cover sheetTCE CONSULTING ENGINEERS LIMITED30421008-3OQ-00002-P0CSHEET 1 OF 1I/O LIST FOR SEQUENCE OF EVENTS RECORDERSAUDI ELECTRICITY COMPANYEASTERN OPERATING AREADammam, Saudi ArabiaGENERATION EXPANSION OF RAFHA POWER PLANT(CONTRACT NO : 30421008/00)I/O LIST FOR SEQUENCE OF EVENTS RECORDERDOCUMENT NO : 30421008-3OQ-00002-P0CJUNE 2005ENGINEERING CONSULTANTTCE CONSULTING ENGINEERS LIMITED73/1, ST.MARK'S ROADBANGALORE 560001INDIACONTRACTOR:AL-TOUKHI COMPANY FOR INDUSTRY & TRADINGP.O.BOX 497, RIYADH 11411, KINGDOM OF SAUDI ARABIATEL.00966-1-4633660 : FAX.00966-1-4631150P0C 02.06.2005AESRREV NO. DATEPREPARED BYCHECKED BYCLEARED BYAPPROVED BY

Rafha Power PlantSl.NoAlarm codeTag NoList of Digital Signals for SOERRemarksA.Generator Transformer of Unit-1-T601163-1 GTT601 Buchholz relay alarm operated263-2 GTT601 Buchholz relay Trip operated363-1 OLTCOLTC of T601 Buchholz relay alarm operated463-2 OLTCOLTC of T601 Buchholz relay Trip operated549-1 OGTT601 Oil temperature high - Alarm649-2 OGTT601 Oil temperature very high - Trip749-1 WGTT601 Winding Temperature high - Alarm849-2 WGTT601 Winding Temperature very high - Trip971 GTT601 Low Oil Level - Trip1063 PRGTT601 Pressure Relief Device operated - Trip11COOLER FAILURET601 Cooling System failed - Trip1287 GTT601 87GT Differential protection PH-A operated1387 GTT601 87GT Differential protection PH-B operated1487 GTT601 87GT Differential protection PH-C operated1587 GTGT601 Restricted Ground Differential protection operated1651N GGTT601 Ground Over Current backup protection operated1787 OAT601 Overall Unit Differential Protection PH-A operated1887 OAT601 Overall Unit Differential Protection PH-B operated1987 OAT601 Overall Unit Differential Protection PH-C operated2087 GT FDRT601 33kV side Feeder Differential protection PH-A operated2187 GT FDRT601 33kV side Feeder Differential protection PH-B operated2287 GT FDRT601 33kV side Feeder Differential protection PH-C operated2351 GTT601 phase fault back up over current protection PH-A operated2451 GTT601 phase fault back up over current protection PH-B operated2551 GTT601 phase fault back up over current protection PH-C operated262/50 BFT601 33kV Side Breaker Failure protection Timer operated - I stage-Alarm2750 BFT601 33kV Side Breaker failure relay operated - II stage2886 A401T601 33kV Side Breaker Lockout relay operated2974/86T601 33kV Side Breaker Lockout relay supervision relay operated3074/TC-1T601 33kV Side Trip Coil-1 Supervision relay operated3174/TC-2T601 33kV Side Trip Coil-2 Supervision relay operated3274/DCDC Supply Failure/Supervision relay operated3327T601 Tap changer device fail alarm34OLTC pressure relief device operated35OLTC protection relay operated36OLTC Low oil level alarm37Transformer membrane failure alarm38Cooling system failed alarm39Transformer low oil level alarm40Maintenance switch open4174DCDC circuit supervision relay (74DC)in the ckt of 86-14274DCDC circuit supervision relay (74DC)in the ckt of 86-243Primary protection SOE common +ve open44Backup protection SOE common +ve open45Mechanical protection SOE common +ve open4686-1 Trip opened at FT4786-2 Trip opened at FT4886-3 Trip opened at FT4987GTRelay 87GT faulty5050/51Relay 50/51 GT faulty5187OAOverall differential relay 87OA faulty5287 GT FDRFeeder differential relay 87GT FDR faultyB.Generator Transformer of Unit-25363-1 GTT602 Buchholz relay alarm operated5463-1 OLTCOLTC of T602 Buchholz relay alarm operated5563-2 OLTCOLTC of T602 Buchholz relay Trip operated5663-OLTCOLTC of T602 Buchholz relay Trip operated5749-1 OGTT602 Oil temperature high - Alarm5849-2 OGTT602 Oil temperature very high - Trip5949-1 WGTT602 Winding Temperature high - Alarm6049-2 WGTT602 Winding Temperature very high - Trip6171 GTT602 Low Oil Level - Trip6263 PRGTT602 Pressure Relief Device operated - Trip63COOLER FAILURET602 Cooling System failed - Trip6487 GTT602 87GT Differential protection PH-A operated6587 GTT602 87GT Differential protection PH-B operated6687 GTT602 87GT Differential protection PH-C operated6787 GTGT602 Restricted Ground Differential protection operated6851N GGTT602 Ground Over Current backup protection operated6987 OAT602 Overall Unit Differential Protection PH-A operated7087 OAT602 Overall Unit Differential Protection PH-B operated7187 OAT602 Overall Unit Differential Protection PH-C operated7287 GT FDRT602 33kV side Feeder Differential protection PH-A operated7387 GT FDRT602 33kV side Feeder Differential protection PH-B operated7487 GT FDRT602 33kV side Feeder Differential protection PH-C operated7551 GTT602 phase fault back up over current protection PH-A operated7651 GTT602 phase fault back up over current protection PH-B operated7751 GTT602 phase fault back up over current protection PH-C operated782/50 BFT602 33kV Side Breaker Failure protection Timer operated - I stage-Alarm7950 BFT602 33kV Side Breaker failure relay operated - II stage8086 A401T602 33kV Side Breaker Lockout relay operated8174/86T601 33kV Side Breaker Lockout relay supervision relay operated8274/TC-1T602 33kV Side Trip Coil-1 Supervision relay operated8374/TC-2T602 33kV Side Trip Coil-2 Supervision relay operated - Trip Coil-2 faulty8474/DCDC Supply Failure/Supervision relay operated8527T602 Tap changer device fail alarm86OLTC pressure relief device operated87OLTC protection relay operated88OLTC Low oil level alarm89Transformer membrane failure alarm90Cooling system failed alarm91Transformer low oil level alarm92Maintenance switch open9374DCDC circuit supervision relay (74DC)in the ckt of 86-19474DCDC circuit supervision relay (74DC)in the ckt of 86-295Primary protection SOE common +ve open96Backup protection SOE common +ve open97Mechanical protection SOE common +ve open9886-1 Trip opened at FT9986-2 Trip opened at FT10086-3 Trip opened at FT10187GTRelay 87GT faulty10250/51Relay 50/51 GT faulty10387OAOverall differential relay 87OA faulty10487 GT FDRFeeder differential relay 87GT FDR faultyC.Generator Transformer of Future Unit10563-1 GTT603 Buchholz relay alarm operated10663-2 GTT603 Buchholz relay Trip operated10763-1 OLTCOLTC of T603 Buchholz relay alarm operated10863-2 OLTCOLTC of T603 Buchholz relay Trip operated10949-1 OGTT603 Oil temperature high - Alarm11049-2 OGTT603 Oil temperature very high - Trip11149-1 WGTT603 Winding Temperature high - Alarm11249-2 WGTT603 Winding Temperature very high - Trip11371 GTT603 Low Oil Level - Trip11463 PRGTT603 Pressure Relief Device operated - Trip115COOLER FAILURET603 Cooling System failed - Trip11687 GTT603 87GT Differential protection PH-A operated11787 GTT603 87GT Differential protection PH-B operated11887 GTT603 87GT Differential protection PH-C operated11987 GTGT603 Restricted Ground Differential protection operated12051N GGTT603 Ground Over Current backup protection operated12187 OAT603 Overall Unit Differential Protection PH-A operated12287 OAT603 Overall Unit Differential Protection PH-B operated12387 OAT603 Overall Unit Differential Protection PH-C operated12487 GT FDRT603 33kV side Feeder Differential protection PH-A operated12587 GT FDRT603 33kV side Feeder Differential protection PH-B operated12687 GT FDRT603 33kV side Feeder Differential protection PH-C operated12751 GTT603 phase fault back up over current protection PH-A operated12851 GTT603 phase fault back up over current protection PH-B operated12951 GTT603 phase fault back up over current protection PH-C operated1302/50 BFT603 33kV Side Breaker Failure protection Timer operated - I stage-Alarm13150 BFT603 33kV Side Breaker failure relay operated - II stage13286 A401T603 33kV Side Breaker Lockout relay operated13374/86T601 33kV Side Breaker Lockout relay supervision relay operated13474/TC-1T603 33kV Side Trip Coil-1 Supervision relay operated13574/TC-2T603 33kV Side Trip Coil-2 Supervision relay operated13674/DCDC Supply Failure/Supervision relay operated13727T603 Tap changer device fail