Arc Flash Overview Presentation

Arc Flash Hazard Awareness

Developed By

Arc Flash Awareness Team

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Outline

Introduction to Arc Flash Hazards

New Arc Flash Safety GI 2.721

Arc Flash Mitigation Program

Implementation Schedule

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Outline





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• Arc Flash Video

Introduction to Arc Flash

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• Possible Hazards


Electric shock

Severe burns Blindness Blast

injuries

Flying debris

Lung blast injuries

Ruptured eardrum

Pressure wave

injuries

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• Arc Flash Statistics


U.S.AAnnually: 4500 Injuries & 365 Deaths

Daily: 12 Injuries & 1 Fatality

25 Years: 59 Injuries & 5 Fatalities

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Outline





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Comprehensive Hazard Mitigation Program Applies

Engineering Controls

Administrative Controls PPE Controls

• Arc Flash Hazard Controls


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Solutions

1. Remote Racking2. Remote Switching

3. Smart MCC 4. Arc Resistance Switchgear

5. High Speed Grounding6. Arc Detection Scheme


• Engineering Controls


• Administrative Controls

Establish Corporate Training and Certification Program

• Arc flash hazards and warning signs• Learning safe work procedures for isolation, testing, etc.• Proper arc flash PPE selection, inspection, & use

Implement Uniform Operations & Maintenance Procedures

• Written switching programs • Written requests for outage/clearance procedures• Requirements for use of Safety Stand-by Personnel

Establish Clear/Consistent Delineation of O&M Responsibilities

• Proponents• Electrical support organizations• Third parties 10

Arc Flash Task Warning Signs

• Mounted on electrical equipment rated > 240V• Switchgear, switchboards, panelboards, MCCs• On new equipment & by Dec. 2010 on existing equip.

As per Table 2.1 of the GI, shall show:

• Required Applicable tasks• Arc flash Hazard/Risk Category (HRC)• Required protective equipment


• Administrative Controls

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Tasks Performed on Energized EquipmentHazard /

Risk Category

Rubber Insulating

Gloves

Insulated & Insulating

Hand Tools

Panelboards or Switchboards Rated > 240 V and up to 600 V

Work on energized electrical conductors and circuit parts, including voltage testing 2* Yes Yes

600 V Class: Switchgear, Motor Control Centers (MCCs), Other Equipment

Work on energized electrical conductors and circuit parts, including voltage testing 2* Yes YesWork on control circuits >120 V with exposed energized parts 2* Yes YesApplication of safety grounds, after voltage testing 2* Yes NoInsertion or removal (racking) of circuit breakers or individual starter “buckets” 4 Yes NoRemoval of bolted covers to expose bare, energized parts 4 No No

NEMA E2 (fused contactor) Motor Starters, Rated 2.3 kV through 7.2 kV

Perform infrared thermography or non-contact inspection not closer than 0.8m (2.5ft) 3 No NoOpening hinged covers to expose bare, energized electrical parts 3 No NoWork on control circuits >120 V with exposed energized parts 3 Yes YesApplication of safety grounds, after voltage testing 3 Yes No

Work on energized electrical conductors and circuit parts, including voltage testing 4 Yes Yes

Insertion or removal (racking) of starters from cubicles 4 No NoRemoval of bolted covers to expose bare, energized parts 4 No No


• Hazardous Tasks Table 2.1


•Personal Protective Equipment

Flame Resistant Clothing (FRC) protects a worker from receiving severe burns if exposed to a flame/flash

Self-extinguishing when the source of the flame is removed

Must be worn to limit the incident energy level of the arc flash to 1.2 cal/cm² against the worker’s chest

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Personal Protective Equipment (PPE)

• Video Demo Non-FRC

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Personal Protective Equipment (PPE)

• Video Demo FRC

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Incident Energy Exposure

Hazard / Risk Category

(HRC)

4 cal/cm2 1

8 cal/cm2 2

25 cal/cm2 3

40 cal/cm2 4

Tasks with Arc Flash Hazard (Table 2.1)

Select Proper PPE (FRC, face, head, etc.)

Category 3 Category 4Category 2*Category 2Category 1


• Flame Resistant Clothing (FRC)

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Regular NOMEX® FRC


• Flame Resistant Clothing (FRC)

Electrical Workers’ Everyday Work Clothing and PPE Shall Be Category 2 (8 cal/cm2)

- Workweek’s supply of Category 2 FRC

-Arc-rated face shield, hardhat, etc.

Arc Flash Suit Shall Be Worn If:

- Performing any of the tasks listed in GI Table 2.1

-Working within Arc Flash Protection Boundary

Proponents to provide Category 3 or Category 4 Arc Flash Suits at electrical equipment installations- When need more protection than everyday work clothing

(Category 2)

Outline





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Team#1 Technology

Objective Statement

Evaluate and deploy viable technologies to mitigate arc flash hazards at existing and future installations

Team#2 Training & Certification

Objective Statement

Develop certification and recertification requirements for Saudi Aramco and contractor electrical workers

Team#3 Operation & Maintenance Procedures

Objective Statement

Ensure uniform Saudi Aramco switching and maintenance procedures for all facilities, which are in accordance with international standards and embedded in each plant’s OIM

Team#4 Operation & Maintenance Delineation

Objective Statement

Establish clear and consistent delineation of electrical system O&M responsibilities to maximize safety, reliability and optimize cost

Team#5 Awareness

Objective Statement

Publicize the dangers of arc flashes and the precautions necessary to avoid them

Corporate Arc Flash Mitigation Program

• Five Teams

Outline





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• What needs to be done next?

By December 2010:

• Post task warning signs (Table 2.1)• Workweek of everyday work clothing (Cat. 2)• Arc flash suits at elec. installations• Company-wide training and certification • Uniform O&M procedures • Clear delineation of O&M responsibilities

Implement Technology

• Remote racking and switching

Thank YouQ & A

Documents

Arc Flash Overview Presentation