BS 5067:1985

Foreword
Committees responsible
Specification
1 Scope
2 General
3 Insulation and temperature rise
4 kVA ratings
5 Voltages and connections
6 Frequency
7 Voltage adjustment tappings
8 General design and construction
9 Lifting and anchoring of core
10 Removable covers
11 Wheels
12 Mounting flanges and terminals
13 Provision for cable terminations
14 Over-voltage protection and earthing
15 Marking and rating plates
Appendices
A Information to be supplied by the purchaser with
    enquiry and order
B Earth fault protection
Table
1 Clearance and creepage distances in air
Figures
1 Example of terminal marking plate showing standard
    items of information to be provided and their
    arrangement
2 Mounting flange at lower-voltage end of transformer
3 Mounting flange at higher-voltage end of transformer
    (for voltages not exceeding 6.6 kV)
4 Mounting flange at higher-voltage end of transformer
    (for voltages exceeding 6.6 kV and up to 11 kV)
5 Equipment flange (for voltages not exceeding 6.6 kV)
6 Equipment flange (for voltages exceeding 6.6 kV and
    up to 11 kV)
7 Example of rating plate for flameproof transformer
    showing standard items of information to be
    provided and their arrangement
8 System b type earth fault protection circuit

Covers dry-type flameproof three-phase power transformers up to 11 kV for use underground in mines. States voltages, ratings and connections; mounting flanges and cable terminations; over-voltage protection and earthing.

This British Standard specifies design requirements for dry-type flameproof three-phase power transformers intended for use below ground in mines.

This standard does not apply to transformers of the types covered by BS 2538¹⁾ and BS 5126-4.

Appendix A lists information to be supplied by the purchaser with the enquiry and order.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.