BS PD IEC TR 619121低压开关装置和控制装置过电流保护装置第1部分短路额定值的应用.docx
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BSPDIECTR619121低压开关装置和控制装置过电流保护装置第1部分短路额定值的应用
BSPDIECTR61912-1-2007低压开关装置和控制装置.过电流保护装置.第1部分短路额定值的应用
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devices—
Part1:
Applicationofshort-circuit
ratings
ICS29.130.20
Low-voltageswitchgea
andcontrolgear—
Overcurrentprotectiv
PUBLISHEDDOCUMENTPDIEC/TR
61912-1:
2007
PDIEC/TR61912-1:
ThisPublishedDocumentwas
publishedundertheauthority
oftheStandardsPolicyand
StrategyCommittee
on31October2007
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BSI2007
ISBN9780580571541
Amendmentsissuedsincepublication
Amd.No.DateComments
Thispublicationdoesnotpurporttoincludeallthenecessaryprovisionsofa
contract.Usersareresponsibleforitscorrectapplication.
2007
Nationalforeword
ThisPublishedDocumentistheUKimplementationofIEC/TR61912-1:
2007.
ItsupersedesPDIEC/TR61912:
2006whichiswithdrawn.
TheUKparticipationinitspreparationwasentrustedbyTechnicalCommittee
PEL/17,Switchgear,controlgear,andHV-LVco-ordination,toSubcommittee
PEL/17/2,Lowvoltageswitchgearandcontrolgear.
Alistoforganizationsrepresentedonthiscommitteecanbeobtainedon
requesttoitssecretary.
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IEC/TR61912-1
Edition1.02007-08
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Low-voltageswitchgearandcontrolgear–Overcurrentprotectivedevices–
Part1:
Applicationofshort-circuitratings
Appareillageàbassetension–Dispositifsdeprotectioncontrelessurintensités–
Partie1:
Applicationdescaractéristiquesdecourt-circuit
IE
C
/T
R
6
19
12
-1
:
2
00
7
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CONTENTS
1
2
3
4
5
6
6.1
6.2
6.3
6.3.1
6.3.2
6.3.3Controlandprotectiveswitchingdevices（CPS）accordingto
6.3.4Circuit-breakersaccordingtoIEC60898-1（MCBs）andresidual
currentoperatedcircuit-breakerwithintegralovercurrentprotection
7
7.1
7.2
7.3
7.3.1Switchgearandcontrolgearassemblies（switchboard/motor-control
7.3.2
7.4
7.4.1
7.4.2
7.4.3Controlandprotectiveswitchingdevice（CPS）accordingto
7.5Short-circuitprotectionusingcircuit-breakersforhouseholdandsimilar
installationsaccordingtoIEC60898-1（usuallyknownasMCBs）andresidual
currentoperatedcircuit-breakerswithintegralovercurrentprotection
（RCBOs）accordingtoIEC61009-1.......................................................................
AnnexA（informative）InterpolationofthesuitabilityofanalternativeSCPDforthe
Figure1–ExampleoftheI2
Figure2–ExampleoftheI2
INTRODUCTION.....................................................................................................................4
Scope...............................................................................................................................5
Normativereferences.......................................................................................................5
Alphabeticallistofdefinitionsandcharacteristics.............................................................6
Principleofapplication–Installation................................................................................7
Characteristics–Low-voltageassemblies（switchboard,distributionboard,etc.）..............7
Characteristics–Switchingdevices..................................................................................8
General...................................................................................................................8
Switchingdevices–Self-protectionagainstshort-circuit..........................................8
Switchingdevices–ApplicationasSCPD................................................................9
Fuse-combinationunitsandfusesasSCPD................................................9
Circuit-breakerstoIEC60947-2asSCPD...................................................9
IEC60947-6-2asSCPD............................................................................10
（RCBOs）accordingtoIEC61009-1asSCPD............................................10
Examplesofthepracticalapplicationoftheproductcharacteristics................................11
General.................................................................................................................11
Protectionofcables...............................................................................................11
Short-circuitprotectionforLVassemblies..............................................................11
centre（MCC））............................................................................................11
Busbartrunkingsystems（BTS）.................................................................11
