Presentation on theme: "Arc Flash & Data Centers"— Presentation transcript:
1 Arc Flash & Data Centers Talking Points:Arc Flash is a concernDiscussed at SympossiomHoping to help calm nerves while stressing importanceMarch 2015Matt Phillips , VP of Business DevelopmentFrank Jenkins, Sr. Electrical Engineer
2 What are we discussing today? AgendaWhat are we discussing today?Arc FlashWhat is it?Why it is important?Who is responsible?How does it affect work?Where is it headed?How do we react?Key takeawaysTalking Points:
3 “Serious harm to people” Definition“Serious harm to people”An arc flash is an undesired electric discharge that travels through the air between conductors or from a conductor to a ground. The resulting explosion can cause fires and serious harm to equipment and people.Talking points:Simple definition – How it occurs is beyond the scope of this presentationCurrently there are over 1,400 workplace injuries every month caused by Arc Flash, many of those injuries being debilitating (NSC). In 2013, there were 139 deaths in the work place caused by electrical injuries, primarily Arc Flash and electrocution (OSHA)
4 Why is Arc Flash a big topic Code, Regulations, and LawyersNFPA 7NFPA 70E 2015 Standard for Electrical Safety Requirements for Employee WorkplacesOSHA Standards 29-CFR, Part 1910 Sub part S (electrical) Standard numberNEC 2002 Article NFPA 70B 2002 Recommended Practice for Electrical Equipment Maintenance.Talking Points:Those sobering numbers are better than they were a decade ago. However, in its ongoing effort to improve safety in the workplace, OSHA is continuing its pressure to enforce regulations regarding worker standards around electrical gear. One of the most discussed electrical standards, NFPA 70E, ‘Standard for Electrical Safety in the Workplace’, was developed in response to OSHA’s requests. One of NFPA 70E’s addressed hazards, Arc Flash, is forcing significant changes in how electrical systems have historically been handled. Hot work (making modifications to gear when it is energized) is becoming much less common and tightly regulated.The rules have been in code for a while – the enforcement is starting to be stressedThere are almost as many lawyers as engineers at Arc Flash Training Seminars
5 Arc Flash and Data Centers Is de-energized work really just an inconvenienceAt many data centers, ‘live work’ occurs because the facility feels it is unfeasible to de-energize the equipment — the facility simply believes they cannot shut it down. However, most of the time it is more of an inconvenience, and OSHA will not allow live work to occur just because it's inconvenient to de-energize it. We tend to see that data centers try and justify live work; however, OSHA will not agree with them.Talking Points:The rules have been in code for a while – the enforcement is starting to be stressedOSHA, 80% of electrically related accidents and fatalities involving “Qualified Workers” are caused by arc flash / arc blast.Between 2007 and 2011, more than 2,880 fines were assessed for not meeting OSHA regulation (d) which averages out to 1.5 fines a day.We have always done it that way will not be an adequate excuse or reasonConcurrently Maintainable Systems will need to be maintained per the design – if you have dual bus you will need to shut down items to work on systems
6 Safety Rules Level 1 = 4 cal/cm2 Level 2 = 8 cal/cm2 PPE Category level 2015Level 1 = 4 cal/cm2Level 2 = 8 cal/cm2Level 3 = 25 cal/cm2Level 4 = 40 cal/cm2Above Level 4 = No energized workTalking PointsIn all cases Arc Flash rated clothing is a must the level defines the cal/cm ratingSafety Glass & Face shields required at a minimum – Hoods become mandatory at level 3Hardhats always requiredMinimum of leather gloves with rubber arc rate gloves required at level 3Space suits begin at level 2 – and get more restrictive as level go up.As levels increase the ability of electricians to do work gets more difficult, takes more time, and more specialized workers required
7 Energized Work When can we work hot When Powering down equipment becomes an increased hazard: i.e. A Medical facility may require uninterrupted electricity for life support systemsWhen it is simply infeasible to power down; i.e. taking voltage readings, IR Scans, and troubleshooting live components.Note: OSHA recognizes and allows this without EEWP. However, PPE is required and no physical work can be performed without 1st employing an EEWPTalking Points:OSHA has a few exceptions when Hot Work is permitted and acceptable
8 Energized Electrical Work Permit OSHA Approved -Talking Points:Hot work (making modifications to gear when it is energized) is becoming much less common and tightly regulatedAll Parties including owner will share liability if event occursWho is liable?
