217 Transmission Line Protection g Digital Energy • Proven current differential protection ensures secure high-speed tripping • Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P&C life cycle costs • Increased sensitivity through dynamic charging current compensation and communication channel asymmetry compensation • Adaptive restraint characteristic provides excellent security against measurement errors including CT saturation. • Advanced fault and disturbance recording, including internal relay operating signals thus eliminating the need for external recording devices • Phasor Measurement Unit - Synchronized phasor information according to IEEE C37.118 standard • In-zone power transformer functionality enables savings on CTs and protection devices requirements • Overhead lines and underground cables of different voltage levels • Circuits with tapped transformer feeders • Suitable for three terminal line configurations, with channel redundancy and direct transfer tripping (DTT) • Wide area system monitoring and control and using integrated protection and synchrophasor measurement • Applications requiring three-pole autoreclosing and independent synchrocheck supervision • Real time monitoring of remote, local and differential per phase currents • Oscillography - 64 samples/cycle, up to 64 records • Event Recorder - 1024 time tagged events, with 0.5ms scan of digital inputs • Data Logger - Up to 16 channels with user selectable sampling rate • Synchronised measurement of voltage & current and sequence component phasors - 1 to 60 phasors/sec Monitoring and Metering Protection and Control • Line current differential with adaptive restraint and In-zone transformer • Stub bus protection • Breaker failure • Three pole Autoreclose • Underfrequency protection • Phase, ground, neutral and negative sequence time and instantaneous overcurrent • Thermal overload, phase and neutral directional overcurrent and broken conductor • Phase over/under voltage, negative sequence overvoltage • Two independent Synchronism check elements Communications • Networking interfaces – 100Mbit Fiber Optic Ethernet, RS485, RS232, RS422, G.703, C37.94 • Multiple Protocols - IEC 61850, DNP 3.0 Level 2, Modbus RTU, Modbus TCP/IP, IEC60870-5-104 • Direct I/O – secure, high-speed exchange of data between L30s for Direct Transfer Trip applications • Embedded Managed Ethernet Switch with 4 - 100 Mbit Fiber optic ports and 2 copper ports FEATURES APPLICATIONS KEY BENEFITS EnerVista™ Software • Graphical Logic Designer and Logic Monitor to simplify designing and testing procedures • Document and software archiving toolset to ensure reference material and device utilities are up-to-date • Robust communications with up to 8 HardFiber Bricks • Seamless integration with existing L30 functions • Redundant architecture for dependability and security IEC 61850 Process Bus Interface L30 Multilin™ LINE CURRENT DIFFERENTIAL SYSTEM Cost effective Current Differential System for high-speed Lines and Cables
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LINE CURRENT DIFFERENTIAL SYSTEM - BELMET · • Line current differential with adaptive restraint and In-zone ... used in the traditional percent differential ... calculations and
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Protection and ControlThe L30 is a cost effective line currentdifferential protection relay intended forsub-transmission and medium voltagelines and cables providing reliable andsecure operation even under the worstcase power system conditions. The L30providessecurehigh-speedfaultdetectionand clearance suitable for three-poletrippingapplications.PartoftheUniversalRelayfamily,theL30comeswithavarietyof versatile features truly integratingprotection, monitoring, metering,communicationandcontrol inoneeasy-to-usedevice.TheUniversalRelayfamilyoffersahighdegreeofmodularity in itsdesignandfunctionalityprovidingsuperiorperformance in protection and controlmeetingthetoughestrequirementsofthemarketplace.
Current Differential ProtectionTheL30currentdifferentialprotectionrelayusessuperiorandpatentedalgorithmstoaddress the challenges of bandwidth ,security,dependabilityand sensitivity incurrentdifferentialrelaying.Bandwidth requirements are effectivelyaddressedbymeansofapatentednewdata consolidation technique called“phaselets”.Thispermitsapplicationwithinacommunicationsbandwidthof64Kbps,andcandetect faultswithinahalfcyclepluschanneldelay.The L30 innovative dual slope adaptiverestraintcharacteristic,basedonestimates
ofmeasurementerrors,allowtherelaytobesecureonsevereexternalfaultswhilemaintainingsensitivityforinternalfaults.Theestimateoferrorsintheinputcurrentspermitsmoresensitivesettingsthanthoseusedinthetraditionalpercentdifferentialschemes. The Line Differential elementalso has 2nd harmonic inrush-currentinhibit for In-zone power transformerprotection.ThisfunctionalityenablestheL30 toprotect2or3-terminal lines thathave a power transformer in betweenends.
