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eLibrary > BS EN IEC 62271-211:2024 - TC Tracked Changes. High-voltage switchgear and controlgear - Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages above 52 kV >

BS EN IEC 62271-211:2024 - TC Tracked Changes. High-voltage switchgear and controlgear - Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages above 52 kV, 2024

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BS EN IEC 62271-211:2024 - TC Tracked Changes. High-voltage switchgear and controlgear - Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages above 52 kV, 2024

30503359
A-30432561 [Go to Page]
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Annex ZA (normative)Normative references to international publicationswith their corresponding European publications [Go to Page]
English [Go to Page]
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Normal and special service conditions [Go to Page]
4.1 Normal service conditions
4.2 Special service conditions
5 Ratings [Go to Page]
5.1 General
5.2 Rated voltage (Ur)
5.3 Rated insulation level (Ud, Up, Us)
5.4 Rated frequency (fr)
5.5 Rated continuous current (Ir)
5.6 Rated short-time withstand current (Ik) and rated thermal short-time current (Ith)
5.7 Rated peak withstand current (Ip) and rated dynamic current (Id)
5.8 Rated duration of short-circuit (tk) and of thermal short-time current (tth)
6 Design and construction [Go to Page]
6.1 Gas and vacuum tightness
6.2 Gas pressure for insulation of the bushing inside the gas-insulated switchgear (GIS) enclosure
6.3 Pressure withstands requirements
6.4 Standard dimensions and tolerances [Go to Page]
6.4.1 General
6.4.2 Single-phase direct connection between oil-filled transformer and switchgear
6.4.3 Three-phase direct connection between oil-filled transformer and switchgear
6.4.4 Connection between gas-insulated transformer and switchgear
6.4.5 Transformer tolerances
6.4.6 Mounting of the transformer on its foundation
6.5 Limits of supply
6.6 Mechanical forces applied on the connection interface
6.7 Mechanical forces applied on the bushing flange
Tables [Go to Page]
Table 1 – Moments and forces applied on the bushing flange and transformer
6.8 Horizontal and vertical displacement
6.9 Vibrations
7 Type tests [Go to Page]
7.1 General
7.2 Dielectric tests [Go to Page]
7.2.1 Dielectric tests of bushing
7.2.2 Dielectric tests of transformer connection in a single-phase enclosure
7.2.3 Dielectric tests of transformer connection in a three-phase enclosure
7.3 Cantilever loads withstand tests
7.4 Gas tightness tests
8 Routine tests [Go to Page]
8.1 General
8.2 External pressure test of the bushing
8.3 Tightness tests
9 Guide to the selection of switchgear and controlgear (informative)
10 Information to be given with enquiries, tenders and orders (informative)
11 Transport, storage, installation, operating instructions and maintenance
12 Safety
13 Environmental aspects
Figures [Go to Page]
Figure 1 – Typical direct connection between power transformer and gas-insulated metal-enclosed switchgear
Figure 2 – Standard dimensions for typical direct connection between power transformer and gas-insulated metal-enclosed switchgear
Figure 3 – Transformer tolerances for a typical direct connection shown on the example of a three-phase power transformer connected to a single-phase gasinsulated metal enclosed switchgear
Figure 4 – Transformer tolerances for a typical direct connection shown on the example of a three-phase power transformer connected to a threephase gasinsulated metal enclosed switchgear up to 170 kV
Bibliography [Go to Page]

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BS EN IEC 62271-211:2024 - TC Tracked Changes. High-voltage switchgear and controlgear - Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages above 52 kV, 2024

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please select your company type below: