煤礦整定值計(jì)算說(shuō)明書(shū)

目 錄、K1點(diǎn)選擇在高壓開(kāi)關(guān)進(jìn)線端 2\l“_TOC_250001“二、K2點(diǎn)選擇在500kVA變壓器出線端...............................三、K3點(diǎn)選擇在100kVA變壓器出線端...............................\l“_TOC_250000“、K4〔9111采面配電點(diǎn)〕 3五、K5點(diǎn)選擇在絞車房............................................六、K6點(diǎn)選擇在9112－2回風(fēng)巷掘進(jìn)工作面配電點(diǎn)....................七、K7點(diǎn)選擇在+968m三連運(yùn)輸巷掘進(jìn)工作面配電點(diǎn)...................八、K8點(diǎn)選擇在+971m三連回風(fēng)巷掘進(jìn)工作面配電點(diǎn)...................九、K9點(diǎn)選擇在9112－2回風(fēng)巷掘進(jìn)工作面?zhèn)溆镁稚扰潆婞c(diǎn)............十、K10點(diǎn)選擇在水泵房配電點(diǎn).....................................十一、三專線路計(jì)算...............................................井下開(kāi)關(guān)過(guò)流整定計(jì)算................................................一、9111配電點(diǎn) 錯(cuò)誤!未定義書(shū)簽。二、9112－2配電點(diǎn)整定計(jì)算.......................................三、+968m三連運(yùn)輸巷配電點(diǎn)整定計(jì)算...............................、+971m三連回風(fēng)巷配電點(diǎn)整定計(jì)算 錯(cuò)誤!未定義書(shū)簽。五、絞車房整定計(jì)算...............................................六、水泵房整定計(jì)算...............................................七、局扇供電線路整定計(jì)算.........................................八、井下主變電所饋電開(kāi)關(guān)電流整定計(jì)算.............................十、高壓開(kāi)關(guān)整定計(jì)算.............................................地面變電所整定值計(jì)算十、高壓開(kāi)關(guān)整定計(jì)算.............................................地面變電所整定值計(jì)算................................................一、編制依據(jù).....................................................二、最大運(yùn)行方式短路電流計(jì)算.....................................三、地面高壓保護(hù)裝置整定計(jì)算.....................................治理制度............................................................井下供電系統(tǒng)兩相短路電流計(jì)算+971m9112－29111+968m關(guān)額定短路容量：25kA。一、K1點(diǎn)選擇在高壓開(kāi)關(guān)進(jìn)線端1：電源系統(tǒng)電抗U2X=aU

=102/433=0.23094ΩSy SS〔Ss=1.732×25×10000=433MVA〕235mm2高壓電纜查表得Ro=0.616Ω/km，Xo=0.084Ω/km，可計(jì)算出：Xw=XoL=0.084×1.1=0.0924Ω1Rw=RoL=0.616×1.1=0.6776Ω13:短路回路總阻抗Rw2Rw2(X1SYXW1)20.677620.230940.09224：K1

點(diǎn)兩相短路電流UI2=aU

10000 23= =6660A I3= I2=7691A32Z20.7508二、K2500kVA高壓側(cè)系統(tǒng)電抗、電纜阻抗折算到變壓器二次側(cè)：UX,=(Xsy+Xw)×(2

690)2=〔0.23094+0.0924〕×( )2＝0.0015ΩW1 1 U1

10000UR,=R×(2

690)2=0.6776×( )2＝0.0032ΩW1 W1 U1

10000變壓器后的總阻抗：RT=0.0078Ω,XT=0.0433Ω,500kVAZ=(Rw1,RT)2(X W1

X )2 =0.046ΩTK2U 690 2I2=aU = =7500A I3= I2=8660A2Z20.046 3三、K3100kVA高壓側(cè)系統(tǒng)電抗、電纜阻抗折算到變壓器二次側(cè)：UX,=(Xsy+Xw)×(2

690)2=〔0.23094+0.0924〕×( )2＝0.0015ΩW1 1 U1

10000UR,=R×(2

690)2=0.6776×( )2＝0.0032ΩW1 W1 U1

10000變壓器后的總阻抗：RT=0.0096Ω,XT=0.047Ω,100kVA(Rw(Rw1,RT)2(XW1,XT)2K3UI2=aU

690 23= =7340A I3= I2=8476A32Z20.047四、K4〔9111〕電纜截面：95mm2，L=400m，電壓U=690V。干線電纜電阻電抗：X=XoL=0.076×0.4=0.0304ΩWR=RoL=0.195×0.4=0.078ΩW

,+RT+R

+RH=0.089ΩW1 W∑X=X,+XT+X

=0.0752ΩW1 WZ=R2X2 =0.1165Ω

UaU =2961A2Z五、K5電纜截面：35mm2，L=350m，電壓U=690V。干線電纜電阻電抗：X=X0L=0.084×0.35=0.0294ΩWR=R0L=0.522×0.35=0.1827ΩW

,+RT+R

+RH=0.1937ΩW1 W∑X=X,+XT+X

=0.0742ΩW1 WR2X2

UaU =1725A2Z六、K6點(diǎn)選擇在9112－2回風(fēng)巷掘進(jìn)工作面配電點(diǎn)電纜截面：95mm2，L=400m，U=690V。干線電纜電阻電抗：X=XoL=0.076×0.4=0.0304ΩWR=RoL=0.195×0.4=0.078ΩW

,+RT+R

+RH=0.089ΩW1 W∑X=X,+XT+X

=0.0752ΩW1 WZ=R2X2 =0.1165Ω

UaU =2961A2Z七、K7點(diǎn)選擇在+968m三連運(yùn)輸巷掘進(jìn)工作面配電點(diǎn)電纜截面：16mm2L=50m，U=690V.干線電纜電阻電抗：X=X0L=0.09×0.05=0.0045ΩWR=R0L=1.16×0.05=0.058ΩW

,+RT+R

+RH=0.069ΩW1 W∑X=X,+XT+X

=0.0493ΩW1 WR2X2I2=U2ZaU=4313A+968m電纜截面：16mm2，電纜長(zhǎng)度L=50m，電壓U=690V.干線電纜電阻電抗：X=X0L=0.09×0.05=0.0045ΩWR=R0L=1.16×0.05=0.058ΩW短路回路阻抗：∑R=R,+RT+R+RH=0.069ΩW1 W∑X=X,+XT+X=0.0493ΩW1 WZ=R2X2 =0.08Ω

UaU =4313A2Z八、K8點(diǎn)選擇在+971m三連回風(fēng)巷掘進(jìn)工作面配電點(diǎn)電纜截面：16mm2L=50m，U=690V.干線電纜電阻電抗：X=X0L=0.09×0.05=0.0045ΩWR=R0L=1.16×0.05=0.058ΩW

,+RT+R

+RH=0.069ΩW1 W∑X=X

,+XT+X

=0.0493ΩW1 WZ=Z=R2X2 =0.08ΩI2=U2ZaU=4313A+971m電纜截面：16mm2，電纜長(zhǎng)度L=160m，電壓U=690V.干線電纜電阻電抗：X=X0L=0.09×0.16=0.0144ΩWR=R0L=1.16×0.16=0.1856ΩW短路回路阻抗：∑R=R,+RT+R+RH=0.1966ΩW1 W∑X=X,+XT+X=0.0592ΩW1 WR2X2

UaU =1683A2Z九、K9點(diǎn)選擇在9112－2回風(fēng)巷掘進(jìn)工作面?zhèn)溆镁稚扰潆婞c(diǎn)電纜截面：16mm2L=800m，U=690V.干線電纜電阻電抗：X=X0L=0.09×0.8=0.072ΩWR=R0L=1.16×0.8=0.928ΩW短路回路阻抗：∑R=R短路回路阻抗：∑R=R,+RT+R+RH=0.939ΩW1 ∑X=X,+XT+X=0.1168ΩW1 Z=R2X2 =0.94ΩU2ZaU=367A十、K10點(diǎn)選擇在水泵房配電點(diǎn)電纜截面：16mm2，電纜長(zhǎng)度L=400m，電壓U=690V.干線電纜電阻電抗：X=X0L=0.09×0.4=0.036ΩR=R0L=1.16×0.4=0.464Ω

,+RT+R

+RH=0.475ΩW1 W∑X=X,+XT+X

=0.0808ΩW1 WR2X2

UaU =716A2Z十一、三專線路計(jì)算K1191122電纜截面：16mm2，電纜長(zhǎng)度L=800m，電壓U=690V.干線電纜電阻電抗：X干線電纜電阻電抗：X=X0L=0.09×0.8=0.072ΩWR=R0L=1.16×0.8=0.928ΩW短路回路阻抗：∑R=R,+RT+R+RH=1.056ΩW1 W∑X=X,+XT+X=0.1145ΩW1 WZ=R2X2 =1.06ΩK11：I2=U2ZaU=325A+968m電纜截面：16mm2，電纜長(zhǎng)度L=50m，電壓U=690V.干線電纜電阻電抗：X=X0L=0.09×0.05=0.0045ΩWR=R0L=1.16×0.05=0.058ΩW

