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Applicable Engineering Standards

HPS Enclosures are dessigned in accordance with the following standards:

• CSA 22.2 No. 47 (General Purpose)
• CSA 22.2 No. 94 (Specialty Enclosures)
• NEMA 250
• UL 50 and UL50E

Please ensure to reference all local and national electrical codes and applicable transformer standards before selecting an enclosure for your application.

Definition

Degree of protection: The extent of protection provided by an enclosure against access to hazardous parts, against ingress of foreign solid objects and/or against ingress of water and verified by approved standardized test methods. Hazardous parts: A part that is hazardous to approach or to touch. Indoor Locations: Areas which are protected from exposure to the weather. Non-ventilated: Constructed so as to provide no intentional circulation of external air through the enclosure. Outdoor locations: Locations that are exposed to the weather. Ventilated: Constructed so as to provide for the circulation of external air through the enclosure to remove excess heat, fumes or vapors.

Enclosure Selection

  The selection of the appropriate enclosure is vital for the long term reliability of your HPS product. The "degree of protection" an enclosure actually provides can only be determined by referencing the appropriate test methods outlined in the above mentioned standards.   The list below is just some of the typical enclosure types available for HPS products, their applications, and the environmental conditions they are designed to meet.

HPS Typical Enclosures Types

The following lists some of the standard HPS enclosures available and a brief description of their applications:

TYPE 1

  This is a general purpose ventilated enclosure constructed for indoor use only to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt).

TYPE 2

  This is a general purpose ventilated enclosure constructed for indoor use only to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against the ingress of solid foreign objects (falling dirt); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping or light splashing).

TYPE 3RI

  This is a general purpose ventilated enclosure constructed for indoor use only to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against the ingress of solid foreign objects (falling dirt); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (sprinkler head spray, light splashing of liquids).

TYPE 3R

  This is a general purpose ventilated enclosure constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against the ingress of solid foreign objects (falling dirt); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); and that will be undamaged by the external formation of ice on the enclosure.

TYPE 3RE

This is a general purpose ventilated enclosure constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against the ingress of solid foreign objects (falling dirt and blowing non-conductive dust ); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, windblown snow); and that will be undamaged by the external formation of ice on the enclosure.

TYPE 4

This is a general purpose non-ventilated enclosure constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against the ingress of solid foreign objects (falling dirt and windblown dust); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); and that will be undamaged by the external. (Note: not submersible)

TYPE 4X

This is a general purpose non-ventilated enclosure constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against the ingress of solid foreign objects (windblown dust); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); that provides an additional level of protection against corrosion; and that will be undamaged by the external formation of ice on the enclosure. (Note: not submersible)

TYPE 12

This is a general purpose non-ventilated enclosure constructed (without knockouts) for indoor use only to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against the ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers, and flyings); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing). (Note: not submersible)

IP First Character = The A shaded block in the "A" column represents the first IP character. This indicates that the NEMA Enclosure Type exceeds the requirements for the respective IEC 60529 IP First Character Designation. This IP First Character Designation is the protection against access to hazardous parts and solid foreign objects. IP Second Character = The B shaded block in the "B" column represents the second IP character. This indicates that the NEMA Enclosure Type exceeds the requirements for the respective IEC 60529 IP Second Character Designation. This IP First Character Designation is the protection against the ingress of water. Example: NEMA Type 3R = IP24 Note: Please refer to NEMA standards publication 250-2003 for exact details of the above table.