Skip to content
Please enter a keyword to search

  • IEEE C37.121-2012

    View superseded by
    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
    View superseded by

    GUIDE FOR SWITCHGEAR - UNIT SUBSTATION - REQUIREMENTS

    Available format(s):  Hardcopy, PDF

    Superseded date:  26-04-2021

    Language(s):  English

    Published date:  01-01-2012

    Publisher:  Institute of Electrical & Electronics Engineers

    Add To Cart

    Table of Contents - (Show below) - (Hide below)

    1. Overview
    2. Normative references
    3. Definitions
    4. Service conditions
    5. Transformer section
    6. Incoming section
    7. Outgoing section
    8. Ratings
    9. Construction
    10. Typical arrangements
    11. Guide for selection, application, installation and
        maintenance of unit substations
    Annex A (informative) - Bibliography

    Abstract - (Show below) - (Hide below)

    Provides three-phase unit substations for step-down operation in the range of 112.5 kVA or greater at primary voltages of 601 V through 38 kV.

    General Product Information - (Show below) - (Hide below)

    Development Note Supersedes ANSI C37.121. (02/2013)
    Document Type Standard
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS IEC/IEEE 62271-37-013:2015 High-voltage switchgear and controlgear Alternating-current generator circuit-breakers
    14/30257408 DC : 0 BS IEC/IEEE 62271-37-013 ED 1.0 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 37-013: ALTERNATING-CURRENT GENERATOR CIRCUIT-BREAKERS
    UFC 3-550-01 : CHANGE 1 UNIFIED FACILITIES CRITERIA - EXTERIOR ELECTRICAL POWER DISTRIBUTION

    Standards Referencing This Book - (Show below) - (Hide below)

    ANSI C57.12.27 : 1982 LIQUID-FILLED DISTRIBUTION TRANSFORMERS USED IN PAD-MOUNTED INSTALLATIONS INCLUDING UNIT SUBSTATIONS CONFORMANCE STANDARD FOR,
    IEEE C37.91-2008 REDLINE IEEE Guide for Protecting Power Transformers
    IEEE C37.90-2005 IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus
    IEEE C37.20.1-2015 REDLINE IEEE Standard for Metal-Enclosed Low-Voltage (1000 Vac and below, 3200 Vdc and below) Power Circuit Breaker Switchgear
    IEEE 241 : 1990 ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS
    ANSI C37.57 : 1990 SWITCHGEAR - METAL-ENCLOSED INTERRUPTER SWITCHGEAR ASSEMBLIES - CONFORMANCE TESTING
    IEEE C57.12.01-2015 REDLINE IEEE Standard for General Requirements for Dry-Type Distribution and Power Transformers
    ANSI C37.51 : 1989 SWITCHGEAR - METAL-ENCLOSED LOW-VOLTAGE AC POWER - CIRCUIT BREAKER SWITCHGEAR ASSEMBLIES - CONFORMANCE TEST PROCEDURES
    NEMA SG 2 : 1993 HIGH VOLTAGE FUSES
    IEEE C37.20.2-2015 IEEE Standard for Metal-Clad Switchgear
    IEEE C57.12.36-2007 IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers
    NFPA 70B : 2016 RECOMMENDED PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE
    IEEE C57.12.24-2009 IEEE Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 Volts and Below; Low Voltage, 600 Volts and Below
    IEEE C57.93-2007 IEEE Guide for Installation and Maintenance of Liquid-Immersed Power Transformers
    IEEE C57.12.00-2015 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
    IEEE C57.91-2011 REDLINE IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators
    IEEE C57.96-2013 IEEE Guide for Loading Dry-Type Distribution and Power Transformers
    IEEE 4-2013 IEEE Standard for High-Voltage Testing Techniques
    IEEE 315 : 1975 GRAPHIC SYMBOLS FOR ELECTRICAL AND ELECTRONICS DIAGRAMS (INCLUDING REFERENCE DESIGNATION LETTERS)
    ANSI C37.55 : 1989 MEDIUM VOLTAGE METAL-CLAD ASSEMBLIES - CONFORMANCE TEST PROCEDURES
    IEEE C37.20.3-2013 REDLINE IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV)
    IEEE C57.104-2008 IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers
    IEEE C37.010-1999 IEEE Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
    ANSI C57.12.52 : 2012 Sealed Dry-Type Power Transformers, 501 kVA and Higher, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts—General Requirements
    ANSI C84.1 : 2016 ELECTRIC POWER SYSTEMS AND EQUIPMENT - VOLTAGE RATINGS (60 HERTZ)
    IEEE C37.40-2003 IEEE Standard Service Conditions and Definitions for High-Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories
    IEEE 142 : 2007 GROUNDING OF INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    IEEE C57.12.51-2008 IEEE Standard for Ventilated Dry- Type Power Transformers, 501 kVA and Larger, Three-Phase, with High- Voltage 601 V to 34 500 V; Low- Voltage 208Y/120 V to 4160 V- General Requirements
    NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
    IEEE C57.142 : 2010 GUIDE TO DESCRIBE THE OCCURRENCE AND MITIGATION OF SWITCHING TRANSIENTS INDUCED BY TRANSFORMERS, SWITCHING DEVICE, AND SYSTEM INTERACTION
    IEEE C37.24-2003 IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear
    IEEE C57.12.70-2011 IEEE Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers
    IEEE C57.12.40-2011 IEEE Standard for Network, Three-Phase Transformers, 2500 kVA and Smaller; High Voltage, 34 500 GrdY/19 920 and Below; Low Voltage, 600 V and Below; Subway and Vault Types (Liquid Immersed)
    NEMA ICS 2:2008 Controllers, Contactors and Overload Relays Rated 600 V
    IEEE C57.94-1982 IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers
    IEEE C37.23-2003 IEEE Standard for Metal-Enclosed Bus
    IEEE C57.12.50 : 1981 REQUIREMENTS FOR VENTILATED DRY-TYPE DISTRIBUTION TRANSFORMERS, 1 TO 500 KVA, SINGLE-PHASE, AND 15 TO 500 KVA, THREE-PHASE, WITH HIGH-VOLTAGE 601 TO 34500 VOLTS, LOW-VOLTAGE 120 TO 600 VOLTS
    IEEE C57.12.10-2010 REDLINE IEEE Standard Requirements for Liquid-Immersed Power Transformers
    IEEE 141 : 1993 IEEE Recommended Practice for Electric Power Distribution for Industrial Plants
    IEEE C57.106-2006 IEEE Guide for Acceptance and Maintenance of Insulating Oil in Equipment
    ANSI C57.12.57 : 1987 AMERICAN NATIONAL STANDARD FOR TRANSFORMERS - VENTILATED DRY-TYPE NETWORK TRANSFORMERS 2500 KVA AND BELOW, THREE-PHASE, WITH HIGH-VOLTAGE 34500 VOLTS AND BELOW, LOW-VOLTAGE 216Y/125 AND 480Y/227 VOLTS - REQUIREMENTS
    View more information

    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective