T4500 Auto Synchronizer•Automaticsynchronizationwithrelay

outputsforspeedcontrol•Adjustabledeltafrequencyanddelta

voltage•Adjustablebreakermaketime•Visualindicationofbusvoltage,

generatorvoltage,closingsignal,deltavoltage,increaseanddecreasesignals

•Automaticvoltagematching•Costeffectiveandhighlyreliable

design•50hoursburn-inbeforefinaltest•Operatingtemperaturerange:

-20°Cto+70°C•Vibrationtestupto4g(5-100Hz)•Certifiedbymajorclassification

societies•Flameretardantenclosure•DINrailorscrewmounting

ApplicationTheT4500AutoSynchronizerprovidesautomaticsynchronizationofanincominggeneratortoabusbarinaminimumoftime,bycontrollingthespeedviatheelectricservomotoronaconventionalspeedgovernor,orbycontrollinganelectronicspeedcontrol-lerviaanintermediatemotorizedpotentiometer.

TogetherwiththeT4800LoadSharer,theT4500providestheoptimalsolutionforgeneratorcontrol,bothinmarineandland-basedapplications.TheT4500istypeapprovedbymajormarineclassificationsocieties.

FunctionTheT4500measuresthevoltageacrosstwophasesoneithersideofthecircuitbreakerinordertoobtaindataonvoltage,frequencyandphasedifferenceforclosingthecircuitbreakeratexactphaseaccordance.

Thesynchronizationfunctionwillbecomeactivewhenthedifferencebetweenthebusvoltageandthegeneratorvoltageiswithinlimits,whichisindicatedontheDVOLTLED.

Thevoltagedifferenceisselectablebetween2%to10%(seetheresistortableonpage2forselectingtheDVoltwindowvalue).Ifthevoltagedifferenceistoohigh,thevoltagematching

functionoftheunitcanbeused(seetheseparatesectiononvoltagematching).

Whenthesynchronizationfunctionisactive,theT4500willautomaticallyadjustthespeedofthegeneratorthroughthegovernorinordertomatchthefrequencytothebusbar.Twobuilt-inrelaysprovidetheincreaseanddecreasepulsesforaconventionalgovernor.Thelengthofthepulsesisproportionaltothefrequencydifference.

TheE7800MotorisedPotentiometercanbeusedtoadaptthecontactpulsestoasignal,suitableforthespeedtriminputofanelectronicspeedcontroller.

Fig. 1. Application Diagram.

TheT4500willcontinuouslyadjustthegeneratorspeeduntilthefrequencydifferenceiswithinlimits.ThefrequencydifferenceisadjustableonthefrontdialDIFF.FREQfrom0.1Hzto1.0Hz.

Beforethebreakercanbeclosedthisfrequencydifferencemust bepositive.Thereasonisthatinordertoprotectthegeneratoragainstreversepower,thegeneratorshouldcomeinataslightlyhigherfrequencythanthefrequencyofthebusbar.

Whenthevoltageandfrequencydifferencearewithinlimits,theclosingsignalwillbeactivatedjustbeforethenextphaseaccordance,anticipatingthecircuitbreakermaketime.

BUS

L 3

L 2

1L

C/B

SYNC.

ON

FREQ.

1

BUS

2 3

DIFF.

Hz.

0.1

VOLT PROGAMMING

17 1918

0.4

GEN.

C/B. MAKE TIME

4 5

201.0

6 87

200

MILLI. SEC.

22

80

2120

0.7

2423

140

GEN.

M

OUT.

FREQ.

AUTO-SYNCHRONIZERT4500

109

CLOSE

ABLE COM.

1211

DIS-

VOLT OK

2625 27 28

1513 14

INCR.

ACTIVE

16

DECR.

31

VOLTAGE

MATCHING

INCR.

29 30

DECR.

32

BUS

Fig. 2. Voltage matching.

ThecircuitbreakermaketimeshouldbesetonthefrontdialC/BMAKETIMEaccordingtothespecificationsofthecircuitbreaker.TheT4500compensa-tesforthismaketimesothatthecircuitbreakerwillcloseexactlyatzerophase.

Thecircuitbreakerclosingsignalisapulsesignalof0.7secondsdurationatterminals9and10(CLOSE).Aconnec-tionbetweenterminals11and12(DISABLE)willdisabletheclosingsignal,butwillnotinfluencetheautomaticfrequencyalignment.

