Fuses - Cable Joints
FUSESCatalogueABB
CEFCEF-S719CEF-VT23CMF27WBP35WBT43BPS57
IntroductionThe main function of current limiting fuses is to protect electrical apparatus like distribution transformers, motors,capacitor banks against overload currents. The fuses can operate as sole devices or can be combination withair/SF6 insulated switch disconnector. The choice depends on each application requirements and specific networkconditions. One of critical aspects for optimum protection results is proper fuses selection. This can be done basedon theoretical calculation but we see many times practical knowledge coming from real test results could make iteasier and even more reliable. ABB as the company with wide apparatus product portfolio has long time experience in this field. Our current limiting fuses were designed for safety operations in open air and for limited heatdissipation installation like we find in gas insulated switchgears.Fuse selection principles for most common situations are presented on the following pages all together with common definitions. Moreover we offer our support for each specific case where presented criteria are not sufficient.So, before using our products we want to encourage you to read below presented technical definitions and application principles.Main definitionsCurrent limiting back up fusesCurrent limiting fuses family is generally composed of three different fuses groups: back-up fuses, generalpurpose fuses and full range fuses. All of them limit value of prospective short circuits currents during interruption process extending life time of nearby installed electrical equipment. The main difference is in minimum breaking current that characterize lowest fault current that fuses are capable to interrupt. This value isregularly highest for back up fuses, slightly smaller for general purpose and smallest with the value nearbyminimum melting current for full range fuses. But for the protection function reaction time is critical. That iswhy back up fuses having interruption time for their minimum breaking current in the range of few secondsup to few tens of milliseconds are the most common in use. The total clearing time in case of high valueof short circuits currents is even shorter i.e. few ms only. That is why back up fuses can be used as typicaloverload protection element. Whereas general purpose and full range fuses even capable to interrupt smallest values of currents can be considered as over current devices only since the interruption time is 1 hourand more. ABB current limiting fuses have minimum breaking currents at very low level nearby 3xIn.M-effectOne of the structural means used for forming the time-current characteristic of medium voltage fuse linksof CEF and CMF series, manufactured by ABB, is an overload spot located on fuse elements. To create thisoverload spot the M-effect is used. The overload spot is made by coating the silver fuse elements with ashort segment of metal characterized by a low melting point. For the first time the M-effect was describedby professor Metcalf in the 1930s. It consists in taking advantage of the effect of melting by some metalscharacterized by a low melting point (e.g. tin, lead) and being in a liquid state, metals characterized by ahigher melting point (e.g. copper, silver). Silver fuse element coated with a segment of metal a low meltingpoint metal (solder) fuses for current values that would not fuse it if the overload spot were not present. Thereason for it is as follows: During heating of the fuse element with the overload spot, the metal, which theoverload spot is made of, starts melting and diffuses into the metal of the fuse element and thus reducesthe active cross-section of the main silver fuse element. As a result of this silver fuse element is meltedat the moment when the other parts of the fuse element still keep a relatively low temperature. With thisdesign the overload spot enables reduction of the minimum melting current and reduction of the minimumbreaking current. Consequently, the range of correct operation of the fuse link is extended. One must alsoemphasize that in case of short-circuit currents, when fuse elements are heating up very fast and practicallyno heat is dissipated into the surrounding arc-quenching medium (adiabatic heating), the fuse elementsmelt at the constrictions before