.01060.060.01360.0020.00950.3190320.027830.3432320.09933965.531110.36S190.01060.060.01360.0020.00950.3212740.0282350.3454740.099735959.451103.36S200.01060.060.01360.0020.00950.493240.08910.517440.1606636.78732.29S210.01060.060.01360.0020.00950.709140.09830.733340.1698458.32527.07S220.01060.060.01360.0020.00950.7113820.0987050.7355820.170205456.94525.48S230.01060.060.01360.0020.00950.7136240.099110.7378240.17061455.57523.91S240.01060.060.01360.0020.00950.7158660.0995150.7400660.171015454.21522.34S250.01060.060.01360.0020.00950.6391080.099720.6633080.17122503.61579.15S260.01060.060.01360.0020.00950.641350.1001250.665550.171625501.96577.25S270.01060.060.01360.0020.00950.7225920.100730.7467920.17223450.16517.68S280.01060.060.01360.0020.00950.7248340.1011350.7490340.172635448.83516.15S290.01060.060.01360.0020.00950.515660.093150.539860.16465611.26702.95S300.01060.060.01360.0020.00950.727560.102350.751760.17385447.12514.19S310.01060.060.01360.0020.00950.7298020.1027550.7540020.174255445.81512.68S320.01060.060.01360.0020.00950.21560.02940.23980.10091326.091525S330.01060.060.01360.0020.00950.242980.03120.267180.10271205.2911386.08S340.02040.0930.01360.0020.0095000.0340.10453139.453610.36S350.02040.0930.01360.0020.00950.12320.01680.15720.12131737.521998.15S360.02040.0930.01360.0020.00950.26010.02580.29410.13031072.521233.4S370.02040.0930.01360.0020.00950.67760.09240.71160.1969467.271233.4S380.02040.0930.01360.0020.00950.81450.10140.84850.2059395.13454.4S390.02040.0930.01360.0020.00950.70840.09660.74240.2011448.54515.83S400.02040.0930.01360.0020.00950.84530.10560.87930.2101381.62438.86八、电气设备的选择1．高压电气设备的选择根据高压配电装置选择条件，4-6区变电所加装一台PBG-200/6Z型矿用防爆型高压真空开关。5-6采区变电所全部采用PJG9L-100/6Y型矿用防爆型高压真空开关。该两类开关均具有短路、过载、失压、漏电和监视保护。额定电压选择6KV合格。额定电流PBG-200/6Z型选择100A，PJG9L-100/6Y型选择100A。4-6区变电所PBG-100/6Z型高压开关的过载保护动作电流为：15.12×1.1=16.63A，过载保护的实际整定值为:17A，0.3倍档大于30A。5-6采区采区变电所PJG9L-100/6Y型高压开关的过载保护动作电流为:22.2χ1.1=24.42A，过载保护的实际整定值为:25A，0.4倍档大于40A。额定断流容量校验：根据断路动稳定校验：其动稳定电流短路热稳定校验：2.低压电气设备选择低压电气设备的选择：馈电开关选用KBZ-200和KBZ-400型真空馈电开关。胶带输送机和刮板输送机选用QBZ-120型真空电磁起动器，回柱机、绞车选用QBZ-80N型真空电磁起动器，其余设备选用QBZ-80型真空电磁起动器。九、保护装置的整定计算（一）4-6区变电所供电系统（5606S1首采区供电系统图）各开关的整定值见下表开关编号开关型号规格负荷额定电流（A)过负荷电流整定(倍数）电动机启动电流(A)短路电流整定（倍数）二相短路电流(A)灵敏度系数结论1KBZ-400327.90.9735.921746.762.18合格2KBZ-20060.10.4317.61.62073.416.48合格3KBZ-400183.50.54121.11746.763.97合格4KBZ-20025.20.2151.20.812878.04合格5KBZ-40086.40.3492.51.32271.424.37合格6KBZ-20060.10.4317.61.6576.311.8合格7KBZ-20054.40.3311.91.61435.774.49合格8QBZ-120/0.6651.50.53092.61435.774.6合格9KBZ-2008.60.151.60.3551.479.19合格10QBZ-80N/0.668.60.251.60.7551.479.85合格11KBZ-200183.514122.1678.331.62合格12QBZ-120