Instruction Manual IM02607003E AutoVAR 300 Automatically .
Instruction Manual IM02607003EEffective July 2019 AutoVAR 300 automaticallyswitched capacitor bankInstallation, operation, and maintenance manualContentsDescriptionPageInstallation overview . . . . . . . . . . . . . . . . . . . . . . . 2Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Electrical system connections . . . . . . . . . . . . . . . 5Controller setup procedure . . . . . . . . . . . . . . . . . . 6Startup and commissioning . . . . . . . . . . . . . . . . . 6Controller setup procedure . . . . . . . . . . . . . . . . . . 7Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 11Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Drawings, major components, andspare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019WARNINGFAILURE TO INSTALL THE AUTOVAR IN ACCORDANCE WITH THESEINSTRUCTIONS MAY CAUSE DAMAGE TO THE EQUIPMENT AND/ORPERSONAL INJURY.WARNINGINCOMING POWER SHOULD BE DISCONNECTED BEFORE MAKING ANYWIRING CONNECTIONS.WARNINGAFTER ALL RIGGING, SETTING, AND WIRING HAS BEEN COMPLETEDAND BEFORE THE POWER TO THE AUTOVAR IS ENERGIZED, THEINTERIOR OF THE UNIT SHOULD BE CLEARED OF ANY METALEQUIPMENT, METAL SHAVINGS, TOOLS, AND OTHER DEBRIS.Installation overviewThe installation of the AutoVAR consists of the following steps:1. Setting the cabinet(s) in place.2. Connecting the assembly to the electrical system.3. Installing the current transformer on the system (checking CTpolarity) and terminating secondary in the unit.4. Programming the controller.5. Starting and ensuring proper operation.Current transformer installation instructionsWARNINGFOLLOW ALL SAFETY PRECAUTIONS AND REGULATIONS FOR WORKINGON ELECTRICAL SYSTEMS RATED UP TO 600 V. ALWAYS WEARAPPROPRIATE PERSONAL PROTECTIVE EQUIPMENT (PPE). FOLLOWALL LOCK-OUT TAG-OUT PROCEDURES.WARNINGWHEN THE FRONT DOOR IS OPENED WITH THE MAIN DISCONNECTSCLOSED, THE POWER DISTRIBUTION BLOCKS, CAPACITOR FUSES,CAPACITOR CONTACTOR UPPER TERMINALS, AND CONTROLTRANSFORMER FUSES ARE ENERGIZED AT LINE VOLTAGE. ONLYQUALIFIED PERSONNEL SHOULD HAVE ACCESS TO THE CABINETINTERIOR.WARNINGFAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT INMALFUNCTION OF THE EQUIPMENT. WARNINGA current transformer (CT) is required for operation of anautomatically switched capacitor bank.If an order for the CT was placed on Eaton to supply a currenttransformer with the order, it is included within your unit. Unlessspecified otherwise, Eaton will supply our standard CT, which is amulti-ratio multi-tap split core CT rated from 300 A to 3000 A with5 A secondary output and is rated for 600 V insulation class.AFTER DE-ENERGIZING THE UNIT, WAIT ONE (1) MINUTE BEFOREOPENING THE FRONT DOOR.If supplied, the low-voltage CTs are 600 V insulation class. The CT is to be installed on “A-phase” of the main serviceentrance and wired to the terminal block TB1, terminals 1 and 2of the capacitor bank. See Figure 3. The CT should always be installed upstream of the loads andcapacitor bank. CT shall not be installed on the feeder feeding the capacitor bank. CT polarity must be observed accurately for proper functioning ofthe capacitor bank. H1 should always face the source (utility) side.See Figure 1. CT rating determined by the mains service entrance rating.If exact rating is not available, select the next higher appropriaterating. If only the transformer rating is known, use the following formulato calculate the maximum current:Current for CT rating 2EATON www.eaton.comtransformer kVA x 10001.732 x line voltage
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019Table 1. Terminal connections for appropriate CT current ratingCT secondary terminalsCT ampere 1000800500300The CT secondary rating for all the taps is 5 A. To calculate theCT ratio, use the CT primary ampere rating and divide by 5 to getthe CT �For example, for X1–X5 the CT ratio is 600 ( 3000/5).CAPACITOR /LOAD SIDEUTILITY /SOURCE SIDEH2H11.63”Figure 1. CT placement schematicEATON www.eaton.com3
