The range of SR2 enclosures is a complete offer of monobloc enclosures for constructing small and medium-sized electric automation, switching and control switchboards. The SR2 enclosures come from the experience ABB has gained over the years in building IP65 metalstructures (in accordance with the CEI EN 60529 Standard), together with the innovative new production process used for construction and patented by ABB.

The typical use of SR2 Enclosures is to make switchgear and controlgear switchboards for a very wide variety of industrial machines: from large machinery with automated production lines or parts of these, down to the typical installations of on-board machine switchboards, boilers, heating plants and so on.

SR2 enclosures conform to the EN 62208 Standard “Empty enclosures for low voltage protection switchgear and controlgear assemblies” and allow realization of electrical equipment conforming to the prescriptions of the CEI EN 60204-1 Standard “Safety of machinery. Electrical equipment of machines” and of the EN 60439-1 Standard and the new EN61439-1-2 Standard “Low voltage protection switchgear and controlgear for assemblies”. The degree of protection, in accordance with the CEI EN 60529 Standard “Degrees of protection of enclosures (IP Code)”, is IP65. The SR2 enclosures have also passed the control required to obtain the UL (Underwriters Laboratories) and CSA (Canadian Standards Association) Type 12 marks.

The SR2 enclosures also allow secondary distribution switchboards to be made, thanks to the possibility, in the 400, 600 and 800 mm widths, of installing the whole range of apparatus and modular circuit-breakers on DIN rails combined with special pre-drilled and hinged modular front panels, thereby allowing construction of AS/ANS type electrical switchgear conforming to the CEI EN 60439-1 Standard and the new EN 61439-1-2 Standard. A single line of metalwork structures therefore allows construction of automation and secondary and end distribution electrical switchboards thanks to the availability of a series of accessories (modular panels, DIN rails) and to the possibility of stacking the enclosures.

The SR2 enclosures have been designed to fulfil all the typical needs of the builder or installer of switchgear
in the best way possible and the user is presented with a unique ensemble of functional characteristics:

*  Wide dimensional range
*  Certified IP65 degree of protection
*  Internal galvanised sheet mounting plate with 20/10 thickness (made  to allow threaded holes to be made easily), adjustable in depth by using a special accessory.
*  Fairlead plate screwed on (at top and bottom) made of 15/10 thick galvanised sheet, with a sealing gasket applied inside.
*  Complete reversibility of the enclosure, so the door can open either on the right or on the left-hand side.
*  Possibility of installing all the apparatus and modular circuit-breakers on a DIN rail combined with a hinged modular panel.

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Dust and Waterproof to IP 67

*  Two Materials, Polycarbonate – UL 94 V0 Rated or ABS – UL94-HB Rated
*  Threaded knockouts, premoulded areas that can be pushed out for use with M20 size cable glands
*  Plastic lid fixing screws, corrosion resistant
*  Captive lid screws, standard on all lids
*  Available with optional 22mm holes, suitable for standard switches and indicators
*  PCB mounting, mounting posts and slots for PCB as standard
*  Self tapping screw fixing, standard feature
*  Transparent top cover, available in clear and smoke grey

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Bulgin’s new range of IP67 rated plastic enclosures combine a host of practical features to provide a unique package ideal for applications such as control stations and electrical & electronic control equipment where protection from dust and water is necessary.

Complimenting Bulgin’s ranges of sealed connectors the BE enclosure range is available in 3 sizes, all 53mm deep. Size 1 measures 80mm x 72mm, size 2 measures 80mm x 106mm and size 3 measures 80mm x 139mm.

The enclosures combine corrosion resistance and lightweight properties with high impact strength in a choice of two plastic materials; ABS with a UL94-HB rating and Polycarbonate with a UL94-V0 rating. The lids and bases can be supplied in alternative colours; the bases in grey or black and the lids in grey, black, yellow, transparent or smoke grey. Plastic screws complete this corrosion-proof package.

Temperature rating for the ABS version is from –20°C to +85°C and the Polycarbonate material is from –20˚C to +100˚C.

Mounting accessories include an easy to fix, rail mounting bracket for both TS32 and TS35 type DIN rails while external panel fixing brackets allow the enclosures to be easily mounted either within cabinets or in more exposed applications where dust and moisture could prove a problem to system reliability.

Each enclosure includes two moulded knock-outs with M20 thread suitable for use with the matching standard M20 cable glands. These will maintain the IP rating whilst allowing for two separate cable entry points for cables between 3.5 – 7mm in diameter.

Environmental sealing to IP67 provides dust and waterproof protection for short-term submersion to 1m depth.

Internally the enclosures have pre-moulded PCB fixings and slots allowing easy mounting of electronic boards.

The enclosure sizes and depths are specifically designed for use in control stations where 22mm switches and indicators are a standard fit.  The size designations reflect the number of moulded holes available as a standard option for mounting these components.

This combination of features bring together a unique range of benefits to small enclosure applications. The enclosures are suitable for electrical and electronic packaging where harsh environments may exist or where a level of protection needs to be provided for susceptible components in such applications as food preparation/processing areas or wash-down environments through to outdoor installations for connection, switching or packaging.

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