HD 622 S1:1996/A1:2000

Overview

Standard: HD 622 S1:1996/A1:2000 (adopted as SIST HD 622 S1:1998/A1:2002)
Organization: CLC (Harmonization Document)
Title: Power cables having rated voltages from 3,6/6 (7,2) kV up to and including 20,8/36 (42) kV with special fire performance for use in power stations

This CLC/HD document defines requirements for medium‑ and higher‑voltage power cables with enhanced fire performance intended specifically for use in power stations. The amendment (A1:2000) updates the original HD 622 S1:1996, reflecting maintenance and harmonization actions relevant to cables in the specified voltage range.

Key topics

The standard addresses core technical and quality aspects relevant to power station cabling. Typical topics and requirements covered include:

• Scope and voltage ratings: cables for rated voltages from 3.6/6 (7.2) kV up to and including 20.8/36 (42) kV.
• Fire performance: criteria for improved behaviour in fire conditions appropriate for power stations (smoke, flame propagation, circuit integrity implications).
• Cable construction and materials: guidance on conductor, insulation, bedding and sheath systems compatible with the required electrical and fire performance.
• Electrical and mechanical characteristics: requirements for current‑carrying capacity, short‑circuit withstand, bending and mechanical robustness.
• Testing and inspection: type and routine tests to verify electrical, mechanical and fire performance before delivery and during production.
• Marking, documentation and quality assurance: required labelling, technical documentation and factory quality controls for procurement and installation.

(Note: the above lists core topical areas typically defined in this HD; specific test methods or numeric limits are contained in the HD text.)

Applications

This standard is intended for use where continuity of power and safety under fire conditions are critical, for example:

• Power generation plants and substations
• On‑site distribution within thermal, hydro, nuclear and combined‑cycle power stations
• Design and specification of medium‑voltage cable systems where enhanced fire behaviour is required

Who uses this standard

• Cable manufacturers (product design and certification)
• Power utilities and plant engineers (specification and procurement)
• Electrical designers and consultants (system design and selection)
• Testing laboratories and inspection bodies (conformance verification)
• Safety and maintenance teams (risk mitigation and retrofit planning)

Related standards

This HD forms part of the harmonized family of cable standards (ICS 29.060.20). Users should consult other relevant HDs, IEC standards and national regulations for complementary requirements on testing, installation and fire safety.

Keywords: HD 622 S1, power cables, fire performance, power stations, rated voltages, CLC standard, medium‑voltage cables.