BS 5227:1992

Section one - General
1 Scope
Section two - Service conditions
2 Normal and special service conditions
Section three - Terms and definitions
3 Definitions
Section four - Rated characteristics
4 Rating
4.1 Rated voltage
4.2 Rated insulation level
4.3 Rated frequency
4.4 Rated normal current and temperature rise
4.5 Rated short-time withstand current
4.6 Rated peak withstand current
4.7 Rated duration of short circuit
4.8 Rated supply voltage of closing and opening
       devices and auxiliary circuits
4.9 Rated supply frequency of operating devices and
       auxiliary circuits
4.10 Rated pressure of compressed gas supply for
       operation
4.101 Rated filling pressure (of gas-filled
       compartments)
Section five - Rules for design and construction
5 Design and construction
5.1 Requirements for liquids in switchgear and
       controlgear
5.2 Requirements for gases in switchgear and
       controlgear
5.3 Earthing
5.4 Auxiliary equipment
5.5 Dependent power closing
5.6 Stored energy closing
5.7 Operation of releases
5.8 Low and high pressure interlocking devices
5.9 Nameplates
5.101 Degree of protection and internal fault
5.102 Enclosure
5.103 Partitions and shutters
5.104 Pressure relief of gas-filled compartments
5.105 Disconnectors and earthing switches
5.106 Interlocks
5.107 Provisions for dielectric tests on cables
Section six - Rules for type tests
6 Type tests
6.1 Dielectric tests
6.2 Radio interference voltage (RIV) tests
6.3 Temperature-rise tests
6.4 Measurement of the resistance of the main circuit
6.5 Short-time and peak withstand current tests
6.101 Verification of making and breaking capacities
6.102 Mechanical operation tests
6.103 Verification of the degree of protection
6.104 Pressure withstand test for gas-filled
       compartments
6.105 Gas tightness test of gas-filled compartments
6.106 Measurement of leakage currents
6.107 Weatherproofing test
6.108 Arcing due to internal fault
Section seven - Rules for routine tests
7 Routine tests
7.1 Power-frequency voltage tests on the main circuit
7.2 Dielectric tests on auxiliary and control
       circuits
7.3 Measurment of the resistance of the main circuit
7.101 Partial discharge measurement
7.102 Mechanical operation tests
7.103 Pressure tests of gas-filled compartments
7.104 Gas tightness tests of gas-filled compartments
7.105 Tests of auxiliary electrical, pneumatic and
       hydraulic devices
7.106 Verification of correct wiring
7.107 Tests after erection on site
7.108 Measurement of gas condition after filling on
       site
Section eight - General information
8 Guide to the selection of switching devices for
       services
9 Information to be given with enquiries, tenders
       and orders
9.101 Information with enquiries and orders
9.102 Information with tenders
10 Rules for transport, storage, erection and
       maintenance
10.1 Conditions during transport, storage and erection
10.2 Erection (mounting)
10.3 Maintenance
Figure
1 Standard test finger
Annexes
AA Internal fault
BB Method of calculating the cross-sectional area of
       bare conductors with regard to thermal stresses
       due to currents of short duration
CC Recommended method for the weatherproofing test
       for outdoor metal-enclosed switchgear and
       controlgear
DD Guide for voltage tests after erection on site
EE Rated insulation level for Series II
FF Partial discharge measurement
GG Gas tightness specifications and tests
ZA (normative) Other international publications
       quoted in this standard with the references of
       the relevant European publications
ZB (normative) Special national conditions
ZC (informative) A-deviations