ResidualCurrentCircuitBreakers
FI,NFI
• Residualcurrentcircuitbreakers(RCCB)areusedforprotectionagainstindirectcontact,fireprotectionand
additionalprotectionagainstdirectcontact.
• Theyaresuitableforisolation.
• Nooverloadprotectionorshort-circuitprotectionisbuiltinRCCB.
• Twoversionsaccordingtobehaviourinpresenceofd.c.components:
-TypeA(markedNFI)-sensitivetoalternatingandpulsatingd.c.residualcurrents.
-TypeAC(markedFI)-sensitivetoalternatingresidualcurrentsofsineform.
• Assemblytoa35mmwidemountingrailinaccordancewithEN60715.
• Optionaloperationposition.
• DegreeofprotectionIP20,degreeofprotectionIP40afterinstallationinadistributionbox.
• Additionalcolourdisplayofthepositionofmaincontacts(red-contactsclosed,green-contactsopen).
• Aterminalshapepreventsconnectionofaconductoroutsidetheconnectionarea.
• Specialversions:
- Type S:aswitchwithdelayedbreakenablingselectivityregardingageneraltypeandashort-timedelayedtype
(typeG)connectedontheloadside.Breaktimeislongerthan40ms.Theswitchesexcelinhigh
resistancetosurgecurrents(upto3kA),whichpreventsunwantedtrippings.Theirratedcurrentsarefrom25to
100A,andratedresidualoperatingcurrentsare100,300and500mA.ThisistypeA,andacustomercanchoose
betweenNFI2Stwo-poleandNFI4Sfour-poleswitches.
- Type G:ashort-timedelayedbreakingcharacteristic(min.non-actuatingperiodis10ms).Theswitchesare
resistanttounwantedtrippingsatcurrentimpulsesorwhenbuilt-ininspecialcriticalconditions.Theyexcelinhigh
resistancetosurgecurrents(upto3kA)andareliableoperationincaseofhighmakingcurrents.Rated
currentsarefrom25to100A,andratedresidualoperatingcurrentsare30,100,300and500mA.ThisistypeA,
andacustomercanchoosebetweenNFI2Ktwo-poleandNFI4Kfour-poleswitches.
VersionsSandGcomplywiththeEN61008standard.Regardingtrippingtimes,typeGalsocomplieswith
ÖVE/ÖNORME8601(supplementtoÖVEEN61008).BothtypesareVDEapproved.
- FIR – FIT combination:Itisusedfortheprotectionincircuitswhereoperationalcurrentsarehigherthatrated
currentsofresidualcurrentcircuitbreakers.AnactuatingrelayFIRisseparatedfromaFItransformer(FIT).The
functionofloadswitchingisperformedbythecontactororacircuit-breakerwithanundervoltagerelease.
Acombinationratedcurrentthereforedependsonselectedswitchingdevices.Itislimitedwithcablecross-sectionswhich
canbeinsertedthroughtheholeoftheFItransformer.Rateddifferentialcurrentsare0.3A,0.5A,1Aand2A.
99
ResidualCurrentCircuitBreakers
FI,NFI
TECHNICALDATA
TypeAC
FI2
FI4
A
NFI2
NFI4
A-G
NFI2K
NFI4K
A-S
NFI2S
NFI4S
Standards
IEC/EN61008,typeA-Gacc.toÖVEE8601
Approvals
VDE,NF,GOST-R
No.ofpoles
Ratedvoltage
V
Un
Ratedimpulsevoltage
230/400
kV
4
f
Hz
50
In
IΔn
mA
Im=IΔm
A
Ratedcurrent
Ratedresidualoperatingcurrent
=Ratedresidualmakingandbreakingcapacity
4
230
Uimp
Ratedfrequency
Ratedmakingandbreakingcapacity
2
A
16,25,40,63,80,100
25,40,63,80,100
10(In=16,25A),30,100,300,500
800(In=16-80A)
30,100,300,500
1000(In=100A)
63(In=16-40A)
Max.back-upfuseforshort-circuitcurrent
80(In=63,80A)
Iv
A
Inc
kA
10
S
mm2
1…35
100(In=100A)
Ratedconditionalshort-circuitcurrent
Terminalcapacity
ms
1xIΔn:≤300ms;5xIΔn:≤40ms
ms
typeA-G-1xIΔn:10ms<T≤300ms;5xIΔn:10ms<T≤40ms
typeA-S-1xIΔn:130ms<T≤500ms;5xIΔn:50ms<T≤150ms
Ambiemttemperature
°C
−25…+40
Storagetemperature
°C
Weight
kg
Tighteningtorque
Nm
Max.trippingtimes,typesAC,A
Responsetimedelay,typesA-G,A-S
−35…+60
0.23
0.39
2.0
ACCESSORIES
Asealingcoverfortwo-pole(SCNFI2)andfour-pole(SCNFI4)switches
DIMENSIONS
FI2,NFI2
FI4,NFI4,FIR
ORDERINGDATA
FI2
NFI4
100
-
-
25
40
/0,03
/0,3
RatedresidualoperatingcurrentIΔn(A)
RatedcurrentIn(A)
Type
FIT