Документы

International Electrotechnical Commission

Railway applications – Fixed installations – Particular requirements for AC switchgear – Part 2: Disconnectors, earthing switches and switches with nominal voltage above 1 kV - Edition 2.0
 N 62505-2

Annotation

This part of IEC 62505 is applicable to single-pole, two-pole and three-pole alternating current (a.c.) disconnectors, earthing switches and switches which are:

• designed for indoor or outdoor fixed installations in tractions systems, and

• operated with an a.c. line voltage and frequency as specified in IEC 60850.

NOTE 1 IEC 60850 specifies the a.c. traction systems:

15 kV 16,7 Hz,

12 kV 25 Hz,

12,5 kV, 20 kV also 25 kV with 50 Hz, and

12,5 kV, 20 kV, 25 kV also 50 kV with 60 Hz.

NOTE 2 As rails of a.c. traction systems are typically connected to earth and included in the return current path, all phase-to-earth voltages will be within the tolerances as specified in IEC 60850. Nevertheless, phase-to-phase voltages are sometimes higher, e.g. in autotransformer systems.

Автоматический перевод:

Железнодорожные заявления – Фиксированные установки – Конкретные требования для распределительного устройства AC – Часть 2: Разъединители, выключатели заземления и выключатели с номинальным напряжением выше 1 кВ - Издание 2.0