Template - Standard (Results Based) - NERC
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceA. Introduction1. Title:Protection System, Automatic Reclosing, and Sudden Pressure RelayingMaintenance2. Number: PRC-005-63. Purpose: To document and implement programs for the maintenance of allProtection Systems, Automatic Reclosing, and Sudden Pressure Relayingaffecting the reliability of the Bulk Electric System (BES) so that they are keptin working order.4. Applicability:4.1. Functional Entities:4.1.1 Transmission Owner4.1.2 Generator Owner4.1.3 Distribution Provider4.2. Facilities:4.2.1 Protection Systems and Sudden Pressure Relaying that are installed forthe purpose of detecting Faults on BES Elements (lines, buses,transformers, etc.)4.2.2 Protection Systems used for underfrequency load-shedding systemsinstalled per ERO underfrequency load-shedding requirements.4.2.3 Protection Systems used for undervoltage load-shedding systemsinstalled to prevent system voltage collapse or voltage instability for BESreliability.4.2.4 Protection Systems installed as a Remedial Action Scheme (RAS) for BESreliability.4.2.5 Protection Systems and Sudden Pressure Relaying for generator Facilitiesthat are part of the BES, except for generators identified throughInclusion I4 of the BES definition, including:4.2.5.1 Protection Systems that act to trip the generator either directlyor via lockout or auxiliary tripping relays.4.2.5.2 Protection Systems and Sudden Pressure Relaying forgenerator step-up transformers for generators that are part ofthe BES.4.2.5.3 Protection Systems and Sudden Pressure Relaying for stationservice or excitation transformers connected to the generatorbus of generators which are part of the BES, that act to trip thegenerator either directly or via lockout or tripping auxiliaryrelays.Page 1 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying Maintenance4.2.6 Protection Systems and Sudden Pressure Relaying for the following BESgenerator Facilities for dispersed power producing resources identifiedthrough Inclusion I4 of the BES definition:4.2.6.1 Protection Systems and Sudden Pressure Relaying for Facilitiesused in aggregating dispersed BES generation from the pointwhere those resources aggregate to greater than 75 MVA to acommon point of connection at 100kV or above.4.2.7 Automatic Reclosing 1, including:4.2.7.1 Automatic Reclosing applied on the terminals of Elementsconnected to the BES bus located at generating plantsubstations where the total installed gross generating plantcapacity is greater than the gross capacity of the largest BESgenerating unit within the Balancing Authority Area or, if amember of a Reserve Sharing Group, the largest generatingunit within the Reserve Sharing Group. 24.2.7.2 Automatic Reclosing applied on the terminals of all BESElements at substations one bus away from generating plantsspecified in Section 4.2.7.1 when the substation is less than 10circuit-miles from the generating plant substation.4.2.7.3 Automatic Reclosing applied as an integral part of an RASspecified in Section 4.2.4.5. Effective Date: See the Implementation Plan for this standard.6. Definitions Used in this Standard:Automatic Reclosing – Includes the following Components: Reclosing relay Supervisory relay(s) or function(s) – relay(s) or function(s) that perform voltageand/or sync check functions that enable or disable operation of the reclosingrelay Voltage sensing devices associated with the supervisory relay(s) or function(s)Automatic Reclosing addressed in Section 4.2.7.1 and 4.2.7.2 may be excluded if the equipment owner can demonstrate that aclose-in three-phase fault present for twice the normal clearing time (capturing a minimum trip-close-trip time delay) does notresult in a total loss of gross generation in the Interconnection exceeding the gross capacity of the largest relevant BESgenerating unit where the Automatic Reclosing is applied.2 The largest BES generating unit within the Balancing Authority Area or the largest generating unit within the Reserve SharingGroup, as applicable, is subject to change. As a result of such a change, the Automatic Reclosing Components subject to the1standard could change effective on the date of such change.Page 2 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying Maintenance Control circuitry associated with the reclosing relay or supervisory relay(s) orfunction(s)Sudden Pressure Relaying – A system that trips an interrupting device(s) to isolate theequipment it is monitoring and includes the following Components: Fault pressure relay – a mechanical relay or device that detects rapid changes ingas pressure, oil pressure, or oil flow that are indicative of Faults within liquidfilled, wire-wound equipment Control circuitry associated with a fault pressure relayUnresolved Maintenance Issue – A deficiency identified during a maintenance activitythat