Table of Contents

1 Scope
2 Normative references
3 Definitions
4 Service conditions
  4.1 Usual service conditions
  4.2 Unusual service conditions
5 Ratings
  5.1 General
  5.2 Rating information
  5.3 Rated maximum voltage
  5.4 Rated power frequency
  5.5 Rated peak fault-making current
  5.6 Rated symmetrical fault-making current
  5.7 Rated capacitive switching current
  5.8 Rated peak withstand current
  5.9 Rated short-time (symmetrical) withstand current
       and duration
  5.10 Rated high-frequency transient-making current
  5.11 Rated transient inrush frequency
  5.12 Rated lightning impulse withstand voltage
  5.13 Rated control voltages and ranges
6 Design tests
  6.1 General
  6.2 Insulation (dielectric) tests
  6.3 Short-time current tests
  6.4 Rated fault-making current tests
  6.5 Operating duty tests
  6.6 Condition of capacitor switch after short-time current
       tests, rated fault-making current tests, and operating
       duty tests
  6.7 Temperature rise tests
  6.8 Radio influence voltage tests
  6.9 Mechanical life tests
  6.10 Control wiring tests
7 Production tests
8 Construction requirements
  8.1 Grounding provision
  8.2 Manual operating provision
  8.3 Position indicator
  8.4 Nameplate marking
Annex A (informative) Fault handling ratings for capacitor
        switches
      A.1 Introduction
      A.2 Quantitative distinction
      A.3 Time constant (T[cc]) and X/R ratio
      A.4 Related required capabilities
Annex B (informative) Consideration of inrush current in
        back-to-back capacitor switching
      B.1 Introduction
      B.2 General application guidelines
      B.3 Inrush current and frequency formulas for switching
          capacitor banks
      B.4 Example equations
      B.5 Formula definitions
Annex C (informative) Simultaneous opening of single-phase
        capacitor switches on ungrounded wye capacitor
        installations
      C.1 Introduction
      C.2 Application considerations
Annex D (informative) Altitude correction factors
      D.1 Introduction
      D.2 Altitude correction factors
      D.3 Examples for switchgear with 110 kV lightning
          impulse withstand rating already rated for 1000 m
      D.4 Examples for switchgear ratings based on 110 kV
          lightning impulse withstand rating referred to
          sea level NTP without adjustment for 1000 m

Abstract

Describes the application of capacitive load switching wherein the capacitive loads are separated by sufficient inductance to limit the high-frequency transient-making peak current to the peak values shown in Table 2 and Table 3.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Supersedes	IEEE DRAFT C37.66 : D11 2005