TheL30approachtoclocksynchronizationrel ies upon precise distr ibutedsynchronization. Clocks are phasesynchronized to each other andfrequency synchronized to the powersystem frequency.Each relaycomparesitsclocktothephaseoftheotherclocksandmakesappropriateadjustments.Thisallows forgreater transient ride-throughfor power system and communicationsdisturbances.
Enhancedadditionalsecurity isprovidedby a sensitive current disturbancedetector,whichcanbeusedtosupervisethecurrentdifferentialelement.
The L30 is the single point for protection, control, metering, and monitoring in one integrated device that can easily be connected directly into DCS or SCADA monitoring and control systems like Viewpoint Monitoring as shown.
L30 Line Differential System
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Monitoring CLOSE TRIP
Data From/To Remote End(via Dedicated Communications) MeteringFlexElement
TM TransducerInputs
50DD 87L50BF51_251P50_2
79
50P
27P
27X59N
59X
59P
25
51G50G
50N 51N 49 67N
67P
Functional Block Diagram
L30 - Protection, Metering, Monitoring and Control
For long lines and especially forundergroundcables,thechargingcurrentmaybelargeandresultinexcessivelyhighpickupsettings.TheL30candynamicallycompensate the charging current thusincreasingitssensitivitytothefaultcurrentonlongtransmissionlines.
Enhanced Monitoring Features
TheL30usesadvancederrordetectionandsupervising functions to secure the L30against maloperation due to erroneousdata.Highbiterrorratesareaddressedbymeans of computing a 32 bit CRC checksum,effectivelyaddressing theconcernsofmultiplebiterrorsduetohighchannelnoise.On multiplexed channels, channelasymmetrymaybeexpectedduetopathswitching spurious differential currents,which can endanger the security of thedifferential system. By using GPS timesynchronization, up to 10ms of channelasymmetrycanbecompensatedfor.ExtrasecurityhasbeenimplementedintheL30toensureproperoperationontheeventofIRIG-Bsignalfailure.Integrated channel monitoring providesreal-time diagnostic data on the healthof the L30. Communications channeldeterioration or failure will activate analarm,andcanbeusedtoenablebackupprotection. Channel propagation delayis monitored and adjusted according tovariationsincommunicationpaths.
Communication Topologies
Relays can communicate through directfiber,RS422,G.703,IEEEC37.94interfacesat64Kbps,withextensivechannelmonitoringanddiagnosticsareincluded.Inacurrentdifferential scheme, the L30s exchangedata via the communication link, actingeither asmaster collecting data,makingcalculations andmaking all relevant tripand restraint decisions, or as slave onlytransmittingcurrentdatatotheoneactingasmaster. For two terminal applications,use the redundant communicationscapabilityoftheL30foroptimalreliabilityof the current differential line protection.For this scheme, data is continuouslytransmitted over both channels, so if afailure occurs, the L30 will continue to
sentoverpilotcommunicationschannelsselectable through user configurablelogic.
Autoreclosing
The L30 provides multi-shot autoreclosingforthreepoleapplicationswithindependentlysettabledeadtimeforeachshot . Auto-reclose can be dynamicallyblockedbyuserprogrammablelogic.Fourdifferentauto-relcosemodesareavailableenablingtheuserstoselectthereclosingmodetosuitspecificapplications.
Synchronism Check
The L30 monitors voltage difference,phaseangledifferenceandslipfrequencyto ensureproper breaker closureasperuser requirements. The L30 providesadditionalenhancementsinsynchronizingby checking dead source conditionsfor synchronism bypass under theseconditions.
Breaker Failure
The L30 provides two fully independentbreakerfailureprotectionelements.
IEC 61850 Process BusThe IEC 61850 Process Bus module isdesignedtointerfacewiththeGEMultilinHardFiberSystem,allowingbi-directionalIEC 61850 fiber optic communications.The HardFiber System is designed tointegrate seamlessly with the existing
Typical two and application of L30. L30 supports a variety of media cards for signalling between L30’s including direct multimode or single mode fibre, RS422, G.703 and IEEE C37.94.
Typical Applications
providecurrentdifferentialprotection.Forthreeterminalapplications,advancedinter-relay communication featureseliminate the need for redundantcommunicationchannelsduetotheabilityoftheL30toautomaticallyswitchbetweenmaster and slave mode, maintaining adependablesystemevenwithafailureofoneofthecommunicationchannels.
Overvoltage and undervoltage protection
Longlinesunderlightlyloadedconditionsor no-load may experience voltagesexceeding rated per unit voltage levelof the line. Use the phase overvoltageelementoftheL30toinitiatealocaltripaswellasaremotetripusingdirecttransfertrip.
Overcurrent Functions
TheL30provides thermaloverload, timeand instantaneousovercurrentelementsfor phase, neutral, ground, negativesequence,phaseandneutraldirectional.Any of them can run in parallel withprimarydifferentialprotectionorcanbeprogrammedtorunwhenthedifferentialelementisnotavailable.
Direct transfer trip (DTT)
UsethedirecttransfertripfeatureofL30to trip remote breaker. Both single poleand three pole direct transfer trips aresupported. Up to eight signals can be
Advanced AutomationTheL30incorporatesadvancedautomationfeatures including powerful FlexLogic™programmablelogic,communication,andSCADAcapabilitiesthatfarsurpasswhatisfoundintheaveragelinerelay.TheL30integratesseamlesslywithotherURrelaysforcompletesystemprotection.
FlexLogic™
FlexLogic™ is the powerful UR-platformprogramming logic engine thatprovidesthe ability of creating customizedprotectionandcontrol schemes therebyminimizing theneed,andtheassociatedcosts,ofauxiliarycomponentsandwiring.Using FlexLogic™, the L30 can beprogrammedtoproviderequiredtrippinglogicalongwithcustomschemelogicforlinebreakercontroland interlockinganddynamicsettinggroupchanges.
Monitoring and MeteringTheL30includeshighaccuracymeteringand recording forallACsignals.Voltage,current,andpowermeteringarebuiltintothe relay as a standard feature. CurrentandvoltageparametersareavailableastotalRMSmagnitude,andasfundamentalfrequencymagnitudeandangle.
Fault and Disturbance Recording
The advanced disturbance and eventrecording features within the L30 cansignificantly reduce the timeneeded forpostmortem analysis of power systemeventsandcreationofregulatoryreports.Recordingfunctionsinclude:
The very high sampling rate and largeamount of storage space available fordata recording in the L30 can eliminatetheneed for installingcostlystandalonerecordingequipment.
Advanced Device Health Diagnostics
TheL30performscomprehensivedevicehealth diagnostic tests during startupand continuously at runtime to testits own major functions and criticalhardware.Thesediagnostictestsmonitorforconditionsthatcould impactsecurityandavailabilityofprotection,andpresentdevicestatusviaSCADAcommunicationsand front panel display. Providingcontinuousmonitoringandearlydetectionof possible issueshelps improve systemuptime.
FlexLogicTM Designer
Flexlogic™ allows for customizing the L30 to operate and control the breakers and other auxiliary devices needed to fit most line protection schemes and applications.
CommunicationsTheL30providesforsecureremotedataand engineering access,making it easyand flexible to use and integrate intonew and existing infrastructures. Fiberoptic Ethernet provides high-bandwidthcommunicationsallowingforlow-latencycontrolsandhigh-speed file transfersofrelayfaultandeventrecord information.Theavailable redundantEthernetoptionand the embedded managed Ethernetswitchprovidethemeansofcreatingfaulttolerant communicationarchitectures inaneasy,cost-effectivemanner.TheL30supportsthemostpopularindustrystandardprotocolsenablingeasy,directintegration into monitoring and SCADAsystems.
