1 / 29

FM Global

FM Global. Switchgear and Circuit Breakers Failures and Case Studies. UE Systems 2015 Reliable Asset Conference June 4 th Dan Crawford, Group Manager Field Engineering, FM Global. FM Global. 180 years of expertise. Mutuality Single focus – commercial property. FM Global.

kylar
Download Presentation

FM Global

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FMGlobal Switchgear andCircuit Breakers Failures and CaseStudies UE Systems 2015 Reliable Asset Conference June4th Dan Crawford, Group Manager Field Engineering, FMGlobal

  2. FMGlobal 180 years ofexpertise Mutuality Singlefocus – commercial property

  3. FMGlobal FMGlobal-Engineering • ~1,800 engineers • 148countries • Loss PreventionSolutions • Consistent • Practical and costeffective • Scientificproven

  4. FMGlobal Switchgear and Circuit BreakerFailure What canhappen? Switchgear/circuit breakers fail to operate with severe consequences

  5. FMGlobal What can happen- Switchgear and Circuit BreakerFailure

  6. FMGlobal What can happen- Switchgear and Circuit BreakerFailure

  7. FMGlobal What can happen – worstcase Switchgear and Circuit BreakerFailure

  8. FMGlobal Switchgear and Circuit BreakerFailure • Beyond the loss of the CBs andSwitchgear • Ignitionsource • Catastrophic failure of controlledequipment • BusinessInterruption

  9. FMGlobal Switchgear and Circuit BreakerFailure FMexperience

  10. FMGlobal VeryHigh RiskFactors F R E Q U E N C Y • Environment • Operating conditions • Age/history • Maintenance • Operatortraining Very Severe Low SEVERITY Operator training, contingency plan, safetydevice

  11. FMGlobal Contingency Plan – What to askyourself. • Is a needed spare on hand and ready to install • Criticalequipment • Long leadtime • Obsolete • Is re-configuring the electrical systempossible • Is redundant equipmentinstalled • double-endedsubstation • Has an alternative supply beenidentified • Rental diesel engine-driven generatorunits

  12. SafetyDevice FMGlobal

  13. FMGlobal • Electrical protection - a system of manycomponents • Instrument • Relay • Controlwire • Trip coil • Battery • Etc. Preventive MaintenanceProgram

  14. Preventive Maintenance ProgramExamples FMGlobal

  15. FMGlobal Preventive Maintenance ProgramExamples 2.1.3.4.2 Perform a capacity test ( also called performance test or discharge test) every 5 years for flooded lead acid and flooded Ni-Cd batteries, and every 2 years for sealed lead acid (VRLA)batteries. Sources: DS 5-19: Switchgear and Circuit Breakers DS 5-20: ElectricalTesting

  16. FMGlobal Case Study#1 • Site Information • A simple manufacturingfacility • 24/7 operation • Utility power is the single electric poweresource

  17. Case Study#1 Utility line 69kV FMGlobal 12kV 480V

  18. FMGlobal Case Study#1 • DamageInvestigation • Explosion & fire involving • 480Vcabinets • Tank rupture of the mineral oil-filled 12 kV/480V transformer • Minimum business interruption: contingency plan inplace

  19. FMGlobal • Damageinvestigation • Key contributing factor: Lack of adequatemaintenance • 12 kV switchgear’s battery -discharged • 480 V circuit breaker:seized • 12 kV fuse for transformer had a knownproblem Case Study#1

  20. FMGlobal • Conclusion • Overall maintenance program needs improvement • Contingency plan minimized theBI • No fire following: no combustible load in the electricalroom Case Study#1

  21. FMGlobal Case Study#2 • Site Information • A simple manufacturingfacility • 24/7 operation • Utility power is the single electric powersource

  22. FMGlobal Case Study#2 • Site Electricalsystem: • Utility power: 69kV • 480Vfeeder • Solid groundedsystem • Fused switch with ground faultprotection • >100 ft. bus bar above the productionarea • 40 yearsold

  23. FMGlobal Case Study#2 • ElectricalPM • Annual IRscan • Annual transformer oil sample – screen &DGA • 3 year switchgearPM

  24. FMGlobal Case Study#2 • Theincident • Bus bar failed (close to the plug-in) • Auminum bus & enclosure steel frame vaporized • Suspended ceiling above blewoff • Hot particles from the bus duct explosion ignited the combustible material above the ceiling and a firefollowed

  25. FMGlobal

  26. FMGlobal Case Study#2 • Damageinvestigation • Ground fault protection did notoperate • Fuses of two phasesmelted • Entire busdamaged • Significant smoke/water damage to foodproduct • 100% productionshutdown

  27. FMGlobal Case Study#2 • Damageinvestigation • GFP • Unknown setting ofGFP • No electrical study to identifysetting • No recorded testing/maintenance • The 480 V busbar • No documented maintenanceactivities

  28. FMGlobal Case Study#2 • Conclusion • Coordination study needed forGFP • Test GFP during 3 yearPM • Improve busPM • Fire relatedissues • Automatic sprinklerinstallation • FD pre incidentplanning

  29. FMGlobal Questions

More Related