Cable Limiter
Transcript of Cable Limiter
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Cable Limiters
Increase System Reliability
Decrease Downtime
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IncreasesystemreliabilityandversatilitywithFerrazShawmutCableLimiters.CableLimiters
aredesignedfortheprotectionoflowvoltagedistributionnetworks,feedersandservice
entrancecables.PermittedbyNationalElectricCodeArticle230.82(1),cablelimitersprevent
serviceoutagesbyisolatingdamagedcablesensuringcontinuityofcustomerpower.
Ferraz Shawmut Cable LimitersInstallFerrazShawmutcablelimitersinunderground
powerdistributionsystemsfoundincommercial,
industrial,andresidentialapplications.Cablelimitersare
designedforuseinbothradialandnetworktypeunder-
groundsystemstoreducethehazardsofunexpected
downtimeandmaintenance.FerrazShawmutoffersa
fulllineofboth600VACand250VACcablelimiters,with
the600VACproductlinebeingULListedforcodecom-
pliance.Selecttheproperlimiterforyourapplicationby
choosingfromsevenavailableterminalcombinations
suitableforaluminumorcopperwiresizesfrom1AWG
upto1000kcmil.
Customer Benefts
CableLimitersofferusersaninexpensivesolutionto
preventcostlydowntime.CableLimitersisolatefaulty
cablesandallowtheremainingcablestokeepyourbusi-
nessupandrunning.Faultycablescannowbepulled
andreplacedduringascheduledorroutineshutdown
when power is not needed.
Applications and InstallationThree common cable limiter applications include:
1.Distributionnetworksystemswiththree
or more cables in parallel per phase
Install cable limiters on each end of each cable to
allowforisolationofdamagedcables.Thelimiters
removedamagedcablesfromthecircuittomain-
tain service.
2.Commercialandresidentialapplications
with multiple customers fed from one
transformer
Install one cable limiter on the secondary of theutility transformer per cable run. Allow businesses
and homes to maintain power if a fault may occur.
3.SecondaryTies
Protect circuits that connect two power sources
orpowersupplypointstopreventvaporizationof
cables under short circuit faults.
ncrease system
reliability and
versatility with
Ferraz Shawmut
Cable Limiters.
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Three or more Conductors
per Phase.
Forlargerampereratedsystemsitiscommontouseseveralsmaller
cablesinparallel,insteadofonelargecable,toshareaheavierload.
ForthisapplicationCableLimitersareinstalledonthesecondaryof
the utility transformer and on the line side of the service entrance
disconnect. It is important to install cable limiters on each end of each
cable. In most cases the customer hired contractor is responsible for
installinglimitersattheutilitytransformerandonthelinesideofthe
serviceentrancedisconnectatthebuilding.Ifonecableexperiences
afault,thefaultycablewillbeisolatedfromthenetworkallowingthe
remainingcablestomaintainpowertothesystem.Thedamagedcable
cannowbereplacedduringascheduledshutdownwhenrevenuegainor
productionisnotatriskofdowntime.Unexpectedpowerlosscanresult
in lost revenue.
Industrial
NECArticle230.82(1)permitstheinstallationofcablelimitersonthe
supplysideoftheserviceentrancedisconnect.Ensuresystemreliability,
guaranteeoperation,reducemaintenancecostsandpreventunexpected
downtime.Benetfromusingcableprotectioninalltypesofindustries
suchasmetalfabrication,wastewater,assembly,electronics,textile,oil
andgas,pulpandpaper,rubber,steel,aluminum,glassandchemical.
FerrazShawmutcablelimitersaredesignedtowithstandharshenviron-
mentsandwillnotdeterioratefromelementssuchasage,moistureor
environmentalsurroundings.FerrazShawmutlimitersareself-contained
andself-protecting.Variousterminationofferingsaccommodatealltypes
of installations.
Commercial
Malls,stripmalls,shoppingcenters,outlets,retailbusinesses,univ
ties,governmentfacilities,andofcebuildingsaretypicalcustome
thatbenetfromtheinstallationofcablelimiters.Protectincoming
powertotheretailcenterspowerdistributionnetwork.Constructio
workexternaltothefacilityisamajorcauseofdamagedcables.