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019PositioningPosition the unit so that:1. Natural ventilation is not impeded.2. Ambient temperature does not exceed 104 F (40 C).3. Spacing complies with the National Electrical Code (NEC ).6666Figure 2. Position of the unitNNote: No more than three barriers, including the floor or overhead, shallrestrict free air circulation when units are placed side by side. A minimumdistance of 12 inches should be maintained between the two enclosures.4EATON www.eaton.com6
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019Electrical system connectionsWhen connecting the unit to the power system, the ground lugmust be grounded and all applicable NEC codes must be followed.The AutoVAR must be connected as shown in Figure 3. The lugsthat accommodate the incoming conductors are located on the busbars on the right side of the cabinet. If the unit is supplied witha disconnect, the incoming conductors are connected directly tothe disconnect’s line lugs. The lugs shall be torqued as indicatedon these devices.Fused disconnectsFused disconnects should be sized no less than 165% of the ratedcapacitor current.Circuit breakerThe circuit breaker should be sized no less than 135% of the ratedcapacitor current.NNote: Rated capacitor current (1000 x kvar) / ( 3 x voltage) (amps)Where: V oltage line-to-line voltagekvar Three-phase kvar rating of capacitor (nameplate rating)Example: 5 00 kvar capacitor, 480 V system:Rated capacitor current (500 x 1000) / ( 3 x 480) 601 AThe breaker shall be rated to carry the 601 A x 135% or 811 Acontinuously in its operating environment. In this case, therefore,a 1000 A 100% rated breaker will be required as a minimum.Conductor ampacityNEC Article 460 specifies that the ampacity of capacitor conductorsbe rated at 135% of rated capacitor current. Our UL listed unitsrequire that only 90 C copper conductors be used at their 75 Campacity rating to supply the units. The ampacity should be deratedas necessary for ambient temperature (see NEC).CTFROMUTILITYMETERINGSTATIONPHASE AHITAP 1TOPLANTLOADTAP 2PHASE BPHASE CBP HASE CP HASE AAP HASE BSERVICETRANSFORMEROR SUBSTATION( IF APPLICABLE)C21TB1AUTOVARFigure 3. Connection schematicNNote: Refer to the CT tap setting, Table 2, on page 6.EATON www.eaton.com5
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019Controller setup procedureCT placementCurrent transformer placement and connectionThe placement of the CT is critical to the proper operation of theAutoVAR. Improper location and phasing of the CT causes morestartup problems than any other error.WARNINGTHE CT TERMINALS MUST ALWAYS BE SHORT-CIRCUITED DURINGINSTALLATION, REMOVAL, OR AT ANY OTHER TIME WHEN THE CT MAYBECOME OPEN CIRCUITED. THE CT IS SHORTED BY “JUMPERING”ANY TWO “X” TAPS OF THE CT TOGETHER. A CT SHORTING TERMINALBLOCK (CAN BE PROVIDED AS OPTIONAL) MUST BE INSTALLED NEARTHE LOCATION OF THE CT.A CT JUMPER MUST BE USED WITH ANY FUTURE ADJUSTMENTSTO THE CT OR ANY REMOVAL OF THE CT CONNECTIONS AT THECONTROLLER.CT tap settingThe CT is the current sensor required by the controller and isinstalled around the Service Entrance. The CT tap settings (CT ratio)therefore are to be selected so that it can handle the maximum loadcurrent that it will see. The easiest way to size the CT is to size it tothe same ampacity as the service entrance rating.If the maximum load current (MLC) of the plant is not known but thetransformer kVA rating is known, then use the following formula:Maximum load currentWhere: (kVA x 1000)/( 3 x V) (kVA x 577)/(V)(Amps)(Amps)kVA kVA of service transformerV line-to-line voltageExample: 480 V 1000 kVA entrance XFMRMLC (1000 x 577)/480 1200 AOnce the maximum load current is known, the CT tap setting isdetermined by comparing the actual MLC to the values in the thirdcolumn of Table 2. The taps corresponding to the closest higher valueshould be used.Table 2. CT tap setting3000:5 Multi-ratio CT (039010-0006V)Tap 1Tap 2MLC amps: 5 amps (CT 0:56EATON www.eaton.comAs shown in Figure 3, the CT must be placed upstream of theAutoVAR power