metal, which the overload spot is made of, reaches its melting temperature.Therefore, the overload spot does not affect the fuses characteristic for short-circuit currents. Additionally,a very important advantage of using the overload spot is the fact that the arc is always initiated at the samepoint on the fuse element, near the geometrical center of the fuse link. This solution prevents the arc frominitializing near one of the end-caps, which could result in damaging of the end-cap by the arc. To sum up,the overload spot enables increase in the useful operational range of the fuse link by extending the rangeof correct operation for small overload currents. Moreover, use of the overload spot prevents the arc frominitializing near one of the fuse link ends and, thus, makes the fuse link safer to use.Fuse-switch combinationBack up fuses are commonly used for fuse-switch combinations both in open air and in gas insulated panels.When fuses operates as protective device incorporated with switch by tripping system we need to considertwo different function of fuses depending on interrupted current value. When fault current is above transfercurrent, fuses simply extend breaking capability of switch disconnector completing interruption operationalways faster than incorporated switch. This happens for fuse clearing time is shorter than total openingtime of LBS. When striker pin pops up fuses have already cleared current and switch opens in almost noload conditions. Other situation is when fault currents are below nominal transfer current. The main role offuses is to activate tripping system of switch by striker pin. In this case interruption process is completed by ABB
switch first preventing fuses from overload in case of low fault current. Fuses that are to be used for fuseswitch combination have to fulfill conditions presented in IEC 62271-105 (former IEC 60420 and IEC 420).Back up fuses are specially designed for such an application. Use of general purpose or full range fuses forfuse switch combination is not reasonable due to coordination principles.General principles for fuse links selectionChoice of rated current InTo obtain the best possible current limitation, and thereby also protection, In must be chosen as low as possible compared to the rated current of the object to be protected. However, the following limitations must betaken into consideration:– the largest load current must not exceed In;– cooling conditions (e.g. in compact switchgear);– inrush current of off load transformers;– starting currents of motor circuits. (See Chapter CMF, special motor fuses).Protection of capacitor banksHRC fuses are normally connected in series with capacitor unit or banks and they are to isolate when unitsbecome faulty under normal operating voltages including transient voltage during energizing of capacitors.That is why the chosen fuse links’ rated voltage should be not less than 1,1 of rated voltage of capacitor unitand rated current of the fuse should be at least 1,43 of capacitor rated current as it recommended in IEC60549. In practice we can distinguish two general cases;Only one capacitor bank connectedSelect rated current In for fuses at least 2 times of rated current Inc of capacitor bank and rated voltage Unhigher than Unc.In 2xIncUn 2xUncExample315 kVAr capacitor bank with 10 kV Unc.Inc 315 18,2 A10 x 3Selected fuses: In 40 A; Un 24 kVMore than one capacitor connected in parallelIncluding possibility of reloading i.e. transmitting from load capacitor bank to unloaded it must be considered that very high transient current may occur.Select In of fuses to be more than 3 times of Inc for capacitor banks. And due to wide variations of transientcurrents may occur it is recommended to consult calculation with supplier of capacitors.Application in SF6 switchgearsCEF fuses were designed in relation to application inside gas insulated switchgears. The coordination offuses with switch disconnector when limited heat dissipation conditions occur is not easy task. This is partof knowledge obtained mainly from many practical tests performed in different loading conditions.First we should define maximum allowed value of power losses for fuses not to exceed temperature riselimits according to referred standard. This results in de-rating of rated current of fuses having power lossesabove this limit to