alarm138OLTC pressure relief device operated139OLTC protection relay operated140OLTC Low oil level alarm141Transformer membrane failure alarm142Cooling system failed alarm143Transformer low oil level alarm144Maintenance switch open14574DCDC circuit supervision relay (74DC)in the ckt of 86-114674DCDC circuit supervision relay (74DC)in the ckt of 86-2147Primary protection SOE common +ve open148Backup protection SOE common +ve open149Mechanical protection SOE common +ve open15086-1 Trip opened at FT15186-2 Trip opened at FT15286-3 Trip opened at FT15387GTRelay 87GT faulty15450/51Relay 50/51 GT faulty15587OAOverall differential relay 87OA faulty15687 GT FDRFeeder differential relay 87GT FDR faultyDUnit Auxiliary Transformer UAT 30115749-1WUATUnit Auxiliary Transformer Winding Temperature high - Alarm15849-2WUATUnit Auxiliary Transformer Winding Temperature very high -Trip15951G UATUnit Auxiliary Transformer Ground Over Current protection operated16051G UATUnit Auxiliary Transformer Ground Over Current relay faulty16150/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -A operated16250/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -B operated16350/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -C operated16450/51 UATUnit Auxiliary Transformer HV Side over current relay faulty16550/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-A operated16650/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-B operated16750/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-C operated16851NUnit Auxiliary Transformer UAT301 Inverse Ground fault protection operated16950/51NUnit Auxiliary Transformer LV side O/C, E/F relay faulty17086-A201Unit Auxiliary Transformer UAT301 Breaker Lockout relay operated17174/86Unit Auxiliary Transformer UAT301 Breaker Lockout relay supervision relay operated17274/TCUnit Auxiliary Transformer UAT301 Breaker Trip Coil Supervision relay operated17374/DCUnit Auxiliary Transformer UAT301 Breaker DC Supply Failure relay operated17486-UATUnit Auxiliary Transformer Lockout relay operated17574/86/UATUnit Auxiliary Transformer Lockout relay supervision relay operated176Unit Auxiliary Transformer maintenance contact openEUnit Auxiliary Transformer UAT 301 LV side Breaker(A201)17774/TCUnit Auxiliary Transformer Breaker Trip Coil Supervision relay operated178Unit Auxiliary Transformer Breaker Status179Unit Auxiliary Transformer Breaker Operating Mechanism failedFUnit Auxiliary Transformer UAT 30218049-1WUATUnit Auxiliary Transformer Winding Temperature high - Alarm18149-2WUATUnit Auxiliary Transformer Winding Temperature very high -Trip18251G UATUnit Auxiliary Transformer Ground Over Current protection operated18350/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -A operated18450/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -B operated18550/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -C operated18650/51 UATUnit Auxiliary Transformer HV Side over current relay faulty18750/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-A operated18850/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-B operated18950/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-C operated19051NUnit Auxiliary Transformer UAT302 Inverse Ground fault protection operated19150/51NUnit Auxiliary Transformer LV side O/C, E/F relay faulty19286-A202Unit Auxiliary Transformer UAT302 Breaker Lockout relay operated19374/86Unit Auxiliary Transformer UAT302 Breaker Lockout relay supervision relay operated19474/TCUnit Auxiliary Transformer UAT302 Breaker Trip Coil Supervision relay operated19574/DCUnit Auxiliary Transformer UAT302 Breaker DC Supply Failure relay operated19686-UATUnit Auxiliary Transformer Lockout relay operated19774/86/UATUnit Auxiliary Transformer Lockout relay supervision relay operated198Unit Auxiliary Transformer maintenance contact openGUnit Auxiliary Transformer UAT 302 LV side Breaker(A201)19974/TCUnit Auxiliary Transformer Breaker Trip Coil Supervision relay operated200Unit Auxiliary Transformer Breaker Status201Unit Auxiliary Transformer Breaker Operating Mechanism failedHUnit Auxiliary Transformer (Future Unit)20249-1WUATUnit Auxiliary Transformer Winding Temperature high - Alarm20349-2WUATUnit Auxiliary Transformer Winding Temperature very high -Trip20451G UATUnit Auxiliary Transformer Ground Over Current protection operated20551G UATUnit Auxiliary Transformer Ground Over Current relay faulty20650/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -A operated20750/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -B operated20850/51 UATUnit Auxiliary Transformer HV Side over current protection Phase -C operated20950/51 UATUnit Auxiliary Transformer HV Side over current relay faulty21050/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-A operated21150/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-B operated21250/51Unit Auxiliary Transformer LV side INST/ Inverse Time Over current protection Phase-C operated21351NUnit Auxiliary Transformer UAT303 Inverse Ground fault protection operated21450/51NUnit Auxiliary Transformer LV side O/C, E/F relay faulty21586-A203Unit Auxiliary Transformer UAT303 Breaker Lockout relay operated21674/86Unit Auxiliary Transformer UAT303 Breaker Lockout relay supervision relay operated21774/TCUnit Auxiliary Transformer UAT303 Breaker Trip Coil Supervision relay operated21874/DCUnit Auxiliary Transformer UAT303 Breaker DC Supply Failure relay operated21986-UATUnit Auxiliary Transformer Lockout relay operated22074/86/UATUnit Auxiliary Transformer Lockout relay supervision relay operated221Unit Auxiliary Transformer maintenance contact openIUnit Auxiliary Transformer UAT 303 LV side Breaker(A201)22274/TCUnit Auxiliary Transformer Breaker Trip Coil Supervision relay operated223Unit Auxiliary Transformer Breaker Status224Unit Auxiliary Transformer Breaker Operating Mechanism failedJStation Auxiliary Transformer SAT T20122563-1 SATStation Aux.Transformer T201 Buchholz relay alarm operated22663-2 SATStation Aux.Transformer T201 Buchholz relay Trip operated22749-1 OSATStation Aux.Transformer T201 Oil temperature high - Alarm22849-2 OSATStation Aux.Transformer T201 Oil temperature very high - Trip22949-1 WSATStation Aux.Transformer T201 Winding Temperature high - Alarm23049-2 WSATStation Aux.Transformer T201 Winding Temperature very high - Trip23171 SATStation Aux.Transformer T201 Low Oil Level - Alarm23263 P SATStation Aux.Transformer T201 Pressure Relief Device operated - Trip23351G LVStation Aux.Transformer T201 Neutral Ground Fault protection operated23451G LVStation Aux.Transformer T201 Neutral Ground Fault relay faulty23550/51Station Aux.Transformer T201 HV BKR INST/ Inverse Time O/C Phase-A operated23650/51Station Aux.Transformer T201 HV BKR INST/ Inverse Time O/C Phase-B operated23750/51Station Aux.Transformer T201 HV BKR INST/ Inverse Time O/C Phase-C operated23850N/51NStation Aux.Transformer T201 HV BKR INST/ Inverse Time Ground fault protection operated23950/51NStation Aux.Transformer T201 HV BKR INST/ Inverse Time O/C, E/F relay faulty.24050GStation Aux.Transformer T201 HV BKR CBCT protection operated24186 B209Station Aux.Transformer T201 HV BKR Lockout relay operated24274/86Station Aux.Transformer T201 HV BKR Lockout relay supervision relay operated24386 A101Station Aux.Transformer T201 LV BKR Lockout relay operated24474/86Station Aux.Transformer T201 LV BKR Lockout relay supervision relay operated24574 TCStation Aux.Transformer T201 LV BKR Trip coil supervision relay operated24674 DCStation Aux.Transformer T201 LV BKR DC supply supervision relay operated24751Station Aux.Transformer T201 LV BKR inverse time O/C Phase -A operated24851Station Aux.Transformer T201 LV BKR inverse time O/C Phase -B operated24951Station Aux.Transformer T201 LV BKR inverse time O/C Phase -C operated25051NStation Aux.Transformer T201 LV BKR inverse time earthfault relay