CLC/TS 50502:2008

1 General
  1.1 Scope
  1.2 Normative references
  1.3 Definitions
  1.4 Voltages
  1.5 Classification of the voltage bands
2 Trolley bus construction
  2.1 Protection and electrical safety criteria
  2.2 Electrical components in band III voltage (high voltage)
  2.3 Electric traction equipment
  2.4 Emergency running equipment (independent from OHL)
  2.5 Electrical components in band II voltage (medium voltage)
  2.6 Electrical components in band I voltage (low voltage)
3 Checks and tests
  3.1 General
  3.2 New trolley-vehicles
  3.3 Overhauled trolley-vehicles
  3.4 On-duty trolley vehicles (periodical checks)
  3.5 Leakage detectors
Annex A (normative) Constructional detailed provisions
Annex B (normative) Trolley buses - Connection system to
        overhead contact lines
Annex C (normative) Constructional hints for connection systems
Bibliography

This Technical Specification applies to electrical systems on board trolley buses, as defined in 1.3.1, fed with a nominal line voltage (Un) between 600 V d.c. and 750 V d.c. This Technical Specification defines the requirements and constructional hints, especially to avoid danger of electrical kind to the public and to the personnel. CLC/TS 50502 is normative only for vehicles ordered and designed after publication of the same. This Technical Specification covers vehicles intended for public transport of persons. It refers mainly to earthed networks, but reference is made also to galvanically insulated networks. Annexes B and C are related to the connection systems. The detailed scope of these annexes is given in Annex B.