Calculation Method for Melt Current of Fuse Fuses

时间： 2023-11-24 来源：XC News

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The current of a fuse includes two aspects, one is the rated current of the fuse tube, and the other is the rated current of the melt, which cannot be confused.

1. Melt current for direct starting of a single motor IRNIRN ≥ Iq/K (A)... (l) IRN Melt rated current (A) Iq Motor starting current (A) K-coefficient or IRN=(1.5-2.5) IH (A)... (2) In the formula, IH Motor rated current (A) or 380V (AC) IRN=7PH (A)... (3) 22OV (AC) IRN=12PH (A)... (4) In the formula: PH Motor rated power (kW)

2. Multiple motors in the distribution main line (with several units), with a total fuse IRN=(1.5-2.5) IHmax+I (n-1) (A)... (5) In the formula: IHmax - The rated current of the largest motor or motor group that starts simultaneously I (n-1) - The sum of the rated currents of other motors except for the largest motor group or motor group that starts simultaneously, or IRN=I (n-l)+Iqmax/2.5 (A)... (6) In the formula: Iqmax - The maximum starting current of one motor (A) or IRN=K1 [Iqmax I (n-l)] (A)... (7) In the formula: K1- load factor, usually taken as 0.4, and there are also data introducing that K1 is 0.9-l.

3. Electric lamp main fuse melt IRN=(1.3-1.5 × The rated current of the electricity meter (A)... (8) is securely installed on the output line of the electricity meter.

4. Lamp shunt fuse IRN=working current of all lamps on the shunt (A)... (9) 5. Fuse with control transformer (control circuit) IRN ≥ PH+0.1Pq/U2 (A)... (10) Where: PH - Rated capacity of control transformer (VA) Pq - Starting capacity of the largest electrical attraction coil in the circuit or the sum of several electrical attraction coils simultaneously starting capacity (VA) U2- Secondary voltage of control transformer (V) 6. Fuse without control transformer (control circuit) IRN ≥ 0.4 [IQ+IH (n-1) [(A)... (11) In equation: Iq - the starting current of the largest electrical appliance (or the suction coil that several appliances start simultaneously) in the line (A) IH (n-1) - the sum of the rated currents of the suction coils of other electrical appliances in the line (A) 7. The melt current of the load balancing control circuit IRN ≥ IH (A)... (12) In equation: IH - the sum of the rated currents of all electrical appliances load (A) 8. The selection of high-voltage fuse transformer capacity is below 100kVA, IRN=(2-2.5) × Rated current on the high-voltage side of the transformer (A)... (13) Transformer capacity above 100kVA, IRN=(1.5-2) × Rated current on the high-voltage side of the transformer (A)... (14) 9. Fuse on the low-voltage side of the transformer. The fuse on the low-voltage side of the transformer is set according to the rated current on the low-voltage side, and can also be selected based on the actual load current. For example, the rated current of the transformer is 910A, and the distribution aluminum bar is 80 × 8 (mm2), vertically placed, with an allowable current of 1320A and a temperature correction coefficient of 0.88. The actual allowable current is 1320 × 0.88=1160A, which is higher than the rated current of the transformer and can be selected.

When the current value of the fuse obtained from the above calculation differs from the standard fuse, it can be selected as close to the standard as appropriate. For example, the current on the high-voltage side of the S7-50/10-0.4 transformer is 2.89A, calculated according to equation (13) (2-2.5) 2.89=5.78-8.23 A. The high-voltage fuse standards are 2, 3, 5, 7.5, 10, 15, 20, 30, 40, 50, 75, 100, 150, 200, and 300.

Therefore, 10A high-voltage fuse can be selected.