connections preferably on phase A of the mainincoming bus. In other words, place the CT so that it “sees” theentire plant load, including the AutoVAR and any other capacitors.The high side of the CT (marked “H1”) must face the utility source.After the CT has been placed on the main incoming bus, the interconnects from the CT secondary should be terminated on theterminal strip (TB) pins #1 and #2 (located on the inside left panel ofthe capacitor cabinet). The CT shorting strap may then be removed.CT cabling and connectionsCT wires should be minimum #12 AWG up to 100 ft of wire lengthand #10 AWG up to 150 ft. CT wires will be routed separately thanthe power conductors and if not routed in a metal conduit, will beof shielded type cable. The length and gauge of wire is applicablefor up to ANSI C57 B-0.5 burden. CT lead resistance will be keptto a minimum and calculated at expected overload capacity ofup to 120%.If CT signal is shared with other equipment, ensure that the VAburden does not exceed the CT accuracy requirement and CTleads first land on the PFC controller.If the CT ratio does not accurately match the expected full loadcurrent, please contact the factory.The AutoVAR electrical connections are now complete.Startup and commissioningON/OFF switchEnsure the ON/OFF switch located on the door is in the OFFposition. The upstream or (optional integral) disconnect or circuitbreaker can now be closed to energize the unit. Once energized,turn the ON/OFF switch to the ON position and the unit is readyto begin operation as indicated by the illuminated light within theON/OFF switch.Blown fuse indicator lightsThe indication lights on the door are blown fuse indicator lights thatturn on when a power fuse inside the unit clears.Manual operationRefer to the controller operation section on page 7 for energizingthe capacitor bank in manual mode.You are now ready to set the controller.
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019Controller setup procedureInstructions henceforth are only applicable for the factory standard (default) controller. For Option C controller,please refer to the separately included instructions on Modbus enabled controller.Eaton BLR-CX Plus quick commissioning guideScreen or databaseAutomatic modeManual modeSetup modeBlinking during alarmSecond target-pf is activeExport of active energyCapacitor stage number indicationFigure 4. Digital displayOperationOperation of BLR-CX Plus is done by 4 keys.Figure 5. Operational keys(right / Enter) key allows selection, entering the edit mode or accepts the edited values. In edit mode, the(left / esc) key or Outside of edit mode, the Press and hold the Pressing Submenus are scrolled through by pushing the (up) key or (down) key.(right / Enter) key scroll left and right to allow setting of the appropriate digit.(left / esc) key exits to the next higher level.(left / esc) key for approximately 3 seconds to silence any alarms.EATON www.eaton.com7
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019Measurement ModeU Voltage ULL (V) U Voltage ULN (V) I Current (A) P active power (W) Q reactive power (VAR) Q reactive power to target S apparent power (VA) THD U Har U (3rd harmonic U) Har U (5th harmonic U) Har U (7th harmonic U).Har U (19th harmonic U) COS Phi (displacement power factor) PF (kW/kVA) APF (average power factor) F (frequency) t (temperature) thi (maximum temperature) OPh (operation hours)Main screenINFONote: Pressing the down arrow will take theuser back to the top of the list.Manual Mode Manual screen 1 (Step 1) ON OFF 2 (Step 2) ON OFF 3 (Step 3) ON OFF.13 (Step 13) ON OFF 14 (Step 14) ON OFF Push the right arrowkey for 3–5 seconds.Note: Pressing the down arrow again after 14(Step 14) will take the user back to 1 (Step 1).Basic Programming Mode(100 level menu)Push the right arrowkey for 1 second.Push the right arrowkey for 3–5 seconds.Setup screenBasic programming screenSetup Advanced Programming Mode(200–600 level menuspush key for 3–5 secondsUn (nominal voltage ULL) CT (CT ratio) PT (PT or VT ratio) Ai (automatic initializing) PFC (power factor control on/off) CP1 (target power factor) St (switching time delay) Out (outputs) aa Firmware version dependent.Note: Pressing the down arrow key after Outwill take the user back to the top of the list.Figure 6. Menu map8EATON www.eaton.com