9 Future of Arc Flash Rules are already in place Coming SoonRules are already in placeEnforcement is coming soon!PPE is mandatoryEnergized work will be nearly impossibleNFPA 70E make business owners to share liabilityEnergized Electrical Work PermitsTalking Points:One accident, one class for inspectors, or one near miss and you can bet we won’t be allowed to continue the way we have been.We need to prepare now – so we are not in a panic when the changes completely take affect.
10 How do we react? Now and for future Focus on Arc Flash during designs Arc resistant SWGRRemote racking controlsWork arounds for de-energized maintenance and additionsRemote Distribution Panels vs. Standard PDUsTalking Points:Some things to consider when building new are to Focus on Arc Flash rules as part of design
11 Study is highly recommended! Existing FacilitiesRequirementsThe NFPA 70E Edition – Standards for ElectricalMinimum requirement – Factory Labels MandatoryFull study if any remodels2012 & 2015 Edition further clarified and mandated compliance.OSHA RequirementsSafety of workersStudy is highly recommended!Talking Points:Most of us here are not building new – so how does arc flash effect existing facilitiesIndirect requirement of OSHA - even if no remodelsCode requires update every 5 years
12 What to expect from a study How do I get this doneBreaker & switch operations changesCost for future work may increaseTrained personnelNew Safety & PPE StandardsPPE PurchasedMaintenance and installations become more challengingDe-energized work may become mandatoryCosts to mitigate above Level 4No longer operate breakers – Alliance Generator TestEC vs Facility People – schedulingTraining of staff & purchase of PPECan no longer do it the way we always haveDe-energized workThere are ways to mitigate –
13 “Learning to trust concurrently maintainable” De-energized workAre you for realKnow your Tier LevelTier I - Single path of powerTier II - Single path of power - Redundant componentsTier III - Multiple power and cooling distribution paths, only one path active, redundant components, concurrently maintainableTier IV – Multiple active power and cooling distribution paths, redundant components, concurrently maintainable, fault tolerant“Learning to trust concurrently maintainable”Do you know if you can turn off a breaker?Do you trust your redundancy?
14 Learning to trust concurrently maintainable Dual Bus Testing1st time – common issuesHow things are plugged-inBoth on same busCircuit overloadsIn rack PDU overloadsServer IssuesPower SuppliesManual reset vs. autoDifficulty getting it approvedExpected BenefitsImproved ConfidenceImproved Change ControlSafer work environments for maintenanceOpportunity to operate / exercise standby equipmentHardware validationPeace of MindDual Bus Test ResultsOur Experience 2% Server failure 1st time – 1/2 % Server Failure 2nd Time and trending toward zero subsequent testsExpected BenefitsAlways better to find problems during a planned event than in a real emergency
15 Key Takeaways Save Lives & Injuries Action Steps Improving safety Complete an Arc Flash StudyEmploy Mitigation StrategiesReview & Update Safety StandardsTrain personnelNew PPE StandardsUnderstand and trust your“Concurrent Maintainability”Save Lives & InjuriesNo longer operate breakers – Alliance Generator TestEC vs Facility People – schedulingTraining of staff & purchase of PPECan no longer do it the way we always haveDe-energized workThere are ways to mitigate –
16 Questions? Thank you Matt Phillips Frank Jenkins Vice President of Business Development, Secretary/TreasurerFrank JenkinsSenior Electrical Engineer