专家解读视频
Applies to electrical measuring relays and protection equipment with a single input energizing quantity, where the operating time is independent or dependent on this quantity. Intended to state the particular requirements for these relays. Does not include thermal relays defined in IEC 60255-8(1990).
NF EN 60255-3:1998 - Identical
DIN EN 60255-3 (1998-07) - Identical
BS EN 60255-3:1998 - Identical
SS EN 60255-3 Ed. 1 (1998) - Identical
UNE EN 60255-3:1998 - Identical
