IEC 60269-2-2013 pdf free

07-20-2021 comment

IEC 60269-2-2013 pdf free.Low-voltage fuses – Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) – Examples of standardized systems of fuses A to K.
IEC 60269-1 applies with the following supplementary requirements.
5.2 Rated voltage
For a.c., the standard values of rated voltage are 400 V. 500 V and 690 V. For d.c., the rated voltages are 250 V and 440 V. The standard values of d.c. rated voltage are not related to the standard values of a.c. rated voltage. For example, the following standard combinations are possible: 500 V a.c. and 250 V d.c., 500 V a.c. and 440 V d.c.. 500 V a.c., etc.
The rated voltage of fuse-bases according to Figure 102 is 690 V or higher.
5.3.1 Rated current of the fuse-link
For each size the maximum rated currents are given in Figure 101. These values depend upon the utilization categories and rated voltages.
A rated current of 224 A is added to the values as given in 5.3.1 of IEC 60269-1.
5.3.2 Rated current of the fuse-holder
The rated current for the different sizes of the fuse-bases is given in Figure 102.
5.5 Rated power dissipation of a fuse-link and rated acceptable power dissipation of a fuse-holder
The maximum values of rated power dissipation for the different sizes of fuse-links are specified in Figure 101. The values apply to the maximum rated currents of the fuse-links. The values of rated acceptable power dissipation of fuse-bases are given in Figure 102.
5.6 Limits of time-current characteristics
5.6.1 Time-current characteristics, time-current zones and overload curves
The tolerance on time-current characteristics given by the manufacturer shall not deviate by more than ±10% in terms of current. The time-current zones given in Figure 104. including manufacturing tolerances shall be met by all pre-arcing and total times measured at the test voltage according to 8.7.4.
5.6.2 Conventional times and currents
The conventional times and currents, in addition to the values of IEC 60269-1, are given in Table 101.
6 Markings
IEC 60269-1 applies with the following supplementary requirements.
Fuse-links and fuse-holders which meet the requirements and tests of fuse system A of this
standard may be marked with lEG 60269-2.
6.1 Markings of fuse-holders
In addition to IEC 60269-1, the following marking applies:
— size.
The marking of the rated current and the rated voltage shall be discernible from the front when a fuse-link has not been fitted.
6.2 Markings of fuse-links
In addition to IEC 60269-1, the following marking applies:
size or reference;
rated breaking capacity.
The marking of the rated current and the rated voltage shall be discernible from the front.
Furthermore, fuse-links shall be marked as described in Table 104.IEC 60269-2 pdf download.

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