YB3三相异步电动机样本单行本

佳木斯电动机股份有限公司技术文件0EE.138.183-2008YB3系列隔爆型三相异步电动机（机座号80〜355）

产品样本2008-11-10实施2008-11-102008-11-10实施佳木斯电动机股份有限公司发布

佳木斯电动机股份有限公司发布YB3系列隔爆型三相异步电动机（机座号YB3系列隔爆型三相异步电动机（机座号80〜355mn)i1.概述1.1.节能高效产品YB3系列隔爆型三相异步电动机是我公司自行开发的高效节能产品。效率指标符合GB18613-2006《中小型三相异步电动机能效限定值及能效等级》中的“电动机节能评价值”中的2级效率的规定；效率水平相当于欧洲EFF1高效电动机，并满足美国能源法规定的电动机应符合 EPAC效率指标要求的规定。本系列电动机按照GB3836.1《爆炸性气体环境用电气设备 第1部分：通用要求》和GB3836.2《爆炸性气体环境用电气设备 第2部分：隔爆型“d”》的规定制成隔爆型，防爆标志为 Exdl、ExdllAT4、ExdllBT4、ExdIICT4，适用于含有温度组别为T1、T2、T3、T4的爆炸性气体混合物场所。 用于驱动水泵、风机、压缩机等机械设备，为石油、化工、煤矿、冶金等行业的优选产品。为了保护地球环境，请选用YB3为了保护地球环境，请选用YB3系列电动机。1.2.节能效益YB3系列电动机的开发，符合当今世界减排、节能的发展方向，选用YB3系列电动机具有较大的经济效益和社会效益。在分析电动机的费用时，典型的运行时间是平均每年 4000小时，运行十年。购买、安装和服务、维护的费用全部加在一起，约为总费用的3%运行费用几乎全部是电能费用， 却超过总费用的97%。如果能够在电能费用上得到节约，那么， 只要电动机在运行就是节约的。尽管电动机的购置费用稍高，但可以在一年以内回收。然而上述计算不能单纯只看它的经济价值。 电动机消耗了工业用电能的60%,一项研究表明，驱动系统的节约潜力 一大约是20000MW.h/每年，它相当于八个燃煤电站的出力；不仅如此,还要排放1100万吨的碳氧化物。这意味着，环境保护也受益于每台节能电动机。

YB3系列电动机的效率平均比YB2系列电动机高出1%-2%具体见图1,高出部分的效率节约的电能费用要远远超出所增加的费用。与YB2系列电动机相比，采用YB3电动机所增加的费用可从节约的电费中回收，在回收期以后节约的运行费用为净收入，每年节约的电能见图 2，回收期见图3。IIYB3■YB2与YB2系列电动机相比，采用YB3电动机所增加的费用可从节约的电费中回收， 在回收期以后节约的运行费用为净收入，每年节约的电能见图 3,回收期见图3。600055005000450060005500500045004000350030002500200015001000口每年节能值(kW-h)22kW30kW37kW45kW55kW75kW90kW回收期可按下式计算:P2YB21aYB315212P2YB21aYB315212110.894 0.9180.65744hT—回收期(h)C—选用本系列电动机增加的费用（元）a—电能的价格，（1千瓦•时=0.65元）nYB2—效率（％）nYB3—YB3标准效率（％）P2—电动机输出功率（kW）以上可见电动机在744h以内为回收期，回收期过后节约的运行费用即为净收入。电动机型号含义电动机产品型号的组成及含义举例如下:YB3 160L-4-W环境代号F1-户内防中等腐蚀型F2-户内防强腐蚀型WF1户外防中等腐蚀型WF2户外防强腐蚀型TH-湿热带TA-干热带G-咼原极数机座长度（S表示短机座、M俵示中机座、L表示长机座）中心高第三次设计隔爆型异步电动机

YB3电动机功率等级与安装尺寸的关系见表1表1机座号同步转速，r/min300015001000750600功率，kW80M10.750.550.370.18一80M21.10.750.550.2590S1.51.10.750.3790L2.21.51.10.55100L132.21.50.75100L231.1112M442.21.5132S15.55.532.2132S27.5132M1-7.543132M25.5160M111117.54160M2155.5160L18.515117.5180M2218.5--180L-221511200L1303018.515200L23722225S-37-18.5225M45453022250M55553730280S75754537280M90905545315S110110755545315M132132907555315L11601601109075315L220020013211090355S1185)(185)160132(90)355S2(200)(200)355M1220220185160110355M2250250200132355L1280280220185160355L2315315250200185引用标准GB156-2007标准电压GB/755-2000旋转电动机定额和性能(idtIEC60034-1:1996)GB/T755.2-2003旋转电动机(牵引电动机除外)确定损耗和效率的试验方法(IEC60034-2:1972)GB/T997-2008旋转电动机结构型式、安装型式及接线盒位置的分类(IM代码)(IEC60034-7:2001)GB1971-2006旋转电动机线端标志与旋转方向(IEC60034-8:2002)GB/T1993-1993旋转电动机冷却方法(IC代码)GB3836.1-2000爆炸性气体环境用电气设备第1部分：通用要求(eqvIEC60079-0:1998 )GB3836.2-2000爆炸性气体环境用电器设备 第2部分：隔爆型“d”(eqvIEC60079-1:1990 )GB/T4772.1-1999旋转电动机尺寸和输出功率等级 第1部分：机座号56〜400和凸缘号55〜1080(IEC60072-1:1991)GB/T4942.1-2006旋转电动机整体结构的防护等级(IP代码)分级(IEC60034-5:2000)GB10068-2000轴中心高为56mm及以上电动机的机械振动 振动的测量、评定及限值(idtIEC60034-14:1996)GB10069.3-2006旋转电动机噪声测定方法及限值 第3部分：噪声限值(IEC60034-9:1988)GB11021电气绝缘的耐热性评定和分级GB18613-2006中小型三相异步电动机能效限定值及能效等级JB/T8158-1999电压为660V及以下单速笼型三相异步电动机的起动性能IEC60034-12：2002旋转电动机第12部分：单速三相笼型异步电动机起动性能IEC60085电气绝缘耐热性分级工作条件5.1温度：环境空气温度随季节而变化，但最高不超过 +35C(煤矿井下)或+40C(工厂)，环境空气最低温度为-15°C;海拔：不超过1000m；注：当环境空气温度、海拔与上述规定不同时按 GB755规定；5.3湿度：最湿月月平均最高相对湿度为 90%同时该月月平均最低温度不高于 25C(工厂)，煤矿井下最大相对湿度不超过95%；额定频率：50Hz；额定电压：220V、380V、220V/380V、660V、380/660V注：对频率、电压、环境空气温度、海拔等有特殊要求时，请在订货时提出。5.6工作制：S1,连续工作制。结构特点6.1电动机主接线盒位于机座的顶部，可以左右旋转满足用户不同出线方式的要求。6.2机座号H160及以上电机设注排油装置，可以根据用户需要提供定子测温装置、轴承测温装置、加热器装置。接线盒、机座、端盖和风罩的外形美观、样式新颖，并且有利于降噪和通风。6.4电动机采用F级绝缘，温升按B级考核。

6.5电动机冷却方式为IC411，外壳防护等级为IP55。适用于各种应用场合口：“W、“TH'、“WTH、“F1”、“F2”、“WF1及“WF2，其中：W为户外防轻腐蚀；TH为湿热；WT为户外湿热；F1为户内防中等防腐；F2为户内防强腐蚀；WF伪户外防中等腐蚀；WF为户外防强腐蚀。6.7安装结构型式U2L?L3L1L5CHqU2L?L3L1L5CHqO—V*OoLI?L13图4 接线指示图6.9轴承6.9.1 轴承型号见表3表3轴承型号型号轴伸端非轴伸端YB3806304-2RZ/C36304-2RZ/C3YB3906305-2RZ/C36305-2RZ/C3YB31006306-2RZ/C36306-2RZ/C3YB31126306-2RZ/C36306-2RZ/C3YB31326308-2RZ/C36308-2RZ/C3YB31606309/C36309/C3