• IEC61850
• DNP3.0
• IEC60870-5-104
• ModbusRTU,ModbusTCP/IP
Interoperability with Embedded IEC 61850
TheL30with integrated IEC61850canbeused to lower costs associated with lineprotection, control and automation. GEMultilin’s leadership in IEC 61850 comesfrom thousands of installed devices andfollowsonMultilin’sextensivedevelopmentexperiencewithUCA2.0.
TheL30supportsEnglish,French,Russian,andChineselanguagesonthefrontpanel,EnerVista™ setup software, andproductmanual. Easily switch between Englishandanadditional languageon the localdisplayswithoutuploadingnewfirmware.
EnerVistaTM SoftwareTheEnerVista™Suiteisanindustry-leadingset of software programs that simplifieseveryaspectofusing the L30 relay. TheEnerVista™ suite provides all the toolsto monitor the status of the protectedasset , maintain the relay, and integrateinformation measured by the L30 intoDCS or SCADA monitoring systems.ConvenientCOMTRADEandSequenceof
Record the operation of the internal L30 elements and external connected devices with 1ms time-stamped accuracy to identify the Sequence of Operation of station devices during line faults and disturbances.
Power System TroubleshootingTheL30containsmanytoolsandreportsthatsimplifyandreducetheamountoftimerequiredfortroubleshootingpowersystemevents.
Analyze line faults using both analog and digital power system quantities that are measured and recorded up to a rate of 64 samples per cycle.
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EventsviewersareanintegralpartoftheUR Setup software included with everyURrelay,tocarryoutpostmortemeventanalysis to ensure proper protectionsystemoperation.
EnerVista™ Launchpad
EnerVista™ Launchpad is a powerfulsoftware package that provides userswith all of the setup and support toolsneeded for configuringandmaintainingGEMultilinproducts.Thesetupsoftwarewithin Launchpad allows configuringdevices in real-time by communicatingusing serial, Ethernet , or modemconnections,orofflinebycreatingsettingfilestobesenttodevicesatalatertime.Included in Launchpad is a documentarchiving and management systemthat ensures critical documentation isup-to-date and availablewhen needed.Documentsmadeavailableinclude:
• Manuals
• ApplicationNotes
• GuideformSpecifications
• Brochures
• WiringDiagrams
• FAQ’s
• ServiceBulletins
Viewpoint Monitoring
Viewpoint Monitoring is a simple-to-useand full-featured monitoring and datarecording software package for smallsystems.ViewpointMonitoringprovidesacompleteHMIpackagewiththefollowingfunctionality:
ViewpointMaintenanceprovidestoolsthatwillcreatereportsontheoperatingstatusoftherelay,simplifythestepstodownloadfaultandeventdata,andreducetheworkrequired for cyber-security complianceaudits. Tools available in ViewpointMaintenanceinclude:
• SettingsSecurityAuditReport
• DeviceHealthReport
• SingleClickFaultDataRetrieval
EnerVista™ Integrator
EnerVista™ Integrator is a toolkit thatallowsseamlessintegrationofGEMultilindevices into new or existing automationsystems.IncludedinEnerVista™Integratoris:
• OPC/DDEServer
• GEMultilinDrivers
• AutomaticEventRetrieval
• AutomaticWaveformRetrieval
User InterfaceTheL30 frontpanelprovidesextensive localHMIcapabilities. The localdisplay isused formonitoring, statusmessaging,faultdiagnosis,anddeviceconfiguration.Userconfigurablemessagesthatcombinetextwithlivedata,canbedisplayedwhenuser-definedconditionsaremet.
