BS 5126-3:1993

Committees responsible
Foreword
Specification
1 Scope
2 References
3 Definitions
4 Information and requirements to be agreed and to be
   documented
5 Service conditions
6 Rated values
7 Design and construction
8 Verification and tests
9 Marking
Tables
1 Creepage distance and clearance
Figures
1 Outline of enclosures showing arrangements for
   earthing terminals and skid couplings
2 Busbar chamber end flange
3 Busbar interconnecting trunk with cover plate
4 650/1100 V busbar interconnecting adaptor trunk
5 650/1100 V skid coupling plate
6 End cover for busbar chamber
7 Envelope dimensions for padlocks
List of references

Specifies service conditions, rated values, design and construction, verification and testing.

This Part of BS 5126 specifies requirements for flameproof supply and control units designed primarily for use in the coal mining industry on 1 100 V three-phase a.c. circuits containing single-phase transformers intended for supplying lighting and other circuits.

In addition to the definitive requirements, this standard also requires the items detailed in clause 4 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied.

NOTE 1 To facilitate cross-reference and subject location recall between the Parts of this standard, a uniformity of clause arrangements is maintained. At subclause level, because of the different purposes and individual technical features of the four types of control unit, some differences in title and/or subclause arrangements have been unavoidable, but have been made without disturbing the general pattern. Thus, in this Part, subclauses 7.11 and 7.14 remain unused.

NOTE 2 The figures in this standard show only such features and dimensions essential for function and interchangeability. Dimensions are in millimetres. Untoleranced values less than 100 mm are ± 0.15 mm and those greater than 100 mm are ± 0.25 mm.