WG 23 - TC 9/WG 23

Gives additional or amended rules for high voltage fuses as a supplement to those given by IEC 60077-2. States specifically the characteristics of the fuses, their service conditions, the tests to be performed, and the markings.

Gives rules for AC circuit-breakers, the main contacts of which are to be connected to AC overhead contact lines; the nominal voltage of these circuits is in accordance with IEC 60850. Complements the general requirements given in IEC 60077-2.

In addition to the general requirements of IEC 60077-2, it gives the rules for circuit-breakers, the main contacts of which are to be connected to d.c. power and/or auxiliary circuits. The nominal voltage of these circuits does not exceed 3 000 V d.c. according to IEC 60850.

States the characteristics of the resistors; the service conditions with which the power resistors have to comply; the tests intended for confirming that these conditions have been met and the methods to be adopted for these tests; the information to be marked on, or given with, the resistors. The object of this standard is to adapt the general rules given in IEC 60077-1 to power resistors for rolling stock in order to obtain uniformity of requirements and tests throughout the corresponding range of components and to avoid the need for testing to two different standards.

Specifies the general service conditions and requirements for all electric equipment installed in power circuits, auxiliary circuits, control and indicating circuits etc., on rolling stock. Intends to harmonize as far as practicable all rules and requirements of a general nature applicable to electric equipment for rolling stock..

Provides general rules for all electrotechnical components installed in power circuits, control and indicating circuits on rail rolling stock. It supplements the rules given in part 1 of IEC 60077. This part and the part 1 replaces IEC 60077 published in 1968.