safety level with clear assumption of fuse load factor. All this procedure should be verified by temperature rise and breaking tests and this is ABB standard approach for SF6 switchgear and CEFfuses.For detailed information regarding choice of ABB fuses for transformer protection in SF6 switchgear pleaserefer to switchgear catalogue data.Replacement of melted fuse linksHRC fuse links cannot be regenerated. According to IEC Publication 60282 1 (IEC 282-1), all 3 fuse linksshould be replaced, even if only one of them in three phase system have operated. Exceptions are allowedwhen it can be verified that the fuse link(s) have not experienced any over current.Indicator and striker pinCEF and CMF fuses are equipped with combined indicator- and striker system, which is activated immediately when the fuse element melts. CEF-VT is available with and without striker pin – please refer toordering tables. The force diagram is in accordance with the requirements of IEC 60282-1 (IEC 282-1) andDIN 43625.ABB
The bellow presented striker pin force diagram is valid for CEF/CMF fuses as effective from May 2006.The former version of striker pin was with initial force of 50N.&;. LABOUR SPRING LEAD ,;MM MAX REAL SPRING LEADNameplateSTRIKER - SCHLAGSTIFTThe symbols on the nameplate have the following meaning:IN Rated currentUN Rated voltageI3 Minimum breaking currentI1 Maximum short circuit current for which the fuse is testedThe arrowhead on the nameplate indicates in which end of the fuse link the indicator and striker pin appears. Additionally this end contact of the fuse link is specially marked.CEF-U is outdoor type.Prod. year08-2005CEFIEC 60282-1HV Back-up fuse linkI N 6AU N 12kVI 3 35AI 1 63kAINDOOR - INNENRAUMStriker60NCat. number1YMB531002M0001MADE by ABBThe above nameplate is example one for ABB CEF fuses and the information presented there could be different for specific fuse type.All CEF and CMF fuses ere marked with EAN 13 codes (on their cartoon boxes) that are specified in ordering tables right to catalogue numbers. The example of this name plate is presented below.ABBFUSE-LINKCEF 7.2kV-6AEAN13Bar codee/D: 192/65Prod. year: 02/2007Cat. no: 1YMB531001M0001Current limitationAll presented ABB fuse links are current limiting ones. A large short circuit current will therefore not reach itsfull value. The cut-off characteristics shows the relation between the prospective short circuit current andthe peak value of the cut-off current. Substantial current limitation results in a considerable reduction of thethermal and mechanical stress on the high voltage installation. ABB
High voltage current limitingfuse links type CEFIndex1. GENERAL82. OVERVOLTAGES83. PRE-ARCING TIMES94. CHOICE OF FUSE LINKS95. ORDERING TABLE116. DATA AND DIMENSIONS CEF137. ACCESSORIES158. ORDERING TABLE159. Data and dimension cef-bs1610. Data and dimension CEF-BS acc. to EN 60282-1:199617ABB
High voltage current limitingfuse links type CEFRated voltage: 3,6/7,2-36 kVRated current: 6-200 A1. GeneralThe HRC generation of fuse link type CEF are designed and tested according to IEC Publication 60282-1(IEC 282-1). Dimensionally the fuse links are in accordance with DIN 43625.ABB’s high voltage fuse links have the following properties:– Low minimum breaking current– Low power losses– Low arc-voltage– High breaking capacity up to 63 kA– High current limitation.Low power losses permit installation of these fuse links in compact switchgear.CEF fuses are of back-up type. They have a zone between the minimum melting current and the minimumbreaking current where the fuse links may fail to interrupt.For CEF fuse links this zone is very narrow. The minimum breaking current I3 for any type is specified in thetable on p. 13 and 14.2. OvervoltagesIn order to be current limiting, the fuse link must generate an arc-voltage exceeding the instantaneous valueof the operating voltage. The switching voltage generated by the CEF fuse link is below the maximum permissible value acc. to IEC 60282-1 (IEC 282-1). The CEF fuse link can safely be used if the system line voltage is50-100% of the rated fuse link voltage.3. Pre-arcing times AND CUT-OFF CHARACTERISTICS60403020MinutesPre-arcing TimeThe characteristics are equal for all rated voltages and are recorded from cold condition.Dashed sections of the curves indicate the zone of uncertain 80,6101620 25 31,5 4012550 63 80 1001602000,40,30,20,10,080,060,040,020,012345 6 7 810223456 7 81032345 6 7 8104Prospective current [A] ABB