Fig.1

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目录- Medium Voltage Fuses Introduction E-rated Fuses R-rated Fuses British Standard Dimensioned IEC Fuses for Motor Circuit Protection DIN Dimensioned IEC Fuses Potential Transformer Fuses British Standard IEC Fuses for Oil-Filled Switchgear Fast-Acting Fuses EEI-NEMA Type K&T and Type H&N Fuses BBU Boric Acid Fuses Fuseclips for Medium&High Voltage Fuses

型号- JCL-B-6R,MV155F1DCX65E,225-007-938,225-007-939,ECL155-200E,A055C1DORO-40E,A155C1DORO-40E,MV055F1CAX50E,MV155F1CBX7E,A155C1DORO-65E,JCI-10E,BBU,A055C1DORO-65E,A055C1DORO-300E,225-007-937,AB,AD,JCL-B-5R,AM,ECL055-500E,A055B3DORO-750E,38ADMNA10E,38CAV4E,BBU27-10E,5.5AMWNA,JCR-B-12R,36TFQSJ(AMP),JCG-2R,FL11T80,JCY-15E,JCG-30,BBU27-10K,MV155F1CBX5E,3.6WKFHO,MV055F1DAX10E,BBU38-65SE,JCU-50E,JCL-B-9R,A055X900E-4,3.6ADOSJ(AMP),12OHFMA80/04,JCX-400X,JCY-/2E,JCG-3R,A155C3DORO-250E,7.2AMWNA4.0E,5.5ABWNA,5.5CAV,BBU38-30SE,A055C1DORO-20E,BBU17-20SE,JCX-12E,3.6WFLSJ(AMP),JCL-B-30,JCL-B-2R,3.6WFOSJ(AMP),JCG-4R,MV055F1CAX30E,A155C1DORO-20E,ECL055-65E,MV155F1DBX80E,5.5AMWNA*,38CAV(H)1E*,3.6ADOSJ,12OEFMA63,FL3K200,JCG-5R,7.2AMWNA2.0E,FL3T8,FL3T3,FL3T6,FL3T5,7.2OHGMA140,BBU38-3K,FL3T2,ECL055-40E,JCX-10E,BBU38-50SE,12OEFMA25/01,FL3T1,12TKLEJ,A055C1DORO-125E,JDZ-80E,JCL-B-4R,12OEFMA50,BBU27-30E,BBU27-30K,JCG-6R,BBU17-100E,JCU-300E,3.6ADLSJ(AMP),BBU17-100K,A055C1DORO-100E,MV055F1DAX30E,MV055,JCL-B-3R,MV055F1CAX10E,HVA,JCK-A-24R,HVB,36TFQSJ,BBU17-125E,HVJ,JCZ-15E,7.2OHGMA125,HVL,15.5CAV(H)1E,FL11T20,HVR,HVU,HVT,HVW,A155C1DORO-80E,HVX,MV055F2DAX300E,3.6WDLSJ,A055C1DORO-25E,FL3T200,17.5TDLSJ(AMP)*,BBU38-80K,JCT-1E,12OEFMA25,15.5CAV(H)1E*,BBU27-40SE,FL11T25,5.5AMWNA3.0E,JCK-12R,FL11T12,12OEFMA40,FL11T10,JCY-10E,MV155F1CBX15E,FL11T200,JCG-9R,ECL055,JCX-30E,3.6CAV,JCI-3E,FL11T15,24THMEJ(AMP),12TXLEJ,JCK-B-24R,A055X750E-4,7.2AMWNA0.5E,BBU38-200SE,BBU27-175SE,BBU17-150SE,JCL-18R,JCT-3E,12OEFMA01,12OEFMA03,JCH-12R,BBU17-30K,MV155F1DCX80E,BBU17-30E,BBU38-80E,JCI-5E,7.2OHGMA160,15.5CAV(H)2E,12THLEJ(AMP),FL11T65,BBU27-12K,ECL055-80E,ECL155-150E,ECL055-150E,JCT-5E,ECL055-900E,BBU27-13E,FL11T50,JCX-50E,FL11K200,BBU17-40SE,7.2WFNHO,MV155F1CBX10E,EEI-NEMA,JCK-2R,FL11T40,FL3K6,FL3K8,FL3K3,FL3K2,FL3K5,15.5CAV,FL3K1,3.6WDFHO,24TXMEJ,BBU38-100SE,JCI-12E,5.5AMWNA5.0E,JCK-3R,BBU17-50K,FL11T30,BBU17-50E,BBU27-15K,15.5OLGMA100*,JCK-18R,7.2CAV,12OEFMA63/—,3.6OEGMA,MV055F1DAX15E,5.5VKNHA,17.5TDMEJ,BBU27-15E,5.5CAV15E,BBU38-65E,A055C2DORO-600E,3.6WFFHO,BBU17-15K,BBU38-65K,15.5OLGMA,BBU17-15E,3.6OEFMA80,JCL-2R,JCT-12E,JCL-A-12R,3.6OEFMA160,JCZ-65E,MV155F2DCX125E,BBU27-100SE,FL11K80,JCU-15E,JCW-1E,36ABGNA,BBU17-7E,JCL-3R,FL11K65,17.5TKMEJ(AMP),BBU17-13E,3.6WFLSJ,MV055F2DAX350E,JCZ-40E,BBU27-20SE,JCW-