表3（续）轴承型号YB31806311/C36311/C3YB32006312/C36312/C3YB32256313/C36313/C3YB32506314/C36314/C3YB3280(2P)6314/C36314/C3YB3280(4〜-8P)6317/C36317/C3YB3315(2P)6317/C36317/C3YB3315(4〜10P)NU319/C36319/C3YB3355(2P)NU317/C36317/C3YB3355(4〜10P)NU320/C36320/C36.9.2最大径向力（对皮带轮传动系统）最大径向力：径向负载的最大允许径向力 Fo（单位：N是基于以下前提条件而言的，即负载力的作用线（即皮带轮的中心）必须在自由轴伸的长度以内 （长度为X），长度X（mm是从轴肩到F力作用线之间的距离。因此，长度Xmax就是轴伸的总长度，50Hz情况下的最大径向力，基本结构型式见表 4。表450Hz情况下的最大径向力对照表型号径向力，N2P4P6P8PX=0X=maxX=0X=maxX=0X=maxX=0X=maxYB380485400625515735605815675YB390725605920775109091012301030YB31001030840131010601550125017201400YB31121010830127010401520124016901380YB313214901180194015302260178025001980YB316015401210204015902330182026602080YB318020001550235019502800225030502500YB320025502100335027503900320041503450YB322530502550375029504550360048503900YB325036502950440036005350435057004700YB32803350280087007200108008900119009850YB331539503350990081001210099001330010900YB33554250375010300900013000110001440012000

电动机结构示意图结构示意图见图5〜7图。1—密封圈2—端盖3—轴承 4 —接线盒5—定子6 —转子 7 —接地牌8 —波形弹簧片9 —风罩10 —风扇图5YB380〜132结构剖面示意图1—密封圈2-轴承外盖36—轴承内盖7-接线盒811—转子12-轴承测温接线盒13图6YB3160〜280—挡油环 4—轴承5—端盖-定子测温接线盒 9-接地牌10—定子—波形弹簧片 14—风罩15—风扇结构剖面示意图1—密封圈 2—轴承外盖 3—挡油环 4—轴承5—端盖6—轴承内盖7—接线盒 8-定子测温接线盒 9-接地牌10—定子11—转子 12—轴承测温接线盒 13—波形弹簧片 14—风罩15—风扇图7YB3315〜355结构剖面示意图技术数据380V/50HZ产品性能数据见表5。表5产品型号额定功率kW额定转速r/min额定电流A堵转电流效率%功率因数cos©额定转矩N•m堵转转矩j—_*额定转矩最大转矩转动惯量2kgm噪声净重kg声压级dB(A)额定电流额定转矩空载负载同步转 速3000r/min(2P)YB380M1-20.7528501.787.077.50.832.40.0010676933YB380M2-21.128522.4182.80.843.50.001334YB390S-21.528663.2384.14.80.0020646638YB390L-22.228684.6085.60.857.02.30.002640YB3100L-2328926.0586.70.879.50.0036687054YB3112M-2429147.8987.612.70.0068697165YB3132S1-25.5292210.888.60.8817.50.0126727484YB3132S2-27.5292514.589.523.90.014590YB3160M1-211295221.090.535.02.00.0480132YB3160M2-215295428.17.591.30.8947.72.40.05697880140YB3160L-218.5295534.591.858.90.0640150YB3180M-222296440.392.270.02.30.09828183237YB3200L1-230296954.692.995.52.40.161270YB3200L2-23761.093.30.90117.80.1918486294YB3225M-245297481.193.7143.20.271415YB3250M-25598.894.0175.12.30.3388183471YB3280S-2752977133.994.6238.70.6478284630YB3280M-2902978158.295.0286.50.765687YB3315S-21102982193.4350.11.35883.585.51067YB3315M-21322984231.10.91420.21.4991207YB3315L1-21602987280.1509.31.81.69786.588.51246YB3315L2-2200350.195.4636.61.9231315YB3355S1-2(185)2988323.87.4588.92.22.31787891472YB3355S2-2(200)346.3636.62.3171472YB3355M1-22202989380.595.5700.32.6701550YB3355M2-22502990432.40.92795.81.62.67090921550YB3355L1-2280482.795.8891.03.1411741YB3355L2-23152991543.110033.7701880注：带()为不推存的规格。

