Koffler Electrical Mechanical Apparatus Repair, Inc
527 Whitney St
San Leandro, CA 94577 USA
Phone: 510-567-0630
Fax: 510-567-0636
Email: info@koffler.com
Website: http://www.koffler.com
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Item # 825020.99, Leeson Three Phase Cast Iron Frame Rigid Base Explosion-Proof Motors
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250 HP, 1785 RPM, NEMA Frame 449T, 460 V- Three Phase
- Cast Iron Frame
- Rigid Base
- Division I, Division II, with Conduit Box and Normally Closed Thermostats
- Explosion-Proof Motors are Class I, Groups C & D-Class II, Groups F & G
- All Ratings are Inverter Rated
- These explosion-proof motors are not designed for vertical mounting
- EPACT motors
Explosion-proof For Hazardous Locations
Underwriters Laboratories And Canadian Standards Association Listed
General Specifications:
These explosion-proof motors are designed and approved for application in hazardous environments having certain explosive gases or materials present.
Features: - Rugged mechanical construction meeting all requirements for safety. UL and CSA listed.
- Double shielded, pre-lubricated ball bearings are standard.
- All motors have inherent automatic overload protection.
- NEMA 1.15 service factor except as noted.
Explosion-proof conduit box included at no extra cost. - Normally-closed thermostats are standard on cast iron motors.
- >Division I areas are environments where a hazard is present continuously or would be subject to fire or explosion if the hazard was present as a result of an accident or uncommon occurrence.
- Division II areas are environments where the threat of fire or explosion is not normally present and not likely to result in the event of an abnormal occurrence.
Application Notes:
These motors must be applied in accordance with the National Electrical Code, Article #500. A partial listing of explosive agents is noted below. Consult NFPA Publication 497M for a complete listing. Please note headings and footnotes for qualifications of specific LEESON motors.
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No LEESON motors are listed for Class I, Group A or B.
Class I
Group A: Acetylene
Group B: Butadiene, ethylene oxide, hydrogen, propylene oxide, manufactured gases containing more than 30% hydrogen by volume.
Group C: Acetaldehyde, cyclopropane, diethyl ether, ethylene.
Group D: Acetone, acrylonitrile, ammonia, benzene, butane, ethanol, ethylene dichloride, gasoline, hexane, isoprene, methane (natural gas), methanol, naphtha, propane, propylene, styrene, toluene, vinyl acetate, vinyl chloride, xylene.
Class II
Group E: Aluminum, magnesium and other metal dusts with similar characteristics.
Group F: Carbon black, coke or coal dust.
Group G: Flour, starch or grain dust.
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- Explosion-proof motors are Class I, Group D-Class II, Groups F & G.
- 1.0 Service Factor
- Rugged mechanical construction meeting all requirements for safety. UL and CSA listed.
- Double shielded, pre-lubricated ball bearings are standard.
- All motors have inherent automatic overload protection.
- NEMA1.0 Service Factor except as noted.
- Explosion-proof conduit box included at no extra cost.
- Division I areas are environments where a hazard is present continuously or would be subject to fire or explosion if the hazard was present as a result of an accident or uncommon occurrence.
- Division II areas are environments where the threat of fire or explosion is not normally present and not likely to result in the event of an abnormal occurrence.
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