BS 4999-145:1987
Current
The latest, up-to-date edition.
General requirements for rotating electrical machines Specification for winding terminations
Hardcopy , PDF
English
27-02-1987
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Committees responsible
Foreword
1 Scope
2 Definitions
3 Ratings
4 Ability of terminations for machines rated at 1100 V
and above to withstand system faults
5 Electrical clearances
6 Arrangements and enclosures
Tables
Specifies terminations for rotating machines rated up to 15 kV a.c. r.m.s. Types of terminations. Creepage and clearance distances, current ratings of connections, definitions.
| Committee |
PEL/2
|
| DevelopmentNote |
Supersedes BS 4999-71(1984). (04/2004) Reviewed and confirmed by BSI, October 2012. (09/2012)
|
| DocumentType |
Standard
|
| Pages |
10
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of this British Standard specifies types of and performance requirements for winding terminations for rotating electrical machines rated for a.c. voltages up to 15 kV r.m.s. Minimum creepage and clearance distances appropriate to the rated voltages are also specified.
This standard does not specify requirements for the ability of the terminations of the following machines to withstand a high energy fault:
- machines rated for voltages up to and including 660 V, which it is assumed, would be protected by fuses or other energy limiting devices.
- machines rated for voltages of 1 100 V and above either protected by fuses or other energy limiting devices or intended for operation on a system where the nominal short-circuit capacity is lower than the relevant value given in Table 1.
The standard applies to terminals, terminal boxes and terminal enclosures, but it does not specify requirements for flameproof terminal enclosures.
The choice of a particular termination will be largely governed by the service and environmental conditions, but the standard is also relevant to the various types of cables normally used, including aluminium and, where applicable, cable sealing and dividing boxes. It is outside the scope of this British Standard to cover external supply cables in detail, but insofar as the design of the terminals is concerned, essential data are listed.
Winding terminations for small power machines having rated outputs up to and including 0.75 kW or kV·A per 1 000 r/min, such as those specified in BS 5000-11, are not covered by this standard.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
| BS 5000-16:1997 | Rotating electrical machines of particular types or for particular applications Rotating electrical machines with type of protection \'N\' |
| BS 5000-11(1973) : 1973 | SPECIFICATION FOR ROTATING ELECTRICAL MACHINES OF PARTICULAR TYPES OR FOR PARTICULAR APPLICATIONS - PART 11: SMALL-POWER ELECTRIC MOTORS AND GENERATORS |
| BS 5372(1997) : 1997 | SPECIFICATION FOR DIMENSIONS OF CABLE TERMINATIONS FOR MULTI-CORE EXTRUDED SOLID DIELECTRIC INSULATED DISTRIBUTION CABLES OF RATED VOLTAGES 600/1000 V AND 1900/3300 V HAVING COPPER OR ALUMINIUM CONDUCTORS |
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