,+RT+R

+RH=0.0708ΩW1 W∑X=X

,+XT+X

=0.047ΩW1 WR2X2

UaU =4059A2Z+971m電纜截面：16mm2，電纜長(zhǎng)度L=160m，電壓U=690V.干線電纜電阻電抗：X=X0L=0.09×0.16=0.0144ΩWR=R0L=1.16×0.16=0.1856ΩW

,+RT+R

+RH=0.1984ΩW1 W∑X=X,+XT+X

=0.0569Ω

W1 WX2 =0.207Ω

UaU =1667A2Z井下開(kāi)關(guān)過(guò)流整定計(jì)算30kWK=1.1COS?=0.85Ue=690V；局部線路串聯(lián)有多個(gè)饋電開(kāi)關(guān)，為避開(kāi)越級(jí)跳閘，計(jì)算值為未級(jí)開(kāi)關(guān)動(dòng)作值，上級(jí)開(kāi)關(guān)為下1.05一、9111負(fù)荷計(jì)算：乳化泵功率37kW，2臺(tái)；皮帶機(jī)2×37kW，1臺(tái)；煤電鉆綜保3臺(tái)3.6KW；截2：37＋30＋40+74+30+5.5+3.6=220.1kW9111=37304074305.53.6=216.67A K=1.230.690.851.2×216.67=260AId=260×6=1560A9111260A91112×37kW，140KW，1：37＋74+5.5=116.5kW116.5= =114.69A K=1.230.690.851.2×114.69=137.628A140AId=140×6=840A乳化泵開(kāi)關(guān)的整定計(jì)算37330.690.851.2×36=43A=3730.69=3730.690.85=36AK=1.21.2×36=43A皮帶機(jī)開(kāi)關(guān)確定整定值為45A9111-2=4030.690.85=39.38AK=1.21.2×39.38=47.25A調(diào)度絞車開(kāi)關(guān)確定整定值為50A91125.5330.690.851.1×5.41=5.96A91126A.91125.5330.690.851.2×5.41=6.492A7A.Id=7×6=42A91113130＋40+30+3.6=103.6kW.103.6= =102A K=1.230.690.851.2×102=122.4A125AId=125×6=750A9111〔2〕30330.690.851.2×29.53=35.44A911135A9111〔2〕30330.690.851.2×29.53=35.44A911135A91119111〔1〕=4030.690.85=39.38AK=1.21.2×39.38=47.25A9111工作面轉(zhuǎn)載刮板機(jī)開(kāi)關(guān)確定整定值為50A9111〔3〕=1.230.1270.85=6.4AK=1.11.1×6.4=7.06A9111工作面煤電鉆綜保低壓側(cè)確定整定值為7.5A二、9112－237kW，1：17kW＋37kW=54kW9112－254330.690.851.2×53.16=63.8A65A。Id=65×6=390A9112－29112－2皮帶機(jī)整定值計(jì)算=3730.690.85=36.42AK=1.21.2×36.42=43.7A45A。9112－2耙荒機(jī)開(kāi)關(guān)整定值計(jì)算=1730.690.85=16.74AK=1.11.1×16.74=18.41A18A。三、+968m負(fù)荷計(jì)算：耙荒機(jī)17kW，1臺(tái),長(zhǎng)時(shí)工作負(fù)荷：17kW。+968m17330.690.851.2×16.74=20.08A20A。Id=20×6=120A+968m17= =16.74A K=1.130.690.851.1×16.74=18.41A18A。四、+971m17kW,1.2KW。長(zhǎng)時(shí)工作負(fù)荷：17+1.2＝18.2kW。+971m18.2= =17.92A K=1.230.690.851.2×17.92=21.5A22A。Id=22×6=132A+971m17330.690.851.1×16.74=18.41A+971m18A。+971m1.2= =6.42A K=1.130.1270.851.1×6.42=7.05A7.5A。五、絞車房整定計(jì)算3KW7.5KW55+3+7.5=65.5kW絞車房分開(kāi)關(guān)65.5= =64.48A K=1.230.690.851.2×64.48=77.376AId=80×6=480A由于承受雙回路供電所以兩路電源分開(kāi)關(guān)整定值一樣。絞車電機(jī)開(kāi)關(guān)整定計(jì)算55330.690.851.2×54.14=64.97A絞車電機(jī)開(kāi)關(guān)確定整定值為65A。