Elektrotechnika

Oblast zaměření: Nízkonapěťové pojistky
Komise : IEC/SC 32C (Miniature fuses)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 15.10.2024
Zobraz více Zobraz méně
 

This part of IEC 60127 covers requirements for miniature fuse-links for special applications with partial-range breaking capacity.

This part of IEC 60127 is applicable to fuse-links with a rated voltage not exceeding 1 000 V, a rated current not exceeding 150 A and a rated breaking capacity not exceeding 50 kA.

Miniature fuse-links with partial-range breaking capacity are used only to operate under short circuit conditions. They cannot be applied under overload conditions.

The design engineer needs to ensure no overload conditions can be seen by the fuse approved under IEC 60127-9.

This part of IEC 60127 does not apply to fuses completely covered by IEC 60127-7 as well as the subsequent parts of IEC 60269-1.

It does not apply to miniature fuse-links for appliances intended to be used under special conditions, such as in corrosive or explosive atmospheres.

This part of IEC 60127 applies in addition to the requirements of IEC 60127-1.

Miniature fuse-links for special applications with partial-range breaking capacity are not intended to be replaced by the end-user of an electrical / electronic appliance.

The object of this part of IEC 60127 is to establish uniform test methods for miniature fuse-links for special applications with partial-range breaking capacity, so as to allow verification of the values (for example melting time and breaking capacity values) specified by the manufacturer.

Oblast zaměření: Točivé elektrické stroje
Komise : IEC/TC 2 (Rotating machinery)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 15.10.2024
Zobraz více Zobraz méně
 

This part of IEC 60072-2 covers the majority of rotating electrical machines for industrial purposes within the dimension range and output powers:

Foot-mounted:                   shaft heights: 355 mm to 1000 mm

Flange-mounted:               pitch circle diameter of flange: 1180 mm to 2360 mm

It gives tables of fixing dimension, shaft extension dimensions and their tolerances. However, the variety of construction and the wide range of applications for the large machines with shaft heights above 315 mm have led to the establishment of a relatively large number of values for the dimension in order to cover all possible constructions. Owing to this, the present part covers a wider range than IEC 60072-1 within which, range values suitable for all designs or for a more detailed standardization can be chosen.

 

Note: the mounting dimensions given in this part for shaft heights 355 mm and 400 mm have been chosen from values given in IEC60072-1