2E,7.2OHGMA160*,BBU38-175E,JCL-4R,BBU38-40E,5.5AMWNA1.0E,BBU17-8K,JCR-B-9R,BBU38-40K,36CAVH,FL11K50,JCX-80E,JCX-250E,FL11K100,MV155F1DBX100E,JCL-B-18R,12OEFMA31.5/02,JCW-3E,JCU-250E,JCW-5E,JCH-18R,17.5TKMEJ,JCR-B-6R,JCL-5R,JCL-24R,JCT-1-1,15.5ABFNA,3.6OEFMA125,BBU27-200SE,BBU17-12K,JCL-6R,17.5TFLSJ,12OLGMA125,JCK-B-9R,38CAV(H)1E,JCL-B-12R,OEFMA,JCR-B-4R,36TDQSJ(AMP),MV155F1DBX15E,ECL155-40E,MV155F2DBX175E,38CAV(H)2E,BBU27-125E,BBU38-25SE,BBU38-20E,JCT-10E,JCR-B-5R,12ABCNA,BBU17-10K,BBU17-10E,7.2ABWNA,ECL155-65E,JCG-12R,JCK-B-6R,12OHGMA05,BBU38-20K,MV155F2DBX150E,FL11K140,BBU27-100K,BBU27-100E,JCY-1E,JCY-3E,JCR-B-2R,JCR-A-18R,JCL-9R,7.2TDLSJ,ECL055-200E,BBU27-5E,JCK-B-5R,12OEFMA50/03,JCD-12E,A155C1DORO-100E,BBU38-25E,3.6OLGMA,JCY-2E,JCR-B-3R,3.6OLGMA250,JCW-1⁄2E,JCX-450X,36TXQEJ(AMP)*,JCG-A-18R,BBU27-6K,JCK-B-4R,JCZ-80E,A155C3DORO-200E,ECL055-20E,JCQ-11⁄2E,JDZ-30E,3.6ABWNA,JCY-5E,BBU27-3K,BBU27-50E,MV155F2DBX200E,JCK-B-3R,JCX-125E,ECL155-20E,FL12K8,BBU27-50K,JCU-10E,3.6ADLSJ,JCK-A,A155C1DORO-15E,JCK-B,JCX-100E,MV055F1DAX50E,3.6OEFMA100,BBU38-175SE,JCK-B-2R,MV155F1DBX10E,15.5CAV(H)0.5E,ECL,JCK-B-30,JCU-125E,5.5ABWNA*,5.5ABWNA0.5E,3.6WDOH6,BBU17-5E,JCY-7E,FL11K40,JCU-100E,JCT-1-1⁄2E,17.5OHGMA,MV055F1CAX15E,JCR-B-18R,ECL055-25E,JCZ-200E,BBU17-6K,ECL155-300E,ECL055-750E,FL11K30,17.5TDMEJ(AMP),JCI-1⁄2E,JCU-450E,MV055F1DAX125E,36TDQSJ,3.6WFOH6,CAV,JCK-A-18R,JDZ-50E,12OHFMA,A3354710,5.5CAVH2E,BBU17-140K,FL11K25,BBU17-3K,FL11K20,BBU27-7E,ECL055-400E,3.6OEFMA63,BBU38-200E,JCU-30E,MV055F1DAX100E,MV155F1DBX30E,JCR-A-12R,BBU38-200K,5.5CAVH1E,JCX-15E,BBU17-15SE,7.2OEFMA,JCL-A-18R,FL11K15,A055C1DORO-150E,ECL155-25E,FL11K12,BBU27-8K,FL11K10,BBU27-140K,15.5OLGMA100,17.5TDLSJ,BBU27-15SE,JCW-12E,BBU17-125SE,A3354730,BBU27-20E,BBU27-20K,12OHGMA100/—,A055C2DORO-450E,JCK-B-18R,24TDMEJ(AMP),JCX-300E,JCQ-2E,A155C2DORO-125E,15.5CAV(H)0.5E*,JCX-25E,12OHGMA100,JCX-325X,ECL155-15E,MV155,A3354745,BBU17-65SE,JCZ-150E,MV055F1DAX25E,JCQ-3E,JCL-A-9R,JCD-1⁄2E,7.2TFLSJ,JCR-B-24R,ECL155-125E,7.2WKMSJ,A055C1DORO-30E,MV055F1CAX40E,A155C1DORO-30E,12OLGMA125*/—,MV055F1CAX65E,MV155F1DBX50E,BBU17-80K,ECL155-100E,JCU-400E,ECL055-50E,JCQ-5E,FL3K140,A055C1DORO-200E,JCT-1-2E,JCL-A-5R,BBU27-40E,JCY-25E,ECL055-600E,BBU27-40K,15.5OHGMA,JCU-80E,MV155F2DCX150E,12OEFMA31.5,JCU-750E,36CAV,12OEFMA,MV055F1DAX20E,12OHFMA04,BBU27-65E,38ADMNA7E,JCH-30,JCL-A-4R,JCH-2R,BBU17-80E,BBU27-65K,BBU17-200E,A155C1DORO-10E,MV055F1CAX20E,BBU27-50SE,BBU17-200K,7.2WKMSJ(AMP),JCQ-/2E,JCH-3R,A055C1DORO-50E,7.2AMWNA3.0E,7.2OHGMA,BBU27-150SE,3.6WDOSJ,BBU38-40SE,38CAV(H)2E*,15.5CAVH*,FL3T140,JCL-A-6R,JCH-4R,FL3K100,MV055F1DAX150E,24CAV,38CAV(H)0.5E,ECL055-30E,JCX-20E,MV055F1DAX175E,JCK-A-12R,JCH-5R,7.2AMWNA1.0E,JCX-65E,3.6WFOSJ,FL3T50,3.