operated25151/51NStation Aux.Transformer T201 LV BKR inverse time O/C, E/F relay faulty252Maintenance switch openKStation Auxiliary Transformer SAT T20225363-1 SATStation Aux.Transformer T202 Buchholz relay alarm operated25463-2 SATStation Aux.Transformer T202 Buchholz relay Trip operated25549-1 OSATStation Aux.Transformer T202 Oil temperature high - Alarm25649-2 OSATStation Aux.Transformer T202 Oil temperature very high - Trip25749-1 WSATStation Aux.Transformer T202 Winding Temperature high - Alarm25849-2 WSATStation Aux.Transformer T202 Winding Temperature very high - Trip25971 SATStation Aux.Transformer T202 Low Oil Level - Alarm26063 P SATStation Aux.Transformer T202 Pressure Relief Device operated - Trip26151G LVStation Aux.Transformer T202 Neutral Ground Fault protection operated26251G LVStation Aux.Transformer T202 Neutral Ground Fault relay faulty26350/51Station Aux.Transformer T202 HV BKR INST/ Inverse Time O/C Phase-A operated26450/51Station Aux.Transformer T202 HV BKR INST/ Inverse Time O/C Phase-B operated26550/51Station Aux.Transformer T202 HV BKR INST/ Inverse Time O/C Phase-C operated26650N/51NStation Aux.Transformer T202 HV BKR INST/ Inverse Time Ground fault protection operated26750/51NStation Aux.Transformer T202 HV BKR INST/ Inverse Time O/C, E/F relay faulty.26850GStation Aux.Transformer T202 HV BKR CBCT protection operated26986 B213Station Aux.Transformer T202 HV BKR Lockout relay operated27074/86Station Aux.Transformer T202 HV BKR Lockout relay supervision relay operated27186 A102Station Aux.Transformer T202 LV BKR Lockout relay operated27274/86Station Aux.Transformer T202 LV BKR Lockout relay supervision relay operated27374 TCStation Aux.Transformer T202 LV BKR Trip coil supervision relay operated27474 DCStation Aux.Transformer T202 LV BKR DC supply supervision relay operated27551Station Aux.Transformer T202 LV BKR inverse time O/C Phase -A operated27651Station Aux.Transformer T202 LV BKR inverse time O/C Phase -B operated27751Station Aux.Transformer T202 LV BKR inverse time O/C Phase -C operated27851NStation Aux.Transformer T202 LV BKR inverse time earthfault relay operated27951/51NStation Aux.Transformer T202 LV BKR inverse time O/C, E/F relay faulty280Maintenance switch openLStation Auxiliary Transformer SAT T203(Future)28163-1 SATStation Aux.Transformer T203 Buchholz relay alarm operated28263-2 SATStation Aux.Transformer T203 Buchholz relay Trip operated28349-1 OSATStation Aux.Transformer T203 Oil temperature high - Alarm28449-2 OSATStation Aux.Transformer T203 Oil temperature very high - Trip28549-1 WSATStation Aux.Transformer T203 Winding Temperature high - Alarm28649-2 WSATStation Aux.Transformer T203 Winding Temperature very high - Trip28771 SATStation Aux.Transformer T203 Low Oil Level - Alarm28863 P SATStation Aux.Transformer T203 Pressure Relief Device operated - Trip28951G LVStation Aux.Transformer T203 Neutral Ground Fault protection operated29051G LVStation Aux.Transformer T203 Neutral Ground Fault relay faulty29150/51Station Aux.Transformer T203 HV BKR INST/ Inverse Time O/C Phase-A operated29250/51Station Aux.Transformer T203 HV BKR INST/ Inverse Time O/C Phase-B operated29350/51Station Aux.Transformer T203 HV BKR INST/ Inverse Time O/C Phase-C operated29450N/51NStation Aux.Transformer T203 HV BKR INST/ Inverse Time Ground fault protection operated29550/51NStation Aux.Transformer T203 HV BKR INST/ Inverse Time O/C, E/F relay faulty.29650GStation Aux.Transformer T203 HV BKR CBCT protection operated29786 B213Station Aux.Transformer T203 HV BKR Lockout relay operated29874/86Station Aux.Transformer T203 HV BKR Lockout relay supervision relay operated29986 A102Station Aux.Transformer T203 LV BKR Lockout relay operated30074/86Station Aux.Transformer T203 LV BKR Lockout relay supervision relay operated30174 TCStation Aux.Transformer T203 LV BKR Trip coil supervision relay operated30274 DCStation Aux.Transformer T203 LV BKR DC supply supervision relay operated30351Station Aux.Transformer T203 LV BKR inverse time O/C Phase -A operated30451Station Aux.Transformer T203 LV BKR inverse time O/C Phase -B operated30551Station Aux.Transformer T203 LV BKR inverse time O/C Phase -C operated30651NStation Aux.Transformer T203 LV BKR inverse time earthfault relay operated30751/51NStation Aux.Transformer T203 LV BKR inverse time O/C, E/F relay faulty308Maintenance switch openMStation Transformer ST T40130963-1 STStation Transformer T401 Buchholz relay alarm operated31063-2 STStation Transformer T401 Buchholz relay Trip operated31149-1 OSTStation Transformer T401 Oil temperature high - Alarm31249-2 OSTStation Transformer T401 Oil temperature very high - Trip31349-1 WSTStation Transformer T401 Winding Temperature high - Alarm31449-2 WSTStation Transformer T401 Winding Temperature very high - Trip31571 STStation Transformer T401 Low Oil Level - Alarm31663 PSTStation Transformer T401 Pressure Relief Device operated - Trip31763 OLTCStation Transformer T401 OLTC Buchholz trip31827Station Transformer T401 Tap changer device failure alarm31950N/51NStation Transformer T401 Neutral Ground fault protection operated32087REF LVStation Transformer T401 REF protection operated32150/51PStation Transformer T401 HV BKR INST/Inverse Time Over current primary protection(Phase A) operated32250/51PStation Transformer T401 HV BKR INST/Inverse Time Over current primary protection(Phase B) operated32350/51PStation Transformer T401 HV BKR INST/Inverse Time Over current primary protection(Phase C) operated32450/51SStation Transformer T401 HV BKR INST/Inverse Time Over current secondary protection operated32550N/51NPStation Transformer T401 HV BKR Ground fault primary protection operated32650N/51NSStation Transformer T401 HV BKR Ground fault secondary protection operated32787T T401Station Transformer T401 Differential Protection(Phase-A) operated32887T T401Station Transformer T401 Differential Protection(Phase-B) operated32987T T401Station Transformer T401 Differential Protection(Phase-C) operated3302/50 BFStation Transformer T401 HV side Breaker failure protection Timer operated -I stage Alarm33150 BFStation Transformer T401 HV side Breaker failure relay operated -II stage33286-1 T401Station Transformer T401 Lockout relay-1 operated33386-2 T401Station Transformer T401 Lockout relay-2 operated33486-3 T401Station Transformer T401 Lockout relay-3 operated33574/86-1Station Transformer T401 Lockout relay-1 supervision relay operated33674/86-2Station Transformer T401 Lockout relay-2 supervision relay operated33774/86-3Station Transformer T401 Lockout relay-3 supervision relay operated33874 TC-1Station Transformer T401 HV BKRTrip Coil-1 Supervision relay operated33974 TC-2Station Transformer T401 HV BKRTrip Coil-2 Supervision relay operated34086-1 B413Station Transformer T401 HV BKR Lockout relay -1 operated34186-2 B413Station Transformer T401 HV BKR Lockout relay -2 operated34274/86-1Station Transformer T401 HV BKR Lockout relay-1 supervision relay operated34374/86-2Station Transformer T401 HV BKR Lockout relay-2 supervision relay operated34474 DC-1Station Transformer T401 HV BKR DC supply-1 supervision operated34574 DC-2Station Transformer T401 HV BKR DC supply-2 supervision operated34667Station Transformer T401 LV BKR Directional Over current protection(Phase-A) operated34767Station Transformer T401 LV BKR Directional Over current protection(Phase-B) operated34867Station Transformer T401 LV BKR Directional Over current protection(Phase-C) operated34967NStation Transformer T401 LV BKR Directional earth fault protection operated35086 A204Station Transformer T401 LV BKR Lockout relay operated35174/86Station Transformer T401 LV BKR Lockout relay supervision relay operated35274 TC-1Station Transformer T401 LV BKR tripcoil-1 supervision operated35374 TC-2Station Transformer T401 LV BKR tripcoil-2 supervision operated35474 DC-1Station Transformer T401 LV BKR DC