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019Programming the controllerOverviewStep 1BLR-CX Plus is factory preset to the default values shown inTable 3. Customer to program and verify the values set tomeet the specific conditions of each installation.The ‘i” at the end indicates an inductive power factor and wouldbe appropriate for most installations. A “c” at the end indicatescapacitive power factor and suggests reactive power export andmay not be appropriate. Refer to the troubleshooting section forresolution steps.Step 3The next step is to verify the measured values.From the main screen, press the ( right / Enter) key to enterthe Measurement mode. See menu map for a list of designatedparameters. Upon power on the controller displays the existing power factorvalue “X.XX i” and enters the Automatic Control mode. Press the (left / esc) key to return to the main screen that displaysthe existing PF.Step 2Next step is to set up the basic parameters in the controller.Step 4UnNominal voltage (factory programmed, customer may verify)CtCT-ratio (factory set to 600, which corresponds to 3000:5current transformer ratio. Changing the CT ratio willchange the capacitor step sizes in 402 and those valueswill have to be re-programmed.NNote: The steps will switch on only after the factory set capacitor stagedischarge time has elapsed.PtPT-ratio (factory programmed)AiStart of automatic initialization (factory programmed) From the main screen, press the (down) key to step throughthe “INFO”, “MANUAL” and to “SETUP” mode. When “SETUP”is shown, press the ( right /Enter) key to enter the Menu 100.Press the ( right /Enter) key and program and or verify thefollowing values.PFC PF-control ON/OFF/ HOLD (factory programmed)StAfter each manual operation of the stage, the PF should change inthe right direction (for example, 0.70 i 0.78 i 0.85 i ).If the PF changes in the right direction, the capacitor bank has beencorrectly commissioned. If not, please refer to the troubleshootingsection.To switch the controller in manual control mode, press the (down)key to step through the “INFO” mode to “MANUAL” mode. Pressand hold the ( right /Enter) key for approximately 3 seconds until“1” displays, indicating the stage number 1 is available for control. CP1 Target-PF (customer to program)The final programming step is to verify the working of the capacitorbank. This is done by activating the controller in manual controlmode and cycling through all the available steps.Switching time delay (factory programmed, customermay verify) Once the Menu 100 is programmed, press the (left / esc)key three times to return to the main screen that displays theexisting PF.NNote: In manual mode, the controller freezes the stages in their existing state(ON, OFF, or HOLD). Therefore, it is important to ensure that at the end ofthis Step 4, the controller is returned back to the automatic control mode bypressing the (left / esc) key to return to the main screen that displays theexisting PF. Out Output type of each stage (Auto/Alarm/Fixed Off/Fixed On)(factory programmed, customer may verify)After activating all available steps, one should make note of thedisplayed PF value as that reading should be greater than or equal tothe target PF desired. If the displayed PF with the electrical systemfully loaded and all steps energized is less than the target PF, thenthe selected capacitor bank is not sized adequately to raise the PF tothe desired value. The customer should either upgrade the capacityof the capacitor bank or the target PF value should be decreased toprevent “PF alarms”.EATON www.eaton.com9
