Technical information

J-27
Above prices do not include VAT. E&OE
Monitoringdevices
Function Two level liquid level Four probe liquid level Pump protection relay
Model DLL DLL4 DPP1 (single) DPP3 (three phase)
Description of operation
1. Emptying
TherelayoperateswhentheliquidreachestheMAXelectrode
(contact 7), and releases when the liquid is no longer in
contactwiththeMINelectrode(contact9).Contact10mustbe
connecttothecontainer(ifconductive)oraseperateadditional
electrodeshouldbeused.
2. Filling
TherelayreleaseswhentheliquidreachestheMAXelectrode
(contact 7) and operates when the liquid is no longer in
contactwiththeminelectrode(contact9).Contact10mustbe
connecttothecontainer(ifconductive)oraseperateadditional
electrodeshouldbeused.
Single level
Therelay canalsobe usedfor singlelevelcontrol highor low
byonlyconnectingonelevelelectrode.
1. Emptying with AlarmRelay1operateswhenliquidreaches
the MAX1 electrode (contact 7) if liquid continues to fill to the
MAX 2 electrode level relay 2 (alarm) reset when the liquid
dropstobelowtheMIN1electrode(contact11)relay1resets.
Iflevelcontinuesto drop to below MIN 2 levelrelay2(alarm)
willreset.
2. Filling with AlarmRelay1releaseswhenliquidreachesthe
MAX1electrode(contact7)ifliquidcontinuestofilltotheMAX
2electrodelevel relay2(alarm)resetwhentheliquiddropsto
belowtheMIN1electrode(contact11)relay1operates.Iflevel
continues to drop to below the MIN 2 level electrode relay 2
(alarm)resets.
3. Emptying with pump priority Relay1 operates when
liquid levels reaches the MAX1 electrode (contact 7) relay 1
releases when level drops to below MIN 1 electrode (contact
11).IfthelevelreachesMAX2electrode,relay2operatesand
remains energised until level drops to below MIN 2 electrode,
whereafter relay 2 releases. This way the stand-by pump is
activated,emptyingthetankfaster.
4. Filling with pump priority Relay1releaseswhenliquidlevel
reachestheMAX1electrode(contact7)relay1operateswhen
level drops below MIN 1 electrode (contact 11).If the level
drops below MIN 2 electrode (contact 13), relay 2 operates
and remains energised until MAX 2 electrode is reached,
whereafter relay 2 releases. This way the stand-by pump is
activated,fillingthetankfaster.
5. Container filling and well draining with alarm Relay1
operateswhenliquidlevelreachesMAX2inthewell.Relay 1
releaseswhen levelreachesMAX 1inthe containerorMIN 2
inthewellrelay2(alarm)willreleaseiflevelisbelowMIN1(in
container)andMIN2(inwell)
6. Electrode test All indicators are on if the (contact 14 and
contact 13) is in good contact with liquid and the liquid is
sufficientlyconductive. NoLEDindicates thatthepoor contact
(resistancehigherthan80kohm)
Time delay: 1 - 10sec (adjustable) response delay is
incorporated.
The unit monitors the following parameters and responds
accordingly:
Voltage sensing
The relay releases if the supply voltage exceeds or falls
below 15% of the set limit stored during calibration. If the
voltage returns to within 15% of the set value the relay will
automaticallyoperate,startingthepump.
Phase Failure / Sequence
If there is a loss of any phases supplied to the unit the relay
release.If anytwo phasesare reversedtherelaywillrelease.
Therelaywillautomaticallyoperateifthesequenceisrestored
orthephaselossiscorrected.
Overload sensing
If the current exceeds the set limit stored during calibration
the relay will release after a one second delay.The relay will
restartaftera10secondpause.Ifanovercurrentconditionis
detectedthree consecutivetimes theunitwilltrippermanently
untilthepowerisremovedandreapplied.
Underload sensing
The unit will detect a loss of load but detecting the increase
in angular lag between the voltage and the current. The
underloadwill releasethe relayafter a10 secondsdelay.The
relaywillremain offforthe recovery time,afterwhich the unit
willrestartthepump.
Theunitcanbecalibratedfromanun-calibratedstate(allLED
flashing) by pressing the front cover ‘SET’ button. The unit
can be reset (not re-calibrated) from a latched fault state by
pressing the ‘SET’ button. This can only be done three times
in 15 minutes. This limit on restarts applies to non-latching
faults.Tore-calibratetheunit,the‘SET’buttonhastobepress
when the supply is applied to the unit until the POWER LED
stopsflashing.
POWER LED STATUS LED RELAY LED
Overvoltage flashing on off
Undervoltage on flashing off
Overcurrent flashing off off
Undercurrent off flashing off
Phasereversal flashing flashing off
Contact8&9open on off off
Startupdelay on off flashing
Pumprunningok on off on
Uncalibrated flashing flashing flashing
Galvanic insulation 110,230,400Vareequippedwithinternaltransformervoltage.(testvolts:2kV)
Range accuracy ±0.5%
Repeat accuracy ±0.2%
Time adjustment viadedicatedcalibratedfrontknob(scaleaccuracy:±5%)
Standard voltages
AC:12,24,48,110,230,400,525V±15%
DC:12,24,48,±15%
Contact rating
10A250Vac 16A250Vac
Consumption
AC:±2.4VA
DC:100mA
Reset time 0.5sec(500mSec)
Insulation
4kVbetweensupply/outputandadjacentcontacts
1kVbetweenopencontacts.
Mechanical life 30millionoperations
Ambient limits (operating)-20+60°C
Dimensions
(H)92mmx(D)64mm(W)35.5mm(2moduleswide) (H)92mmx(D)64mm(W)53.5mm(3moduleswide)
Connection diagram
Price 429.00 664.00 570.00 631.00