supply-1 supervision operated35574 DC-2Station Transformer T401 LV BKR DC supply-2 supervision operated356OLTC pressure relief device operated357OLTC protection relay operated358OLTC Low oil level alarm359Transformer membrane failure alarm360Maintenance switch openNStation Transformer ST 40236163-1 STStation Transformer T402 Buchholz relay alarm operated36263-2 STStation Transformer T402 Buchholz relay Trip operated36349-1 OSTStation Transformer T402 Oil temperature high - Alarm36449-2 OSTStation Transformer T402 Oil temperature very high - Trip36549-1 WSTStation Transformer T402 Winding Temperature high - Alarm36649-2 WSTStation Transformer T402 Winding Temperature very high - Trip36771 STStation Transformer T402 Low Oil Level - Alarm36863 PSTStation Transformer T402 Pressure Relief Device operated - Trip36963 OLTCStation Transformer T402 OLTC Buchholz trip37027Station Transformer T402 Tap changer device failure alarm37150N/51NStation Transformer T402 Neutral Ground Over Current protection operated37287REF LVStation Transformer T402 REF protection operated37350/51PStation Transformer T402 HV BKR INST/Inverse Time Over current primary protection(Phase A) operated37450/51PStation Transformer T402 HV BKR INST/Inverse Time Over current primary protection(Phase B) operated37550/51PStation Transformer T402 HV BKR INST/Inverse Time Over current primary protection(Phase C) operated37650/51SStation Transformer T402 HV BKR IDMT/Inverse Time Over current secondary protection operated37750N/51NPStation Transformer T402 HV BKR Ground fault Overcurrent primary protection operated37850N/51NSStation Transformer T402 HV BKR Ground fault Overcurrent secondary protection operated37987T T402Station Transformer T402 Differential Protection(Phase-A) operated38087T T402Station Transformer T402 Differential Protection(Phase-B) operated38187T T402Station Transformer T402 Differential Protection(Phase-C) operated3822/50 BFStation Transformer T402 HV side Breaker failure protection Timer operated -I stage Alarm38350 BFStation Transformer T402 HV side Breaker failure relay operated -Iistage38486-1 T402Station Transformer T402 Lockout relay-1 operated38586-2 T402Station Transformer T402 Lockout relay-2 operated38686-3 T402Station Transformer T402 Lockout relay-3 operated38774/86-1Station Transformer T402 Lockout relay-1 supervision relay operated38874/86-2Station Transformer T402 Lockout relay-2 supervision relay operated38974/86-3Station Transformer T402 Lockout relay-3 supervision relay operated39074 TC-1Station Transformer T402 HV BKRTrip Coil-1 Supervision relay operated39174 TC-2Station Transformer T402 HV BKRTrip Coil-2 Supervision relay operated39286-1 B422Station Transformer T402 HV BKR Lockout relay -1 operated39386-2 B422Station Transformer T402 HV BKR Lockout relay -2 operated39474/86-1Station Transformer T402 HV BKR Lockout relay-1 supervision relay operated39574/86-2Station Transformer T402 HV BKR Lockout relay-2 supervision relay operated39674 DC-1Station Transformer T402 HV BKR DC supply-1 supervision operated39774 DC-2Station Transformer T402 HV BKR DC supply-2 supervision operated39867Station Transformer T402 LV BKR Directional Over current protection(Phase-A) operated39967Station Transformer T402 LV BKR Directional Over current protection(Phase-B) operated40067Station Transformer T402 LV BKR Directional Over current protection(Phase-C) operated40167NStation Transformer T402 LV BKR Directional earth fault protection operated40286 A204Station Transformer T402 LV BKR Lockout relay operated40374/86Station Transformer T402 LV BKR Lockout relay supervision relay operated40474 TC-1Station Transformer T402 LV BKR tripcoil-1 supervision operated40574 TC-2Station Transformer T402 LV BKR tripcoil-2 supervision operated40674 DC-1Station Transformer T402 LV BKR DC supply-1 supervision operated40774 DC-2Station Transformer T402 LV BKR DC supply-2 supervision operated408OLTC pressure relief device operated409OLTC protection relay operated410OLTC Low oil level alarm411Transformer membrane failure alarm412Maintenance switch openOInterbus Transformer T-50141363-1 ITInterbus Transformer T501 Buchholz relay alarm operated41463-2 ITInterbus Transformer T501 Buchholz relay Trip operated41549-1 OITInterbus Transformer T501 Oil temperature high - Alarm41649-2 OITInterbus Transformer T501 Oil temperature very high - Trip41749-1 WITInterbus Transformer T501 Winding Temperature high - Alarm41849-2 WITInterbus Transformer T501 Winding Temperature very high - Trip41971 ITInterbus Transformer T501 Low Oil Level - Alarm42063 PITInterbus Transformer T501 Pressure Relief Device operated - Trip42151NInterbus Transformer T501 33kV side Neutral Ground Over Current protection operated42251NInterbus Transformer T501 13.8kV side Neutral ground over current protection operated42387REF HVInterbus Transformer T501 33kV Side Restricted earth fault protection operated42487REF LVInterbus Transformer T501 13.8kV Side Restricted earth fault protection operated42587 TInterbus Transformer T501 Differential Protection Phase-A operated (87T)42687 TInterbus Transformer T501 Differential Protection Phase-B operated (87T)42787 TInterbus Transformer T501 Differential Protection Phase-C operated (87T)42850/51Interbus Transformer T501 33kV Side INST/Inverse Time Over current protection Phase-A operated42950/51Interbus Transformer T501 33kV Side INST/Inverse Time Over current protection Phase-B operated43050/51Interbus Transformer T501 33kV Side INST/Inverse Time Over current protection Phase-C operated43150N/51NInterbus Transformer T501 33kV Side INST/Inverse Time Ground fault protection operated4322/50 BFInterbus Transformer T501 33kV side Breaker failure Protection Timer operated -I stage Alarm43350 BFInterbus Transformer T501 33kV side Breaker failure relay operated -IIstage43486-1 B411Interbus Transformer T501 33kV Side Breaker Lockout relay-1 operated43586-2 B411Interbus Transformer T501 33kV Side Breaker Lockout relay-2 operated43674/86Interbus Transformer T501 33kV Side Breaker Lockout relay supervision relay-1 operated43774/86Interbus Transformer T501 33kV Side Breaker Lockout relay supervision relay-2 operated43874 TC-1Interbus Transformer T501 33kV Side BreakerTrip Coil-1 Supervision relay operated43974 TC-1Interbus Transformer T501 33kV Side BreakerTrip Coil-2 Supervision relay operated44074 DC-1Interbus Transformer T501 33kV Side DC Supply -1 Failure/Supervision relay operated44174 DC-2Interbus Transformer T502 33kV Side DC Supply -2 Failure/Supervision relay operated442Transformer membrane failure alarm443Maintenance switch open444Cooling failure alarmPInterbus Transformer T-50244563-1 ITInterbus Transformer T502 Buchholz relay alarm operated44663-2 ITInterbus Transformer T502 Buchholz relay Trip operated44749-1 OITInterbus Transformer T502 Oil temperature high - Alarm44849-2 OITInterbus Transformer T502 Oil temperature very high - Trip44949-1 WITInterbus Transformer T502 Winding Temperature high - Alarm45049-2 WITInterbus Transformer T502 Winding Temperature very high - Trip45171 ITInterbus Transformer T502 Low Oil Level - Alarm45263 PITInterbus Transformer T502 Pressure Relief Device operated - Trip45351NInterbus Transformer T502 33kV side Neutral Ground Over Current protection operated45451NInterbus Transformer T502 13.8kV side Neutral ground over current protection operated45587REF HVInterbus Transformer T502 33kV Side Restricted earth fault protection operated45687REF LVInterbus Transformer T502 13.8kV Side Restricted earth fault protection operated45787 TInterbus Transformer T502 Differential Protection Phase-A operated (87T)45887 TInterbus Transformer T502 Differential Protection Phase-B operated (87T)45987 TInterbus Transformer T502 Differential Protection Phase-C operated (87T)46050/51Interbus Transformer T502 33kV Side INST/Inverse Time Over current protection Phase-A operated46150/51Interbus