2018/9/19 - EATON BUSSMANN - 选型指南代理服务技术支持批量订货

GRL Provides Fuses, and Fuse Switches in GW155 Wind Turbines

GRL participated in Goldwind‘s 3 million kW wind power poverty alleviation project in Inner Mongolia, China, providing fuses and fuse switches for the GW155-4.5MW wind turbines. The wind power system includes wind turbines, overhead lines, transformers, and grid boxes, with GRL‘s 160A fuse switch disconnector applied to ensure reliable protection. The GW155-4.5MW wind turbine has maintained an availability rate above 99.7%.

2024-11-12 - 应用方案代理服务技术支持批量订货

MTA Supplies Modular Fuse and Relay Boxes to Trucks and Buses for Tata Motors

MTA has been in long-term business association with Tata Motors supporting the company for both passenger car and commercial vehicle business units. In fact, the plant set up in Pune in 2009 was born to serve Tata as major customer. During this last decade, MTA developed many different products thanks to the work done by our sales people in India always in close cooperation with Tata Motors Research ＆ Development team.

2021-02-28 - 原厂动态代理服务技术支持批量订货

NIDEC（尼得科）IMfinity® FFB制动马达（电机）选型指南

目录- Rake motors INTRODUCTION Rake motors CONSTRUCTION Rake motors OPERATION IP 55 Aluminium housing rake motors IP 55 Cast iron housing brake motors Rake motors EQUIPMENT AND OPTIONS Rake motors IDENTIFICATION and INSTALLATION Rake motors APPENDIX