产品型号额定功率kW额定转速r/min额定电流A堵转电流效率%功率因数cos©额定转矩N-m堵转转矩最大转矩额定转矩转动惯量kgm2噪声净重kg声压级dB（A）额定电流额定转矩空载负载同步转 速1500r/min(4P)YB380M1-40.5514201.397.080.70.753.50.0019586334YB380M2-40.7514251.8382.30.764.82.30.002335YB390S-41.114292.6083.80.777.00.0031535837YB390L-41.514313.4485.00.789.50.004139YB3100L1-42.214404.7886.40.8114.00.0099566156YB3100L2-4314426.3687.40.8219.10.013160YB3112M-4414578.4088.325.50.0160576271YB3132S-45.5146411.389.20.8335.02.40.0339636890YB3132M-47.5146615.190.10.8447.70.0424100YB3160M-411147421.991.070.02.00.09176772137YB3160L-415147629.37.591.895.50.11871148YB3180M-418.535.992.20.85117.82.30.1646872230YB3180L-422147742.592.6140.10.177250YB3200L-430148056.993.20.86191.00.2887175281YB3225S-43769.193.6235.50.5367377355YB3225M-445148583.793.9286.52.40.61376384YB3250M-455102.094.20.87350.10.7587174488YB3280S-4751490138.494.7477.51.5447477707YB3280M-490165.595.0572.92.504805YB3315S-41101491199.10.88700.33.12280.583.51087YB3315M-4132238.9840.33.4931204YB3315L1-4160286.495.410191.93.96984.587.51270YB3315L2-4200357.90.8912734.6571370YB3355S1-4(185)1492331.17.411782.24.98085881520YB3355S2-4(200)357.912735.3461562YB3355M1-4220388.995.514016.0051640YB3355M2-42501493442.00.9015911.86.51888911696YB3355L1-4280493.595.817827.3231874YB3355L2-43151494555.120058.2021977注：带（）为不推存的规格。

产品型号额定功率kW额定转速r/min额定电流A堵转电流效率%功率因数cos©额定转矩N-m堵转转矩最大转矩额定转矩转动惯量kgm2噪声净重kg声压级dB（A）额定电流额定转矩空载负载同步转 速I1000r/min(6P)YB380M1-60.379261.2863.00.703.51.90.0021546132YB380M2-60.559281.546.575.40.725.30.003135YB390S-60.759332.0477.77.22.10.0043495635YB390L-61.12.8779.90.7310.50.005837YB3100L-61.59363.736.881.50.7514.30.0109536055YB3112M-62.29595.2883.421.00.0150576467YB3132S-637.0784.90.7628.60.034180YB3132M1-649749.2986.138.20.0410616887YB3132M2-65.512.57.087.40.7752.52.40.052995YB3160M-67.597816.789.071.60.10572128YB3160L-61197923.990.00.78105.00.13865150YB3180L-61598331.091.00.81143.22.02.10.22071234YB3200L1-618.598538.091.5176.70.349236YB3200L2-62243.892.00.83210.10.3996874275YB3225M-63098758.792.50.84286.52.40.653355YB3250M-63798870.393.0353.30.9416672464YB3280S-64599185.193.5429.71.6306873645YB3280M-655992103.693.80.86525.22.21.868715YB3315S-675993140.77.294.2716.23.6571050YB3315M-690168.394.5859.44.14972.577.51161YB3315L1-6110204.610505.0631250YB3315L2-6132994242.70.8712605.97776.51334YB3355S-6160290.815282.011.6401595YB3355M1-6185336.395.0176712.5131650YB3355M2-6200363.50.8819101.913.38679831697YB3355L1-6220995399.9210115.1321882YB3355L2-6250454.4238716.8781982注：带（）为不推存的规格。