Transformer T502 33kV Side INST/Inverse Time Over current protection Phase-B operated46250/51Interbus Transformer T502 33kV Side INST/Inverse Time Over current protection Phase-C operated46350N/51NInterbus Transformer T502 33kV Side INST/Inverse Time Ground fault protection operated4642/50 BFInterbus Transformer T502 33kV side Breaker failure Protection Timer operated -I stage Alarm46550 BFInterbus Transformer T502 33kV side Breaker failure relay operated -IIstage46686-1 B423Interbus Transformer T502 33kV Side Breaker Lockout relay-1 operated46786-2 B423Interbus Transformer T502 33kV Side Breaker Lockout relay-2 operated46874/86Interbus Transformer T502 33kV Side Breaker Lockout relay supervision relay-1 operated46974/86Interbus Transformer T502 33kV Side Breaker Lockout relay supervision relay-2 operated47074 TC-1Interbus Transformer T502 33kV Side BreakerTrip Coil-1 Supervision relay operated47174 TC-1Interbus Transformer T502 33kV Side BreakerTrip Coil-2 Supervision relay operated47274 DC-1Interbus Transformer T502 33kV Side DC Supply -1 Failure/Supervision relay operated47374 DC-2Interbus Transformer T502 33kV Side DC Supply -2 Failure/Supervision relay operated474Transformer membrane failure alarm475Maintenance switch open476Cooling failure alarmQInterbus Transformer T-50347763-1 ITInterbus Transformer T503 Buchholz relay alarm operated47863-2 ITInterbus Transformer T503 Buchholz relay Trip operated47949-1 OITInterbus Transformer T503 Oil temperature high - Alarm48049-2 OITInterbus Transformer T503 Oil temperature very high - Trip48149-1 WITInterbus Transformer T503 Winding Temperature high - Alarm48249-2 WITInterbus Transformer T503 Winding Temperature very high - Trip48371 ITInterbus Transformer T503 Low Oil Level - Alarm48463 PITInterbus Transformer T503 Pressure Relief Device operated - Trip48551NInterbus Transformer T503 33kV side Neutral Ground Over Current protection operated48651NInterbus Transformer T503 13.8kV side Neutral ground over current protection operated48787REF HVInterbus Transformer T503 33kV Side Restricted earth fault protection operated48887REF LVInterbus Transformer T503 13.8kV Side Restricted earth fault protection operated48987 TInterbus Transformer T503 Differential Protection Phase-A operated (87T)49087 TInterbus Transformer T503 Differential Protection Phase-B operated (87T)49187 TInterbus Transformer T503 Differential Protection Phase-C operated (87T)49250/51Interbus Transformer T503 33kV Side INST/Inverse Time Over current protection Phase-A operated49350/51Interbus Transformer T503 33kV Side INST/Inverse Time Over current protection Phase-B operated49450/51Interbus Transformer T503 33kV Side INST/Inverse Time Over current protection Phase-C operated49550N/51NInterbus Transformer T503 33kV Side INST/Inverse Time Ground fault protection operated4962/50 BFInterbus Transformer T503 33kV side Breaker failure Protection Timer operated -I stage Alarm49750 BFInterbus Transformer T503 33kV side Breaker failure relay operated -IIstage49886-1 B424Interbus Transformer T503 33kV Side Breaker Lockout relay-1 operated49986-2 B424Interbus Transformer T503 33kV Side Breaker Lockout relay-2 operated50074/86Interbus Transformer T503 33kV Side Breaker Lockout relay supervision relay-1 operated50174/86Interbus Transformer T503 33kV Side Breaker Lockout relay supervision relay-2 operated50274 TC-1Interbus Transformer T503 33kV Side BreakerTrip Coil-1 Supervision relay operated50374 TC-1Interbus Transformer T503 33kV Side BreakerTrip Coil-2 Supervision relay operated50474 DC-1Interbus Transformer T503 33kV Side DC Supply -1 Failure/Supervision relay operated50574 DC-2Interbus Transformer T503 33kV Side DC Supply -2 Failure/Supervision relay operated506Transformer membrane failure alarm507Maintenance switch open508Cooling failure alarmRInterbus Transformer (Future)50963-1 ITInterbus Transformer T504 Buchholz relay alarm operated51063-2 ITInterbus Transformer T504 Buchholz relay Trip operated51149-1 OITInterbus Transformer T504 Oil temperature high - Alarm51249-2 OITInterbus Transformer T504 Oil temperature very high - Trip51349-1 WITInterbus Transformer T504 Winding Temperature high - Alarm51449-2 WITInterbus Transformer T504 Winding Temperature very high - Trip51571 ITInterbus Transformer T504 Low Oil Level - Alarm51663 PITInterbus Transformer T504 Pressure Relief Device operated - Trip51751NInterbus Transformer T504 33kV side Neutral Ground Over Current protection operated51851NInterbus Transformer T504 13.8kV side Neutral ground over current protection operated51987REF HVInterbus Transformer T504 33kV Side Restricted earth fault protection operated52087REF LVInterbus Transformer T504 13.8kV Side Restricted earth fault protection operated52187 TInterbus Transformer T504 Differential Protection Phase-A operated (87T)52287 TInterbus Transformer T504 Differential Protection Phase-B operated (87T)52387 TInterbus Transformer T504 Differential Protection Phase-C operated (87T)52450/51Interbus Transformer T504 33kV Side INST/Inverse Time Over current protection Phase-A operated52550/51Interbus Transformer T504 33kV Side INST/Inverse Time Over current protection Phase-B operated52650/51Interbus Transformer T504 33kV Side INST/Inverse Time Over current protection Phase-C operated52750N/51NInterbus Transformer T504 33kV Side INST/Inverse Time Ground fault protection operated5282/50 BFInterbus Transformer T504 33kV side Breaker failure Protection Timer operated -I stage Alarm52950 BFInterbus Transformer T504 33kV side Breaker failure relay operated -IIstage53086-1 B412Interbus Transformer T504 33kV Side Breaker Lockout relay-1 operated53186-2 B412Interbus Transformer T504 33kV Side Breaker Lockout relay-2 operated53274/86Interbus Transformer T504 33kV Side Breaker Lockout relay supervision relay-1 operated53374/86Interbus Transformer T504 33kV Side Breaker Lockout relay supervision relay-2 operated53474 TC-1Interbus Transformer T504 33kV Side BreakerTrip Coil-1 Supervision relay operated53574 TC-1Interbus Transformer T504 33kV Side BreakerTrip Coil-2 Supervision relay operated53674 DC-1Interbus Transformer T504 33kV Side DC Supply -1 Failure/Supervision relay operated53774 DC-2Interbus Transformer T504 33kV Side DC Supply -2 Failure/Supervision relay operated538Transformer membrane failure alarm539Maintenance switch open540Cooling failure alarm541BFR circuit supervision (74 DC-1) operatedS33kV Switchgear54287 FDR-133kV Tie feeder Differential protection phase -A operated (breaker at new 33kV Switchgear side)54387 FDR-133kV Tie feeder Differential protection phase -B operated (breaker at new 33kV Switchgear side)54487 FDR-133kV Tie feeder Differential protection phase -C operated (breaker at new 33kV Switchgear side)54587 FDR-233kV Tie feeder Differential protection phase-A operated (breaker at existing 33kV Switchgear side)54687 FDR-233kV Tie feeder Differential protection phase-B operated (breaker at existing 33kV Switchgear side)54787 FDR-233kV Tie feeder Differential protection phase-C operated (breaker at existing 33kV Switchgear side)5486733kV Tie feeder Directional overcurrent protection Phase-A operated (breaker at new 33kV Switchgear side)5496733kV Tie feeder Directional overcurrent protection Phase-B operated (breaker at new 33kV Switchgear side)5506733kV Tie feeder Directional overcurrent protection Phase-C operated (breaker at new 33kV Switchgear side)55167N33kV Tie feeder Directional ground fault overcurrent protection operated (breaker at new 33kV Switchgear side)5526733kV Tie feeder Directional overcurrent protection phase-A operated (breaker at existing 33kV Switchgear side)5536733kV Tie feeder Directional overcurrent protection phase-A operated (breaker at existing 33kV Switchgear side)5546733kV Tie feeder Directional overcurrent protection phase-A operated (breaker at existing 33kV Switchgear side)55567N33kV