絞車油泵電機(jī)整定〔2絞車油泵電機(jī)整定〔2臺(tái)〕=330.690.85=2.95AK=1.11.1×2.95=3.245A絞車油泵電機(jī)確定整定值為5.5A。擋車攔開(kāi)關(guān)整定計(jì)算=7.530.690.85=7.38AK=1.11.1×7.38=8.118A擋車攔開(kāi)關(guān)確定整定值為8.5A。六、水泵房整定計(jì)算2KW：15+2=17kW水泵房分開(kāi)關(guān)17330.690.851.2×16.74=20A由于承受雙回路供電所以兩路電源分開(kāi)關(guān)和聯(lián)絡(luò)整定值一樣。水泵整定值計(jì)算〔3臺(tái)〕=由于承受雙回路供電所以兩路電源分開(kāi)關(guān)和聯(lián)絡(luò)整定值一樣。水泵整定值計(jì)算〔3臺(tái)〕=1530.690.85=14.77AK=1.11.1×14.77=16.24A水泵開(kāi)關(guān)確定整定值為18A。信號(hào)照明綜保的整定=230.1270.85=10.7AK=1.11.1×10.7=11.77A七、局扇供電線路整定計(jì)算+968m負(fù)荷計(jì)算：5.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：5.5KW×2=11kW+968m〔2〕11330.690.851.2×10.83=13A13A，Id=13×6=78A局扇開(kāi)關(guān)整定值計(jì)算〔2〕5.5= =5.41A K=1.130.690.851.1×5.41=5.951A6A，由于主、備用局扇參數(shù)全都所以開(kāi)關(guān)整定值一樣。+971m負(fù)荷計(jì)算：5.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：5.5KW×2=11kW+971m〔2〕330.690.85= =10.83A K=1.21.2×10.83=13A13A，Id=13×6=78A局扇開(kāi)關(guān)整定值計(jì)算〔2〕5.5=30.690.85=5.41A 1.1×5.41=5.951A6A，由于主、備用局扇參數(shù)全都所以開(kāi)關(guān)整定值一樣。9112－2：7.5KW×2=15kW9112－2〔2〕15= =14.77A K=1.230.690.851.2×14.77=17.72A18A，Id=18×6=108A由于承受雙電源供電所以兩路電源分開(kāi)關(guān)整定值一樣。局扇開(kāi)關(guān)整定值計(jì)算〔2臺(tái)〕7.5330.690.851.1×7.38=8.12A8.5A，由于主、備用局扇參數(shù)全都所以開(kāi)關(guān)整定值一樣。八、井下主變電所饋電開(kāi)關(guān)電流整定計(jì)算荷。低壓一回/二回總開(kāi)關(guān)負(fù)荷計(jì)算：9111220.1KW、9112－254KW、+968m65.5KW、信號(hào)照明1KW?？傌?fù)荷為：220.1+54+17+18.2+17+65.5+1＝392.8KW392.8= =386.7AK=1.230.690.85不參加備用局扇計(jì)算由于取至備用電源工作時(shí)掘進(jìn)工作面無(wú)法送電，負(fù)荷率更低。465AId=465×6=2790A一回旁路開(kāi)關(guān)、9112－254KW、+968m工作面17KW+971m三連回風(fēng)巷掘進(jìn)工作面18.2KW、信號(hào)照明綜保1KW合計(jì)：17+65.5+54+17+18.2+1＝172.7172.7330.690.851.2×170=204Id=205×6=1230A二回旁路開(kāi)關(guān)65.5KW、9111220.1KW1KW17+65.5+220.1+1＝303.6303.6= =298.87A K=1.230.690.851.2×298.87=358.65AId=360×6=2160A聯(lián)絡(luò)開(kāi)關(guān)360A。