Technical information

J-34
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Timers & control relays
Digitaldevices
Digital defrost timer Digital voltage window comparator Digital current window comparator
DDDT DDVW1 DDVW3 DDCW1 DDCW3
Theunitcontrolsthetemperaturebyclosingthecoolingcontact
everytimethemeassuedtemperaturerisesabovethepre-setlevel.
Thecompressorwillonlyoperateafterthesetstartupdelay.The
coolingcontactwillopenifthetemperaturefallsbelowthesetpoint
minusthehysteresis.Theminimumontimeforthecompressoris
setinthemenu.
Thedefrostcyclewillstartwhenthecycletimehascompletedand
willendafterthepresetdefrosttime.
Fivefanfunctionscanbeselected:
1)Fanoperatesatthesametimeasthecompressor
2)Fanoperatesatthesametimeasthecompressorwithafandelay
3)Fanisoffinthedefrostcycle
4)Fanisoffwhenboththedefrostandcompressorareoff
5)Fanisonwhenpowerisappliedandremainson
Ifanerroroccursonthesensingcircuittheunitwillcontinueto
runinaerrorcyclesetinthemenu,whichisapercentageofthe
cycle time.
InterfaceswithTP1probe
DDVW3 - Theunitmonitorsvoltageofallthreephasesand
displaystheresultsinanumberofwayswhichcanbesetinthe
menu.
DDVW1-Theunitmonitorssingle-phasevoltage.
Separateparametercanbesettotripthetwointernalrelay.
Theunithasanauxiliarysupply.
Tripsettings(press‘SET’buttonmomentarily
1.OverPercentage(OP)
2.UnderPercentage(UP)
FunctionSettings(press‘SET’buttonfor10sec)
1.Relay1trip(R1)-1overvoltage
 -2undervoltage
 -3overandundervoltage
 -4phasereversal
2.Relay1trip(R2)-1overvoltage
 -2undervoltage
 -3overandundervoltage
 -4phasereversal
3.Hysteresis(Hy)
4.VTratio(UT)
5.StartupDelay(Sd)
6.OffDelay(Od)
7.Latch(La)
DDCW3-Theunitmonitorscurrentofallthreephasesand
displaystheresultsinanumberofwayswhichcanbesetinthe
menu.
DDCW1 -Theunitmonitorssingle-phasecurrent.
Separateparametercanbesettotripthetwointernalrelay.
Theunithasanauxiliarysupply.
Tripsettings(press‘SET’buttonmomentarily
1.OverPercentage(OP)
2.UnderPercentage(UP)
FunctionSettings(press‘SET’buttonfor10sec)
1.Relay1trip(R1)-1overcurrent
 -2undercurrent
 -3overandundercurrent
2.Relay1trip(R2)-1overcurrent
 -2undercurrent
 -3overandundercurrent
3.Hysteresis(Hy)
4.CTratio(CT)
5.StartupDelay(Sd)
6.OffDelay(Od)
7.Latch(La)
110,230,400,525Vareequippedwithinternaltransformervoltage(testvolts:2k)
±0.2%
±0.2%
NA
AC:110,230,400,525V+/-15%
6A 6A 6A
AC:±2.4VA
0.5sec(500mSec)
4kVbetweensupply/outputandadjacentcontacts
1kVbetweenopencontacts.
30millionoperations
(operating)-20+60°C
848.00 871.00 895.00 1069.00 1158.00