Tie feeder Directional ground fault overcurrent protection operated (breaker at existing 33kV Switchgear side)5562/50 BF33kV Tie feeder bkr.failure protection timer operated- Istage Alarm (breaker at new 33kV Switchgear side)55750 BF33kV Tie feeder bkr.failure protection relay operated-IIstage (breaker at new 33kV Switchgear side)5582/50 BF33kV Tie feeder bkr.failure protection timer operated- Istage Alarm (breaker at existing 33kV Switchgear side)55950 BF33kV Tie feeder bkr.failure protection relay operated-IIstage (breaker at existing 33kV Switchgear side)56086 FDR-133kV Tie feeder breaker lockout relay operted (breaker at new 33kV Switchgear side)56186 FDR-233kV Tie feeder breaker lockout relay operated (breaker at existing 33kV Switchgear side)56274/86 FDR-133kV Tie feeder breaker Lockout relay supervision relay operated (breaker at new 33kV Switchgear side)56374/86 FDR-233kV Tie feeder breaker Lockout relay supervision relay operated (breaker at existing 33kV Switchgear side)56474 TC-133kV Tie feeder breaker trip coil-1 supervision relay operated (breaker at new 33kV Switchgear side)56574 TC-233kV Tie feeder breaker trip coil-2 supervision relay operarted (breaker at new 33kV Switchgear side)56674 DC-133kV Tie feeder breaker DC supply failure-1 relay operarted (breaker at new 33kV Switchgear side)56774 DC-233kV Tie feeder breaker DC supply failure-2 relay operarted (breaker at new 33kV Switchgear side)56874 TC-133kV Tie feeder breaker trip coil-1 supervision relay operated (breaker at existing 33kV Switchgear side)56974 TC-233kV Tie feeder breaker trip coil-2 supervision relay operarted (breaker at existing 33kV Switchgear side)57074 DC-133kV Tie feeder breaker DC supply failure-1 relay operarted (breaker at existing 33kV Switchgear side)57174 DC-233kV Tie feeder breaker DC supply failure-2 relay operarted (breaker at existing 33kV Switchgear side)57287 B133kV Switchgear Bus Section-1 Busbar protection phase-A operated (87B1)57387 B133kV Switchgear Bus Section-1 Busbar protection phase-B operated (87B1)57487 B133kV Switchgear Bus Section-1 Busbar protection phase-C operated (87B1)57586 B133kV Switchgear Bus Section-1 Busbar protection lockout relay operated57674/8633kV Switchgear Bus Section-1 Busbar protection lockout relay supervision relay operated57795BX33kV SWGR Bus-1 BB protection CT supervision with shorting lockout Relay (95BX) operated57887 B233kV Switchgear Bus Section-2 Busbar protection Phase A operated (87B2)57987 B233kV Switchgear Bus Section-2 Busbar protection Phase B operated (87B2)58087 B233kV Switchgear Bus Section-2 Busbar protection Phase C operated (87B2)58186 B233kV Switchgear Bus Section-2 Busbar protection lockout relay operated58274/8633kV Switchgear Bus Section-2 Busbar protection lockout relay supervision relay operated58395BX33kV SWGR Bus-2 BB protection CT supervision with shorting lockout Relay (95BX) operated58487 CH-133kV Switchgear Bus Section-1 Busbar protection check zone Phase A operated (87CH-1)58587 CH-133kV Switchgear Bus Section-1 Busbar protection check zone Phase B operated (87CH-1)58687 CH-133kV Switchgear Bus Section-1 Busbar protection check zone Phase C operated (87CH-1)58786 CH-133kV Switchgear Bus Section-1 Busbar protection check zone lockout relay operated58874/8633kV Switchgear Bus Section-1 Busbar protection check zone lockout relay supervision relay operated58995BX33kV SWGR Bus-1 BB protection check zone CT supervision with shorting lockout Relay (95BX) operated59087 CH-233kV Switchgear Bus Section-2 Busbar protection check zone Phase A operated (87CH-2)59187 CH-233kV Switchgear Bus Section-2 Busbar protection check zone Phase B operated (87CH-2)59287 CH-233kV Switchgear Bus Section-2 Busbar protection check zone Phase C operated (87CH-2)59386 CH-233kV Switchgear Bus Section-2 Busbar protection check zone lockout relay operated59474/8633kV Switchgear Bus Section-2 Busbar protection check zone lockout relay supervision relay operated59595BX33kV SWGR Bus-2 BB protection check zone CT shorting lockout Relay (95BX) operated5965133kV Bus Section breaker Inverse time over current protection phase-A operated (51)5975133kV Bus Section breaker Inverse time over current protection phase-B operated (51)5985133kV Bus Section breaker Inverse time over current protection phase-C operated (51)59951N33kV Bus Section breaker inverse time Ground fault protection operated60086 A40333kV Bus section breaker Lockout relay operated60174/8633kV Bus section breaker Lockout relay supervision relay operated60274 TC-133kV Bus section breaker Trip coil-1 supervision relay operated.60374 TC-233kV Bus Section breaker trip coil-2 supervision relay operatedT4.16kV Switchgear60487 B14.16kV Switchgear Bus Section-1 Busbar protection Phase-A operated60587 B14.16kV Switchgear Bus Section-1 Busbar protection Phase-B operated60687 B14.16kV Switchgear Bus Section-1 Busbar protection Phase-C operated60787 B24.16kV Switchgear Bus Section-2 Busbar protection Phase-A operated60887 B24.16kV Switchgear Bus Section-2 Busbar protection Phase-B operated60987 B24.16kV Switchgear Bus Section-2 Busbar protection Phase-C operated610514.16kV Bus Section breaker Inverse time over current protection Phase-A operated611514.16kV Bus Section breaker Inverse time over current protection Phase-B operated612514.16kV Bus Section breaker Inverse time over current protection Phase-C operated61351N4.16kV Bus Section breaker Ground fault protection operated61495B14.16kV SWGR Busbar-1 CT supervision relay(95B1) phase-A operated61595B14.16kV SWGR Busbar-1 CT supervision relay(95B1) phase-B operated61695B14.16kV SWGR Busbar-1 CT supervision relay(95B1) phase-C operated61795B24.16kV SWGR Busbar-2 CT supervision relay(95B2) phase-A operated61895B24.16kV SWGR Busbar-2 CT supervision relay(95B2) phase-B operated61995B24.16kV SWGR Busbar-2 CT supervision relay(95B2) phase-C operated62095BX14.16kV SWGR Bus-1 BB protection CT shorting lockout Relay (95BX1) operated62195BX24.16kV SWGR Bus-2 BB protection CT shorting lockout Relay (95BX2) operated62286B14.16 SWGR BB-1 Protection lock relay operated62386B24.16 SWGR BB-2 Protection lock relay operated62474/86B14.16 SWGR BB-1 lock relay coil supervision 74/86B1 operated.62574/86B24.16 SWGR BB-2 lock relay coil supervision 74/86B2 operated.62686 A2084.16kV Bus section breaker Lockout relay operated62774/864.16kV Bus section breaker Lockout supervision relay operated62874 DC-14.16kV Bus section breaker DC supply-1 failure relay operated.62974 DC-24.16kV Bus section breaker DC supply-2 failure relay operated.63074 TC-14.16kV Bus Section breaker trip coil-1 supervision relay operated63174 TC-24.16kV Bus Section breaker trip coil-2 supervision relay operated632274.16 kV SWGR Bus-1 UV trip lockout relay(27/UV) operated633274.16 kV SWGR Bus-2 UV trip lockout relay(27/UV) operated634STMGTG-1 Starting motor protection relay operated63550M/51MGTG-1 starting motor feeder O/C Phase-A operated63650M/51MGTG-1 starting motor feeder O/C Phase-B operated63750M/51MGTG-1 starting motor feeder O/C Phase-C operated63850M/51MGTG-1 starting motor feeder O/C relay faulty63950GGTG-1 starting motor feeder CBCT fault protection operated64086MGTG-1 starting motor feeder breaker lockout relay operated64174 TC-1GTG-1 starting motor feeder breaker trip coil-1supervision relay operated64274 TC-2GTG-1 starting motor feeder breaker trip coil-2 supervision relay operated64374/86GTG-1 starting motor feeder breaker lockout relay supervision relay operated64449-1BGTG-1 starting motor bearing temperature high alarm64549-2BGTG-1 starting motor bearing temperature very high trip64649AGTG-1 starting motor cooler failure647WTI AGTG-1 starting motor winding temperature high alarm648WTI TRIPGTG-1 starting motor winding temperature very high trip649STMGTG-2 Starting motor protection relay operated65050M/51MGTG-2 starting motor feeder O/C Phase-A