User Manual

DIR 1000587R0002 (L3821)
(10)
Insomeinstallations,whereparticularlyhighharmonicsoccur,thecurrentrunningonneutralmaybehigherthanthatofphases.
IntheLSIGrelease,thisprotectioncanbesetforthefollowingvalues:I
n
N=0-50%-100%-200%*I
n.
With three-pole circuit breakers, without external neutral, Neutral is adjusted to OFF
2.5.2 Guidance for Neutral adjustment
Adjustmentofneutralvalue(I
n
N)mustcomplywiththefollowingformula:I
1
xI
n
N≤Iu
Whena4-poleCBisavailable,thissettingiscontrolledbytherelaywhichsignalsthefaultthroughaLED(seepar.2.6.1),andautomatically
adjuststheparameterwithintheacceptedlimits.
Whena3-poleCBwithexternalneutralisavailable,therelaydoesnotperformanycontrolandsettingsaretobeadjustedbyuser.
E.g.: With140G-N1200withRatingPlugat400A,Iu=1200AandI1=1In,adjustmentofI
n
Nmaybe50-100-200%
 With140G-N1200and800ARatingPlug,Iu=1200AandI1=1In,adjustmentofI
n
Nmaybe50-100%
Note 1: I
1
=1l
n
setting is intended as the maximum adjustment of the protection against overloads. Actual maximum allowable adjustment must take into account any tempe-
rature derating, terminals used and altitude, or In (rating plug)≤ 50% of circuit breaker size.
Failure to comply with the setting limits for “I1“and“I
n
N” can cause damage to circuit breaker with consequent risks even for
operator.
2.5.3 Replacing an electronic release
TocompletetheprocedureforinstallingLSIG,takethefollowingsteps:
1. Withthecircuitbreakeropenandpreferablyisolated,installtheprotectionunitonthecircuitbreaker.
2. PowertheunitONLYfromthebatteryunit.
3. Iftherearenoerrorsotherthancongurationerror(seepar.2.6.1),pressandhold“iTest”buttonforafewsecondsuntilallredLEDs
startashingconrmingthatinstallationiscompleted.
4. Removethebatteryunit.
5. Powertherelayfromanysupply(Vaux,batteryunit).
6. Makesuretherearenocongurationerrors(“Alive”LEDglows).
7. Circuitbreakerandreleasecannowbecommissioned.
2.6 DenitionofalarmsandsignalsfortheLSIGunit
2.6.1 Optical signals
ThefollowingtableshowshowtheLEDsaremanagedinaccordancewithIEC60073standard(clause4.2.3.2inparticular).
TheLEDalertsaboutstatusofthefunctionsetonitszone;e.g.inthegureinpar.2.5theLEDreferencedas8identiesstatusoffunctionL.
Alsoseethefollowingtable
LED permanently ON
TCerrororTCdisconnected
CSerrorordisconnected
RatingPlug/Installationerror
(1)
Protectiontimererror
Lasttrip
(2)
Testbutton presseda nd
nofailuredetected
(3)
Lpre-alarm
Congurationerror
(4)
Settingsinconsistency
Normaloperationofrelay
(5)
CBUndenedor
CBstatuserror
RED
Flashing
slowly (0.5 Hz)
RED RED
RED
ORANGE
RED
RED
ORANGE
Type of information
All LEDs
All LEDs
All LEDs
All LEDs
Single LED
Single LED
Flashing fast (2Hz)
LED ashing with
two 0.5 sec pulses
every 2 sec



ORANGE
Single LED
LED ashing with
one pulse
every 3 sec
ORANGE

Single LED
LED permanently ON






Single LED
ORANGE

(1) RPdisconnectedorRP>Iu
(2) Informationonthe“Lasttrip”isdisplayedwhentheLEDrelatingtotheprotectionunitthathasbeentrippedcomeson.TheLEDremainson
for2sec,orpermanentlyifanoutsidepowersupply(frombatteryunit)isbeingused.
(3) TheinformationisdisplayedwithallLEDsonforaslongasthetestbuttonispressedandheld,orfor2sec.
(4) Installedvaluesdifferfromstoredvalues.Therefore,therelaymustbeinstalled(see2.5.3).
(5) Ifothersignalsaren’tpresent,theunit’soperatingmodeisindicated3secaftertheunithasbeenturnedon.