Descriptive Bulletin 766-30 - S&C Electric Company

Enhanced Performance in LoopRestoration ApplicationsIntelliRupter enhances the performance of existingloop restoration schemes using conventionalreclosers. It eliminates the need to subject thealternate circuit in the loop to a fault when closing thetie. Just replace the recloser in the tie position withan IntelliRupter to take advantage of PulseClosingTechnology.Even greater benefits can be achieved in loopschemes where all protective points use IntelliRupter.Its fast interrupters and accurate sensing and controlenable significant reductions in protection margins.With the negligible effect pulseclosing has on sourcesidecustomers, the system can be segmented asneeded without sacrificing protection.And with IntelliRupters protecting the loop,customers won’t experience voltage sags on theirgood circuit during testing of a faulted circuit!Complaints and costly claims will be greatly reduced.Improved ReliabilityIntelliRupter improves reliability on both loopand radial circuits by overcoming the limits ofconventional coordination methods. Series-connectedIntelliRupters can be configured so that after onedevice opens to isolate a fault, those downstreamwith the same settings also open.When power returns, the IntelliRupters usepulsefinding to restore service. This techniqueautomatically recovers from situations wherean upstream device overreaches or otherwisemiscoordinates with a downstream device. Here’san example . . .The feeder in Figure 7 includes a recloser, A1,and an IntelliRupter, A2. Due to tight or impropercoordination, both devices trip in response to a faultdownstream of IntelliRupter.Figure 7. Pulsefinding with an upstream recloser.When the recloser closes, in the next step ofits operating sequence, it won’t see the fault. So itremains closed. IntelliRupter, upon sensing returnof voltage, pulsecloses. The pulses are too short toinitiate time-overcurrent timing of the recloser, so therecloser won’t trip.If the fault is no longer present during thepulseclosing sequence, IntelliRupter closes. Thesystem is fully restored.If, however, the fault persists, IntelliRupter locksout. But service is restored to customers servedfrom the feeder section between the recloser andIntelliRupter. Those customers only experience amomentary outage from tripping of the recloser.If A2 were a recloser instead of an IntelliRupter,the system wouldn’t be able to recover from themiscoordination between A1 and A2 because eachreclose operation puts full fault current on the system.Both devices would again time and trip. Ultimately,A1would lock out.With IntelliRupter, more series-connectedprotective devices can be applied, for bettersectionalization. Each pulsecloses, in turn, to verifythat its line segment is unfaulted . . . then closes torestore service. Only the IntelliRupter closest to thefault locks out. IntelliRupters never close into a fault.Cold-load inrush is mitigated because only one linesegment is energized with each closing. IntelliRuptersdon’t need to communicate with each other to takeadvantage of this enhanced coordination and inrushmitigation.For more information on the enhanced performanceand improved reliability provided by IntelliRupter, see“ADVANCING THE STATE OF LOOPED DISTRIBUTIONFEEDERS” on S&C’s website, at:http://www.sandc.com/edocs_pdfs/edoc_046279.pdfA New Concept in ControlsIntelliRupter is available with several kinds ofcontrol groups. Each offers easy configuration andoperation—and examination of waveforms andevents—using secure wireless communication to anearby laptop computer.The control group includes a protection andcontrol module and a communication module. SeeFigure 8. This flexible, low-maintenance arrangementoffers excellent immunity to surges and noise inducedby normal power line events such as faults andlightning strikes, and—in the case of IntelliRupter foroverhead system applications—minimizes pole clutter.IntelliRupter is powered from the distribution line,through the integral power module(s) or the externalpower supply, if furnished.The protection and control module provides pointon-waveclosing to minimize asymmetric fault currentand inrush current. It features a complete set ofprotection and control functions including:■■Simultaneous independent directional phaseground, negative-sequence, and sensitive-earthtime-overcurrent, instantaneous-overcurrent, anddefinite-time elements,8

IntelliRupter installation typically takes about twohours . . . or as little as one hour after your crews getexperienced.Compare the clean-looking IntelliRupter installationwith that of a conventional recloser. See Figure 10.The photos really tell the story.Figure 11. IntelliRupter has no external control or sensorcables.Figure 10. Typical conventional recloser installation.Control cables are vulnerable to damage from ice,rodents, and vandals. And sensor cables increaseexposure to damage from lightning and power surges,and complicate grounding.IntelliRupter eliminates these potential problems. Itdoesn’t have any external control or sensor cables!Compare the cable-less IntelliRupter in Figure 11with the many-cabled conventional recloser inFigure 12.Figure 12. Conventional recloser has myriad externalcontrol and sensor cables.11

If a PC isn’t available, IntelliRupter can be openedand closed and hot-line tags set using a hookstick,from the ground or a bucket truck, as shown inFigure 15.Should module replacement ever be necessary,it’s easily performed as well, as shown in Figure 16.There’s no need to reconfigure IntelliRupter . . . amemory module in the base remembers allthe settings.Figure 15. IntelliRupter can be opened and closed andhot-line tags set using a hookstick.Figure 16. Protection and control module andcommunication module are easy to change out,if replacement is ever necessary.13