Improperlymarkeddigsites,equipmentmalfunctionandoperator
errorcanallresultinpotentiallyhazardouselectricalfaults.Protec
commercial developments with cable limiters and prevent potentia
revenues to its tenants.
Application Example
ServiceEntrance
RecommendedProduct:Amp-TrapCP
ServiceEntrance
FaultOPEN
UtilityTransformer
CableLimiters
CableLimiters
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Secondary Ties.
ECarticle450.6(A)(3)statesthatanysecondarytie,600Vor
essnominal,shallbeequippedwithaprotectivedevicethatwill
penundershort-circuitconditions.Article450.6(A)(3)permits
he installation of a cable limiter as an acceptable method of
meetingthisrequirement.
secondary tie is a point in a circuit where two power sources
rpowersupplypointsareconnected,suchasthesecondary
ftwotransformers.Forexamplethiscouldbetwoindividual
ansformersorabankoftransformersoperatingasaunit.
Multiple Services Supplied by
a Single Source.
Multipleservicessuchasresidentialdevelopments,apartment
buildings,andsmallcommercialbuildingsconsumelighterloads
andareoftenfedfromasingletransformer.Topreventtheentire
neighborhood,apartmentbuildingorstripmallfromexperiencing
anoutage,cablelimitersareinstalledoneachcableruntoeach
individualservice.Inthecaseofacablefault,thefaultyservice
willbeisolatedfromtheremainingcustomers.Forthisapplication
onlyonecablelimiterisrequiredpercablerunonthesecondary
of the utility transformer.
ecommendedProduct:Amp-TrapCP
Transformer Transformer
ServiceService
UtilityTransformer
RecommendedProduct:Amp-TrapCPand2CL
Customer Customer Customer Customer
CableLimiters
CableLimiter
OvercurrentProtection
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Amp-Trap®
CP – 600VACCable Limiters
Approved 600VAC limiters for heavy commercial and industrial
applications. Ideal for multiple cable runs per phase. Increase
reliability and prevent unexpected downtime.
• ULListed,FileE305297
• 600VAC,200kAIR
• Superiorshortcircuitprotection
• Cablesizes#2–1000kcmil
• Seventerminalcombinationsavailable
• CopperorAluminumcable
• Optionalheatshrinkormoldedrubber
boots available
Amp-Trap®
2CL – 250VACCable Limiters
Approved250VAClimitersforlightcommercialandresident
applications.Protectundergroundcablerunsfromthermal
damagecausedbyshortcircuits.
• FerrazShawmutCertied
• 250VAC,200kAIR
• Superiorshortcircuitprotection
• Cablesizes#1–500kcmil
• Fourterminalcombinationsavailable
• CopperorAluminumCable
• Shorterinlengththanstandard600VACrated
cable limiters
Installationinformation,includingcrimpingtoolrecommendations,limiterperformancecharacteristicsandpartnumbersisavailable
onlineatus.ferrazshawmut.comorbycontactingyourlocalsalesrepresentative.
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or more information,
sit our website at
s.ferrazshawmut.com.
SA
74 Merrimac Street,
ewburyport, MA 01950
: 978-462-6662
978-462-0181
anada
8 Horner Avenue
oronto, Ontario,
anada M8Z 5Y3
: 416-252-9371
416-252-6572
2008 Ferraz Shawmut. All rights reserved.
A relentless pursuit of protection for electrical components,
systems—and the people who use them.
FerrazShawmutisaninternationalcompanymanufacturingthewidestrangeofcircuitprotection
solutionsintheelectricalindustry.Drawingonacenturyofexperience—andanongoingcommitment
tocriticalresearchinelectricalsafety—weprovideindustrial,commercial,andOEMcustomerswith
innovativeproductsandtechnicalsupportteamstoincreaseeffectiveness,simplifyapplications,and
enhanceproductivity.Learnmoreaboutourcircuitprotectionsolutionsatus.ferrazshawmut.com.
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