SDDG series0 pages

T e c h n i c a l

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D a t a

S h e e t

ATEX ‘Zone 22’ Sw Disconnectors 25A - 63A

R6

How safe is your workspace?
From July 2006 the onus was placed upon companies
to ensure that all equipment within their organisations
is suitable for the environment in which it is being used.
This was aimed particularly at areas where there may
be a possibility of a combustible atmosphere being present, even for short periods i.e. less than 10 hours/year.

Typical industries where such atmospheres may be generated:-

People normally think of such atmospheres as being
gases, mists or vapours, however there are various
industries where a conductive or non-conductive dust
mixed with air in the right proportion can become explosive. It is these areas where the Craig & Derricott ATEX
Group II (Zone 22) equipment can be used to help you
comply with Health & Safety regulations.

• Grain Millsttt

• Powder Coating Plant

• Textilesttt

• Chemicals

• Cargo Handlingtt

• Woodworking

• Pharmaceuticalstt

• Waste Processing

There are different degrees of protection against explosive dusts, and
Zone 22 is defined as:“A place in which an explosive atmosphere, in the form of a cloud of
combustible dust in air, is not likely to occur in normal operation but,
if it does occur, will persist for a short period only.

Applicable Regulations/Specifications
• Directive 94/9/ECt
(“Manufacturers Directive”) Sets out the route equipment manufacturers must take to get their
t
products certified for use in hazardous environments.
• Directive 1999/92/ECt
(“Users Directive”) Defines the classifications for protection zones, and the approach
t
users must take to ensure that the correct equipment is matched to specific hazardous ttt
tenvironments.
Both of the above are classed as ‘ATEX’ directives and are concerned solely with ensuring safety in the workplace.
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DSEARt
BS EN 60079-0t
BS EN 60079-31t
BS EN 61241-0t
BS EN 61241-1t
BS EN 60529t
BS EN 60947-3t
BS EN 60204-1t

Dangerous Substances and Explosive Atmospheres Regulations 2002.
Explosive atmospheres - Part 0: Equipment - General requirements.
Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure “t”.
Electrical apparatus for use in the presence of combustible dust - General requirements.
Electrical apparatus for use in the presence of combustible dust - Protection by enclosures ‘tD’.
Specification for degrees of protection provided by enclosures. (IP code)
Specification for low-voltage switchgear and control gear.
Safety of machinery. Electrical equipment of machines - General requirements.

ATEX Switch Disconnectors 25A - 63A

Craig & Derricott has been manufacturing enclosed switchgear for
more than 50 years. We have incorporated all of that experience in
producing an outstanding product that has now been approved for
use in explosive dust atmospheres.
Using high quality die cast aluminium and hinged lid sheet steel
enclosures the range covers 20A - 63A ratings

Catalogue Numbers
Rating

Cat. No.

20A

6P+2 EB Aux

SDDG256EBZ22

Enclosure
Size (p3)
A

25A

Size A

Format
3P+2 EB Aux

SDDG253EBZ22

A

6P+2 EB Aux
3P+2 EB Aux
6P+2 EB Aux
3P+2 EB Aux
3P+2 EB Aux

SDDG326EBZ22
SDDG323EBZ22
SDDG406EBZ22
SDDG403EBZ22
SDDG633EBZ22

B
A
B
B
B

3P+2 EB Aux
6P+2 EB Aux

SDMG633EBZ22
SDMG636EBZ22

C
D

32A

Size B

Moulded Padlocking
Handle & Base mounted interiors

40A
63A

Sizes C&D

Hinged lid
sheet steel enclosure:Base mounted interior (63A)

63A
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www.craigandderricott.com

Craig & Derricott Ltd

Hall Lane, Walsall Wood,
Walsall, West Midlands WS9 9DP
t: +44(0)1543 375541 f: +44(0)1543 361619
e: sales@craigandderricott.com