causes the Component to not meet the intended performance, cannot be correctedduring the maintenance interval, and requires follow-up corrective action.Segment – Components of a consistent design standard, or a particular model or typefrom a single manufacturer that typically share other common elements. Consistentperformance is expected across the entire population of a Segment. A Segment mustcontain at least sixty (60) individual Components.Component Type – Any one of the five specific elements of a Protection System Any one of the four specific elements of Automatic Reclosing Any one of the two specific elements of Sudden Pressure RelayingComponent – Any individual discrete piece of equipment included in a ProtectionSystem, Automatic Reclosing, or Sudden Pressure Relaying.Countable Event – A failure of a Component requiring repair or replacement, anycondition discovered during the maintenance activities in Tables 1-1 through 1-5, Table3, Tables 4-1 through 4-3, and Table 5, which requires corrective action or a ProtectionSystem Misoperation attributed to hardware failure or calibration failure.Misoperations due to product design errors, software errors, relay settings differentfrom specified settings, Protection System Component, Automatic Reclosing, or SuddenPressure Relaying configuration or application errors are not included in CountableEvents.B. Requirements and MeasuresR1.Each Transmission Owner, Generator Owner, and Distribution Provider shall establisha Protection System Maintenance Program (PSMP) for its Protection Systems,Automatic Reclosing, and Sudden Pressure Relaying identified in Section 4.2, Facilities.[Violation Risk Factor: Medium] [Time Horizon: Operations Planning]Page 3 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceThe PSMP shall:1.1. Identify which maintenance method (time-based, performance-based per PRC005 Attachment A, or a combination) is used to address each Protection System,Automatic Reclosing, and Sudden Pressure Relaying Component Type. Allbatteries associated with the station dc supply Component Type of a ProtectionSystem shall be included in a time-based program as described in Table 1-4 andTable 3.1.2. Include the applicable monitored Component attributes applied to eachProtection System, Automatic Reclosing, and Sudden Pressure RelayingComponent Type consistent with the maintenance intervals specified in Tables 11 through 1-5, Table 2, Table 3, Table 4-1 through 4-3, and Table 5 wheremonitoring is used to extend the maintenance intervals beyond those specifiedfor unmonitored Protection System, Automatic Reclosing, and Sudden PressureRelaying Components.M1. Each Transmission Owner, Generator Owner and Distribution Provider shall have adocumented PSMP in accordance with Requirement R1.For each Protection System, Automatic Reclosing, and Sudden Pressure RelayingComponent Type, the documentation shall include the type of maintenance methodapplied (time-based, performance-based, or a combination of these maintenancemethods), and shall include all batteries associated with the station dc supplyComponent Types in a time-based program as described in Table 1-4 and Table 3.(Part 1.1)For Component Types that use monitoring to extend the maintenance intervals, theresponsible entity(s) shall have evidence for each Protection System, AutomaticReclosing, and Sudden Pressure Relaying Component Type (such as manufacturer’sspecifications or engineering drawings) of the appropriate monitored Componentattributes as specified in Tables 1-1 through 1-5, Table 2, Table 3, Table 4-1 through 43, and Table 5. (Part 1.2)R2.Each Transmission Owner, Generator Owner, and Distribution Provider that usesperformance-based maintenance intervals in its PSMP shall follow the procedureestablished in PRC-005 Attachment A to establish and maintain its performance-basedintervals. [Violation Risk Factor: Medium] [Time Horizon: Operations Planning]M2. Each Transmission Owner, Generator Owner, and Distribution Provider that usesperformance-based maintenance intervals shall have evidence that its currentperformance-based maintenance program(s) is in accordance with Requirement R2,which may include, but is not limited to, Component lists, dated maintenance records,and dated analysis records and results.R3.Each Transmission Owner, Generator Owner, and Distribution Provider that utilizestime-based maintenance program(s) shall maintain its Protection System, AutomaticReclosing, and Sudden Pressure Relaying Components that are included within thePage 4 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying Maintenancetime-based maintenance program in accordance with the minimum maintenanceactivities and maximum maintenance intervals prescribed within Tables 1-1 through1-5, Table 2, Table 3, Table 4-1 through 4-3, and Table 5. [Violation Risk Factor: High][Time Horizon: Operations Planning]M3. Each Transmission