Whencommissioning,itisrecommen-dedtodisabletheclosingsignalwiththisconnection.CheckthattheclosingsignalindicatedontheRELAYLEDisatphaseaccordance.

Synchronizing between busbarsAuniquefeatureoftheT4500isthepossibilityofsimultaneoussynchroni-zationofalreadyparallelrunninggeneratorstoanotherbusbarsection,ashaftgeneratororthegrid.

Anoutputfromterminals12(COM)and13(FREQ.OUT)connectedtotheterminals12(COM)and29(FREQ.IN)onalltheT4800LoadSharers,willallowthefrequencytobealignedforsynchronizing.Seeapplicationdiagramfigure5.

Voltage matchingInsituationswherethevoltagedifferenceistoohighforobtainingsynchronization,thevoltagematchingfunctioncanbeused.

Thevoltagematchingworksasfollows:Whenthegeneratorcomesonvoltageandthebusbarvoltageispresent,adelayof4secondsallowsthegeneratorvoltagetostabilize,beforethevoltageadjustmenttakesplace.

Ifthegeneratorvoltageisoutsidelimits,arelayforincrease(terminals29and30-INCR.)andarelayfordecrease(terminals31and32-DECR.)areactivateduntilgeneratorvoltageiswithinlimits.

Fig. 3. Application Diagram. Synchronization and load sharing with T4500 and T4800 using conventional governors.

TheSELCOE7800MotorizedPotentiometercanbeusedasanintermediateunitbetweentheT4500andtheAVR(AutomiaticVoltageRegulator).Seefigure2.

Resistor table for selecting the DVolt windowResistorstobeconnectedbetweenterminals17and18.10% = 0W default(link)9% = 10kW8% = 18kW7% = 33kW6% = 82kW5% = 100kW4% = 270kW3% = 470kW2% = noconnection

Fig. 5. Application Diagram. Synchronizing two generators on load sharing to the grid with T4500.

SYNCHRONIZERT4500

LOAD SHARERT4800

LOAD SHARERT4800

GRID

BUS

Fig. 4. Application Diagram. Synchronization and load sharing with T4500, T4800 and E7800 using electronic governors.

ELEC.GOV.

WITH DROOP

E7800

ELEC.GOV.

1 2 3

4

5

6E7800

WITH DROOP

1 2 3

4

5

6

BUS

Max. voltage 660VVoltage range 70 - 110%Consumption 4VA at UN Frequency range 35 - 70HzFrequency difference 0.1 - 1.0HzC/B make time 20 - 200msVoltage difference 2 - 10%Contact rating AC: 400V, 2A, 250VA DC: 110V, 2A, 100WOperating temperature -20 to +70°CVibration test 4g (500-100 Hz)EMC CE according to EN50081-1, EN50082-1, EN50081-2, EN50082-2Approvals Certified by major classification societiesBurn-in 50 hours before final testEnclosure material Polycarbonate, flame retardantWeight 0.7kgDimensions 70 x 150 x 115 mm (H x W x D) Installation 35 DIN rail or two 4mm (3/16”) screws

The specifications are subject to change without notice.

Type Selection TableType Terminal 1-3 2-3 5-7 6-7T4500.0010 450V 400V T4500.0020 230V T4500.0030 480V 415V T4500.0040 110V 63V T4500.0050 127V 120V T4500.0060 110V 100V T4500.0070 600V

Other supply voltages and combinations are available on request.

SpecificationsT4500 Auto Synchronizer

Type Approvals and Certificates

TheT4500hasbeendesignedandtestedforuseinharshenvironments.Theunitisbasedonstandardcomponents,pro-vidinglongtermdurability.TheT4500carriestheCElabelandhasbeenapprovedbythefollowingmarineclassificationsocieties:

American Bureau of ShippingBureau Veritas

Croatian Register of ShippingGermanischer Lloyd

Korean Register of ShippingPolish Register of Shipping

Romanian Register of ShippingRussian Maritime Register of Shipping

Fig. 6. Dimensions.

150

5010

7.5 135

115

70Dimensions in mm.

Fixing holes2 x ø 4.5 mm.

Main Office:SELCOA/SBetonvej10DK-4000RoskildeDenmarkPhone:+45-70261122Fax:+45-70262522e-mail:selco.dk@selco.comwww.selco.com

T45

95-6

3E