tristör

8/11/2019 tristr

1/5

www.libratherm.com Certificate No. IND86208

Thyristor Power Controllers for Resistance Heaters and Transformer loads(ProductCode21.3)

POW-2-CL POW-3S POW-3D-6-CL

Partners In Measurement And Control

401/402, Diamond Industrial Estate, Ketki Pada Road, Dahisar east, Mumbai 400068, Maharashtra, India.

Tel/Fax: 91-22-28963823, 28960569, 28964769. Email: [email protected] [email protected]

1

8/11/2019 tristr

2/5


Model Wise Descriptions:

Sr.No Model ProductDescription

21.3.1

POW-1

SinglePhase

SCR

Power

Controller

for

single

phase

heaters

21.3.2 POW-1-CLSinglePhaseSCRPowerControllerforsinglephaseheaterswithcurrent

limitandcurrenttripfeatures.

21.3.3 POW-2 TwoPhaseSCRPowerControllerfortwophaseheaters

21.3.4 POW-2-CLTwo PhaseSCRPowerControllerfortwophaseheaterswithcurrent

limitandcurrenttripfeatures.

21.3.5 POW-3S-4ThreePhaseSCRPowerController suitablefor3phase heaters

connectedin 4wireStarwithneutralconfiguration.

21.3.6 POW-3S-3ThreePhaseSCRPowerController suitablefor3phaseheaters

connected in 3wireStarwithoutneutral configuration.

21.3.7 POW-3S-4-CL

ThreePhaseSCRPowerController suitablefor3phaseheaters

connectedin 4wireStarwithneutralconfigurationwithcurrentlimit

andcurrenttripfeatures.

21.3.8 POW-3S-3-CL


connectedin3wireStarwithoutneutralconfigurationwithcurrentlimit

andcurrenttripfeatures.

21.3.9 POW-3D-6ThreePhaseSCRPowerController suitablefor3phaseheaters

connectedinopenDelta 6wireconfiguration

21.3.10 POW-3D-6-CL


connectedinopenDelta 6wireconfigurationwithcurrentlimitand

currenttripfeatures.

21.3.11 POW-3D-3ThreePhaseSCRPowerController suitablefor3phaseheaters

connectedin closeDelta 3wireconfiguration

21.3.12

POW-3D-3-CL


connectedincloseDelta 3wireconfigurationwithcurrentlimitand

currenttripfeatures.

Note:Forsinglephaseheaterswithin8KWourlowcostmodelLTC-16givenin 21.2canbeconsidered.

Features:

15Ampsto350Ampscapacity(1KWto180KW).

Singlephase/2phase/3phaseversions.

Suitablefor 3or4wirestarconfiguration/3or6 wiredeltaconfiguration.

Auto/Manualoperation.

Accepts(4-20)mA/(0-5)VDC/(0-10)VDCcontrolinput.

Softstartforsmoothcontrol.

Adjustablepowerandcurrentlimit.

Isolatedheatsinkforsafety.

SimpleandModulardesignforeasyservicingof cardsandthyristors.

Ideallysuitableforresistive,transformer,inductiveorheatingloadslikeSiliconeCarbideandMolybdenum

whichexhibitssignificantchangesofresistancewithincreaseintemperature.

Otherfeatureslikepartialloadfailuredetectioncanalsobeoptionallyprovided




2

8/11/2019 tristr

3/5


Application:

Thyristor Power Pack has a varied application and can be used with heating elements like Kanthal, Super

Kanthal, SiliconCarbide,Molybdenum, InfraRed,etc.wherepreciseandaccuratepowercontrol is required.

Thereis

significant

power

savings

with

respect

to

conventional

contactor

type

temperature

control

system,whichalsodependsonvariousotherfactors.

Description of Thyristor Power Controller:

Libratherm offers ready to use SCR power controller for electrical heating loads ranging from

3 KW/Single phase to 300KW/3-phase. This power packmodule comprises of suitable triggering card

model LTC-12or LTC-13orLTC-15, suitablyratedbackto backconnected SCRmodule (with electrically

isolated base)-mounted on theappropriatelyratedheat sink (naturalairor forced aircool), inputand

outputclip-ontypeheavydutyconnectorsorcopperbusbars,semiconductor fusesandthermalcutouts.

TheentireassemblyismountedonMSpowdercoatedplate,whichinturncanbeeasilymounted inside

theclosed controlpanelasdesired. Complete readytousecontrolpanelwith suitablePID /Program

temperaturecontrollercanalsobesuppliedaspertheusersspecificationsandrequirement.

Technical Specifications:

Available Ratings 3KWSinglephaseto600KWThreephase

Available

Configuration

Singlephase,Twophase,Threephase(3or4wirestarand 3or6wire

delta)

Control Action Phaseanglecontrol(selfsynchronized)

Control Signal (4-20)mA/(0-5)VDC/(0-10)VDC/Potentiometer

Output

0to230VACor0to415VACvariablevoltageproportionaltothecontrolsignal.

