Hazardous Location Transformer
Product Overview & Application
“Hazardous Locations and Harsh Industrial Environments” typically refers to areas which may contain dangerous and corrosive, explosive or combustible gasses, liquids, or dusts. Typical applications include the mining, petrochemical, and pulp and paper industries. Rex Power Magnetics has been designing and producing a line of dry type transformers for Hazardous Locations and Harsh Industrial Environments. Rex’s product offering in this category includes three varieties, known as the HLA, HLB & HLC product lines, which are CSA and UL approved for CLASS I, DIVISION 2, GROUPS A, B, C, & D.
- Group A: Atmospheres containing acetylene;
- Group B: Atmospheres containing butadiene, ethylene oxide, hydrogen (or gases of vapours equivalent in hazard to hydrogen, such as manufactured gas) or propylene oxide
- Group C: Atmospheres containing acetaldehyde, cyclopropane, diethyl ether, ethylene, hydrogen sulphide, or unsymmetrical dimethyl hydrazine (UDHM), or other gases or vapours of equivalent hazard
- Group D: Atmospheres containing acetone, acrylonitrile, alcohol, ammonia, benzene, benzol, butane, ethylene, dichloride, gasoline, hexane, isoprene, lacquer solvent vapours, naphtha, natural gas, propane, propylene, styrene, vinyl acetate, vinyl chloride, xylenes, or other gases or vapours of equivalent hazard
*NEW* A variant of Rex’s HLA & HLB transformers is available with IECEx approved CLASS 1 Zone 2 certification. Please contact our sales office for more information on IECEx approved transformers CLASS I, ZONE 2, GROUPS IIA, IIB, IIC
- Group II A: Atmospheres containing acetaldehyde, acetone, cyclopropane, alcohol, ammonia, benzene, benzol, butane, ethylene, dichloride, gasoline, hexane, isoprene, lacquer solvent vapours
- Group II B: Atmospheres containing acrylonitrile, butadiene, diethyl ether, ethylene, ethylene oxide, hydrogen sulphide, propylene oxide, or unsymmetrical dimethyl hydrazine (UDHM), or other gases or vapours of equivalent hazard
- Group II C: Atmospheres containing acetylene, carbon disulphide, or hydrogen or other gases or vapours of equivalent hazard
Product Specification
FEATURES | TPYE HLA | TYPE HLB | TYPE HLC |
Construction Features |
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Insulation Class | 200C | 200C | 220C |
Temperature Rise | 80C or 115C | 80C or 115C | 80C, 115C or 150C |
Temperature Code | T3C or T3 | T3C or T3 | T3C, T3, or T2C |
Enclosure |
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Certification | CSA & UL approved for Class 1, Division2 | CSA & UL approved for Class 1, Division2 | CSA & UL approved for Class 1, Division2 |
Application | Windings are encapsulated in epoxy, preventing airborne contaminants from reaching the coils, and ths preventing damate to electrical insualtion. | As with HLA, the windings are encapsulated. Additionaly, teh connection between the leads and the coils are encapsualted. Wiring to the rest of the system is done at the leads. | Conventional construction: non-encapsualted, vented design. Designed to conform to specified temperature code. |