operated65150M/51MGTG-2 starting motor feeder O/C Phase-B operated65250M/51MGTG-2 starting motor feeder O/C Phase-C operated65350M/51MGTG-2 starting motor feeder O/C relay faulty65450GGTG-2 starting motor feeder CBCT fault protection operated65586MGTG-2 starting motor feeder breaker lockout relay operated65674 TC-1GTG-2 starting motor feeder breaker trip coil-1supervision relay operated65774 TC-2GTG-2 starting motor feeder breaker trip coil-2 supervision relay operated65874/86GTG-2 starting motor feeder breaker lockout relay supervision relay operated65949-1BGTG-2 starting motor bearing temperature high alarm66049-2BGTG-2 starting motor bearing temperature very high trip66149AGTG-2 starting motor cooler failure662WTI AGTG-2 starting motor winding temperature high alarm663WTI TRIPGTG-2 starting motor winding temperature very high trip664STMFuture GTG Starting motor protection relay operated66550M/51MFuture GTG starting motor feeder O/C Phase-A operated66650M/51MFuture GTG starting motor feeder O/C Phase-B operated66750M/51MFuture GTG starting motor feeder O/C Phase-C operated66850M/51MFuture GTG starting motor feeder O/C relay faulty66950GFuture GTG starting motor feeder CBCT fault protection operated67086MFuture GTG starting motor feeder breaker lockout relay operated67174 TC-1Future GTG starting motor feeder breaker trip coil-1supervision relay operated67274 TC-2Future GTG starting motor feeder breaker trip coil-2 supervision relay operated67374/86Future GTG starting motor feeder breaker lockout relay supervision relay operated67449-1BFuture GTG starting motor bearing temperature high alarm67549-2BFuture GTG starting motor bearing temperature very high trip67649AFuture GTG starting motor cooler failure677WTI AFuture GTG starting motor winding temperature high alarm678WTI TRIPFuture GTG starting motor winding temperature very high tripU480V Station Switchgear67951480V Bus Section breaker Inverse time O/C Phase-A operated68051480V Bus Section breaker Inverse time O/C Phase-B operated68151480V Bus Section breaker Inverse time O/C Phase-C operated68251N480V Bus Section breaker Inverse time E/F relay operated68351480V Bus Section breaker Inverse time O/C, E/F Relay faulty68486 A103480V Bus section breaker Lockout relay operated68574/86480V Bus section breaker Lockout relay Supervision relay operated68674 DC480V Bus section breaker DC supply failure relay operated68774 TC480V Bus Section breaker trip circuit supervision relay operated68827480V Bus Section-1 UV trip lockout relay(27/UV) operated68927480V Bus Section-2 UV trip lockout relay(27/UV) operatedV480V Unit Switchgear of Unit-169050/51Unit Switchgear INST./ Inverse Time Over current protection operated69151NUnit Switchgear Ground fault protection operated69286 A201Unit Switchgear Breaker Lockout relay operated69374/86Unit Switchgear Breaker Lockout relay Supervision relay operated69474 DCUnit Switchgear DC Supply Failure relay operated69574 TCUnit switchgear breaker trip circuit supervision relay operatedW480V Unit Switchgear of Unit-269650/51Unit Switchgear INST./ Inverse Time Over current protection operated69751NUnit Switchgear Ground fault protection operated69886 A202Unit Switchgear Breaker Lockout relay operated69974/86Unit Switchgear Breaker Lockout relay Supervision relay operated70074 DCUnit Switchgear DC Supply Failure relay operated70174 TCUnit switchgear breaker trip circuit supervision relay operatedX480V Unit Switchgear of Future Unit70250/51Unit Switchgear INST./ Inverse Time Over current protection operated70351NUnit Switchgear Ground fault protection operated70486 A203Unit Switchgear Breaker Lockout relay operated70574/86Unit Switchgear Breaker Lockout relay Supervision relay operated70674 DCUnit Switchgear DC Supply Failure relay operated70774 TCUnit switchgear breaker trip circuit supervision relay operatedYFuel oil System7081Unloading pump1 Trip7092Unloading pump2 Trip7103Unloading pump3 Trip7114Unloading pump4 Trip7125Unloading pump5 Trip(Future)7136Unloading pump6 Trip(Future)7147Forwarding pump1 Trip7158Forwarding pump2 Trip7169Forwarding pump3 Trip71710Forwarding pump4 Trip71811Level switch High High DFO Tank#1(FOS-10-LSHH-01)71912Level switch High DFO Tank#1(FOS-10-LSH-02)72013Level switch Low DFO Tank#1(FOS-10-LSL-03)72114Level switch Low Low DFO Tank#1(FOS-10-LSLL-04)72215Level switch High High DFO Tank#2(FOS-10-LSHH-05)72316Level switch High DFO Tank#2(FOS-10-LSH-06)72417Level switch Low DFO Tank#2(FOS-10-LSL-07)72518Level switch Low Low DFO Tank#2(FOS-10-LSLL-08)72619Spare72720Spare72821Spare72922SpareZFire Alarm System7301Fire Alarm area-1(Switchgear room)7312Fire Alarm area-2(Battery room)7323Fire Alarm area-3(GT building)733Fire Alarm area-4( Transformer area)7344i) Gen.Transformer 1&2735ii) InterbusTransformer 1736iii) InterbusTransformer 2&37375Fire Alarm area-5(Fuel Tank area)7386Fire Alarm area-6(Control Room)7397SpareAACompressor System7401Compressor-1 Trip7412Compressor-2 Trip7423Compressor-3 Trip7434Spare7445Spare7456SpareABGTG-174659/81G1-1Over Fluxing 1st step - Set 174759/81G1-2Over Fluxing 2nd step - Set 174859/81G2-1Over Fluxing 1st step- Set 274959/81G2-2Over Fluxing 2nd step- Set 275027G1-1Under voltage 1st step - Set 175127G1-2Under voltage 2nd step- Set 175232G-1Reverse power -Set 175332G-2Reverse power- Set 275440G-1Loss of excitation- Set 175540G-2Loss of excitation- Set 275646G1-1Negative phase sequence 1st step- Set 175746G1-2Negative phase sequence 2 nd step- Set 175846G1-1Negative phase sequence 1st step - Set 275946G1-2Negative phase sequence 2 nd step - Set 276049G-1Over load 1st step- Speedtronic76151V2Inverse time Over current -Set276259G2-1Over voltage 1st step - Set 276359G2-2Over voltage 2 nd step- Set 276464F-1Rotor earth fault76574DRRotating diode fault76681 U2-1Under frequency 1st step- Set276781 U2-2Under frequency 2 nd step- Set276881 U2-3Under frequency 3 rd step- Set2Trip When 52L opened76987G1Differential current- Set 177064G1Stator earth fault 95%- Set 177164G2Stator earth fault 100% - Set 277250/27G1Inadvertance energization - Set 177321G2Generator under impedance - Set 277460VTS1Voltage transformer supervision (T43) - Set 177560VTS2Voltage transformer supervision (T44) - Set 277650BF1Unit breaker 52G fault- Set 1ACGTG-277759/81G1-1Over Fluxing 1st step - Set 177859/81G1-2Over Fluxing 2nd step - Set 177959/81G2-1Over Fluxing 1st step- Set 278059/81G2-2Over Fluxing 2nd step- Set 278127G1-1Under voltage 1st step - Set 178227G1-2Under voltage 2nd step- Set 178332G-1Reverse power -Set 178432G-2Reverse power- Set 278540G-1Loss of excitation- Set 178640G-2Loss of excitation- Set 278746G1-1Negative phase sequence 1st step- Set 178846G1-2Negative phase sequence 2 nd step- Set 178946G1-1Negative phase sequence 1st step - Set 279046G1-2Negative phase sequence 2 nd step - Set 279149G-1Over load 1st step- Speedtronic79251V2Inverse time Over current -Set279359G2-1Over voltage 1st step - Set 279459G2-2Over voltage 2 nd step- Set 279564F-1Rotor earth fault79674DRRotating diode fault79781 U2-1Under frequency 1st step- Set279881 U2-2Under frequency 2 nd step- Set279981 U2-3Under frequency 3 rd step- Set2Trip When 52L opened80087G1Differential current- Set 180164G1Stator earth fault 95%- Set 180264G2Stator earth fault 100% - Set 280350/27G1Inadvertance energization - Set 180421G2Generator under impedance - Set 280560VTS1Voltage transformer supervision (T43) - Set 180660VTS2Voltage transformer supervision (T44) - Set 280750BF1Unit breaker 52G fault- Set 1ADFuture GTG80859/81G1-1Over Fluxing 1st step - Set 180959/81G1-2Over Fluxing 2nd step - Set 181059/81G2-1Over Fluxing 1st step- Set 281159/81G2-2Over Fluxing 2nd step- Set 281227G1-1Under voltage 1st step - Set 181327G1-2Under voltage 2nd step- Set 181432G-1Reverse power -Set 181532G-2Reverse power- Set 281640G-1Loss of excitation- Set 181740G-2Loss of excitation- Set 281846G1-1Negative