HD 472 S1:1989
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Nominal voltages for low-voltage public electricity supply systems
01-12-1989
09-01-1989
Applies to: a.c. transmission, distribution and utilization systems and equipment with standard frequencies 50 Hz and 60 Hz and a nominal voltage above 100 V; a.c. and d.c. traction systems; a.c. and d.c. equipment with nominal voltages below 120 V a.c. or below 750 V d.c.
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.