KYORITSU 6050 - Page 25

― 23 ―
6.2.3 Testing
(1)PresstheTESTBUTTON
OperatingtimeofRCDisdisplayedonLCD.AtAutoRamp,
operatingcurrentvalueofRCDwillbedisplayed.
●×1/2.................TheBreakershouldnottrip.
●×1....................TheBreakershouldtrip.
●×5....................TheBreakershouldtrip.
● DC....................Thebreakershouldtrip.
●AutoRamp( )..TheBreakershouldtrip.CheckTripOutCurrent.
(2)Pressthe0°/180°switchtochangethephaseandrepeatstep(1).
(3)Changethephaseagainandrepeatstep(1).
● BesuretoreturnthetestedRCDtotheoriginalconditionafterthe
test.
MAKESURETOKEEPCLEAROFEARTHEDMETALDURINGTHE
OPERATIONOFTHESETESTS.
Note:
● IftheRCDdoesnottrip,thetesterwillsupplythetestcurrentfora
maximumof1000msontheX1/2andX1ranges.Thefactthatthe
RCDhasnottrippedwillbeevidentbecausetheP-NandP-ELEDs
willstillbeon.
● If"I⊿n"settingisgraterthantheratedresidualcurrentofRCD,RCD
willtripand"no"maybedisplayedonLCD.
● Ifavoltageexistsbetweentheprotectiveconductorandearth,itmay
influencethemeasurements.
● Ifavoltage exists between neutral andearth, it may influence the
measurements,therefore,the connection between neutralpoint of
thedistributionsystemandearthshouldbecheckedbeforetesting.
● IfleakagecurrentsflowinthecircuitfollowingtheRCD,itmay
influencethemeasurements.
● Thepotentialfieldsofotherearthinginstallationsmayinfluencethe
measurement.
● SpecialconditionsofRCDsofa particular design, forexampleS-
type,shallbetakenintoconsideration.
CAUTION
● WhentheUcvoltagerisestoULvalueorgreater,the
measurementisautomaticallysuspendedand"UcH"is
displayedontheLCD.