In addition to the general requirements of IEC 60077-2, it gives the rules for circuit-breakers, the main contacts of which are to be connected to d.c. power and/or auxiliary circuits. The nominal voltage of these circuits does not exceed 3 000 V d.c. according to IEC 60850.
WITHDRAWN
IEC 60077-3:2001 ED1
99.60
Withdrawal effective
Oct 25, 2019
PUBLISHED
IEC 60077-3:2019 ED2