产品型号额定功率kW额定转速r/min额定电流A堵转电流效率%功率因数cos©额定转矩N-m堵转转矩最大转矩转动惯量kgm2噪声净重kg声压级dB（A）额定电流额定转矩额定转矩空载负载同步转 速750r/min(8P)YB380M1-80.186500.863.352.00.612.61.90.0027526029YB380M2-80.251.1355.03.70.003230YB390S-80.376701.4463.00.625.30.0043485641YB390L-80.552.0764.00.637.81.80.005544YB3100L1-80.752.404.071.00.6810.42.00.0067515951YB3100L2-81.16903.5173.00.6915.20.009354YB3112M-81.54.4075.020.80.0143536162YB3132S-82.27105.805.579.030.00.032576589YB3132M-83.07.9081.00.7340.40.05595YB3160M1-84.072010.353.10.067120YB3160M2-85.513.46.083.00.7573.01.90.0946068132YB3160L-87.517.685.098.12.20.134155YB3180L-81173024.987.00.76143.90.2586270221YB3200L-81533.789.0196.20.410280YB3225S-818.540.06.590.00.78238.82.00.6206572330YB3225M-82246.690.5283.90.670350YB3250M-83063.491.0387.21.91.120472YB3280S-83777.86.091.50.79477.51.3006673580YB3280M-84594.092.0580.71.60072630YB3315S-855740111.292.80.81709.84.850884YB3315M-875150.593.5967.96.00070761000YB3315L1-890177.893.81161.51.82.06.9001100YB3315L2-8110216.9941420.07.8001250YB3355S-81322606.50.821703.511.8001850YB3355M-816031594.22059.311.80078831950YB3355L1-81857423642381.114.8002055YB3355L2-820038794.50.832574.117.4002209注：带（）为不推存的规格。

