BS 6353:1983
Current
The latest, up-to-date edition.
Specification for underground loudspeaker communication systems in coal mines
Hardcopy , PDF
English
29-04-1983
Important note : Users cannot be edited or removed once added to your Multi user PDF.
Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Electrical interface characteristics
4. Interconnection facilities
5. Tone signals
6. Transmission distance
7. Marking
8. Documentation
Appendices
A. Design of safety couplers and barriers
B. Cable
Table
1. Electrical interface characteristics
Figures
1. Underground loudspeaker communication system
2. System electrical parameters
3. Safety coupler
4. Safety barrier
Specifies electrical interface characteristics, interconnection facilities, tone signals and transmission distance.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes 81/75758 DC (09/2005) Reviewed and confirmed by BSI, January 2011. (12/2010)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This British Standard specifies requirements for underground loudspeaker communication systems that are equipped with the facility for connecting speech and other audio signals to another loudspeaker communication system and/or to an appropriate surface switchboard to form a loudspeaker communication network.
Electrical input and output characteristics of underground loudspeaker communication systems necessary to achieve operational compatibility when they are interconnected are specified.
The requirements for tone signals specified in clause 5 do not apply to signals that are not transmitted to another system.
This standard is applicable to underground loudspeaker communication systems that are intended to be certified intrinsically safe for use in coal mines in accordance with BS 5501-9 for group I category “ia” systems.
This standard is not applicable to mine telephone systems.
NOTE 1 Further requirements for intrinsic safety are specified in BS 1259 and BS 5501-7.
NOTE 2 The titles of the publications referred to in this standard are listed on the inside back cover.
| BS 6704:1996 | Code of practice for selection, installation and maintenance of intrinsically safe electrical equipment in coal mines |
| BS 5501-9:1982 | Electrical apparatus for potentially explosive atmospheres Specification for intrinsically safe electrical systems \'i\' |
| BS 5501-7:1977 | Electrical apparatus for potentially explosive atmospheres Intrinsic safety \'i\' |
| BS 6746(1976) : LATEST |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.