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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 — IECEx CSA 13.0011X

  • 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
  • ANC design
  • Encapsulated Transformer
  • Bottom/Front Access (based on kVA)
  • Conduit K/O on sides
  • nameplate marking
  • ANC design
  • Encapsulated Transformer
  • Bottom/Front Access (based on kVA)
  • Conduit K/O on sides
  • nameplate marking
  • ANC design
  • Ventilated Transformer
  • Bottom/Front Access (based on kVA)
  • Conduit O/O on sides
Insulation Class  180C  185C  220C
Temperature Rise  115C Maximum  115C Maximum  80C, 115C or 150C
Temperature Code  T3  T3  T3C, T3, or T2C
Enclosure
  • ASA #61 Grey
  • Type 3R outdoor
  • ASA #61 Grey
  • Type 3R outdoor
  • ASA #61 Grey
  • Type 3R outdoor
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.

Documentation