• IEEE C37.121-1989

IEEE C37.121-1989

  • American National Standard for Switchgear - Unit Substations - Requirements
  • standard by IEEE, 11/30/1988
  • Category: IEEE

$69.00 $35.00

New IEEE Standard - Superseded.This standard covers the requirements for three-phase unit substations for step-down operation in the range of 112.5 kVA through 10 000 kVA at primary voltages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.
PDF

All of our standards document are available in PDF (Portable Document Format), an electronic, downloadable format.You will be able to download the file in your account downloads.

Multi-User Access

After purchasing, you have the ability to assign each license to a specific user.

Printable

At any time, you are permitted to make printed copies for your and your members' reference use.

IEEE 1241-2000

IEEE 1241-2000

IEEE Standard for Terminology and Test Methods for Analog-to-Digital Converters..

$72.00 $144.00

IEEE C37.71-2001

IEEE C37.71-2001

IEEE Standard for Three-Phase Manually Operated Subsurface and Vault Load-Interrupting Switches for ..

$66.00 $132.00

IEEE 802.1w-2001

IEEE 802.1w-2001

IEEE Standard for Information Technology -Telecommunications and Information Exchange Between System..

$89.00 $178.00

IEEE 802.11d-2001

IEEE 802.11d-2001

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requireme..

$38.00 $76.00