BS 1538:1949

Specification. Intrinsically-safe transformers primarily for bell-signalling circuits.

NORMA vydaná dňa 9.2.1949

The information about the standard:

Designation standards: BS 1538:1949
Note: NEPLATNÁ
Publication date standards: 9.2.1949
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategória: Technické normy BS