型号- LS 112 M,FLSES 112 MG,FLSES FFB,LSES FFB,FLSES 112 MU,LS 160 LR,LS 180 MT,LSES 160 L,LSES 160 M,FLSES 100,FLSES 132 M,FLSES 90,FLSES 80 L,LS 112 MG,LSES 132 S,LSES 80 LG,LS 90 L,LSES 112 MG,LSES 160 LUR,LS 71 L,FLSES 132 SM,LSES 132 M,LSES 90 L,LSES 80 L,FLSES 160 M,LS 160 MR,LS 160 MP,LS FFB,FLSES 112,FLSES 90 LU,LSES 90 SL,LS 132 M,FLSES 100 LR,LS 80 L,LSES 100 L,LS 71,LSES 132 SM,FLSES 160 LUR,LS 132 S,FFB1,FFB2,FFB3,FFB4,LSES 100 LG,FLSES 160,FFB5,FLSES 160LUR,LSES 160 MU,FLSES 100 LG,LSES 112 MU,LS 71 M,LSES 160 MR,LS 160 M,LS 160 L,FLSES 80 LG,LSES 160 MP,FFB SERIES,LS 100 L,LSES 100 LR,FLSES 90 SL,LSES 90 LU,LSES 132 MU,FLSES 100 L,LS 90 SL,FLSES 132 MR,FLSES 80,LSES 180 MR,FLSES 132

2018.03 - NIDEC - 选型指南代理服务技术支持批量订货

Several Factors Influence the Lifetime of Current Fuses

The lifetime of a current fuse is influenced by several factors. Firstly, the current rating of the fuse plays a crucial role. If a fuse is constantly operating near or at its rated current, it will experience more heat buildup and stress over time, which can shorten its lifetime.

2024-11-06 - 技术探讨代理服务技术支持批量订货

Vicfuse（威可特）跌落式熔断器选型指南

目录- 公司简介 COMPANY PROFILE 跌落式熔断器 Medium Voltage Drop-out Fuses

型号- 12VASL100HWF,24VASL100CW,12VASL100CW,12VASL200HW,V38025R/F,V38040R/F,24VASL200CW,12VASL100CWF,V38008R/F,V38200R/F,V38006R/F,38VASL100CPWG,V38030R/F,12VASL200CW,12VASL50CPW,V38080R/F,24VASL200HW,10VASLCW,38VASL*CXW,VXXXXXXXX,10VASL*CXW,V38015R/F,12VASL100HW,V38020R/F,24VASL100CWF,38VASL200HPWG,24VASL100HW,12VASL200CWF,V38001R/F,38VASLCW,V38003R/F,12VASL200HWF,24VASL100HWF,□VASL□□□□□□□□□,V38140R/F,24VASL200HWF,V38005R/F,V38060R/F,12VASL100CPW,V38050R/F,38VASL100HPWG,V38012R/F,38VASL200CPWG,V38010R/F,24VASL200CWF