/0.6645.70.4274.22.31621.585.88合格13QBZ-120/0.6642.30.4253.82.21412.245.35合格14QBZ-120/0.6642.30.4253.82.21412.245.35合格15QBZ-80/0.6625.20.4151.221392.118.7合格16QBZ-120/0.6645.70.4274.22.3765.762.77合格17QBZ-80/0.666.30.137.80.5703.1517.57合格18QBZ-80N/0.668.60.251.60.7678.3312.11合格19KBZ-40086.40.3492.51.31462.062.81合格20QJZ-200S/0.6681.60.5489.62.52154.334.3合格21KBZ-20027.30.2163.60.91462.068.12合格22QBZ-80/0.6627.30.4163.62.11462.068.1合格23KBZ-20025.20.2151.20.81173.947.34合格24QBZ-80/0.6625.20.4151.221173.947.34合格25QBZ-80/0.6625.20.4151.221173.947.34合格（二）5-6采区变电所供电系统（5-6采区变电所供电系统图）各开关的整定值见下表开关编号开关型号规格负荷额定电流（A)过负荷电流整定(倍数）电动机启动电流(A)短路电流整定（倍数）二相短路电流(A)灵敏度系数结论1KBZ-630530.10.9758.61.34448.665.43合格2KBZ-20025.20.2151.20.81326.098.29合格3KBZ-400183.50.54121.11448.353.29合格4KBZ-400183.50.54121.11448.353.29合格5KBZ-20088.70.5185.712400.2412合格6KBZ-20088.70.5185.71636.783.18合格7KBZ-20023.50.2550.3611.2610.19合格8KBZ-200630.41260.7448.543.2合格9KBZ-20025.20.275.60.41737.5221.72合格10KBZ-20025.20.275.60.4467.275.84合格11KBZ-20012.60.137.80.211.2448.5合格12KBZ-20025.20.2151.20.81205.297.53合格13QBZ-80/0.6625.20.4151.221205.297.53合格14KBZ-20088.70.5185.71984.274.92合格15KBZ-20063.50.4160.50.9984.275.47合格16KBZ-20025.20.288.20.51072.5210.73合格17KBZ-20025.20.288.20.51072.5210.73合格18QBZ-80+80/0.6612.60.275.611072.5213.41合格19QBZ-80/0.666.30.137.80.51003.7225.09合格20QBZ-80/0.664.60.127.60.4997.1531.16合格21QBZ-80/0.666.30.137.80.5990.6724.77合格22QBZ-80/0.663.40.120.40.3984.2740.01合格23QBZ-80/0.6612.60.275.611242.215.53合格24QBZ-80/0.6619.40.3116.41.51232.2610.27合格25QBZ-80/0.666.30.137.80.5965.5324.14合格26QBZ-80/0.664.60.127.60.4959.4529.67合格27KBZ-20088.70.5185.71448.832.24合格28KBZ-20063.50.4160.50.9448.832.49合格29KBZ-20025.20.288.20.5395.133.95合格30KBZ-20025.20.288.20.5395.133.95合格31QBZ-80+80/0.6612.60.275.61395.134.94合格32QBZ-80/0.666.30.137.80.5458.325.73合格33QBZ-80/0.664.60.127.60.4456.9414.28合格34QBZ-80/0.666.30.137.80.5455.5711.39合格35QBZ-80/0.663.40.120.40.3454.2118.93合格36QBZ-80/0.6612.60.275.61503.616.3合格37QBZ-80/0.6619.40.3116.41.5501.964.18合格38QBZ-80/0.666.30.137.80.5450.1611.25合格39QBZ-80/0.664.60.127.60.4448.8314.03合格40KBZ-20023.50.2550.3445.817.43合格41KBZ-20010.90.142.40.3445.817.43合格42KBZ-20012.60.137.80.2381.629.54合格43KBZ-20012.60.137.80.2381.629.54合格44QBZ-80+80/0.666.30.137.80.5381.629.54合格45QBZ-80/0.666.30.137.80.5447.1211.18合格46QBZ-80/0.664.60.127.60.4445.8113.93合格47KBZ-200183.514122.1648.531.54合格48QBZ-120/0.6645.70.4274.22.31377.414.99合格49QBZ-120/0.6642.30.4253.82.21220.354.62合格50QBZ-120/0.6642.30.4253.82.21220.354.62合格51QBZ-80/0.6625.20.4151.221168.047.3合格52QBZ-120/0.6645.70.4274.22.3738.482.68合格53QBZ-80/0.666.30.137