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

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Organization: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 22 February 1989
Status: inactive
Page Count: 34
Page(s): 1 - 34
ICS Code (High voltage switchgear and controlgear): 29.130.10
ISBN (Online): 978-0-7381-3619-6
DOI: 10.1109/IEEESTD.1989.95623

Abstracts

Standard

This standard covers the requirements for three-phase unit substations for step-down operation in the range of 112.5 kVA through 10 000 kVA at primary voltages of 601 volts through 38 kilovolts. The standard is intended for use as the basis for the coordination of equipment by assisting in the selection of components. A variety of designs for unit substations are possible using various combinations of incoming sections, transformer sections, outgoing sections, and transition (throat) sections. Since the transformer section determines the kVA and voltage capabilities of a unit substation, the ratings of the various types of unit substations are described in terms of transformer capability.

Document History

C37.121-2012 - IEEE Guide for Switchgear - Unit Substation - Requirements
February 22, 2013 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The basis for the coordination of equipment in unit substations by assisting in the selection of components is intended as the use of this guide. A variety of designs for unit substations are possible using various combinations of incoming sections, transformer sections, outgoing sections, and trans...

C37.121-2012 - IEEE Guide for Switchgear - Unit Substation - Requirements - Redline
February 22, 2013 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The basis for the coordination of equipment in unit substations by assisting in the selection of components is intended as the use of this guide. A variety of designs for unit substations are possible using various combinations of incoming sections, transformer sections, outgoing sections, and trans...

PC37.121/D14, Mar 2012 - IEEE Draft Guide for Switchgear - Unit Substation - Requirements
March 23, 2012 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This Guide for Switchgear-Unit Substation-Requirements is intended for use as the basis for the coordination of equipment in Unit Substations by assisting in the selection of components. A variety of designs for unit substations are possible using various combinations of incoming sections, transform...

C37.121-1989 - American National Standard for Switchgear - Unit Substations - Requirements
February 22, 1989 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This standard covers the requirements for three-phase unit substations for step-down operation in the range of 112.5 kVA through 10 000 kVA at primary voltages of 601 volts through 38 kilovolts. The standard is intended for use as the basis for the coordination of equipment by assisting in the selec...

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