03/30/23 - VICFUSE - 选型指南 - V3.0. 代理服务技术支持批量订货

2型保护的电机控制器和保险丝选择

型号- CR324DXH,SG01V02S**,CR324DXG,LC1F185,LC1D09,LC1F500,LRD32,CR234FXM,CR123C131A,CR234FXK,100-C85,SE01V02S,AE16CNSO_C,CR324DXJ,CR123F567B,AE16ENSO_B,AE17FNSO_FT,LC1F630,CL09,CL08,CL07,CR123C778A,LRD40,CL06,CL05,100-C72,CL04,509-B,CL03,509-A,CL02,509-D,CL01,509-C,31T52,CL00,509-F,509-E,193-E**JD,LRD5369,CR324CXG,CR324CXH,CR324CXE,LR2F7579,CR324CXF,CR324CXD,LRD10,AE16ANSO_C,LC1F400,LRD12,LRD07,LRD06,LRD08,CL10,CR123F914B,193-E**GB,R123F104C,SD01V02S,CR123F327B,LRD21,LC1D115,LRD22,SC03V02S,AE17ANSO_FJ,CR123C526A,AE17ANSO_FK,AE17ANSO_FL,CK09,LR2F7581,AE17ANSO_FM,CK08,CL25,LRD14,CR123F719B,LRD16,CR123F395B,AN16GNO_B,193-E**HC,AE17JNSO_KE,LC1F265,AE16LNSO_,193-E**DB,SXLG,CR123C268A,LC1D40,100-C43,AE16JNSO_B,LR2D3355,CR324FXL,LR2D3357,CR324FXM,LR2D3359,CR324FXK,CR123C419A,LC1F150,SB02V02S,AN16KNO,AE17HNSO_KC,193-E**EB,3TF32/42,CR123C366B,AN16SNO_B,CR123C867A,3UA6000-3J,CL45,LR2D3363,CR123C330B,100-C30,100-C37,SXLF,SXLE,CR123C180B,SXLD,193-E**FB,SXLC,SXLB,SXLA,AE16HNSO_B,CR123C379A,3TF31/41,CR123C125B,40 (120.0),AN16NNO_,100-C60,3UA5800-2V,3UA5800-2T,CR123F243B,LC1D25,3UA5200-2B,AN16ANO_C,LR2F5367,3UA5800-2E,LR2F5369,LC1D18,LR2F6577,CR123C356A,CR123C695A,LR2F6575,LR2F6573,LR2F6571,CR123F133C,CR123F658B,LC1D12,LRD3563,LC1D040,100-C09,LRD3561,LRD3560,CR123C466A,LR2F5571,AE16DNSO_C,CR123C955A,CR324HXT,AE17CNSO_FQ,3UA5800-8W,CR324HXS,LC1D80,3TF30/40,LRD3559,3UA6200-2X,CR123F233B,CR123F487B,LRD3555,LRD3557,LC1D050,LR9D5369,LR9D5367,AE16BNSO_C,LC1F115,CR123C104B,CR123C196A,AE16MNSO_,LR2D2353,3UA6600-3E,AN16AN0_C,3UA6000-2X,LC1D065,CR234CXH,3UA6600-3D,3UA6600-3C,3UA6600-3B,AN16BNO_C,3UA5000-1D,CR123C270B,3UA5000-1E,CR324GXQ,CR324GXP,3UA5000-1J,3UA5000-1K,100-C23,3UA5000-1F,3UA5000-1G,LC1D65,3UA5000-1H,LR2F5569,3UA5000-2S,LRD3355,3UA6200-3J,3UA6200-3L,CR123C198B,LC1D50,CR123F440B,100-C12,CR123F614B,LC1D080,100-C16,LRD3361,LR2D1322,LR2D1321,LRD3363,3UA5400-2D,CR123C301A,LC1D125,AE17KNSO_KF,CR123C228B,CR123C163A,AN16NDO_C,CR234DXH,CR123C163B,CK95,CR123F104C,3UA5500-2D,LRD3357,LRD3359,LR2D1316,LR9D5567,LR2D1314,AE16NNSO_,AN16DNO_B,LR2D1312,AE16KNSO_B,LR2D1310,LC1D012,LR9D5569,AN16KNO_,LC1D018,CR123C326A,3UA5400-1K,3UA5400-1J,CR123C273B,3TF54,200,3TF56,AE17BNSO_FP,3TF50,LRD1508,SF01V02S,3UA5400-2B,CR123F430B,LR2D1308,LR2D1307,LR2D1306,CR123F772B,CR123F118C,CR123C109A,CR123C303B,LC1D025,CR123C400B,LR2F8583,CR123C250B,3TF46,193-E**KE,LRD1514,LRD1516,CR123F300B,3TF48,LRD1510,3TF47,LRD1512,LC1D150,LRD1530,LC1D032,3TF34/44,AE17DNSO_FR,CR123F161C,CR123F848B,LRD1521,LRD1522,LRD5569

2019/05/28 - EATON BUSSMANN - 商品及供应商介绍代理服务技术支持批量订货

Common Sense for Fuses

A fuse refers to a self destructing fuse that experiences significant surges or other current exceeding limits in a circuit； In order to protect the components of other parts of the circuit where the fuse is located and the equipment is normal, the cost of replacing the fuse can be ignored compared to replacing the entire circuit that may be damaged. Due to the fact that fuses are a common element that needs to be replaced, we will introduce two basic concepts and provide a more in-depth introduction to fusion applications and testing and diagnostic methods.

2023-11-30 - 技术探讨代理服务技术支持批量订货