Owner, Generator Owner, and Distribution Provider that utilizestime-based maintenance program(s) shall have evidence that it has maintained itsProtection System, Automatic Reclosing, and Sudden Pressure Relaying Componentsincluded within its time-based program in accordance with Requirement R3. Theevidence may include, but is not limited to, dated maintenance records, datedmaintenance summaries, dated check-off lists, dated inspection records, or datedwork orders.R4. Each Transmission Owner, Generator Owner, and Distribution Provider that utilizesperformance-based maintenance program(s) in accordance with Requirement R2 shallimplement and follow its PSMP for its Protection System, Automatic Reclosing, andSudden Pressure Relaying Components that are included within the performancebased program(s). [Violation Risk Factor: High] [Time Horizon: Operations Planning]M4. Each Transmission Owner, Generator Owner, and Distribution Provider that utilizesperformance-based maintenance intervals in accordance with Requirement R2 shallhave evidence that it has implemented the PSMP for the Protection System,Automatic Reclosing, and Sudden Pressure Relaying Components included in itsperformance-based program in accordance with Requirement R4. The evidence mayinclude, but is not limited to, dated maintenance records, dated maintenancesummaries, dated check-off lists, dated inspection records, or dated work orders.R5. Each Transmission Owner, Generator Owner, and Distribution Provider shalldemonstrate efforts to correct identified Unresolved Maintenance Issues. [ViolationRisk Factor: Medium] [Time Horizon: Operations Planning]M5. Each Transmission Owner, Generator Owner, and Distribution Provider shall haveevidence that it has undertaken efforts to correct identified Unresolved MaintenanceIssues in accordance with Requirement R5. The evidence may include, but is notlimited to, work orders, replacement Component orders, invoices, project scheduleswith completed milestones, return material authorizations (RMAs) or purchaseorders.C. Compliance1.Compliance Monitoring Process1.1. Compliance Enforcement AuthorityAs defined in the NERC Rules of Procedure, “Compliance EnforcementAuthority” means NERC or the Regional Entity in their respective roles ofmonitoring and enforcing compliance with the NERC Reliability Standards.Page 5 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying Maintenance1.2. Evidence RetentionThe following evidence retention periods identify the period of time an entity isrequired to retain specific evidence to demonstrate compliance. For instanceswhere the evidence retention period specified below is shorter than the timesince the last audit, the Compliance Enforcement Authority may ask an entity toprovide other evidence to show that it was compliant for the full time periodsince the last audit.The Transmission Owner, Generator Owner, and Distribution Provider shalleach keep data or evidence to show compliance as identified below unlessdirected by its Compliance Enforcement Authority to retain specific evidence fora longer period of time as part of an investigation.For Requirement R1, the Transmission Owner, Generator Owner, andDistribution Provider shall each keep its current dated PSMP, as well as anysuperseded versions since the preceding compliance audit, including thedocumentation that specifies the type of maintenance program applied for eachProtection System, Automatic Reclosing, or Sudden Pressure RelayingComponent Type.For Requirement R2, Requirement R3, and Requirement R4, in cases where theinterval of the maintenance activity is longer than the audit cycle, theTransmission Owner, Generator Owner, and Distribution Provider shall eachkeep documentation of the most recent performance of that maintenanceactivity for the Protection System, Automatic Reclosing, or Sudden PressureRelaying Component. In cases where the interval of the maintenance activity isshorter than the audit cycle, documentation of all performances (in accordancewith the tables) of that maintenance activity for the Protection System,Automatic Reclosing, or Sudden Pressure Relaying Component since theprevious scheduled audit date shall be retained.For Requirement R5 the Transmission Owner, Generator Owner, andDistribution Provider shall each keep documentation of UnresolvedMaintenance Issues identified by the entity since the last audit, including allthat were resolved since the last audit.1.3. Compliance Monitoring and Assessment Processes:Compliance AuditsSelf-CertificationsSpot CheckingCompliance InvestigationsPage 6 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceSelf-ReportingComplaints1.4. Additional Compliance InformationNonePage 7 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceTable of Compliance ElementsRequirementNumberR1Lower VSLModerate VSLHigh VSLSevere VSLThe entity’s PSMP failed to specifywhether