• BS EN 50068:1991

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

    WROUGHT STEEL ENCLOSURES FOR GAS FILLED HIGH VOLTAGE SWITCHGEAR AND CONTROLGEAR

    Available format(s):  Hardcopy, PDF

    Withdrawn date:  10-12-2018

    Language(s):  English

    Published date:  01-01-1991

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    0 Scope
    1 Modulation characteristics of the data channel
              (physical layer)
    1.1 Subcarrier frequency
    1.2 Subcarrier phase
    1.3 Subcarrier level
    1.4 Method of modulation
    1.5 Clock-frequency and data-rate
    1.6 Differential coding
    1.7 Data-channel spectrum shaping
    2 Baseband coding (data-link layer)
    2.1 Baseband coding structure
    2.2 Order of bit transmission
    2.3 Error protection
    2.4 Synchronization of blocks and groups
    3 Message format (session and presentation
              layers)
    3.1 Addressing
    3.1.1 Design principles
    3.1.2 Principal features
    3.1.3 Group types
    3.1.3.1 Type 0 groups: Basic tuning and switching
              information
    3.1.3.2 Type 1 groups: Programme-item number and slow
              labelling codes
    3.1.3.3 Type 2 groups: Radiotext
    3.1.3.4 Type 4A groups: Clock-time and date
    3.1.3.5 Type 5 groups: Transparent data channels
    3.1.3.6 Type 6 groups: In-house applications
    3.1.3.7 Type 7A groups: Radio paging
    3.1.3.8 Type 9A groups: Emergency warning system
    3.1.3.9 Type 14 groups: Enhanced Other Networks
              information
    3.1.3.10 Type 15B groups: Fast basic tuning and
              switching information
    3.2 Coding of information
    3.2.1 Coding of information for control
    3.2.1.1 Programme-identification (PI) codes and
              Extended Country codes (ECC)
    3.2.1.2 Programme-type (PTY) codes
    3.2.1.3 Traffic-programme (TP) and traffic-
              announcement (TA) codes
    3.2.1.4 Music/speech (M/S) switch code
    3.2.1.5 Decoder-identification (DI) codes
    3.2.1.6 Coding of Alternative frequencies (AFs) in
              group 0A
    3.2.1.7 Programme-item number (PIN) codes
    3.2.1.8 Coding of Enhanced Other Networks
              information (EON)
    3.2.2 Coding of information for display
    3.2.3 Coding of clock-time and date
    3.2.4 Coding of information for transparent data
              channels
    3.2.5 Coding of information for in-house
              applications
    3.2.6 Coding of Radio paging (RP)
    3.2.6.1 Introduction
    3.2.6.2 Coding characteristics for paging
    3.2.6.3 Examples of the traffic handling capacity of
              the specified RP system
    3.2.7 Coding of Emergency warning system (EWS)
    4 Glossary of terms of applications
    4.1 Programme identification (PI)
    4.2 Programme service (PS) name
    4.3 Programme type (PTY)
    4.4 Traffic-programme identification (TP)
    4.5 List of Alternative frequencies
    4.6 Traffic-announcement identification (TA)
    4.7 Decoder identification (DI)
    4.8 Music/speech switch (M/S)
    4.9 Programme-item number (PIN)
    4.10 Radiotext (RT)
    4.11 Enhanced Other Networks information (EON)
    4.12 Transparent data channel (TDC)
    4.13 In-house application (IH)
    4.14 Clock-time and date (CT)
    4.15 Radio paging (RP)
    4.16 Emergency warning systems (EWS)
    4.17 Traffic Message Channel (TMC)
    5 Marking
    Annexes
    A Offset words to be used for group and block
              synchronization
    B Theory and implementation of the modified
              shortened cyclic code
    C Implementation of group and block
              synchronization using the modified shortened
              cyclic code
    D Programme identification codes and Extended
              country codes
    E Character definition for Program Service name,
              Radiotext and Alphanumeric Radio paging
    F Programme Type codes
    G Conversion between time and date conventions
    H Specification of the ARI system
    J Index of abbreviations
    K RDS logo
    L Bibliography
    National annex NA (informative) Committees responsible
    National annex NB (informative) Cross-reference

    Abstract - (Show below) - (Hide below)

    Applies to fusion welded wrought steel enclosures pressurized with dry air, inert gases, e.g. sulfur hexafluoride or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high voltage switchgear and controlgear with rated voltages 72,5 kV and above, where the gas is used for its dielectric and/or arc quenching properties. Enclosures comprise parts of electrical equipment such as circuit breakers, switch disconnectors, earthing switches, current and voltage transformers, surge arrestors and bushbars and connections. Includes pressurized components such as centre chamber of live tank switchgear, gas insulated current transformers, etc.

    General Product Information - (Show below) - (Hide below)

    Committee PEL/17/1
    Development Note Supersedes 86/30266 DC. (09/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Withdrawn
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS EN 50187 : 1997 GAS-FILLED COMPARTMENTS FOR A.C. SWITCHGEAR AND CONTROLGEAR FOR RATED VOLTAGES ABOVE 1 KV AND UP TO AND INCLUDING 52 KV

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 6878(1988) : 1988 SPECIFICATION FOR HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR FOR INDUSTRIAL USE - CAST ALUMINIUM ALLOY ENCLOSURES FOR GAS-FILLED HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR
    ISO 6213:1989 Welding Factors to be considered to ensure quality in welded structures
    BS 5750-0.1(1987) : 1987 QUALITY SYSTEMS - PRINCIPAL CONCEPTS AND APPLICATIONS - GUIDE TO SELECTION AND USE
    BS 7315(1990) : 1990 SPECIFICATION FOR WROUGHT ALUMINIUM AND ALUMINIUM ALLOY ENCLOSURES FOR GAS-FILLED HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR
    BS 7501(1989) : 1989 GENERAL CRITERIA FOR THE OPERATION OF TESTING LABORATORIES
    ISO 1099:2017 Metallic materials — Fatigue testing — Axial force-controlled method
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