Id=360×6=2160A絞車一回開(kāi)關(guān)3KW7.5KW55+3+7.5=65.5kW65.5= =64.48A K=1.2530.690.851.25×64.48=80.6AId=85×6=510A絞車二回開(kāi)關(guān)3KW7.5KW55+3+7.5=65.5kW65.5= =64.48A K=1.2530.690.851.25×64.48=80.6AId=85×6=510A水泵一回開(kāi)關(guān)負(fù)荷計(jì)算：水泵15KW三臺(tái),信號(hào)照明綜保2KW一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：15+2=17kW17330.690.851.25×16.74=20.925AId=22×6=132A水泵二回開(kāi)關(guān)負(fù)荷計(jì)算：水泵15KW三臺(tái),信號(hào)照明綜保2KW一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：15+2=17kW17= =16.74A K=1.2530.690.851.25×16.74=20.925AId=22×6=132A91111負(fù)荷計(jì)算：乳化泵功率37kW，2臺(tái)；皮帶機(jī)2×37kW，1臺(tái)；煤電鉆綜保3臺(tái)3.6KW；截2：37＋30＋40+74+30+5.5+3.6=220.1kW30.690.85=373040743030.690.851.25×216.67=270.8AId=270×6=1620A9112－217kW，137kW，1：17kW＋37kW=54kW==5430.690.85=53.16 K=1.31.3×53.16=69.108A9112－2動(dòng)力電源開(kāi)關(guān)確定整定值為70A；Id=70×6=420A下級(jí)饋電開(kāi)關(guān)為1.25×53.16=66.45A確定為68A。Id=68×6=408A+968m三連運(yùn)輸巷動(dòng)力電源開(kāi)關(guān)負(fù)荷計(jì)算：耙荒機(jī)17kW，1臺(tái),長(zhǎng)時(shí)工作負(fù)荷：17kW。=1730.690.85=16.74A K=1.251.25×16.74=20.925A22A。Id=22×6=132A+971m17kW,1.2KW。長(zhǎng)時(shí)工作負(fù)荷：17+1.2＝18.2kW。18.2330.690.851.25×17.92=22.4A+971m+971m25A。Id=25×6=150A9112－2備用局扇電源開(kāi)關(guān)負(fù)荷計(jì)算：7.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：7.5KW×2=15kW=1530.690.85=14.77AK=1.251.25×14.77=18.4625A20A。Id=20×6=120A+968m負(fù)荷計(jì)算：5.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：5.5KW×2=11kW11330.690.851.25×10.83=13.538A15A。Id=15×6=90A+971m負(fù)荷計(jì)算：5.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：5.5KW×2=11kW1111=30.690.85=10.83AK=1.251.25×10.83=13.538A+971m三連回風(fēng)巷備用局扇電源開(kāi)關(guān)確定整定值為15A。Id=15×6=90A信號(hào)照明綜保〔2臺(tái)〕負(fù)荷計(jì)算：1kW=130.1270.85=5.35AK=1.21.2×5.35=6.42A7A。九、三專供電線路整定計(jì)算三專電源總開(kāi)關(guān)負(fù)荷計(jì)算：5.5KW×2兩臺(tái)，7.5KW×2一臺(tái)；長(zhǎng)時(shí)工作負(fù)荷：11+11+15＝37KW37330.690.851.2×36.42=43.7A三專電源旁路開(kāi)關(guān)負(fù)荷計(jì)算：5.5KW×2兩臺(tái)，7.5KW×2三專電源旁路開(kāi)關(guān)負(fù)荷計(jì)算：5.5KW×2兩臺(tái)，7.5KW×2一臺(tái)；長(zhǎng)時(shí)工作負(fù)荷：11+11+15＝37KW=3730.690.85=36.42AK=1.21.2×36.42=43.7A三專電源旁路開(kāi)關(guān)確定整定值為45A。Id=45×6=270A9112－2局扇電源開(kāi)關(guān)負(fù)荷計(jì)算：7.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：7.5KW×2=15kW15330.690.851.25×14.77=18.4625A20A。Id=20×6=120A+968m負(fù)荷計(jì)算：5.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：5.5KW×2=11kW11330.690.851.25×10.83=13.538A+968m+968m三連運(yùn)輸巷局扇電源開(kāi)關(guān)確定整定值為15A。Id=15×6=90A+971m三連回風(fēng)巷局扇電源開(kāi)關(guān)負(fù)荷計(jì)算：5.5KW×2一臺(tái)。長(zhǎng)時(shí)工作負(fù)荷：5.5KW×2=11kW11=30.690.85=10.83AK=1.251.25×10.83=13.538A+971m三連回風(fēng)巷局扇電源開(kāi)關(guān)確定整定值為15A。Id=15×6=90A十、高壓開(kāi)關(guān)整定計(jì)算微電腦智能高壓保護(hù)裝置，依據(jù)IZ＝1.1Ie過(guò)載整定。1#變壓器 Iz＝28.87×1.1＝31.757A確定為32A Id=32×6=192A2#變壓器 確定為32A Id=32×6=192A3#變壓器 確定為6.5A Id=6.5×6=39A聯(lián)絡(luò)開(kāi)關(guān)由于聯(lián)絡(luò)開(kāi)關(guān)在供電故障時(shí)能帶全部負(fù)荷，所以依據(jù)總開(kāi)關(guān)進(jìn)展整定聯(lián)絡(luò)開(kāi)關(guān)由于聯(lián)絡(luò)開(kāi)關(guān)在供電故障時(shí)能帶全部負(fù)荷，所以依據(jù)總開(kāi)關(guān)進(jìn)展整定31.757+6.347=38.104A38.5AId=38.5×6=231A1段入井總開(kāi)關(guān)Iz＝31.757+6.347=38.104A38.5AId=38.5×6=231A2段入井總開(kāi)關(guān)Iz＝31.757+6.347=38.104A38.5AId=38.5×6=231A由微電腦智能高壓保護(hù)裝置反時(shí)限1檔保護(hù)。地面變電所整定值計(jì)算一、編制依據(jù)1、依據(jù)我礦技改初步設(shè)計(jì)方案中地面供電系統(tǒng)進(jìn)展〔和實(shí)際施工全都；2、按電力系統(tǒng)短路電流計(jì)算相關(guān)原則進(jìn)展；10kVI10kVIIId1、d2、d3、d4、d5d6點(diǎn)三相和兩相短路電流；510KV，100MVA二、最大運(yùn)行方式短路電流計(jì)算d1系統(tǒng)阻抗je電源系統(tǒng)阻抗為：1.2架空線路〔10KV〕阻抗5kmLGJ-70je電源系統(tǒng)阻抗為：1.2架空線路〔10KV〕阻抗5kmLGJ-700.368Ω/km，則線路阻抗為：1.3d11.4d1d12.d2d1點(diǎn)短路電流和d2點(diǎn)短路電流計(jì)算只差母排阻抗，由于較小可以無(wú)視，所2400A2760A。d3架空線路〔10KV〕阻抗1kmLGJ-350.38Ω/km，則線路阻抗為：d1d44.1變壓器阻抗計(jì)算4.1變壓器阻抗計(jì)算0.315MVA4%，則變壓器阻抗：4.2d44.3d4d45.d55.1變壓器阻抗計(jì)算0.2MVA4%，則變壓器阻抗：5.2d5d6入井高壓電纜阻抗0.616Ω/km，則線路阻抗為：d66.3d66.3d6d6最大運(yùn)行方式下I段設(shè)備線路與II段對(duì)稱所以對(duì)應(yīng)點(diǎn)短路電流均相近，不1058.4KW，615.4KW。三、地面高壓保護(hù)裝置整定計(jì)算1、高壓進(jìn)線柜的整定礦井井工作負(fù)荷為：1058.4KW＞71.9A。電流速斷保護(hù)：機(jī)，110KW承受變頻啟動(dòng)，變頻器故障為星三角，起動(dòng)電流反響到高壓側(cè)為：110000100001.7320.8564.42A

322.4A560A，礦井其它工作負(fù)荷電

n104.10.17630 0.5315A。進(jìn)線柜主保護(hù)區(qū)靈敏度以上整定值為一次側(cè)高壓值。折算為二次側(cè)為：I I

sb.r

71.9 2.4A

sb.r2 K 30iI I 315sb.r 10.5A2、至井下線路保護(hù)工作負(fù)荷為：615.4KW

sb.r2 K 30i＞41.8A。電流速斷保護(hù)：按躲過(guò)最大設(shè)備起動(dòng)電流加其余設(shè)備的額定電流之和計(jì)算。礦井最大設(shè)備為絞55車，55KW101.7320.85518.7A，壓側(cè)啟動(dòng)最大電流為272A線路其它工作負(fù)荷電流為：38.07A

n68.180.1630 0.4252A。主保護(hù)區(qū)靈敏度后備保護(hù)區(qū)靈敏度以上整定值為一次側(cè)高壓值。折算為二次側(cè)為：I I

sb.r

41.8 1.67A

K 25iI I 252sb.r 10.08A3、地面變壓器開(kāi)關(guān)柜地面工作負(fù)荷為：297KW