产品型号额定功率kW额定转速r/min额定电流A堵转电流额定电流效率%功率因数cos©额定转矩N-m堵转转矩额定转矩最大转矩额定转矩转动惯量kgm2噪声声压级dB（A）净重kg空载负载同 步 转 速1600r/min (10P)YB3315S-104559099.66.091.50.75728.41.52.04.9007077850YB3315M-105512192.0890.35.600950YB3315L1-107516292.50.761214.07.0001223YB3315L2-109019193.00.771456.87.8001280YB3355S-10(90)59319193.010.001730YB3355M1-101102305.593.20.781771.51.311.20088951800YB3355M2-1013227593.52125.812.400941870YB3355L-101603332576.716.2002148YB3355L-1018538517.4002250注：带（）为不推存的规格。YB3系列电动机安装及外形尺寸a）机座带底脚、端盖上无凸缘的电动机数据见表 6;外形尺寸图见图8〜图10。表6机座带底脚、端盖上无凸缘的电动机数据单位：mm型号安 装 尺 寸 及 公 差外 形 尺 寸ABBCCDEFGGDHKAAABACADAD1BA1BA2BBBLHAHDHELLDW基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差YB380M125110015501519+0.009-0.00440±0.36-0—-0.03015.5~0—-0.106800-0.510+0.360401651721—1883030P130541032017432614470YB3900.036200-0.207904118017855(1555014330177375156YB390L125180400YB3100L160114018632.028602410012+0.43042200214404018552.5357191445175.5YB3112M19020701125024022335351805116377199486181YB3132S21632.58938+0.018+0.0028010338132552642622105656：200451842022153621475YB3132M178(240561YB3160M254210301083.042110120-0.0433716015703243222416060(2704322475245667261YB3160L254314707YB3180M27924135121481442.591803493622607070311515265742274YB3180L279349762YB3200L31813053013355+0.030+0.01116491020019+0.5207239040327625612274366552558830085129893YB3225M(2P)356131139.51494.022575431460300100100(3803428638325881293YB3225S(4P)28660140±0.5185311355886323YB3225M(4〜8P)3111380911YB3250M(2P)4063493516825024804864983253204205230713334960360116YB3250M(4〜8P)6558YB3280S(2P)457368321902800-1.08554256036095100(4383635773393105C370YB3280M(2P)419'490108CYB3280S(4〜8P)36875200-0.05267.51214381050YB3280M(4〜8P)4194901080YB3315S(2P)5084065521665180-0.043581131528120630630385370140150155037389404971226393144YB3315M(2P)4572406801356YB3315L(2P)508YB3315S(4〜10P)40680170220-0.05271141505501307423YB3315M(4〜10P)4572406801437YB3315L(4〜10P)508YB3355S(2P)61050079254751402067.512355140740720430140260710165210205371445410YB3355M(2P)560YB3355L(2P)6308401575YB3355S(4〜10P)50095+0.035+0.0131702586147101491440YB3355M(4〜10P)560YB3355L(4〜10P)6308401621图11YB380〜132结构示意图表7机座带底脚、端盖上有凸缘（带通孔）的电动机数据单位：mm安装尺寸及公差外形尺寸型号CDEFGNPRSTHKABBC基本极限基本极限基本极限基本极限基本极限GDM基本极限基本极限基本极限基本极限n基本极限基本极限AAABACADAD11BA1BA213BBLHA|HDHELLDW尺寸偏差尺寸偏差尺寸偏差尺寸偏差尺寸偏差尺寸偏差尺寸偏差尺寸偏差尺寸偏差尺寸偏差尺寸偏差YB380M12510050194060-0.03015.50-0.1063.580401651723013()5410P320174326144YB390S140155615245020165130200±1.5|129010+0.360411801783055155*5014330177375156YB390L125+0.009-0.00487+0.014-0.01118818(40070YB3100L16018632860024215180250+0.43010042200214—4040185i52.5357191445175.5YB3112M19014020702.0±2.01541121250240223353518()511637719£486181YB3132S216巾a8938801033265230300413255264262565620(4518420221536214YB3132M17832.5±0.38+0.4324(561YB3160M2542103010842+0.0181237+0.0161600324322241210606027(47524566726175YB3160L254+0.002300250-0.0133500-0.5157031'4322707YB3180M279241351213.0481101442.59±3.0180349362260707031515265742274YB3180L2790-0.120349762YB3200L3183053013355164910350300±0.0164002007239040327612274366i5525P58830C851298YB3225M(2P)31101925638(88129393YB3225S(4P)35628639.5149-0.043400350±0.01845019522575431460300355i3428|638325886323YB3225M(4〜8P)311605310010038(911YB3250M(2P)4063493516818112508048649832542()523071333496036(YB3250M(4〜8P)00YB3280S(2P)3686558-0.20500450±0.02055024320438105(116YB3280M(2P)45741932190140280855425603609510049(3635773393108(370YB3280S(4〜8P)3687520067.512+0.52438105(YB3280M(4〜8P)419+0.030+0.011-0.052049(108(YB3315S(2P)4064.0+0.5215055(1226YB3315M(2P)45765±0.5180-0.0435811±4.08024068(1356393YB3315L(2P)50850855216600550±0.0226603151206306303851403738940497YB3315S(4〜10P)40615055(1307YB3315M(4〜10P)]45780170227114-1.024068(1437423YB3315L(4〜10P)508246028370144YB3355S(2P)500-0.15071(1445YB3355M(2P)56075140200-0.05267.51241(YB3355L(2P)63079254740680±0.02580035514074072043014084(1652102'1575YB3355S(4〜10P)61050026071()53/1491YB3355M(4〜10P)56095+0.035+0.01317025861444(YB3355L(4〜10P)63084(1621端盖上有凸缘（带通孔）的电动机数据见表 端盖上有凸缘（带通孔）的电动机数据见表 8，外形c）卧式安装或立式安装，机座不带底脚、尺寸图见图14〜图16。图14YB380〜132外形及安装尺寸图单位：mm型号尺及公尺DEFGGDMNPRSTnACADAD1HEHFHGLL1LALDW基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差YB380M19406-0-0.03015.5~0-0.1063.5「172174340240326P356156YB390S24+0.009-0.0045020165130+0.014-0.011200±1.512178174331243375(40512156YB390L87+0.430188400430YB3100L2860024215180250214一19138225744548014175.5，70YB3112M-0.036±2.0154223199417265486521181YB3132S388010332652303004262221472288536r57114214YB3132M±0.38561(596YB3160M42+0.0181237+0.016322241210245533315667727261YB3160L+0.002300250-0.0133507077671875YB3180M481101442.59±3.0362260265568355742792274YB3180L0-0.120762812YB3200L55164910350300±0.016400403276309603398851[90117298YB3225M(2P)0256881194129393YB3225S(4P)-0.043400350±0.01845019546030033472042388694620323YB3225M(4〜8P)6053911971YB3250M(2P)18114983253537384639601020360YB3250M(4〜8P)00YB3280S(2P)6558-0.20500450±0.020550320105C1120116YB3280M(2P)140560360393900493108C1150366YB3280S(4〜8P)7520067.512+0.5210501120YB3280M(4〜8P)+0.030+0.011-0.05201080115022YB3315S(2P)12261306YB3315M(2P)65±0.5180-0.0435811±4.0813561436393YB331