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Littelfuse Startco Arc Flash Relay PGR-8800

Littelfuse Startco Arc Flash Relay PGR-8800. Arc Faults: Costly and Dangerous. Dangers Fires Burns Injury Death Costs Collateral damage Equipment replacement Downtime Labour. Arc Flash / Blast Statistics. Over 1000 people die each year from electrical accidents*

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Littelfuse Startco Arc Flash Relay PGR-8800

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  1. Littelfuse StartcoArc Flash RelayPGR-8800

  2. Arc Faults: Costly and Dangerous • Dangers • Fires • Burns • Injury • Death • Costs • Collateral damage • Equipment replacement • Downtime • Labour

  3. Arc Flash / Blast Statistics • Over 1000 people die each year from electrical accidents* • Up to 10 Arc-Flash incidents occur each day in the US • Over 2000 workers are sent to burn centers each year with severe Arc-Flash burns. • OSHA states that 80% of electrically related accidents and fatalities among Qualified Workers are caused by Arc-Flash/Arc-Blast Incidents. * Source: National Safety Council

  4. Case Study – Nov 12, 2009 • Chiller Easton Ice Rink, Columbus, Ohio • An electrician was working on a 480V power panel when the panel sparked and caught fire • The electrician was thrown to the floor and eventually transported to the OSU Burn Center with severe burns on face and hands. • Witnesses reported the panel was still sparking when the fire crews arrived. * Source: Dayton Daily News

  5. Types of Electrical Hazards • Electric Shock - trauma caused by the passage of electric current through the body. • Arc-Flash –an unexpected sudden release of intense heat and light energy produced by electricity traveling through air, usually caused by accidental contact between live conductors. • Arc-Blast - a pressure wave created by heating, melting, vaporization, and expansion of conducting material and surrounding air during an Arc-Flash.

  6. Types of Electrical Hazards Shock Arc-Blast Arc-Flash Fire Gases Light Sound Pressure Wave

  7. Effects of Electrical Hazards on Workers • Severe burns • Vision damage or blindness • Hearing loss • Broken bones or internal organ damage • Whiplash • Brain injuries • Lacerations • Fatality Photos courtesy of OSHA

  8. Effects of Electrical Hazards on Business Costly Damage… • Equipment replacement and need for capital • Equipment repair costs • Downtime • Production Loss (scrap) …and business interruption. Image from IEEE Electrical Safety Workshop, Floyd, Doan, Barrios, Wellman Image from IEEE Electrical Safety Workshop, H. Landis Floyd, II

  9. What Determines Arc-Flash Severity? • System Voltage • Arc Characteristics • Arc gap / Distance from arc • Fault Current • Available fault current • Arc current typically 38% of available fault current • Time • Clearing time Image from OSHA Office of Training & Education

  10. Initiators of these faults • IEEE Std 493-1997 (Gold Book) Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems

  11. Development of an Arc Fault Voltage difference between two conductors (250V) separated by air gap, high resistance Voltage reaches breakdown point, rapid release of energy across gap Shortest distance from bus bar corner to bolt corner Usually phase-to-phase or phase-to-ground Energy limited only by system resistance, air gap impedance

  12. Lifespan of an Arc Fault 1. 4. 2. 5. 3. 6.

  13. Lifespan of an Arc Fault 50 kA bolted fault between 480 Vac and ground

  14. Effects of an Arc FaultPlenty of Hazards to Choose From

  15. Examples of Arc Faults

  16. Arc Flash Relay • PGR-8800 Series • 1ms reaction time • Detects light • Point sensors (A) • Fiber optic sensor (B) • Detect over-currents • Phase CTs (3) • Any CT with 5A sec. • Link upto (4) AF Relays • Larger systems

  17. PGR-8800Functions & Features • Six light sensors • Built-in front sensor • Adjustable light sensitivity • 1000 event logging • Dual inputs for switches or PLC • Fail-safe operation • Local USB interface • No drivers or s/wreq’d

  18. PGR-8800 Wiring Diagram

  19. PGA-LS10 - Point Sensors Circuit Check Signal Supply Coverage Shield 120% Half-Circle 100% • The sensor can be also be mountedto ”see through” the back of the cabinet. 10 m Ø3.5 mm Range is 2 to 2.5 meters 8 mm Sensor Lens Red LED for Circuit-check & Visual Diagnostics 52 mm 360° 360° Mounting Holes (front / back) 32 mm 80% 100% 100% 80% Point Sensor

  20. PGA-LS20 - Fiber-Optic Sensors • 26 ft flexible fiber • 360° detection angle • LED for visual feedback • Built-incircuit check • Electricallyextendable • Plug-inconnector One fiber-optic sensor can replace several point sensors

  21. Multi-Unit Installation Example LINK Switchboard Supply 2 L1 L2 L3 Trip Electrical cables Sensors Detecting Arc Fiber-Optic SensorPoint Sensors System can be expanded with up to four PGR-8800 Modules

  22. PGR-8800 Applications Transformer secondary 3 x 22 kV Transformer primary 3 x 690 V Air-cooled transformers are sensitive to contaminants, affecting the resistance of the air gap between electrical connections (phases, bolted connections etc.)

  23. PGR-8800 Applications

  24. Additional Information • www.startco.ca/arcflash • Datasheet • Product Manual • Brochure Littelfuse Startco: 306-373-5505 Arc Flash RelayBrochure PF136 Datasheet

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