• IEEE DRAFT C37.20.4 : 2001

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    DRAFT STANDARD FOR INDOOR AC SWITCHES RATED ABOVE 1KV THROUGH 38KV FOR USE IN METAL-ENCLOSED SWITCHGEAR

    Available format(s): 

    Superseded date:  27-08-2001

    Language(s): 

    Published date:  12-01-2013

    Publisher:  Institute of Electrical & Electronics Engineers

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

    1 Scope
    2 References
    3 Definitions
    3.1 Switch
    3.2 Interrupter switch
    3.3 Unfused switch
    3.4 Fused switch
    3.5 Integral switch and fuse
    3.6 Ground switch
    3.7 Disconnecting switch (isolating switch)
    3.8 Bypass switch
    3.9 Selector switch
    3.10 Service disconnect
    3.11 Design test
    3.12 Production test
    3.13 Conformance test
    3.14 Field test
    3.15 Tin surfaced or equivalent
    4 Service conditions
    5 Ratings
    5.1 General
    5.2 Required ratings
    5.2.1 Load current interrupter switches
    5.2.2 Disconnectors, transfer, or selector switches
    5.2.3 Grounding switches
    5.3 Rated maximum voltage
    5.4 Rated lightning impulse withstand voltage
    5.5 Rated power frequency withstand voltage
    5.6 Rated power frequency
    5.7 Rated continuous current
    5.8 Rated load switching current
    5.9 Rated momentary withstand current
    5.10 Rated short-time withstand current
    5.11 Rated short-time withstand current duration
    5.12 Rated fault making current
    5.13 Rated fault making current for integral switch and
          fuse (optional)
    5.14 Rated control voltage
    5.15 Rated cable-charging switching current (optional)
    5.16 Rated unloaded transformer switching current (optional)
    5.17 Rated direct acting fuse tripping current (optional)
    5.18 Temperature limitations
    5.18.1 Limiting temperatures
    5.18.2 Temperature limits for insulating materials
    5.18.3 Temperature limits for switch conducting parts
    6 Test
    6.1 General
    6.2 Design test
    6.2.1 Dielectric test
    6.2.2 Continuous current test
    6.2.3 Momentary and short-time current test
    6.2.4 Fault making test
    6.2.5 Mechanical operation test
    6.2.6 Load switching current test
    6.2.7 Cable-charging current switching test (optional)
    6.2.8 Unloaded-transformer switching test (optional)
    6.2.9 Direct acting fuse switching test
    6.3 Production tests
    6.4 Conformance tests
    6.5 Field test
    7 Construction
    7.1 General requirements
    7.1.1 Primary connections
    7.1.2 Insulating materials
    7.2 Functional components
    7.2.1 Contact position indicator
    7.2.2 Stored energy indicator
    7.2.3 Locking
    7.2.4 Nameplate markings
    8 Application guide
    8.1 General
    8.2 Voltage
    8.3 Frequency
    8.4 Continuous current
    8.5 Short-circuit current
    8.6 cable charging current
    8.7 Unloaded transformer switching capability
    8.8 Direct acting fuse tripping
    8.8 Unusual service conditions
    8.9 Maintenance
    Figure 1 Momentary and fault making test circuits
    Figure 2 Dielectric test

    Abstract - (Show below) - (Hide below)

    Covers indoor AC medium-voltage switches for use in enclosures for application in power circuits at voltages above 1kV through 38kV as follows: stationary or drawout; manual or power operation; fused or unfused.

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

    Comment Closes On
    Document Type Draft
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By

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

    IEEE C37.20.2-2015 IEEE Standard for Metal-Clad Switchgear
    NFPA 70B : 2016 RECOMMENDED PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE
    IEEE C37.71-2001 IEEE Standard for Three-Phase Manually Operated Subsurface and Vault Load-Interrupting Switches for Alternating-Current Systems
    IEEE C37.48-2005 IEEE Guide for the Application, Operation, and Maintenance of High-Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories
    IEEE 4-2013 IEEE Standard for High-Voltage Testing Techniques
    IEEE C37.20.3-2013 REDLINE IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV)
    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 C37.34-1994 IEEE Standard Test Code for High-Voltage Air Switches
    NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
    IEEE C37.09-1999 IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
    IEEE C37.73-1998 IEEE Standard Requirements for Pad-Mounted Fused Switchgear
    IEEE C37.41-2008 REDLINE IEEE Standard Design Tests for High-Voltage (>1000 V) Fuses, Fuse and Disconnecting Cutouts, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Fuse Links and Accessories Used with These Devices
    IEEE C37.30-1997 IEEE Standard Requirements for High Voltage Switches
    ANSI C37.22:1997 AMERICAN NATIONAL STANDARD PREFERRED RATINGS AND RELATED REQUIRED CAPABLITIES FOR INDOOR AC MEDIUM VOLTAGE SWITCHES USED IN METAL-ENCLOSED SWITCHGEAR
    ANSI C37.72 : 1987 MANUALLY-OPERATED DEAD-FRONT - PADMOUNTED SWITCHGEAR WITH LOAD-INTERRUPTING SWITCHES AND SEPARABLE CONNECTORS FOR ALTERNATING CURRENT SYSTEMS
    IEC 60420:1990 High-voltage alternating current switch-fuse combinations
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