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019Menu structureThe following table provides an overview about the basic and advanced programming parameters of BLR-CX Plus.Menu 100 is the Basic Menu. Menu 200 through 800 is for advanced users only and requires a PIN access (242).The settings in these submenus should only be accessed and changed after consulting with Eaton. Menu 700 isModbus setting menu. It is only available on capacitor banks with the “C” suffix.Table 3. Programming mode detailed menu mapMenu100FunctionQuick start setupDefaultUnNominal voltage t automatic initializingStart/Stop/Hold PF-controlTarget-PF 1Switching time delayType of each step (1, 2, 3 12)208 V / 240 V /480 V / 600 V600 (corresponds to3000:5 CT ratio)1.7 (240 V unit)3.7 (480 V unit)4.7 (600 V unit)NOn0.95i60 sAuto (for each stepinstalled in unit),Fixed Off (for unusedcontroller outputs)200Setup measuring system201Nominal voltage 209Tolerance nominal voltageVoltage measuringPhase-offsetStart automatic initializingSynchronization to frequencyTemperature offset300Setup control system301302303304305306307Switching thresholdTarget-PF 1Target-PF 2Target-PF 2 at KW-exportSwitching time delaySwitching time delay for fine controlFine control active308309310311312313314315316Automatic Stage detectionBlock defective CapacitorsStart/Stop/Hold PF-controlControl algorithmReactive-power offsetAsymmetrical switching time delaySwitch-off capacitors in leadingconditionDistribute sw. operationsDetect faulty stages400Setup capacitor database401402Discharge timeCapacitor size: step 1 max. 1210EATON www.eaton.com208 V / 240 V /480 V / 600 V600 (corresponds to3000:5 CT ratio)1.7 (240 V unit)3.7 (480 V unit)4.7 (600 V unit)20%Y L–L90N60 (60 Hz unit)0 C55%0.95i0.95iN60 s10 sN (for units withequal stage sizes),Y (for units withmultiple stage sizes)NNOn101NNY60 sVaries (see equipmentdrawings for step size,typically 25, 50, or100 kvar capacitive)CustomersettingsMenu400FunctionSetup capacitor database,continuedDefault403Type of exit: step 1 max. 12404405406Switching operations: step 1 max. 12Operations hours counter:step 1 max. 12Fan relay as stage outputAuto (for each stepinstalled in unit),Fixed Off (for unusedcontroller outputs)00h500Setup alarm system501502503504505506507508509510511512Reset alarms manuallyTHD-U thresholdDisconnect capacitors when THD THD alarm delayStop control if I 0Service alarmMax. operations per stepMax. operation hours of BLR-ACX-VMax. operation hours per stepTHD-I thresholdDigital input logicTemp. threshold level 1 (fan control,type of exit: AL)Temp. threshold level 2, disconnectcapacitorsControl alarm (target cannot be reached)Faulty stages alarmStage power loss alarmFlashing displayDigital input functionI-Low alarm suppr.Switch off active stages if digitalinput alarmI-Low alarmI-High alarm delaySwitch-off 01602603604605606607608609Reset to default valuesReset capacitor database to defaultReset operation hoursReset average PFReset max. temperatureReset alarmInfo firmwareChange passwordRestart first setup700Modbus———Baud rateParity and stop bitsSlave address800System801802Backlight during commissioning modeBacklight delay timeNN6%N120 sNN262 k65.5 k65.5 k20%Y40 C55 CYYYNCP2YNY10 s60 sNNNNNN—242N19.2 kEVEN1N0.25 hCustomersettings
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual TroubleshootingEffective July 2019Current and voltage monitoringCAUTIONWHILE ATTEMPTING ANY TROUBLESHOOTING STEPS THAT REQUIREACCESS INTO THE CAPACITOR BANK, ALWAYS FOLLOW ALL SAFETYPRECAUTIONS AND REGULATIONS FOR WORKING ON ELECTRICALSYSTEMS. ALWAYS WEAR PROPER PPE AND FOLLOW APPROPRIATELOCK OUT AND TAG OUT PROCEDURES.Automatic control modeThe controller should display status “Auto,“which indicates that thecontroller is working in automatic mode. This is the desired mode ofoperation. If “Auto” is not displayed, then the power factor control isnot working. Reasons for this are:The controller is equipped with current and voltage monitoring toensure it is within its operating parameters. The controller will show“I LO” alarm if there is no measured current or the magnitudesensed is less than 15 mA. If the current is greater than 6 A, thecontroller