• ANSI C37.121 : 2012

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    AMERICAN NATIONAL STANDARD FOR SWITCHGEAR - UNIT SUBSTATIONS - REQUIREMENTS

    Available format(s):  Hardcopy, PDF

    Superseded date:  22-02-2013

    Language(s):  English

    Published date:  01-01-2012

    Publisher:  Institute of Electrical & Electronics Engineers

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    Abstract - (Show below) - (Hide below)

    Defines the requirements for three-phase unit substations for step-down operation in the range of 112.5 kVA through 1,000 kVA at primary voltages of 601 volts through 38 kilovolts.

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

    Committee IEEE
    Document Type Standard
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By
    Supersedes

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

    CSA C22.3 No. 61936-1 : 2008 POWER INSTALLATIONS EXCEEDING 1 KV A.C. - PART 1: COMMON RULES
    CSA C22.3 No. 61936-1 : 2008 : R2015 POWER INSTALLATIONS EXCEEDING 1 KV A.C. - PART 1: COMMON RULES

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

    IEEE C37.91 : 2008 PROTECTING POWER TRANSFORMERS
    ANSI C57.12.51 : 2008 REQUIREMENTS FOR SEALED DRY-TYPE POWER TRANSFORMERS, 501 KVA AND LARGER, THREE-PHASE, WITH HIGH-VOLTAGE 601 TO 34500 VOLTS, LOW-VOLTAGE 208Y/120 TO 4160 VOLTS
    ANSI C57.12.10 : 2010 TRANSFORMERS - 230 KV AND BELOW 833/958 THROUGH 8333/10 417 KVA, SINGLE-PHASE, AND 750/862 THROUGH 60 000/80 000/100 000 KVA, THREE-PHASE WITHOUT LOAD TAP CHANGING; AND 3750/4687 THROUGH 60 000/80 000/100 000 KVA WITH LOAD TAP CHANGING - SAFETY REQUIREMENT
    IEEE C37.90-2005 RELAYS AND RELAY SYSTEMS ASSOCIATED WITH ELECTRIC POWER APPARATUS
    IEEE C37.20.1:2015 METAL-ENCLOSED LOW-VOLTAGE (1000 VAC AND BELOW, 3200 VDC AND BELOW) POWER CIRCUIT BREAKER SWITCHGEAR
    IEEE C57.12.01 : 2015 GENERAL REQUIREMENTS FOR DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS
    ANSI C57.12.40 : 2011 AMERICAN NATIONAL STANDARD FOR SECONDARY NETWORK TRANSFORMERS - SUBWAY AND VAULT TYPES (LIQUID IMMERSED) - REQUIREMENTS
    ANSI C57.12.24 : 2009 TRANSFORMERS - UNDERGROUND-TYPE THREE-PHASE DISTRIBUTION TRANSFORMERS, 2500 KVA AND SMALLER; HIGH VOLTAGE, 34 500 GRDY/19 920 VOLTS AND BELOW; LOW VOLTAGE, 480 VOLTS AND BELOW - REQUIREMENTS
    IEEE C37.20.2 : 2015 METAL-CLAD SWITCHGEAR
    NFPA 70B : 2016 RECOMMENDED PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE
    IEEE C57.12.00-2015 STANDARD FOR GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS
    IEEE C57.91:2011 GUIDE FOR LOADING MINERAL-OIL-IMMERSED TRANSFORMERS AND STEP-VOLTAGE REGULATORS
    IEEE C57.96 : 2013 GUIDE FOR LOADING DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS
    IEEE 4 : 2013 HIGH-VOLTAGE TESTING TECHNIQUES
    IEEE C37.20.3 : 2013 METAL-ENCLOSED INTERRUPTER SWITCHGEAR (1 KV-38 KV)
    IEEE C57.104 : 2008 INTERPRETATION OF GASES GENERATED IN OIL-IMMERSED TRANSFORMERS
    IEEE C37.010 : 1999 AC HIGH-VOLTAGE CIRCUIT BREAKERS > 1000 VAC 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
    IEEE C37.40 : 2003 STANDARD SERVICE CONDITIONS AND DEFINITIONS FOR HIGH-VOLTAGE FUSES, DISTRIBUTION ENCLOSED SINGLE-POLE SWITCHES, FUSE DISCONNECTING SWITCHES, AND ACCESSORIES
    IEEE C57.92-1981 IEEE Guide for Loading Mineral-Oil-Immersed Power Transformers Up to and Including 100 MVA with 55 C or 65 C Average Winding Rise
    NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
    IEEE C37.24 : 2003 EVALUATING THE EFFECT OF SOLAR RADIATION ON OUTDOOR METAL-ENCLOSED SWITCHGEAR
    IEEE C57.12.70-2011 STANDARD TERMINAL MARKINGS AND CONNECTIONS FOR DISTRIBUTION AND POWER TRANSFORMERS
    IEEE C57.94-1982 RECOMMENDED PRACTICE FOR INSTALLATION, APPLICATION, OPERATION, AND MAINTENANCE OF DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS
    IEEE C57.106 : 2006 ACCEPTANCE AND MAINTENANCE OF INSULATING MINERAL OIL IN ELECTRICAL 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
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