BS EN 50171:2001 - Central power supply systems – BSI British Standards

BS EN 50171:2001

Central power supply systems

Status : Current, Work in hand   Published : August 2001



BS EN 50171:2001 specifies the general requirements for central power supply systems for an independent energy supply to essential safety equipment. This standard covers systems permanently connected to AC supply voltages not exceeding 1 000 V and that use batteries as the alternative power source.

The central power supplies are intended to energize emergency escape lighting in the case of failure of the normal supply, and may be suitable for energizing other essential safety equipment,
for example:

  • electrical circuits of automatic fire extinguishing installations
  • paging systems and signalling safety installations
  • smoke extraction equipment
  • carbon monoxide warning systems
  • specific safety installations related to specific buildings, e.g. high-risk areas.

Schematic representations of typical central power supply equipment are depicted in clause 4. When a UPS system is used to feed these essential safety systems, it must comply with EN 50091-1 and its relevant parts, and the additional requirements of this standard.

The power supply system for fire alarms covered by EN 54 are excluded.

ISBN: 0 580 38394 6

Standard NumberBS EN 50171:2001
TitleCentral power supply systems
StatusCurrent, Work in hand
Publication Date23 August 2001
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
International RelationshipsEN 50171:2001,EN 50171:2001/corrigendum Aug.
Draft Superseded By93/216720 DC
DescriptorsElectrical components, Emergency lighting, Escape lighting, Electrical safety, Dielectric strength, Electrical equipment, Electrical testing, Battery-powered devices, Electric power systems, Standby lighting, Emergency electrical installations, Electric control equipment, Electric cells, Electrical protection equipment, Electrical installations, Performance testing
Title in FrenchSystemes d'alimentation a source centrale
Title in GermanZentrale Stromversorgungssysteme
ISBN0 580 38394 6
File Size398 KB

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