Interrupter open/close/ready lever for manuallyopening and closing interrupters.Pull the OPEN lever down to open the interrupters. Openposition can be tagged if desired. Interrupters can betripped during an outage; control power isn’t required.Open interrupters are mechanically prevented fromclosing.Pull the CLOSE lever down once for the first closing profile.Pull the lever twice for the second closing profile. Controlpower must be available.Interrupter open/closed indicator on each phase islarge and reflective for easy viewing, day or night. It’sattached directly to the operating rod—no complicatedlinkage to break.Figure 21. Interrupter open/closed indicator, one ateach pole. Left: Red (closed) target. Right: Green (open)target. Reversed-color targets are optionally available.Figure 20. Interrupter open/close/ready lever. Top:Opening interrupters. Bottom: Closing interrupters.Figure 22. Disconnect open and close lever. Can only beoperated when interrupters are open.17

Blade coverTap coverFigure 25. Optional wildlife protection. Reduceswildlife-related nuisance outages.Figure 27. Optional bracket-mounted antenna.Extends four feet from the base; attaches at eitherend. Includes 900‐MHz, 3‐dBd-gain omni-directionalantenna or 900‐MHz, 9‐dBd gain directional Yagiantenna, plus cable and hardware. Also available:bracket only.Other Options:■■■■International Crating. Features hardwoodor certified heat-treated wood products.Ten-year warranty in lieu of standard two-yearwarranty. Matches standard ten-year warrantyof control groups.Figure 26. Optional MacLean Power SystemsZforce Type ZHP (Heavy Duty) polymerhousedmetal-oxide surge arresters. Factoryinstalledand wired.19

Construction of IntelliRupters for Underground System ApplicationsBACDEFigure 28. Disconnect Pad-Mounted Style IntelliRupter, rated 15.5 kV maximum.A Protection and Control Module and Communication Module located in low-voltage compartmentB Ground trip block and hot-line tag located in low-voltage compartmentC Interrupter open/close/ready lever. See Figures 29 and 30D Interlock lever bar provides means to lock interrupters in open positionE Visible load-break disconnect60-Hertz RatingskVAmperes, RMSMinimum Maximum BIL Continuous Interrupting, Symmetrical11.43 15.5 95 630 16 00018.81 27 125 630 12 50020

Interrupter open/close/ready lever for manually opening and closinginterrupters.To Open the interrupters, slide the interlock bar to the right and pull theinterrupter open/close/ready lever forward.Open position can be tagged, if desired, by sliding interlock bar to theleft with the interrupter open/close/ready lever in the Open position.Interrupters can be tripped during an outage; control power isn’t required.Open interrupters are mechanically prevented from closing.Figure 29. Interrupter open/close/ready lever in Open position.To Close the interrupters, slide the interlock bar to the left with interrupter open/close/ready lever in the Ready position. Then push the interrupter open/close/ready leverforward once for the first closing profile.Push the interrupter open/close/ready lever forward twice for the second closing profile.Control power must be available.Figure 30. Left: Interrupter open/close/ready lever in Ready position. Right: Interrupter open/close/ready lever in Close position.21

AccessoriesFigure 31. Module handle fitting. Attaches to hookstickwith universal fitting. Permits field installation and removalof protection and control module and communicationmodule. Includes prong tor operating lntelliRupter levers.Figure 34. Module stub handle. Permits installationand removal of protection and control module andcommunication module—in your service center or Iab.When permitted by utility operating practice, can be usedby a gloved individual to install and remove modules inthe field.External power supply connectorFigure 32. WiFi tester. Simulates connection tocommunication module. Confirms your laptop computercan establish secure WiFi connection to lntelliRupter. Alsodemonstrates use of WiFi security keys. For indoor use only.Figure 35. Power supply. Powers protection and controlmodule and communication module, installed in thebase or low-voltage compartment—in your service centeror lab. Permits open, close, and pulseclose test operations,pre-installation uploading and downloading of configurationsettings, programming of radio, and chargingof radio batteries, as applicable. For indoor use only.Figure 33. Docking station. Powers protection and controlmodule and communication module, removed fromthe base or low-voltage compartment—in your servicecenter or lab. Permits pre-installation uploading anddownloading of configuration settings, programmingof radio, and charging of radio batteries, as applicable.For indoor use only.22Other Accessories:■■■■■■■■SEL AutoRANGER Model AR8-OH FaultedCircuit Indicators, set of three.Spare 12-Vdc, 8-Ampere-Hour Battery Pack forcommunication module.Battery Charger Output Harness. Forconnecting battery pack to an 800-mA,current-limited 12-Vdc lead-acid batterycharger.Detailed Instruction Manual. Includes printedcopies of all IntelliRupter instruction sheets,erection drawings, and reference drawings.

Why Choose IntelliRupters Insteadof Conventional Reclosers?Consider all the important features included asstandard on IntelliRupter PulseClosers . . . that areeither unavailable or only available at substantialadditional cost on conventional reclosers.IntelliRupter is clearly the intelligent choice.Standard FeaturePulseClosing TechnologyIntelliRupter PulseCloserBenefits• Increases equipment life• Eliminates voltage sags• Reduces conductor slap• Improves coordination• Reduces arc flash energy• Allows testing of undergroundcircuitsConventionalReclosersNot availablePulsefinding Capability • Simplifies coordination • Improves segmentation Not possibleIntelligent Fuse SavingCapability■• Reduces number ofdisturbances on a feeder• Improves SAIDI withoutnegatively impacting MAIFINot possibleIntelliTeam® SG Capability• Improves reliability incritical areas of distributionsystem• Quickly initiates servicerestoration after a faultRequires S&CIntelliNode InterfaceModuleLoop Restoration Capability• Improves reliability of loopedcircuits• Eliminates voltage sagsPossible, but withoutpulseclosingAutomatic Source-TransferCapability• Improves reliability of facilitieswith critical loadsMay require optionalhardwareVariety of Single-Phase andThree-Phase Tripping andLockout Capabilities• Easy tailored to therequirements of eachapplication• Can reduce number ofdisturbances on a feeder,improving MAIFIOptional, if possibleWiFi Communication andConfiguration• Permits configuration andoperation from the securityof your vehicle• Extensive security featuresprevent unauthorized accessOptionalHigh-Resolution WaveformCapture and ViewingSoftware with GPS TimeStamping• Speed post-event analysisTypically lower resolution.GPS time stamping isoptionalHigh-Accuracy IntegratedCurrent Sensing andVoltage Sensing on BothSides of DeviceSelf-Powered• ±0.5% current sensingaccuracy, for load currentsthrough fault currents• ±0.5% voltage sensingaccuracy• Eliminates cost of potentialtransformer and fusing• Simplifies grounding• Eliminates cost of sensormountings and cables• Simplifies grounding• Reduces installation timeand cost• Reduces installation timeand costLimited-range integratedcurrent sensing may beoptionally available.High-accuracy integratedvoltage sensing may beoptionally availableOptionalBase-Mounted Controls• Eliminates cost of controlenclosure and cables• Simplifies grounding• Reduces installation timeand costNot availableIntegrated DisconnectModels• Cuts installation time• Interlocked operation• Position is reported to SCADANot availableQuick InstallationTen-Year Control Warranty• Single-point lifting eliminatesneed for framing• Includes mountingbracket• Heightens confidencein quality of the control• No enclosure to mount• Simplifies antenna connection• Factory installed and wiredsurge arrestors are optional• Ten-year hardware warrantyis optionalInstallation typically takestwice as long. Mountingbracket is optional.Surge arrestors may notbe availableTen-year warranty oncertain controls only.Ten-year warranty onhardware is not available■ For more information on Intelligent Fuse Saving, see “A New Fuse-Saving Philosophy” onS&C’s website, at: http://www.sandc.com/edocs_pdfs/edoc_048976.pdf23

Let S&C’s Power Systems Solutions’ ProfessionalsHelp You Maximize the Benefits of IntelliRupter and IntelliTeam SGIntelliRupter and IntelliTeam SG will completelychange the way you think about designing distributionsystems for reliability and optimum functionality.S&C’s Power Systems Solutions’ team of automation,system planning, and engineering experts haveextensive experience helping electric utilities applyS&C’s automation tools. They can get you up to speedquickly—avoiding the time-consuming learning curvethat might otherwise be required.Using their experience with S&C’s IntelliRupter andIntelliTeam SG, the Power Systems Solutions team hasdeveloped approaches for fully integrating distributionautomation into even the most complex circuitconfigurations, ensuring your system works right . . .the first time.They’ll help you apply IntelliRupter and IntelliTeamSG to:■■■■■■■■Improve reliabilityDefer capital expendituresReduce costs, andManage aging assets.Key considerations in the evaluation processinclude:■■■■■■■■■■Analysis of costs versus benefitsReview of load levels and transfer capacityDetermination of critical customer needsDetermination of geographic concerns, andDetermination of reliability impacts.S&C can also provide critical engineering and fieldservice expertise to ensure successful implementationof your distribution automation solution, including:Engineering ServicesCoordination studies to evaluate protection settings■■■■■■■■End-to-end communication system design to makesure your system works right, today and in thefuture, andIntelliTeam SG Factory Acceptance Testing.Simulates your system to ensure automation designperforms as expected.IntelliTeam SG Site Automation Testing. Simulatesevents on site to ensure automation settingsand demonstrate communication infrastructurefunctionality.24

Field ServicesCommunication surveys■■■■■■■■SCADA integrationCommissioning, andTraining.Engineering, Procurement, Construction (EPC)ServicesProject management andConstruction management.■■■■And S&C can provide services to evaluate theperformance of your IntelliRupters and IntelliTeam SGsystem after commissioning, including:■■■■■■■■■■System inspection and data collectionRemote monitoring for “system health reports”System event evaluationSystem communication evaluation, andPost-installation benefit analysis.No other supplier offers the latest in distributionautomation technology—plus assistance in applyingand implementing this technology—so you’ll realizethe maximum return on your investment.Contact your local S&C Sales Office today formore information.25

Printed in U.S.A.Descriptive Bulletin 766-30December 2, 2013©Offices Worldwide ■ www.sandc.com