Short-circuitprotectionforcontactorsandstarters................................................12
General.....................................................................................................12
Protectedswitchingdeviceandprotectedstarter.......................................12
IEC60947-6-2...........................................................................................13
13
protectionofcontactorsandstarters（substitution）................................................................19
Bibliography..........................................................................................................................20
tcharacteristicofafuse............................................................15
tcharacteristicofacircuit-breaker............................................15
Figure3–ExampleofSCPDsincombination.......................................................................16
Figure4–Exampleofthederivationofaconditionalratingfromtype-testparameters.........17
Figure5a–Co-ordinationofamotor-starterwithafuse........................................................18
–2–PDIEC/TR61912-1:
2007
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Table1–Ratiokbetweenserviceshort-circuitcapacity（Ics）andratedshort-circuit
capacity（Icn
Table2–Valueoftheprospectivetestcurrentaccordingtotheratedoperational
Figure5b–Co-ordinationofamotor-starterwithcircuit-breaker...........................................18
Figure5–Illustrationofco-ordinationbetweenmotor-starterandSCPD...............................18
）foranMCBaccordingtoIEC60898-1.............................................................14
current..................................................................................................................................14
–3–PDIEC/TR61912-1:
2007
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INTRODUCTION
Low-voltageequipmentstandardsIEC60947andIEC60439currentlyincludeshort-circuit
ratingsforproductsandassembliesrespectively,definedintermsoftheabilityofthe
equipmenttooperateatalevelofpeakcurrent,anr.m.s.currentforaspecifiedtimeand/ora
levelofcurrentconditionaluponashort-circuitprotectivedeviceinseries.Inpracticethe
correctapplicationofthevariousshort-circuitratingsneedstobefullyunderstoodbythe
circuitdesignertoavoidleavingacircuitorequipmentwithinadequateshort-circuit
protection.Itisalsousefultotakefulladvantageofthecapabilityofdevicesandsystemsto
avoidover-engineering,withtheconsequentunnecessaryadditionalcost.
–4–PDIEC/TR61912-1:
2007
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LOW-VOLTAGESWITCHGEARANDCONTROLGEAR–
OVERCURRENTPROTECTIVEDEVICES–
Part1:
Applicationofshort-circuitratings
1Scope
Thistechnicalreport,whichservesasanapplicationguidefortheshort-circuitratingsgivenin
IECstandardsforlow-voltageswitchgearandcontrolgearandassemblies,summarisesthe
definitionsoftheratingsandprovidesexamplesoftheirapplication.
NOTEThisdocumentdoesnotconcernitselfwithhousehold（domestic）installations.
2Normativereferences
Thefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.
Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatestedition
ofthereferenceddocument（includinganyamendments）applies.
IEC60255（allparts）,Electricalrelays
IEC60269-1,Low-voltagefuses–Part1:
Generalrequirements
IEC60364（allparts）,Low-voltageelectricalinstallations
IEC60439-1,Low-voltageswitchgearandcontrolgearassemblies–Part1:
Type-testedand
partiallytype-testedassemblies
IEC60439-2,Low-voltageswitchgearandcontrolgearassemblies–Part2:
Particular
requirementsforbusbartrunkingsystems（busways）
IEC60898-1,Electricalaccessories–Circuit-breakersforovercurrentprotectionfor
householdandsimilarinstallations–Part1:
Circuit-breakersfora.c.operation
IEC60947-1,Low-voltageswitchgearandcontrolgear?
?
Part1:
Generalrules
IEC60947-2,Low-voltageswitchgearandcontrolgear?
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Part2:
Circuit-breakers
IEC60947-3,Low-voltageswitchgearandcontrolgear?
?
Part3:
Switches,disconnectors,
switch-disconnectorsandfuse-combinationunits
IEC60947-4-1,Low-voltageswitchgearandcontrolgear?
?
Part4-1:
Contactorsandmotor-
starters?
?
Electromechanicalcontactorsandmotor-starters
IEC60947-6-2,Low-voltageswitchgearandcontrolgear?
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Part6-2:
Multiplefunction
equipment–Controlandprotectiveswitchingdevices（orequipment）（CPS）
IEC61009-1,Residualcurrentoperatedcircuit-breakerswithintegralovercurrentprotection
forhouseholdandsimilaruses（RCBOs）–Part1:
Generalrules
–5–PDIEC/TR61912-1:
2007
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3Alphabeticallistofdefinitions
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