SSH EN 50011:1977

Low-voltage switchgear and controlgear for industrial use - Terminal marking, distinctive number and distinctive letter for particular contactor relays

Scope

This standard applies to contactor relays according to IEC Standard 337, having specific relative positions of the contact elements and an associated terminal numbering sequence. These particular contactor relays are designated by a distinctive number followed by a specified distinctive letter. The use of this standard is recommended where terminal marking is a requirement of the relevant standard for contactor relays, or is usual practice