one Component Type isbeing addressed by time-based orperformance-based maintenance, ora combination of both (Part 1.1).The entity’s PSMP failed to specifywhether two Component Types arebeing addressed by time-based orperformance-based maintenance,or a combination of both (Part 1.1).The entity’s PSMP failed to specifywhether three Component Typesare being addressed by time-basedor performance-based maintenance,or a combination of both. (Part 1.1).The entity failed to establish aPSMP.ORThe entity’s PSMP failed to includethe applicable monitoring attributesapplied to each Component Typeconsistent with the maintenanceintervals specified in Tables 1-1through 1-5, Table 2, Table 3, Tables4-1 through 4-3, and Table 5 wheremonitoring is used to extend themaintenance intervals beyond thosespecified for unmonitoredComponents (Part 1.2).R2The entity uses performance-basedmaintenance intervals in its PSMPbut failed to reduce CountableEvents to no more than 4% withinthree years.NAThe entity uses performance-basedmaintenance intervals in its PSMPbut failed to reduce CountableEvents to no more than 4% withinfour years.ORThe entity’s PSMP failed to specifywhether four or more ComponentTypes are being addressed by timebased or performance-basedmaintenance, or a combination ofboth (Part 1.1).ORThe entity’s PSMP failed to includeapplicable station batteries in atime-based program (Part 1.1).The entity uses performance-basedmaintenance intervals in its PSMPbut:1) Failed to establish thetechnical justificationdescribed within RequirementR2 for the initial use of theperformance-based PSMPOR2) Failed to reduce CountableEvents to no more than 4%within five yearsORPage 8 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceRequirementNumberLower VSLModerate VSLHigh VSLSevere VSL3) Maintained a Segment withless than 60 ComponentsOR4) Failed to: Annually update the list ofComponents,OR Annually performmaintenance on thegreater of 5% of theSegment population or 3Components,OR Annually analyze theprogram activities andresults for each Segment.R3For Components included within atime-based maintenance program,the entity failed to maintain 5% orless of the total Componentsincluded within a specificComponent Type in accordance withthe minimum maintenance activitiesand maximum maintenance intervalsprescribed within Tables 1-1 through1-5, Table 2, Table 3, Tables 4-1through 4-3, and Table 5.For Components included within atime-based maintenance program,the entity failed to maintain morethan 5% but 10% or less of the totalComponents included within aspecific Component Type inaccordance with the minimummaintenance activities andmaximum maintenance intervalsprescribed within Tables 1-1through 1-5, Table 2, Table 3,Tables 4-1 through 4-3, and Table 5.For Components included within atime-based maintenance program,the entity failed to maintain morethan 10% but 15% or less of thetotal Components included within aspecific Component Type inaccordance with the minimummaintenance activities andmaximum maintenance intervalsprescribed within Tables 1-1through 1-5, Table 2, Table 3, Tables4-1 through 4-3, and Table 5.For Components included within atime-based maintenance program,the entity failed to maintain morethan 15% of the total Componentsincluded within a specificComponent Type in accordancewith the minimum maintenanceactivities and maximummaintenance intervals prescribedwithin Tables 1-1 through 1-5,Table 2, Table 3, Tables 4-1through 4-3, and Table 5.Page 9 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceRequirementNumberLower VSLModerate VSLHigh VSLSevere VSLR4For Components included within aperformance-based maintenanceprogram, the entity failed tomaintain 5% or less of the annualscheduled maintenance for a specificComponent Type in accordance withtheir performance-based PSMP.For Components included within aperformance-based maintenanceprogram, the entity failed tomaintain more than 5% but 10% orless of the annual scheduledmaintenance for a specificComponent Type in accordancewith their performance-basedPSMP.For Components included within aperformance-based maintenanceprogram, the entity failed tomaintain more than 10% but 15% orless of the annual scheduledmaintenance for a specificComponent Type in accordance withtheir performance-based PSMP.For Components included within aperformance-based maintenanceprogram, the entity failed tomaintain more than 15% of theannual scheduled maintenance fora specific Component Type inaccordance with theirperformance-based PSMP.R5The entity failed to undertake effortsto correct 5 or fewer identifiedUnresolved Maintenance Issues.The entity failed to undertakeefforts to correct greater than 5 butless than or equal to 10 identifiedUnresolved Maintenance Issues.The entity failed to undertakeefforts to correct greater than 10but less than or equal to 15identified Unresolved MaintenanceIssues.The entity failed