BS 171:1970
Specification for power transformers
https://doi.org/10.3403/00013998 (published 31/03/1970)
BS 171:1970 is maintained by PEL/14. This standard is available from the following sources:
Other historical versions of this standard document also exist:
- BS 171:1936 [current until 31/03/1959]
- BS 171:1927 [current until 20/07/1936]