IEEE C37.122-2021

$53.08

IEEE Standard for High-Voltage Gas-Insulated Substations Rated Above 52 kV

Published By	Publication Date	Number of Pages
IEEE	2021

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Description

Revision Standard – Active. The technical requirements for the design, fabrication, testing, and installation of a gas insulated substations are covered. The parameters to be supplied by the purchaser are set, and the technical requirements for the design, fabrication, testing, and installation details to be furnished by the manufacturer are established.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.122™-2021 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
14	1. Overview 1.1 Scope 1.2 Word usage 2. Normative references
16	3. Definitions
18	4. Normal (usual) and special (unusual) service conditions 4.1 General
19	4.2 Normal (usual) service conditions 4.3 Special (unusual) service conditions for both indoor and outdoor switchgear 5. Ratings 5.1 General
20	5.2 Rated maximum voltage (V) or (Ur) 5.3 Rated insulation level (Ud, Us, Up)
21	5.4 Rated power frequency (fr) 5.5 Rated continuous (normal) current and temperature rise 5.6 Rated short-time withstand current (Ik)
22	5.7 Rated peak withstand current (Ip) 5.8 Rated duration of short-circuit (tk) 5.9 Rated supply voltage of closing and opening devices and of auxiliary and control circuits (Ua) 5.10 Rated supply frequency of closing and opening devices and of auxiliary and control circuits 5.11 Rated bus-transfer voltage and current of disconnect switches11 5.12 Classification and rated values for disconnect switches with bus-charging current switching capability 5.13 Classification and rated induced current and voltage for grounding switches12
23	5.14 Rated short-circuit making current for grounding switches 6. Design and construction 6.1 Overview
24	6.2 Requirements for liquid in switchgear 6.3 Requirements for gases in switchgear 6.4 Grounding and bonding of switchgear 6.5 Auxiliary and control equipment
25	6.6 Dependent power operation 6.7 Stored energy devices 6.8 Independent manual operation 6.9 Operation of releases 6.10 Gas compartment interlocking and monitoring devices 6.11 Nameplates
31	6.12 Interlocking devices
32	6.13 Position indication 6.14 Degree of protection of enclosures 6.15 Creepage distance for outdoor insulators 6.16 Gas and vacuum tightness 6.17 Liquid tightness (insulating medium) 6.18 Flammability 6.19 Electromagnetic compatibility (EMC) 6.20 X-ray emission
33	6.21 Design of pressurized enclosures
35	6.22 Access for operations and maintenance 6.23 Bus expansion joints
36	6.24 Insulators, partitions, gas pass through insulators, and operating rods 6.25 Partitioning
37	6.26 Interfaces 6.27 Seismic requirements
38	6.28 High-voltage circuit breakers 6.29 Disconnect switches
39	6.30 Grounding switches
40	7. Design tests (type tests) 7.1 General
42	7.2 Dielectric tests
45	7.3 Radio influence voltage (RIV) test 7.4 Measurement of resistance of circuits 7.5 Temperature rise tests (continuous current test)
46	7.6 Short-time withstand current and peak withstand current tests
47	7.7 Verification of the degrees of protection provided by enclosures 7.8 Tightness test 7.9 Electromagnetic compatibility tests 7.10 Verification of making and breaking capacities 7.11 Mechanical and environmental tests
49	7.12 Pressure test on partitions17
50	7.13 Test under conditions of arcing due to an internal fault18 7.14 Insulator tests
51	7.15 Circuit breaker design tests 7.16 Fault-making capability test for high-speed grounding switches 7.17 Interrupting tests—Bus-transfer current switching capability for disconnect switches (special duty only)19
52	7.18 Interrupting tests—Switching of bus charging currents by disconnect switches20
55	7.19 Interrupting tests—Induced current switching of grounding switches25
56	7.20 Mechanical tests for disconnect and grounding switches
57	7.21 Operation at the temperature limits for outdoor equipment (if required by user) 7.22 Operation under severe ice conditions
58	7.23 Tests on the power kinematic chain 8. Routine testing 8.1 Overview 8.2 Dielectric test of main circuit 8.3 Tests on auxiliary and control circuits
59	8.4 Measurement of the resistance of the main circuit 8.5 Tightness tests 8.6 Pressure tests of enclosures 8.7 Mechanical operation tests 8.8 Tests on auxiliary circuits, equipment, and interlocks in the control mechanism 8.9 Pressure test on partitions
60	9. Gas handling 10. Field testing 10.1 General 10.2 Mechanical tests—Leakage 10.3 Mechanical tests—Gas quality (moisture, purity, and density) 10.4 Electrical tests—Continuity and resistance
61	10.5 Electrical tests—Low frequency ac voltage withstand 10.6 Electrical tests—Low frequency ac voltage withstand requirements and conditions 10.7 Electrical tests—Low frequency ac voltage withstand configurations and applications
62	10.8 Electrical tests—DC voltage withstand tests 10.9 Electrical tests—Assessment of the ac voltage withstand test 10.10 Electrical tests—Tests on auxiliary circuits 10.11 Mechanical and electrical functional tests—Checks and verifications
63	10.12 Mechanical and electrical tests—Documentation
64	Annex A (normative) Switch testing procedures A.1 Bus-transfer making and breaking tests26
66	A.2 Switching of bus charging currents by disconnect switches 72.5 kV and above27
70	A.3 Induced current switching of grounding switches28
74	A.4 Tests to verify proper functioning of position-indication device
75	Annex B (informative) Bibliography
76	Back cover