to undertakeefforts to correct greater than 15identified Unresolved MaintenanceIssues.Page 10 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceD. Regional VariancesNone.E. InterpretationsNone.Supplemental Reference DocumentsThe following documents present a detailed discussion about determination ofmaintenance intervals and other useful information regarding establishment of amaintenance program.1. Supplementary Reference and FAQ - PRC-005-6 Protection System Maintenance,Protection System Maintenance and Testing Standard Drafting Team (July 2015)2. Considerations for Maintenance and Testing of Auto-reclosing Schemes, NERC SystemAnalysis and Modeling Subcommittee, and NERC System Protection and ControlSubcommittee (November 2012)3. Sudden Pressure Relays and Other Devices that Respond to Non-Electrical Quantities –SPCS Input for Standard Development in Response to FERC Order No. 758, NERC SystemProtection and Control Subcommittee (December 2013)4. Sudden Pressure Relays and Other Devices that Respond to Non-Electrical Quantities –Supplemental Information to Support Project 2007-17.3: Protection SystemMaintenance and Testing (October 31, 2014)Version HistoryVersionDateActionChange Tracking0February 8, 2005Adopted by NERC Board ofTrusteesNew1February 7, 2006Adopted by NERC Board ofTrustees1.Changed incorrect useof certain hyphens (-) to “endash” (–) and “em dash (—).”2.Added “periods” toitems where appropriate.Changed “Timeframe” to“Time Frame” in item D, 1.2.1March 16, 2007PRC-005-1 Approved by FERC.Docket No. RM06-16-000Page 11 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceVersionDate1aFebruary 17, 2011Adopted by NERC Board ofTrustees1aSeptember 26,2011Approved by FERC. Docket No.RD11-5-0001bNovember 5, 2009Adopted by NERC Board ofTrusteesInterpretation of R1, R1.1, andR1.2 developed by Project2009-101bFebruary 3, 2012FERC Order approving reviseddefinition of “ProtectionSystem”Per footnote 8 of FERC’s order,the definition of “ProtectionSystem” supersedesinterpretation “b” of PRC-0051b upon the effective date ofthe modified definition (i.e.,April 1, 2013)See N. Amer. Elec. ReliabilityCorp., 138 FERC ¶ 61,095(February 3, 2012).1bFebruary 3, 2012PRC-005-1b Approved by FERC.Docket No. RM10-5-0001.1bMay 9, 2012Adopted by NERC Board ofTrustees1.1bSeptember 19,2013PRC-005-1.1b Approved byFERC. Docket No. RM12-16-000November 7, 2012Adopted by NERC Board ofTrustees2ActionChange TrackingAdded Appendix 1 Interpretation regardingapplicability of standard toprotection of radiallyconnected transformersdeveloped in Project 2009-17Errata change developed byProject 2010-07, clarifiedinclusion of generatorinterconnection Facility inGenerator Owner’sresponsibilityProject 2007-17 - Completerevision, absorbingmaintenance requirementsfrom PRC-005-1.1b, PRC-0080, PRC-011-0, PRC-017-0Page 12 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceVersionDateActionChange Tracking2October 17, 2013Approved by NERC StandardsCommittee2December 19,2013PRC-005-2 Approved by FERC.Docket No. RM13-7-0002March 7, 2014Adopted by NERC Board ofTrusteesModified R1 VSL in responseto FERC directive (no changeto standard version number)2(i)November 13,2014Adopted by NERC Board ofTrusteesApplicability section revised byProject 2014-01 to clarifyapplication of Requirements toBES dispersed powerproducing resources2(i)May 29, 2015PRC-005-2(i) Approved by FERC.Docket No. RD15-3-0002(ii)November 13,2014Adopted by NERC Board ofTrusteesReplaced references to SpecialProtection System and SPSwith Remedial Action Schemeand RASNovember 7, 2013Adopted by the NERC Board ofTrusteesRevised to address the FERCdirective in Order No. 758 toinclude Automatic Reclosing inmaintenance programs3Errata Change: The StandardsCommittee approved an erratachange to the implementationplan for PRC-005-2 to add thephrase “or as otherwise madeeffective pursuant to the lawsapplicable to such EROgovernmental authorities;” tothe second sentence underthe “Retirement of ExistingStandards” section. (nochange to standard versionnumber)Page 13 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceVersionDateActionChange Tracking3February 12, 2014Approved by NERC StandardsCommitteeErrata Change: The StandardsCommittee approved erratachanges to correctcapitalization of certaindefined terms within thedefinitions of “UnresolvedMaintenance Issue” and“Protection SystemMaintenance Program”. Thechanges will be reflected inthe definitions section of PRC005-3 for “UnresolvedMaintenance Issue” and in theNERC Glossary of Terms for“Protection SystemMaintenance Program". (nochange to standard versionnumber)3March 7, 2014Adopted by NERC Board ofTrusteesModified R1 VSL in responseto FERC directive (no changeto standard version number)3January 22, 2015PRC-005-3 Approved by FERC.Docket No. RM14-8-0003(i)November 13,2014Adopted by NERC Board ofTrustees3(i)May 29, 2015PRC-005-3(i) Approved by