PA30IS Intrinsically Safe PAPR

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PA30IS Intrinsically Safe PAPR

• Intrinsically Safe Tutorial
• September 2006

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Intrinsic Safety The Application

• If an electrical device is intrinsically safe, it
  is designed to be certified by an independent
  approving body, so that if it fails during normal
  use and operation it will not generate enough
  energy to ignite a flammable mixture of the
  hazard classes specified.
• Independent approving bodies include Factory
  Mutual (FM), Underwriters Laboratory (UL),
  Canadian Underwriters Laboratory (cUL), and MSHA
  (Mine Safety and Health Administration)
• References
• NFPA 325 Guide to Fire Hazard Properties of
  Flammable Liquids, Gases and Volatile Solids
• NFPA 497M
• NFPA 70 National Electric Code (NEC)

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Intrinsic Safety Hazardous Locations

• Hazardous locations are places where the
  possibility of fire or explosion exists because
  of flammable gases, vapors, or fine dusts in the
  air. The National Electric Code (NEC) segregates
  hazardous environments into classes, divisions,
  and groups.
• Class I Divisions I II Groups A, B, C, D
• Class II Divisions I II Groups E, F, G
• Class II Divisions I II

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Intrinsic Safety Class I
Ex. Mixing Area of a Flammable Paint Mfg
Ex. Warehouse area of a Flammable Paint Mfg
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Intrinsic Safety Class I Groups

• Hazardous Locations are further defined after
  Class Division by groups of chemicals from the
  most volatile and explosive to the least.

Warning IDLH
Warning IDLH
See next slide
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Intrinsic Safety Class I Div I Group C
Acetaldehyde Epichlorohydrin Allyl Alcohol
Ethylene N-Butyraldehyde Ethylenimine Carbo
n Monoxide Hydrogen sulfide Croton Aldehyde
Morpholine Cyclopropane 2-Nitropropane Dieth
yl Ether Tetrahydrofuran Diethylamine UDHM
(1,10dimthylhyrdrazine) Commonly used in
pharmaceutical processing. Only the Bullard
PA30IS is rated for Class I, Div I, Group C
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Intrinsic Safety Class II
Ex. Inside of grain silo
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Intrinsic Safety Class II Groups

• Hazardous Locations are further defined after
  Class Division by groups of chemicals from the
  most volatile and explosive to the least.

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Intrinsic Safety Class III
Examples Woodworking facilities and textile
mills.
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Bullard PA30IS Intrinsic Safety Design Features

• Factory Mutual (FM) Approved
• Class I Div I Groups C,D
• Class II Div I Groups E, F, G
• Class III Div I
• Blower unit
• Low inductance motor
• Control circuitry monitors and shuts down power
  before flammables can be ignited
• Batteries have triple protection
• Self-resetting circuit breakers opens if current
  is above 1.5 amps
• Fast acting hard fuses blow if current is above
  2.0 amps
• PTC polyfuses blow if current is above 4.3 amps

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For more information Call 1-877-Bullard or
visit www.bullard.com