Vemer LCR048 Handleiding

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V3IS00196-031

Mod. LCR

User Manual

CONTROL RELAY FOR ELECTRICALLY CONDUCTED LIQUID LEVELS

Read all the instructions carefully

 ThelevelcontrolrelayLCR is an electronic command device in a standardised

4-module DINcontainer,tocontrolthelevelofelectricallyconductiveliquids.

SAFETY WARNINGS

During the installation and operation of the instrument, proceed in accordance with the

instructions below:

1) The instrument should be installed by a competent operator following the installation

diagrams carefully

2) The instrument should be installed in a panel from which no access can be gained to

the terminals after installation

3) Do not power or connect the instrument if any part of it is damaged

4) The electrical system of the building in which the instrument is to be installed should

have a switch and a protective device against over-currents

5) The instrument is designed for installations with over-voltage category III and

pollution level 2, in accordance with the EN 61010-1 standard.

Code Model Description

VP810600 LCR048 Liquid-levelcontrolrelay24/48V

VP809800 LCR230 Liquid-levelcontrolrelay115/230V

VP808000 LCR400 Liquid-levelcontrolrelay400V

TECHNICAL SPECIFICATIONS

• Powersupply:24/48/115/230/400V~(-15%÷+10%),50/60Hz

• Absorption:3,5VA(2,5W)

• Termination:6mm2block

• Output:relaywithexchangecontact8A/250V~

maximumswitchablepower2000VAcos = 1

• Numberofprobesapplicable:3

• Probeoutputvoltage:8V~(betweentheelectrodes)

• Probesensitivity:4÷30k adjustable

• Signaling:

 –GreenLED:poweron

 –RedLED:relayintervention

• Operatingtemperature:–5°C÷+50°C

• Storagetemperature:–10°C÷+70°C

• Humidity:20%÷90%non-condensing

• Insulation:powersupply,loadandprobecircuitsinsulatedgalvanicallyatreinforced

insulationinaccordancewiththeEN61010-1standard

• Container:4-moduleDIN,colourRAL-7035grey

• Casingmaterial:serf-extinguishinginclassV0,inaccordancewiththeUL-94standard

• Degreeofprotection:IP20/IP40whencorrectlyinstalledinanelectricalpanel

OPERATION

• Thesensitivityoftherelaycanbeadjustedbetween4and30k usingthe

“sensitivity”

trimmer,inordertoadaptittotheconductionvalueoftheliquidtobecontrolledduring

theinstallationstage.

• Forthecorrectoperationoftherelay,terminal10,withitsownelectrodeifnecessary,

shouldbeconnectedtoearth.

• Theconductorsthatconnecttherelaytotheelectrodesshouldifpossiblebekeptseparate

fromthepowercables,especiallywherelongdistancesareinvolved.

 Ifthisisnotpossible,werecommendusingscreenedcables.

MINIMUM (WITH PROTECTION AGAINST DRY RUNNING)

AND MAXIMUM LEVEL CONTROLS

Filling a tank

using contact 16-17 (NC at rest) of the relay

• Intheconditionswiththetankempty,theelectrodesarnotsubmergedandtheoutput

relayisde-energised.

• Thepumpwillcomeintoactionassoonasithasbeenstartedupbyitscommands,andwill

continuethellingoperationuntiltheliquidreachesthemaximumlevel,ascontrolledby

the

MAX

electrode.

• Atthispoint,theoutputrealywillbeexcitedandcontact16-17willswitch(seethe

“Operatingdiagram1”).

Emptying a tank

using contact 16-18 (NC at rest) of the relay

• Intheconditionswiththetankfull,theelectrodesarsubmergedandtheoutputrelayis

excited.

• Thepumpwillcomeintoactionassoonasithasbeenstartedupbyitscommands,andwill

continuetheemptyingoperationuntiltheliquidreachestheminimumlevel,ascontrolled

bythe

MIN

electrode.

• Atthispoint,theoutputrelaywillbede-energisedandcontact16-17willswitch(seethe

“Operatingdiagram1”).

CONTROLLING A SINGLE LIQUID LEVEL (WARNING THRESHOLD)

• Theoutputrelaywillexciteeachtimetheliquidreachesthelevelcontrolledbythe

LEVEL

electrode.

• Theoperationwilltakeplaceinreverseassoonastheelectrodeisnolongersubmerged

intheliquid,asthereisnoself-poweringoftherelaywiththistypeofcontrol(seethe

“Operatingdiagram2”.

REFERENCE STANDARDS

ConformitytotheEUdirectives:

2006/95/EC(LowVoltage)

89/336/EECmodiedby92/31/EECand93/68/EEC(EMC)

isdeclaredwithreferencetothefollowingharmonisedstandards:

Safety:

EN61010-1

Electromagnetic compatibility:

EN61000-6-2,EN61000-6-4

Dimensions

Connection diagram

60 72

Sensibility

Relay

LCR

LCR048

LCR230

GND MAX MIN

COM

LCR048

LCR230

GND MAX

MIN

COM

LCR400

Operating diagram 1

Operating diagram 2

Terminal 11

Terminal 12

Terminal 13

MAX

MIN

COM (*)

(*) Only in the case of

non-metallic tanks and wells.

Power

supply

Com./Min

Probe

Com./Max

Probe

Relay

Power

supply

Com./Min

Probe

Relay

Terminal 11

Terminal 13

LIVEL

COM (*)

(*) Only in the case of

non-metallic tanks and wells

Warning

level

Warning

level

Warning

level

Minimum (with protection against dry running)

and maximum level controls

Control of a single liquid level (warning level)

USE

Theoperatingprincipleisbasedonthevariationintheresistancevalueoftheliquid,detectedbymeansof2or3electrodes,dependingonwhethertheconstructionmaterialsofthewellsandtanksis

metallicornot.Thisdevice,coupledtosuitableelectrodesandinsertedinthecommandcircuitofpumpingsystemstokeepthelevelinthewellsandaccumulatortanksatthelevelsset,atthesame

timeguaranteeingtheprotectionofthesubmergedpumpsagainstdryrunning.Therelaycanalsobeusedasanalarmdeviceforthedetectionoftheminimumandmaximumlevelsoftheliquidsto

becontrolled,orasaprotectiondeviceforthedetectionofthepresenceorabsenceoftheliquid.

Applications (A)

Applications (B)

MIN

MAX

Warning Level

Common

Keeps the liquid level in the tank supplied between the two fixed points

(Max/Min), with alarm for excess level.

Tank Being Filled

Well/Tank Emptying

Power Supply 1-2-3