FERC.Docket No. RD15-3-0003(ii)November 13,2014Adopted by NERC Board ofTrusteesReplaced references to SpecialProtection System and SPSwith Remedial Action Schemeand RAS4November 13,2014Adopted by NERC Board ofTrusteesAdded Sudden PressureRelaying in response to FERCOrder No. 7584Sept 17, 2015PRC-005-4 Approved by FERC.Docket No. RM15-9-000Applicability section revised byProject 2014-01 to clarifyapplication of Requirements toBES dispersed powerproducing resourcesPage 14 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceVersionDateActionChange Tracking5May 7, 2015Adopted by NERC Board ofTrusteesApplicability section revised byProject 2014-01 to clarifyapplication of Requirements toBES dispersed powerproducing resources.6November 5, 2015Adopted by NERC Board ofTrusteesRevised to add supervisoryrelays, the voltage sensingdevices, and the associatedcontrol circuitry to AutomaticReclosing in accordance withthe directives in FERC Order803.6December 18,2015FERC Letter Order approvingPRC-005-6. Docket No. RD16-2000.Page 15 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceTable 1-1Component Type - Protective RelayExcluding distributed UFLS and distributed UVLS (see Table 3)Component AttributesMaximumMaintenanceInterval 3Maintenance ActivitiesFor all unmonitored relays: Verify that settings are as specifiedFor non-microprocessor relays:Any unmonitored protective relay not having all the monitoring attributesof a category below.6 CalendarYears Test and, if necessary calibrateFor microprocessor relays: Verify operation of the relay inputs and outputs that areessential to proper functioning of the Protection System. Verify acceptable measurement of power system input values.Monitored microprocessor protective relay with the following: Internal self-diagnosis and alarming (see Table 2). Voltage and/or current waveform sampling three or more times perpower cycle, and conversion of samples to numeric values formeasurement calculations by microprocessor electronics. Alarming for power supply failure (see Table 2).Verify:12 CalendarYears Settings are as specified. Operation of the relay inputs and outputs that are essential toproper functioning of the Protection System. Acceptable measurement of power system input values.For the tables in this standard, a calendar year starts on the first day of a new year (January 1) after a maintenance activity has been completed.For the tables in this standard, a calendar month starts on the first day of the first month after a maintenance activity has been completed.3Page 16 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceTable 1-1Component Type - Protective RelayExcluding distributed UFLS and distributed UVLS (see Table 3)Component AttributesMaximumMaintenanceInterval 3Maintenance ActivitiesMonitored microprocessor protective relay with preceding rowattributes and the following: Ac measurements are continuously verified by comparison to anindependent ac measurement source, with alarming for excessiveerror (See Table 2). Some or all binary or status inputs and control outputs are monitoredby a process that continuously demonstrates ability to perform asdesigned, with alarming for failure (See Table 2).12 CalendarYearsVerify only the unmonitored relay inputs and outputs that areessential to proper functioning of the Protection System. Alarming for change of settings (See Table 2).Page 17 of 40
Standard PRC-005-6 – Protection System, Automatic Reclosing, and Sudden Pressure Relaying MaintenanceTable 1-2Component Type - Communications SystemsExcluding distributed UFLS and distributed UVLS (see Table 3)Component AttributesMaximumMaintenanceInterval4 CalendarMonthsAny unmonitored communications system necessary for correctoperation of protective functions, and not having all the monitoringattributes of a category below.6 Calendar YearsMaintenance ActivitiesVerify that the communications system is functional.Verify that the communications system meets performance criteriapertinent to the communications technology applied (e.g. signallevel, reflected power, or data error rate).Verify operation of communications system inputs and outputs thatare essential to proper functioning of the Protection System.Any communications system with continuous monitoring or periodicautomated testing for the presence of the channel function, andalarming for loss of function (See Table 2).12 CalendarYearsVerify that the communications system meets performance criteriapertinent to the communications technology applied (e.g. signallevel, reflected power, or data error rate).Verify operation of communications system inputs and outputs th
Authority” means NERC or the Regional Entity in their respective roles of monitoring and enforcing compliance with the NERC Reliability Standards. Page 5 of 40 . Standard PRC-005-6 – Protection System, Automatic
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