BS 5126-3:1993

This standard BS 5126-3:1993 Mining type flameproof supply and control units for use on systems up to 1100 V is classified in these ICS categories:

• 29.260.20 Electrical apparatus for explosive atmospheres

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.

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