High voltage current limitingfuse links type CEFMaximum cut-offcurrent [kA] (peak)100kA20 016012510 08063105040531,25201610610,10,010,1110Jp100 kAProspective cureent [kA] (rms)4. Choice of fuse linksChoice of rated current INFor the choice of rated current of fuse links for protection of transformers, the relation between the powerrating of the transformers, operating voltage and rated current of the fuse link is given in the table below.The same table indicates the highest rated current of the low voltage fuse link (on the low voltage side of thetransformer) which gives discrimination with the high voltage fuse link. The low voltage fuse link is of the typegL (VDE) or gG/ gM(IEC).For choice of fuse links for transformer protection in switchgear of type Safe Plus or Safering CTC-F, see SFInsulated Compact Switchgear and Ring Main Unit catalogue.ABB
High voltage current limitingfuse links type CEFChoice of fuse links for protection of transformersTRANSFORMER RATING 20051016252525404063636380100100160200200 250* 315* 315*6101616252525404063636380100100160200200 250* 3151061016161625252531,54063636380100100160200 250* 250*126101616161625252531,54063636380100160160200 0020610101016161620202031,5 31,5406363638010012516024610101010161620202031,5 040402x40 2x403661010101010101616161625252540402x40 2x405075100125160200250315400500630800 1000 1250 1600 2000 2500 3000 3500HIGH VOLTAGE FUSE-LINK In (A)Lowvoltage200 250* 315*315*LOW VOLTAGE FUSE-LINK In (A)220 V80100125160200250250315400500630380 V5063100100125125200250250350400400500630500 V40508080100100160160200250350350400500630*) CMF -fuse linkPresented values were calculated for free air conditions and 120% overload factor for protected transformers. If otherconditions apply given vales should be recalculated considering real situation.10ABB
High voltage current limitingfuse links type CEF5. Ordering tableHigh-voltage – HRC fuse CEFCEFCEFCEFCEFCEFCEFCEFCEFRatedvoltageUn 7,517,517,517,517,517,5TypeABBLengthe [mm]DiameterD [mm]Catalogue No.EAN13 32,32,33,62,33,63,611
High voltage current limitingfuse links type geUn EFTypeLengthe [mm]DiameterD [mm]Catalogue No.EAN13 ,06,26,2Other ratings and dimensions on request. When ordering outdoor version pls. indicate CEF –U.12ABB
High voltage current limitingfuse links type CEF6. Data and dimensions FCEFCEFCEFCEFCEFCEFCEFCEFRatedvoltageUn eABBShort CircuitMinimumRated PowercurrentbreakingPn [W]I1 [kA]current I3 65048010150650107Lengthe [mm]DiameterD 117,3880,0270,7135,4ResistanceRO [m 30,115,310,47,86,24,43,52,61,73,52,61,713
High voltage current limitingfuse links type FCEFCEFCEFCEFCEFCEFCEFCEFCEFCEFRatedvoltageUn 17,517,5RatedcurrentIn FCEFCEFCEFCEFCEFDiameterD O [m 7,934Ø45DI1 maximum short-circuit current testedI3 minimum breaking currentPN power loss at rated currentRo resistance at room temp.14Short CircuitMinimumRated PowercurrentbreakingPn [W]I1 [kA]current I3 the [mm]DØ45TypeeABB
High voltage current limitingfuse links type CEF7. AccessoriesFuse base type UCEFuse clips Catalogue No. 1YMX000128M00018. ORDERING 001Dimensions in mmUCE tCatalogue 0001UCE 0001UCE 0001UCE 52509M00011YMX052509M0001UCE 001UCE CEF test fuse-link 3,6/7,2-36 kV for test of striker system.Weight Dimension in mm[kg]e* Total lenghtCatalogue No.1,4192292442537605451YMX300062M0001*) AdjustableThe striker has a force-travel characteristic as shown in the figure on page 6.34Operating tong for fuse links CEF 3,6/7,2 – 36 kVCatalogue No.Test s in mmABBL1L2A3(Ø)70060030-9015
High voltage current limitingfuse links type CEF9. Data and dimension cef-bs16TypeRated voltage[kV]Rated logue No.EAN13 834Dimension CEF-BS-BDimension CEF-BS-CDimension CEF-BSDimension CEF-BS-DABB
High voltage current limitingfuse links type CEF10. Data and dimension CEF-BS acc. to EN 60282-1:1996TypeRated voltage[kV]Rated current[A]L/D[mm]A/d[mm]Catalogue No.EAN13 S-DCEF-BS-BCEF-BS-BCEF-BS-BCEF-B
The main function of current limiting fuses is to protect electrical apparatus like distribution transformers, motors, capacitor banks against overload currents. The fuses can operate as sole devices or can be combination with air/SF6 insulated switch disconnector. The choice depends on each application requirements and specific network conditions.
