Pre-standard
BS DD CLC/TS 50537-4
BS DD CLC/TS 50537-4
Railway applications. Mounted parts of the traction transformer and cooling system. Gas and liquid actuated (Buchholz) relay for liquid immersed transformers and reactors with conservator for rail vehicles
Title (German)
Bahnanwendungen. Anbauteile des Haupttransformators und Kühlsystems. Buchholzrelais für Transformatoren und Drosselspulen