IEEE C37.66-2021

$36.83

IEEE Standard Requirements for Capacitor Switches for AC Systems (1 kV to 38 kV)

Published By	Publication Date	Number of Pages
IEEE	2021

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Description

Revision Standard – Active. Required definitions, ratings, and procedures for performing design tests, production tests, and construction requirements for capacitor switches for ac systems from 1 kV to 38 kV are covered in this standard.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.66™-2021 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
13	1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage
14	2. Normative references 3. Definitions
15	4. Usual and unusual service conditions 4.1 Usual service conditions 4.2 Unusual service conditions
16	5. Ratings and requirements 5.1 General 5.2 Rating information
17	5.3 Rated maximum voltage (V) or (Ur) 5.4 Rated power frequency (fr) 5.5 Rated peak fault-making current 5.6 Rated symmetrical fault-making current
20	5.7 Rated capacitive switching current (Ir)
21	5.8 Rated peak withstand current (Ip)
22	5.9 Rated short-time (symmetrical) withstand current and duration (Ik) 5.10 Rated transient peak inrush current 5.11 Transient inrush frequency 5.12 Rated lightning impulse withstand voltage 5.13 Rated power-frequency withstand voltage 5.14 Rated control voltages and ranges
23	6. Design tests 6.1 General 6.2 Insulation (dielectric) tests
24	6.3 Short-time current tests 6.4 Rated fault-making current tests
25	6.5 Switching duty tests
26	6.6 Condition of capacitor switch after short-time current tests, rated fault-making current tests, and switching duty tests (see 6.3, 6.4, and 6.5) 6.7 Temperature-rise tests
27	6.8 Radio influence voltage (RIV) tests 6.9 Mechanical life tests
28	6.10 Control wiring tests 7. Production tests 7.1 Dielectric withstand test; 1 min dry power-frequency
29	7.2 Control, secondary wiring, and accessory devices check tests 7.3 Measurement of the resistance of the main circuit 7.4 Tightness tests 7.5 Design and visual checks 7.6 Mechanical operations tests 8. Construction requirements 8.1 Requirements for liquids in capacitor switches 8.2 Requirements for gases in capacitor switches
30	8.3 Grounding provisions 8.4 Auxiliary and control equipment 8.5 Dependent power operation 8.6 Stored energy mechanism charge indicator 8.7 Independent manual operation 8.8 Operation of releases 8.9 Low- and high-pressure interlocking devices 8.10 Nameplate markings
31	8.11 Interlocking devices 8.12 Position indicator 8.13 Degrees of protection by enclosures 8.14 Creepage distances for outdoor insulators
32	8.15 Gas and vacuum tightness 8.16 Liquid tightness 8.17 Flammability 8.18 Electromagnetic compatibility (EMC) 8.19 X-ray emission
33	Annex A (informative) Fault-handling ratings for capacitor switches A.1 Introduction A.2 Quantitative distinction A.3 Time constant (τmL) and X/R ratio
34	A.4 Related, required capabilities
35	Annex B (informative) Consideration of inrush current in back-to-back capacitor switching B.1 Introduction B.2 General application guidelines
36	B.3 Inrush current and frequency formulas for switching capacitor banks
37	B.4 Example equations
38	B.5 Formula definitions
39	Annex C (informative) Bibliography
40	Back cover