AS 2263-1995

1 - AS 2263-1995 GAS-INSULATED METAL-ENCLOSED SWITCHGEAR FOR RATED VOLTAGES OF 72.5 kV AND ABOVE
4 - PREFACE
6 - CONTENTS
9 - 1 Scope
9 - 2 Normal and special service conditions
9 - 3 Definitions
12 - 4 Rating
12 - 4.1 Rated Voltage
12 - 4.2 Rated insulation level
13 - 4.3 Rated frequency
13 - 4.4 Rated normal current and temperature rise
13 - 4.5 Rated short-time withstand current
13 - 4.6 Rated peak withstand current
14 - 4.7 Rated duration of short-circuit
14 - 4.8 Rated supply voltage of closing and opening devices and auxiliary circuits
14 - 4.9 Rated supply frequency of operating devices and auxiliary circuits
14 - 4.10 Rated pressure of compressed gas supply for operating mechanisms
14 - 4.101 Rated density of gas for insulation
14 - 5 Design and construction
15 - 5.1 Requirements for liquids in switchgear and controlgear
15 - 5.2 Requirements for gases in switchgear and controlgear
15 - 5.3 Earthing
15 - 5.4 Auxiliary equipment
15 - 5.5 Dependent power closing
16 - 5.6 Stored energy closing
16 - 5.7 Operation of releases
16 - 5.8 Low and high pressure interlocking devices
16 - 5.9 Nameplates
16 - 5.101 Degree of protection
17 - 5.102 Internal fault
19 - 5.103 Enclosures
20 - 5.104 Partitions
21 - 5.105 Pressure relief
21 - 5.106 Disconnectors and earthing switches
22 - 5.107 Interlocks
22 - 5.108 Noise
23 - 5.109 Provisions for dielectric tests on cables
23 - 6 Type tests
24 - 6.1 Dielectric tests
30 - 6.2 Radio interference voltage (RIV) tests
30 - 6.3 Temperature-rise tests
30 - 6.4 Measurement of the resistance of the main circuit
31 - 6.5 Short-time and peak withstand current tests
32 - 6.101 Verification of making and breaking capacities
32 - 6.102 Mechanical operation tests
33 - 6.103 Verification of the degree of protection for auxiliary circuits and moving parts
33 - 6.104 Proof tests for enclosures
34 - 6.105 Weatherproofing test
34 - 6.106 Test under conditions of arcing due to an internal fault
35 - 6.107 Thermal stability test
35 - 6.108 Operation tests at limit temperatures
36 - 6.109 Gas tightness tests
36 - 7 Routine tests
37 - 7.1 Power-frequency voltage tests on the main circuit
37 - 7.2 Dielectric tests on auxiliary and control circuits
37 - 7.3 Measurement of the resistance of the main circuit
37 - 7.101 Partial discharge measurement
37 - 7.102 Pressure tests of enclosures
37 - 7.103 Gas tightness tests
38 - 7.104 Mechanical operation tests
38 - 7.105 Tests of auxiliary electrical, pneumatic and hydraulic devices
38 - 7.106 Verification of the correct wiring
38 - 7.107 Tests after erection on site
43 - 8 Guide to the selection of the switchgear for service
44 - 9 Information to be given with enquiries, tenders and orders
44 - 9.101 Information with enquiries and orders
45 - 9.102 Information with tenders
46 - 10 Rules for transport, storage, erection and maintenance
46 - 10.1 Conditions during transport, storage and erection
46 - 10.2 Erection
46 - 10.3 Maintenance
47 - Annex AA - Recommended method for the weatherproofing test for outdoor gas-insulated metal-enclosed switchgear
50 - Annex BB - Methods for testing gas-insulated metal-enclosed switchgear under conditions of arcing due to an internal fault
50 - BB1 Introduction
50 - BB2 Short-circuit current arcing test
52 - BB3 Composite verification by calculation and separate tests
53 - Annex CC - Technical and practical considerations of site testing
53 - CC1 Test voltage generators
53 - CC2 Locating discharges
54 - CC3 Special test procedures
54 - CC4 Partial discharge measurements
55 - CC5 Electrical conditioning
55 - CC6 Repetition tests
56 - Annex DD - Gas tightness specifications and tests
56 - DD1 Scope and object
56 - DD2 Definitions
58 - DD3 Specifications for gas tightness
59 - DD4 Tests
63 - Amendment 1

Applies to gas-insulated metal-enclosed switchgear in which the insulation is obtained, at least partly, by an insulating gas other than air at atmospheric pressure for alternating current of rated voltages of 72.5 kV and above, for indoor and outdoor installation, and for service frequencies up to and including 60 Hz. This Standard is identical with and has been reproduced from IEC 517:1990, including Amendment 1:1994.

This standard specifies requirementsfor gas-insulated metal-enclosedswitchgear in which the insulation is obtained, at least partly, by an insulating gas other than air at atmospheric pressure, for alternating current of rated voltages of 72,5 kV and above, for indoor and outdoor installation, and for service frequencies up to and including 60 Hz. For the purpose of this standard the term "switchgear" is used for "gas-insulated metal-enclosed switchgear". The gas-insulated metal-enclosed switchgear covered by this standard consists of individual components intended to be directly connected together and able to operate only in this manner.This standard completes and amends, if necessary, the various relevant standards applying to the individual components constituting gas-insulated metal-enclosed switchgear. Unless otherwise specified, the gas-insulated metal-enclosed switchgear is designed to be used under normal service conditions.

First published as AS 2263-1979.
Second edition 1984.
Third edition 1995.