CEI 20-21/1-1 : 2007
Current
The latest, up-to-date edition.
ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 1-1: CURRENT RATING EQUATIONS (100% LOAD FACTOR) AND CALCULATION OF LOSSES - GENERAL
Hardcopy , PDF
English
01-01-2007
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FOREWORD
INTRODUCTION
1 General
2 Calculation of losses
Pertains to the conditions of steady-state operation of cables at all alternating voltages, and direct voltages up to 5 kV, buried directly in the ground, in ducts, troughs or in steel pipes, both with and without partial drying-out of the soil, as well as cables in air.
| Committee |
CT 20
|
| DevelopmentNote |
Supersedes CEI 20-21. (05/2008)
|
| DocumentType |
Standard
|
| Pages |
38
|
| PublisherName |
Comitato Elettrotecnico Italiano
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| IEC 60287-1-1:2006+AMD1:2014 CSV | Identical |
| IEC 60028:1925 | International standard of resistance for copper |
| IEC 60228:2004 | Conductors of insulated cables |
| IEC 60502-2:2014 RLV | Power cables with extruded insulation and their accessories for rated voltages from 1 kV (<em>U</em><sub>m</sub> = 1,2 kV) up to 30 kV (<em>U</em><sub>m</sub> = 36 kV) – Part 2: Cables for rated voltages from 6 kV (<em>U</em><sub>m</sub> = 7,2 kV) up to 30 kV (<em>U</em><sub>m</sub> = 36 kV) |
| IEC 60502-1:2004+AMD1:2009 CSV | Power cables with extruded insulation and their accessories for rated voltages from 1 kV (<em>U</em><sub>m</sub> = 1,2 kV) up to 30 kV(<em>U</em><sub>m</sub> = 36 kV) - Part 1: Cables for rated voltages of 1 kV (<em>U</em><sub>m</sub> = 1,2 kV) and 3 kV (<em>U</em><sub>m</sub> = 3,6 kV) |
| IEC 60889:1987 | Hard-drawn aluminium wire for overhead line conductors |
| IEC 60027-3:2002 | Letter symbols to be used in electrical technology - Part 3: Logarithmic and related quantities, and their units |
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