Switchgear OS switch fuses Short form catalogue 3 Switch Fuses 0115 ABB Low Voltage 3 Switch Fuses 0115 ABB Low Voltage Switchgear OS Switch fuses Contents Introduction 4 Overview 6 Features 8 OS Switches fuses 20 - 1250A 10 Accessories 17 4 Switch Fuses 0115 ABB Low Voltage 5 Switch Fuses 0115 ABB Low Voltage
and , or the diagram on the fuse box lid, which fuse or fuses control that component. Check those fuses first, but check all the fuses before deciding that a blown fuse is not the cause. Replace any blown fuses and check the component’s operation. 3. 1. 2. 4. 304 305 Checking andReplacing Fuses Fuses 302 Taking Careof theUnexpected BLOWN FUSE PULLER FUSE 01/09/28 20:14:33 31SZ3660_305. Look .
Miniature Fuses G SIBA Miniature Fuses 5x20 · 6.3x32 · 5x25 5x30 · 8x40 · 8x50 8x85 · 10x85 · 8x120 · 8x150 Axial leads: 5 x 20 · 6.3 x 32 2 pin fuses KS, Ø 8.4 mm SMD fuses: 0402 · 0603 · 0805· 1206 2.6x6.1 · 4.5x8 · 4.5x16 Voltage ratings 25 V - 10 kV Operation class: aR F T
Catalogue numbers - Class J fuses Catalogue number Rated LPJ - time delay LPJ - time delay fuses JKS - fast acting DJF - high speed Weight Packing current, A fuses with visual indication fuses fuses each, g size 1 CBLPJ-1SP CBJKS-1 CBDFJ-1 43 10 1,25 CBLPJ-1-1-4SP 43 10 1,6 CBLPJ-1-6-10SP 43 10 1,8 CBLPJ-1-8-10SP 43 10
Catalogue 2020-21 Life Line Plus S3 (HRFR) Cable Life Guard (FR-LSH) Cable Life Shield (HFFR) Cable Multicore Round Cable Shielded Cables Flat Submersible Cable Telephone Switch Board Cable LAN Cable CCTV Cable Co-Axial TV Cable Speaker Cable Presenting Domestic Cable Range for Safer, Securer Homes.
instrumentation tray cable 10 general purpose cable 12 instrumentation tray exposed run direct burial cable 14 power tray exposed run direct burial cable 16 industrial ethernet cable 18 fieldbus technology cable 20 extremelife cable 22 flexlife cable 24 weldlife cable 26 armorfast instrumentation cable 28 flexible service cable
The joints samples were composed of a mortise piece (stile) and tenon piece (rail). The first set of joints contained 10 joints made of natural ash wood, while the second set of joints contained 10 joints made of thermo-treated ash wood. The shape and dimensions of the test specimens of joints is shown in Fig. 2. Fig. 2.
Contents Company Capability 2 Cable Glands 7 Cable Lugs and Connectors 19 Cable Cleats 37 Cable Ties and Marking Systems 57 Cable Pulling Equipment 67 Insulation Products 77 LV Joints 87 MV Terminations 97 MV Joints 129 HV Joints 143 HV Terminations 147 Link Boxes 151 Resin, Compounds and Accessories 155 Earthing and Lightning Protection 161 Tapes, Aerosols and Accessories 183