phase sequence 1st step- Set 181946G1-2Negative phase sequence 2 nd step- Set 182046G1-1Negative phase sequence 1st step - Set 282146G1-2Negative phase sequence 2 nd step - Set 282249G-1Over load 1st step- Speedtronic82351V2Inverse time Over current -Set282459G2-1Over voltage 1st step - Set 282559G2-2Over voltage 2 nd step- Set 282664F-1Rotor earth fault82774DRRotating diode fault82881 U2-1Under frequency 1st step- Set282981 U2-2Under frequency 2 nd step- Set283081 U2-3Under frequency 3 rd step- Set2Trip When 52L opened83187G1Differential current- Set 183264G1Stator earth fault 95%- Set 183364G2Stator earth fault 100% - Set 283450/27G1Inadvertance energization - Set 183521G2Generator under impedance - Set 283660VTS1Voltage transformer supervision (T43) - Set 183760VTS2Voltage transformer supervision (T44) - Set 283850BF1Unit breaker 52G fault- Set 1AEGENERATOR SWITCHGEAR(GTG-1)83994GB1Generator breaker alarm (grouped alarm)84094GB2Generator breaker fault (grouped fault)84194LB1Line breaker alarm (grouped alarm)84294LB2Line breaker fault (grouped fault)84352G SF6 FLT52G SF6 alarm84452G SF6 FLT52G SF6 Trip845Breaker Status84674/TC-1CB Trip coil -1 supervision operated84774/TC-2CB Trip coil -2 supervision operated848CB Operating Mechanism failed84950BFBreaker failure relay operated85086BFLock out relay 86BF operated85174/86Lock out relay 86BF supervision relay operatedAFGENERATOR SWITCHGEAR(GTG-2)85294GB1Generator breaker alarm (grouped alarm)85394GB2Generator breaker fault (grouped fault)85494LB1Line breaker alarm (grouped alarm)85594LB2Line breaker fault (grouped fault)85652G SF6 FLT52G SF6 alarm85752G SF6 FLT52G SF6 Trip858Breaker Status85974/TC-1CB Trip coil -1 supervision operated86074/TC-2CB Trip coil -2 supervision operated861CB Operating Mechanism failed86250BFBreaker failure relay operated86386BFLock out relay 86BF operated86474/86Lock out relay 86BF supervision relay operatedAGGENERATOR SWITCHGEAR(Future)86594GB1Generator breaker alarm (grouped alarm)86694GB2Generator breaker fault (grouped fault)86794LB1Line breaker alarm (grouped alarm)86894LB2Line breaker fault (grouped fault)86952G SF6 FLT52G SF6 alarm87052G SF6 FLT52G SF6 Trip871Breaker Status87274/TC-1CB Trip coil -1 supervision operated87374/TC-2CB Trip coil -2 supervision operated874CB Operating Mechanism failed87550BFBreaker failure relay operated87686BFLock out relay 86BF operated87774/86Lock out relay 86BF supervision relay operatedAHEXCITATION-GTG-187826TEX - 1Excitation transformer Over heating 1st step87926TEX - 2Excitation transformer Over heating 2nd step88076G1-1Excitation over current 1st step-Set188176G1-2Excitation over current 2nd step-Set288230TEXMV excitation transformer bleeding fuse fault88374RB-1N1 excitation brige fuse fault88474RB-2N2 excitation brige fuse fault88574RB-1/2N1 & 2 excitation brige fuse fault88694VT- EX1Excitation CB position88794VT- EX2Excitation CB trip88859FExciter OvervoltageAIEXCITATION-GTG-288926TEX - 1Excitation transformer Over heating 1st step89026TEX - 2Excitation transformer Over heating 2nd step89176G1-1Excitation over current 1st step-Set189276G1-2Excitation over current 2nd step-Set289330TEXMV excitation transformer bleeding fuse fault89474RB-1N1 excitation brige fuse fault89574RB-2N2 excitation brige fuse fault89674RB-1/2N1 & 2 excitation brige fuse fault89794VT- EX1Excitation CB position89894VT- EX2Excitation CB trip89959FExciter OvervoltageAJEXCITATION-FutureGTG90026TEX - 1Excitation transformer Over heating 1st step90126TEX - 2Excitation transformer Over heating 2nd step90276G1-1Excitation over current 1st step-Set190376G1-2Excitation over current 2nd step-Set290430TEXMV excitation transformer bleeding fuse fault90574RB-1N1 excitation brige fuse fault90674RB-2N2 excitation brige fuse fault90774RB-1/2N1 & 2 excitation brige fuse fault90894VT- EX1Excitation CB position90994VT- EX2Excitation CB trip91059FExciter OvervoltageAKMISCELLANEOUS-GTG-191194 GPMGeneral watchdog of generator protection module91274GT/52GTGas Turbine fault inducing generator trip91394AVR1Watchdog AVR 1 - Transfer from AVR1 to AVR 2 auto channel91494AVR2Watchog AVR 2 - Transfer from AVR 2 to AVR1 auto channel91594NUMWatchdog AVR 1/2- Transfer from AVR 1/2 to manu channel91694VTM-1Regulation VT, MCB's open - Transfer from AVR1 to AVR2 auto channel91794VTM-2Regulation VT, MCB's open - Transfer from AVR2 to AVR1 auto channel91894VTM-1/2Regulation VT, MCB's open - Transfer from AVR1/2 to manu channel91994VTP1Protection VT, MCB's open92094VTP2Protection VT, MCB's open92194VTCMetering VT, MCB's open92294VTS1/252G Synchro VT, MCB's open92394VTP3Protection VT, MCB's open (64B)92430-F43Voltage transformer F43 fuse bleeding fault92530-F44Voltage transformer F44 fuse bleeding fault92630-F42UAT fuse bleeding fault927NGT alarmNGT Over heating alarm928NGT tripNGT Over heating trip92994UAT-1UAT Circuit breaker position for alarm93094UAT-2UAT Circuit breaker trip93164B1MV Bus duct/Cable earthing detection Set-193294HV33KV protection trip933Power house ventilation system start934Power house ventilation system stop935Power house ventilation system common alarm936unit fuel drain pit level Hi alarm937unit fuel drain pit level Hi Hi alarmALMISCELLANEOUS-GTG-293894 GPMGeneral watchdog of generator protection module93974GT/52GTGas Turbine fault inducing generator trip94094AVR1Watchdog AVR 1 - Transfer from AVR1 to AVR 2 auto channel94194AVR2Watchog AVR 2 - Transfer from AVR 2 to AVR1 auto channel94294NUMWatchdog AVR 1/2- Transfer from AVR 1/2 to manu channel94394VTM-1Regulation VT, MCB's open - Transfer from AVR1 to AVR2 auto channel94494VTM-2Regulation VT, MCB's open - Transfer from AVR2 to AVR1 auto channel94594VTM-1/2Regulation VT, MCB's open - Transfer from AVR1/2 to manu channel94694VTP1Protection VT, MCB's open94794VTP2Protection VT, MCB's open94894VTCMetering VT, MCB's open94994VTS1/252G Synchro VT, MCB's open95094VTP3Protection VT, MCB's open (64B)95130-F43Voltage transformer F43 fuse bleeding fault95230-F44Voltage transformer F44 fuse bleeding fault95330-F42UAT fuse bleeding fault954NGT alarmNGT Over heating alarm955NGT tripNGT Over heating trip95694UAT-1UAT Circuit breaker position for alarm95794UAT-2UAT Circuit breaker trip95864B1MV Bus duct/Cable earthing detection Set-195994HV33KV protection trip960Power house ventilation system start961Power house ventilation system stop962Power house ventilation system common alarm963unit fuel drain pit level Hi alarm964unit fuel drain pit level Hi Hi alarmAMMISCELLANEOUS-Future GTG96594 GPMGeneral watchdog of generator protection module96674GT/52GTGas Turbine fault inducing generator trip96794AVR1Watchdog AVR 1 - Transfer from AVR1 to AVR 2 auto channel96894AVR2Watchog AVR 2 - Transfer from AVR 2 to AVR1 auto channel96994NUMWatchdog AVR 1/2- Transfer from AVR 1/2 to manu channel97094VTM-1Regulation VT, MCB's open - Transfer from AVR1 to AVR2 auto channel97194VTM-2Regulation VT, MCB's open - Transfer from AVR2 to AVR1 auto channel97294VTM-1/2Regulation VT, MCB's open - Transfer from AVR1/2 to manu channel97394VTP1Protection VT, MCB's open97494VTP2Protection VT, MCB's open97594VTCMetering VT, MCB's open97694VTS1/252G Synchro VT, MCB's open97794VTP3Protection VT, MCB's open (64B)97830-F43Voltage transformer F43 fuse bleeding fault97930-F44Voltage transformer F44 fuse bleeding fault98030-F42UAT fuse bleeding fault981NGT alarmNGT Over heating alarm982NGT tripNGT Over heating trip98394UAT-1UAT Circuit breaker position for alarm98494UAT-2UAT Circuit breaker trip98564B1MV Bus duct/Cable earthing detection Set-198694HV33KV protection trip987Power house ventilation system start988Power house ventilation system stop989Power house ventilation system common alarm990unit fuel drain pit level Hi alarm991unit fuel drain pit level Hi Hi alarmNOTE : Minimum 20% spare points shall be provided in each equipment monitored points and Minimum points.