User Manual

DIR 1000587R0002 (L3821)
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Ref. Description
 21 Testand“iTest”infobutton
 22 PositionindicatorofDIPswitchesforsettingtimet2
23 DIPswitchforsettingtriptimet2andtypeofcurve
 24 PositionindicatorofDIPswitchesforsettingtimet1
25 DIPswitchforsettingtriptimet1
26 Ratingplug
 27 DIPswitchforsettingmainsfrequencyandadjustingneutralprotection
2.4.1 Trip Test
Beforecommissioning,runatest(“TripTest”)onthewholeTCchainbypressingandholdingbutton“iTest”pressedforatleast7sec.Apositive
outcomeisshownbycircuit-breakeropening(seeWatchdog).Torunthetest,batteryunitmustbeconnected.
2.4.2 Initial settings
ABwillhavetheadhesivelabelsafxedontotheLSIGforallvariablesrelatingtocircuitbreaker(e.g.Typeofcircuitbreaker,RatingPlugsize,etc.)
ConsiderthatABprovidesasensibledenitionforeachpossiblesetting(seepar.2.4.4).
Apart from this, before the LSIG unit is commissioned, user must accurately dene every alterable parameter.
2.4.3 Changing protection functions
ThisparagraphdescribessettingofprotectionfunctionsimplementedintheLSIGunit.Onlysettingmethodsandvaluesthatcanbeselectedare
explainedhere.Forallotherinformationonthetechnicalcharacteristicsoftheprotectionfunctions,seepar.2.1.4.
No parameters can be set when the LSIG unit is in alarm conditions.
2.4.3.1 Example of setting
Inthediagramsonfrontplate(seepar.2.4)relatingtosettings,thepositionoftheDIPswitchisshowninwhitecolor.
AnexampleofhowtosettheDIPswitchforprotectionfunctionLisgivenbelow,whereI
n
=2000A:
IncorrectcongurationofDIPswitchescausesa“inconsistentsettings”indicatedbyLEDs(seepar.2.6.1).
Theruletobecompliedwithis:I1<I2<I3.
E.g.:ifI1=1InandI2=1In,therelaywillindicatean“inconsistentsetting”error.SameindicationifI2=5InandI3=4In
2.4.4 Default setting of LSIG unit
TheLSIGissuppliedbyABwiththefollowingpredenedparameters:
# Protection Thresholds Time
1 L 1In 144s
2 S Off 0.1s
 3 I 4In —    
 4 G Off 0.1s
5 Mains frequency
(1)
 6 Neutral Sel.
(2)
Note:
(1)
= 50 Hz for IEC type CB
60 Hz for UL type CB
(2)
= Off for three-pole versions
50% for 4-pole versions
2.5 Operatinginstructions/Operationinservice
2.5.1 Adjusting the neutral
Neutralprotectionisnormallysettoacurrentvalue50%oftheadjustmentmadeonthephases.
Frequency