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BS EN 50488:2021

BS EN 50488:2021

$167.15

Railway applications. Fixed installations. Electrical protective measures for working on or near an overhead contact line system and/or its associated return circuit

Published By Publication Date Number of Pages
BSI 2021 42
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This document provides requirements for electrical safety for:

  • dead working on an overhead contact line system;

  • working activities near an overhead contact line system when it is live.

It applies to all work activities in relation to electrical hazards only.

This document is applicable to overhead contact line systems with the following nominal voltages and configurations:

  • 1,5 kV and 3 kV DC;

  • 15 kV, 2×15 kV, 25 kV and 2×25 kV AC.

It also provides requirements for work activities that can give rise to electrical hazards from the return circuit.

This document does not cover electrical risk arising from:

  • live working on overhead contact line systems (live working can be carried out according to national requirements, regulations and practices);

  • working on or near other electrical sources or electrical systems connected to or close to the OCL system and its return circuit.

If there are no other rules or procedures, the principles described in this document can be applied to overhead contact line systems with other nominal voltages.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.1.1 General
12 3.1.2 Personnel, organization and communication
13 3.1.3 Zones and distances during work activities
15 3.1.4 Working
16 3.1.5 Protective devices
3.2 Symbols
17 3.3 Abbreviated terms
4 Basic principles
4.1 Electrical safety for work activity
4.1.1 General
4.1.2 Planning for an electrically safe work environment
18 4.1.3 Creating an electrically safe work environment
4.1.4 Maintaining the electrically safe work environment during work activities
4.1.5 Restoring the planned operating condition
4.2 Personnel
19 4.3 Organization
4.3.1 General
4.3.2 Designated person in control of an electrical installation (EI)
4.3.3 Designated person in control of an electrical installation during work activity (EW)
4.3.4 Designated person in control of work activity (WA)
20 4.4 Communication
4.5 Work location
21 4.6 Tools, equipment and devices
4.7 Documentation for safe working
4.8 Signs
22 4.9 Emergency arrangements during work activity
5 Protective measures for work activities on or near overhead contact line system
5.1 General
5.2 Dead working
5.2.1 General
23 5.2.2 Disconnect completely from all sources of supply
5.2.3 Secure against re-connection
5.2.4 Verify absence of operating voltage (verify installation is dead)
5.2.5 Carry out earthing and short-circuiting
24 5.2.6 Provide protection against adjacent hazardous-live-parts
5.2.7 Permission to start work after implementing protective measures
5.2.8 Re-energizing after work
25 5.3 Working near to hazardous live parts
5.3.1 General
5.3.2 Protection by protective devices
26 5.3.3 Protection by minimum approach distance
5.3.3.1 General
27 5.3.3.2 Physical measure to limit the movement of workers
28 5.3.4 Machinery approaching hazardous-live-parts
5.4 Live working
29 5.5 Electromagnetic influences
5.6 Environmental conditions
6 Working procedures for work activities on or near return circuit
6.1 General
6.2 Working on or near parts of return circuit without electrical shock hazards in normal operating condition
30 6.3 Working on or near parts of return circuit with electrical shock hazards in normal operating condition
6.3.1 General
6.3.2 Working on or near hazardous-live-parts made dead for working
6.3.3 Working near hazardous-live-parts
31 7 Recommended distances in air for work activities
32 Annex A (informative)Method of calculation of the distances in air for working procedures
A.1 Calculation of the outer limit of the danger zone DR
A.2 Determination of approach distances DL and DA
33 A.3 Determination of DV
A.4 Distances overview
35 Annex B (informative)Examples of physical measures to limit the movement of workers
B.1 General
36 B.2 Distances between physical measure and hazardous-live-part when working zone encroaches DV
37 B.3 Distances between physical measure and hazardous-live-part when working zone does not encroach DV
39 Annex C (informative)Illustration of selection process of the protective measures

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BS EN 50488:2021
$167.15