LEDIndicators
Multi-LanguageDisplay• English• Russian• French• Chinese
UserProgrammablePushbuttons
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Typical Wiring
L30
A B C
52
1
Powersupply
9
CPU
7
COM
8
CT/VT
6Inputs/outputs
*
6Inputs/outputs
*
6Inputs/outputs
*
6
Inputs/outputs
6Inputs/outputs
*
JU MX LW KV BHT DN GS FPR
RS-232
DB-9
(front)
UR COMPUTER
1
TXD RXD
RXD TXD
SGND SGND
1 832
207645
22
CONNECTOR
PERSONALCOMPUTER
CONNECTOR
2 23 34 45 56 67 78 89 9
DC
TOREMOTE
L30
OPTIONAL
TC
TC
N
2
1H1a
H2b
H1cH1b
H2c
H2a
H4a
H4c
H3bH3a
H4b
H3c
SURGE
H6a
H8a
H5b
H7b
H8b
H5a
H7a
H6c
H8c
H5c
H7c
H1
H2
H3
H4
I
V
I
V
I
V
I
V
6G
U8a
U7b
U7a
U8c
U7c U1b
U2b
U3b
U4b
U5b
U6b
U1a
U2a
U3a
U4a
U5a
U6a
U1c
U2c
U3c
U4c
U5c
U6c
SURGEU8b
U1
U5
U2
U6
U3
U4
6H I
V
I
V
I
V
I
V
I
V
I
V
N7a
N1a
N2b
N7c
N1c
N7b
N1b
N8cN8b
N2c
N8a
N2a
N4a
N5b
N4c
N6b
N3bN3a
N6a
N4b
N5c
N5a
N3c
N6c
6K N1
N5
N2
N6
N3
N7
N4
N8
CRITICALFAILURE
OUTPUT
CONTROLPOWER
HILO
1
FILTERSURGE
B3a
B1b
B8a
B6b
B8b
B6a
B3b
B1aB2b
B5b
Tx1 Rx1
Tx2 Rx2
INTE
R-RE
LAY
CO
MM
S.W
7A
FIBER
FIBER
6C
S1
S5
S2
S6
S3
S7
S4
S8
S7a
S1a
S2b
S7c
S1c
S7b
S1b
S8cS8b
S2c
S8a
S2a
S4a
S5b
S4c
S6b
S3bS3a
S6a
S4b
S5c
S5a
S3c
S6c
L6a
L8a
L5b
L7b
L5a
L7a
L6c
L8c
L5c
L7c
SURGE
L1a
L8b
L4c
L2c
L3aL3c
L1c
L3b
L1b
L4a
L2a
6D
minimum
PROVIDED
8L
F1c
F4a
F3c
F2c
F4c
F1a
F4b
F1b
F2a
F3a
F2b
F3b
IA IB IC IGIA5
IA1
IB5
IC5
IG5
IB1
IC1
IG1
F8c
F8a
F5a
F5c
F7c
F6a
F7a
F6c
VX
VA VB
VC VX
VA VB
VC
Multilin
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10BaseFL
10BaseFL
10BaseT
D1aD2a
D4bD3a
D4a IRIG-BInput
IRIG-BOutput
COM1
RS485
ALTERNATE
NORMAL
Tx2Rx2
Tx1Rx1
BNC
BNC
FibreOptic
*
RemoteDevice
Shielded
Co-axial
Co-axial
com
10BaseFL
10BaseFL
10BaseT
D1aD2a
D4bD3a
D4a IRIG-BInput
IRIG-BOutput
COM1
RS485
ALTERNATE
NORMAL
Tx2Rx2
Tx1Rx1
BNC
BNC
FibreOptic
*
RemoteDevice
Shielded
Co-axial
Co-axial
L30-H00-HCL-F8L-H6G-L6D-N6K-S6C-U6H-W7A
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L30 - * 00 -H * * -F ** -H ** -L ** -N ** -S ** -U ** -W/X ** For Full Sized Horizontal MountBaseUnit L30 BaseUnitCPU E RS485+RS485(IEC61850optionnotavailable)
G RS485+Multi-modeST10BaseFH RS485+Mutli-modeSTRedundant10BaseFJ RS485+Multi-modeST100BaseFXK RS485+Multi-modeSTRedundant100BaseFXN RS485+10/100BaseTS RS485and6-portmanagedEthernetSwitch