Smooth ControlAdjustableRampUpandRampDownTimeforsoftincreaseand

decreaseofoutputvoltage.(Settableintherangeof2to20seconds

Current Control UsingoncardCurrentLimitandTripsettings.(LTC-13andCLM-15)

Settings Foradjustingvoltageandcurrentperphaseusingoncardpresets

LoadTypeSuitableforbothresistiveandinductive/transformerload

(15Ato500A@110/230/415 VAC)

Supply Voltage

120/240/380/415VAC,50/60Hz.(Usershouldspecify)

Available Models As givenintheabovetable(UnderModelwisedescription)

Other accessories

provided with each

power pack

a)Semiconductorfuseperphasetoprotectthyristorsagainstshort

circuitcondition.RCsnubber/MOVacrosstheSCRstoprotectagainsttransients.

b)Thermalcutoutswitchontheheatsinktoprotectthyristors

againstoverheating

c)Coolingfanonheatsinksforthyristorsabove50Ampere

d)Heavydutyinput/outputterminalsorCopperBusbarsforsupply

andheater Connections.

Size (Power Pack) AsperStd.(Sizescanbegivenonrequestbasedonthemodel)

Mounting Powerpackcanbemountedonthebaseplateofthecontrolpanel




3

8/11/2019 tristr

4/5


KW (Kilowatt) wise selection table for resistance heaters or transformer loads:

POW-3D-6LoadCurrent per POW-3S

POW-1 POW-2 POW-3D-3phasetoNeutralor POW-3S-3

@230VAC @415VAC @415VACPhase1toPhase2 @415VAC

(VXI)KW (VXI)KW (VXIX3)KWAMPS (VXIX3)KW

(VXIX1.732)KW

25A 6-30KW1-5KW 2-10KW 3-15KW

(27ASCRmodule) 3-17KW

50A 31-60KW6-10KW 11-20KW 16-30KW

(57ASCRmodule) 1833KW

90A 61-108KW11-18KW 21-36KW 31-54KW


100A 109-120KW1920KW 37-40KW 55-60KW(106ASCRmodule) 6369KW

150A 121-180KW2130KW 41-60KW 61-90KW


200A 181-240KW31-40KW 61-80KW 91-120KW


250A 241-300KW41-50KW 81-100KW 121-150KW


300A 301-360KW51-60KW 101-120KW 151-180KW


400A 361-480KW61-80KW 121-160KW 181-240KW


500A 481-600KW81-100KW 161-200KW 241-300KW


Usercanselecttherequiredpowerpackeitherbyactualcurrentthroughthe heatersorby

KWoftheheaters.

Singlephase,twophaseorthreephaseselectioncanbedonebyselecting appropriatemodel

basedonthedesiredconfiguration, fromthetablegivenabove.

Iftheheatersaredesignedatdifferentvoltageotherthan230VAC or415VAC,stillthe

selectioncanbemade,basedontheactualcurrentflowingthroughtheheatersatthe

desiredvoltagelevel.

Forinductive/transformerload,thedesiredKWcanbeselectedasperthe requirement.

For3wirecloseddeltaconfiguration,thelinecurrentshouldbetakenintoconsiderationand

nottheloadcurrent.PowerpackshouldbechosenwithLinecurrentof1.73xloadcurrent.

Forexample:Ifloadcurrentis50Athenlinecurrentwillbe86.5A,sothyristor mustbe

chosenof90A.




4

8/11/2019 tristr

5/5


Ordering Information:

MODEL A-INPUTCONTROLSIGNALB-CURRENT(PhasetoNeutral)

or(Phase1toPhase2)

POW-1

POW-1-CL

POW-2

POW-2-CL

POW-3S-4

POW-3S-3

POW-3S-4-CL

POW-3S-3-CL

POW-3D-6

POW-3D-3

POW-3D-6-CL

POW-3D-3-CL

A1-(0-5VDC)

A2-(0-10VDC)

A3-(4-20mA)

A4- Allabovebutuserselectableusing

DIPswitchselection

Variablesignalthroughexternal

potentiometerisavailableinall

models.

B1-25A

B2-50A

B3-90A

B4-100A

B5-150A

B6-200A

B7-250A

B8-300A

B9-400A

B10-500A

Examples:

MODEL A-INPUTCONTROLSIGNALB-CURRENT(PhasetoNeutral)

or(Phase1toPhase2)

POW-1 A1 B2

POW-2-CL A3 B5

POW-3S A3 B4

POW-3D-3-CL A2 B7

Example OrderingCode Description

1 POW-1-A1-B2Thisissinglephase ACpowerpack with0-5VDCcontrolSignalsuitableformaximum10KW@230VAC, ormax.50A@

230VAC,singlephaseheaterload.

2 POW-2-CL-A3-B5

Thisistwo phase ACpowerpack with4-20mAcontrol

signalsuitableformaximum60KW@415VAC,or150A@415VAC

twophaseheaterload.

3 POW-3S-4-A3-B4

Thisisthreephase ACpowerpack with4-20mAcontrol

signalsuitableformaximum60KW@415VAC, threephaseheater

loadconnectedin4wirestarwithneutralconfiguration.

Maximum20KWor100Acurrentperphasetoneutral.

4 POW-3D-3-CL-A2-B7

Thisisthreephase ACpowerpack with0-10VDCcontrol

signalsuitableformaximum172KW@415VAC, threephase

heaterloadconnectedin3wireclosedelta configuration. Maximum 57KW betweentwophaseor 140Acurrentperphase

tophase(orlinecurrentof140x1.732=242Amps)




5

tristör

Documents