IEEE C37.121-1989
American National Standard for Switchgear - Unit Substations - Requirements

Standard No.

IEEE C37.121-1989

Published By

Institute of Electrical and Electronics Engineers (IEEE)

Status

Be replaced

Replace By

IEEE C37.121-2012

Latest

IEEE C37.121-2020

IEEE C37.121-1989 history

• 1970 IEEE C37.121-2020 IEEE Guide for Switchgear--Unit Substation--Requirements
• 1970 IEEE C37.121-2012 IEEE Guide for Switchgear - Unit Substation - Requirements
• 1970 IEEE C37.121-1989 American National Standard for Switchgear - Unit Substations - Requirements