1 General
1.1 Scope
1.2 Normative references
1.101 General requirements
2 Normal and special service conditions
3 Definitions
3.1 General terms
3.2 Assemblies
3.3 Parts of assemblies
3.4 Switching devices
3.5 Parts of switching devices
3.6 Operation
3.7 Characteristic quantities
3.8 Index of definitions
4 Ratings
4.1 Rated voltage (Ur)
4.2 Rated insulation level
4.3 Rated frequency (fr)
4.4 Rated normal current (lr) and temperature rise
4.5 Rated short-time withstand current (lk)
4.6 Rated peak withstand current (lp)
4.7 Rated duration of short-circuit (tk)
4.8 Rated supply voltage of closing and opening devices
and of auxiliary and control circuits (Ua)
4.9 Rated supply frequency of closing and opening
devices and of auxiliary circuits
4.10 Rated pressure of compressed gas supply for operation
and/or interruption
4.101 Rated mainly active load-breaking current (l1)
4.102 Rated closed-loop breaking current (l2a and l2b)
4.103 Rated no-load transformer breaking current (l3)
4.104 Rated cable-charging breaking current (l4a)
4.105 Rated line-charging breaking current (l4b)
4.106 Rated single capacitor bank breaking current for
special purpose switches (l4c)
4.107 Rated back-to-back capacitor bank breaking
current for special purpose switches (l4d)
4.108 Rated back-to-back capacitor inrush making
current for special purpose switches (lin)
4.109 Rated earth fault breaking current (l6a)
4.110 Rated cable- and line-charging breaking
current under earth fault conditions (l6b)
4.111 Rated motor breaking current for special
purpose switches (l7)
4.112 Rated short-circuit making current (lma)
4.113 Rated breaking and making currents for a
general purpose switch
4.114 Ratings for limited purpose switches
4.115 Ratings for special purpose switches
4.116 Ratings for switches backed by fuses
5 Design and construction
5.1 Requirements for liquids in high-voltage switches
5.2 Requirements for gases in high-voltage switches
5.3 Earthing of high-voltage switches
5.4 Auxiliary and control equipment
5.5 Dependent power operation
5.6 Stored energy operation
5.7 Independent manual operation
5.8 Operation of releases
5.9 Low- and high-pressure interlocking and monitoring
devices
5.10 Nameplates
5.11 Interlocking devices
5.12 Position indication
5.13 Degrees of protection by enclosures
5.14 Creepage distances
5.15 Gas and vacuum tightness
5.16 Liquid tightness
5.17 Flammability
5.18 Electromagnetic compatibility (EMC)
5.101 Making and breaking operations
5.102 Requirements for switch-disconnectors
5.103 Mechanical strength
5.104 Securing the position
5.105 Auxiliary contacts for signalling
6 Type tests
6.1 General
6.2 Dielectric tests
6.3 Radio interference voltage (RIV) tests
6.4 Measurement of the resistance of the main circuit
6.5 Temperature-rise tests
6.6 Short-time withstand current and peak withstand current
tests
6.7 Verification of the protection
6.8 Tightness tests
6.9 Electromagnetic compatibility (EMC) tests
6.101 Making and breaking tests
6.102 Mechanical operation tests
6.103 Operation under severe ice conditions
7 Routine tests
7.101 Mechanical operating tests
8 Guide to the selection of high-voltage switches for service
8.1 General
8.2 Conditions affecting application
8.3 Insulation coordination
8.4 Selection of class of switch
9 Information to be given with inquiries, tenders and orders
9.1 Information to be given with inquiries and orders
9.102 Information to be given with tenders
10 Rules for transport, storage, erection, operation and
maintenance
11 Safety
Tables
1 Rated line- and cable-charging breaking currents for
general purpose switch
2 Nameplate information
3 Supply circuit TRV parameters for mainly active load
current breaking tests
4a TRV parameters for distribution line closed loop breaking
tests
4b TRV parameters for parallel power transformer current
breaking tests
5 Test duties for general purpose switches - Test duties
for three-phase tests on three-pole operated,
pole-after-pole operated, and single pole switches
6 Test duties for general purpose switches - Single phase
tests on three-pole switches operated pole-after-pole and
single-pole switches applied on three-phase systems
7 Test duties for special purpose switches - Three-phase
tests on three-pole operated, pole-after-pole operated,
and single-pole switches
8 Test duties for special purpose switches - Single phase
tests on three-pole switches operated pole-after-pole and
single-pole switches applied on three-phase systems
9 Prospective recovery voltage parameter limits for
single-phase capacitor bank current breaking tests
Figures
1 Three-phase test circuit for mainly active load current
switching for test duty 1
2 Single-phase test circuit for mainly active load current
switching for test duty 1
3 Three-phase test circuit for distribution line closed-loop
and parallel transformer current switching test for test
duties 2a and 2b
4 Single-phase test circuit for distribution line closed-loop
and parallel transformer current switching test, for test
duties 2a and 2b
5 Three-phase test circuit for short-circuit making current
test for test duty 5
6 Single-phase test circuit for short-circuit making current
test for test duty 5
7 Prospective TRV parameter limits for single-phase capacitor
bank current breaking tests
8 Three-phase test circuit for earth fault breaking current
tests, for test duty 6a
9 Three-phase test circuit for cable-charging breaking
current tests under earth fault conditions, for test duty
6b
Annex ZA Normative references to international publications
with their corresponding European publications