will show “I Hi alarm”.If either of these alarms are displayed, check the CT current path,verifying that the correct CT ratio is selected, the CT is in the correctposition, and the current input and shorting jumpers at the terminalblock are removed.The allowed range of voltage depends on nominal voltage. Whennominal voltage is out of range, “U Alarm” is shown. If this alarmis seen, then the setting of nominal voltage has to be adjusted.Nominal Voltage is measured and entered phase to phase.Manual mode is activeCapacitor stage database Control mode has been switched off Temperature is too high (if temperature input is provided) Current from the CT is less than 15 mA Voltage is out of rangeA step fault (“STEP / FLTY”) or step low (“SPL”) alarm indicatesproblems with the sensed capacitor size. To check the capacitorstages, switch the controller into the INFO mode by pressing the (down) key. In the INFO submenu, by pressing the (up) or (down) key, the steps can be chosen and once the steps areindicated in the display, pressing the ( ) (right/enter) key displaysthe information for the selected steps. Harmonic level of voltage is too highAlarms and descriptionThe controller has an extended alarm system. When an alarm isactive, the sign ALARM in the display blinks and an error codeis shown on the screen. Possible error codes are shown in thetable below.AlarmDescriptionUALARMThe measured voltage is out of the set tolerance.1 LoALARM1 HiALARMMeasuring current is less than 15 mA (pleasecheck CT signal and verify that CT shorting pinhas been removed).Measuring current is too high.PFCALARMTarget cannot be reached.HArUALARMThe set THD voltage threshold has been exceeded.HArlALARMThe set THD current threshold has been ARMOne or more steps are defective. The defectivesteps are blinking together with the ALARM sign.One or more steps have less than 70% of originalsize. Number of step and alarm text are blinkingalternately.Over temperature alarm. Threshold level 2exceeded. The steps will be switched-offstep-by-step.The set operating hours of the controller havebeen exceeded.The maximum switching cycles threshold of atleast one stage has been exceeded.The set operating hours of at least one stagehave been exceeded.The Automatic initialization has been aborteddue to an error. The control is switched off. INFO OC INFO i INFO99.9% a10.12 k aAUTO apercentagenumber ofstepactual tooperationstypenominalpowerIt’s possible to have capacitive steps as well as inductive steps.Ensure the steps show capacitive (“C”) kvar).CC C INFO50 kvar aactualpowerof step High temperature alarm1. Replace dust filters (Catalog Number AUTOVAR6FX8).2. Verify proper operation of fans.3. Verify that measured ambient temperature does not exceed40 C (104 F).4. Check for external sources of heat such as direct sunlight.PFC alarmPossible reasons could be:1. Insufficient capacitance available or target PF set too high.2. Capacitor stages deteriorated.3. Capacitor stages sensed or set incorrectly (both in terms oftype (inductive or capacitive) and value (100 kvar insteadof 50 kvar).PF value incorrect, decreases as steps are added orshows X.XX“c”1. CT polarity is incorrect.2. CT leads are swapped.3. CT is not mounted on A phase.Adjust the Phase-Offset menu parameter according to thefollowing chart.CT installed phase (with respectto incoming AutoVAR bus)CT ON www.eaton.com11
Instruction Manual IM02607003EEffective July 2019PF value shows unity or does not change even after stepsare engaged1. Location of CT is incorrect. Ensure that the CT is connectedelectrically ahead of the capacitor bank (at the service entrancepanel or switchgear) and is not connected on the feeder thatsupplies power to the capacitor bank.2. Steps have failed.AutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual BLR-CX Plus controller technical data, continuedDescriptionSpecificationAmbient temperatureOperating: –20 to 70 CStoring: –40 to 85 CRange: 0 to 95 %Condensation: Not allowed300 VLN / 519 VLL CAT III519 V – 550 V CAT IIDegree of contamination 2IEC 61010-1, IEC 61000 6-2, IEC 61000 6-4: Level B,IEC 61326-1, UL 61010CE, c NRTL us (c UL us), EACType: Screw terminals, pluggableCross section: Max. 4 mm2Front: Plastic housing (UL94 V-0)Back: Metal coverFront: IP41 Back: IP20Approx. 0.6 kgDevice: H x B x T: 144 x 144 x 58 mmCut-out: H x B: 138 ( 0.5) x 138 ( 0.5) mmHumidityOvervoltage categoryIncorrect measurement valuesStandards1. Check that CT and PT ratios are programmed correctly inMenu 100.Compliance and listingConnections2. Check that Nominal voltage is programmed correctly inMenu 100.HousingController not switching on additional steps and does notreach target PFProtection classWeightDimensionsThis usually happens when the amount of capacitance available doesnot match the amount of kvar required. This can happen especiallyin low load situations when the amount of kvar required is verylow compared to the smallest available step size (for example,total kvar required is 12 kvar and the smallest step size availableis 60 kvar). The controller will not bring on any step to preventovercompensation.Retrofit installations with BLR-CX Plus controllerPlease retain and follow all instructions and safety precautionsduring and after installation.1. Check that the sensed and programmed capacitor step sizes areset and match the actual value.1. Compare voltage and current ratings of BLR-CX Plus with data ofmains and installation.2. Check that the setting in 314 is set to N.2. Mount the relay in the control panel with the two mounting clips.3. Check the amount of shortfall kvar ( Q) in the measurementmenu and program this value in menu 312.3. Connect protection GROUND to PE connection of metal case.4. If all above fails, one may need to install smaller kvar size stepsto allow the controller to switch them during low demand.5. Ensure that the short-link for CT input signal is removed.BLR-CX Plus controller technical dataDescriptionSpecificationMeasuring and supplyvoltageConnection: Single-phaseRange: 90–550 Vac, 45–65 HzProtection: Max. 6 APower consumption: 6 VATransformer factor: Adjustable 1.0 to 350.0Connection: Single-phaseRange: 5 mA–5 ATransformer factor: Adjustable 1 to 96006 or 12 Stage outputsType: Relay, normally-open, potential-freeSupply: Common, max. 10 ASwitch capacity per relay: 250 Vac / 5 A 400 Vac/1 A 48 Vdc / 1 A 110 Vdc / 0.2 AType: Transistor, normally-open, open collector outputSupply: Common, max. 1,2 ASwitching capacity per transistor: 100 mA/8–48 VdcNTC: Under the housing coverAccuracy: 5 CType: Relay, normally-open, potential-freeSwitching capacity: 5 A / 250 VacType: Relay, normally-closed, potential-freeSwitching capacity: 5 A / 250 VacLogic: Adjustable, high- or low-activeInput signal: 90–250 VacFor service purpose onlyUnassembled protocol: Modbus-RTUInterface: RS-485Common-mode range: –7 to 12 VDifferential-mode range: –12 to 12 VOutput current: –60 to 60 mACurrent measurementStage outputsOption -xxRTemperature measurementAlarm outputDefault Option -ncDigital inputService InterfaceModbusDefault Option -MB12EATON www.eaton.com4. BLR-CX Plus is to be connected according to the wiring diagram.6. Typical wiring diagram of the controller is shown below. Thismay not match the existing installation. Please consult Eaton forretrofitting this into existing Eaton capacitor banks.Figure 7. Connection diagram: CX plus—12T
Instruction Manual IM02607003EAutoVAR 300 automatically switched capacitor bank Installation, operation, and maintenance manual Effective July 2019OptionsTroubleshootingSymptomCorrectionNo control powerCheck primary control fuses (three fuses located infuse holder) and secondary fuse located on controltransformer.Check
Notee:Rated capacitor current (1000 x kvar) / ( 3 x voltage) (amps) Where: Voltage line-to-line voltage kvar Three-phase kvar rating of capacitor (nameplate rating) Example: 500 kvar capacitor, 480 V system: Rated capacitor current (500 x 1000) / ( 3 x 480) 601 A The breaker shall be rated to carry the 601 A x 135% or 811 A
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