SYS POWER SUPPLY UM E
3.7
Selective Protection by Means of Fusing in the Sec-
ondary Circuit
High-quality power supply units are electronically protected against short circuit and
overload. For device protection external fuses in the secondary circuit are thus not required
for these power supply units.
Protecting current paths
individually
If the output current of a central 24 V power supply is distributed onto several loads, it is
recommended to protect each current path individually. In this way only the assigned fuse
blows in the event of a load failure. All remaining loads are still supplied with electrical
energy. In practice, the output current of a power supply unit is mainly distributed for
powerful power supply units. Maximum short-circuit current is of decisive importance to
reliable blowing of the fuse.
5598D029
Figure 3-21
Selective protection
3-28
PHOENIX CONTACT
5598_en_03
相关PDF资料
2938853 DIN RAIL POWER SUPPLY 24VDC 5A
2938866 POWER SUPPLY 10A 24VDC
2938879 POWER SUPPLY 40A 100-240AC 24DC
2938976 POWER SUPPLY 20A 100-240AC 48DC
299D225X0025AB1 CAP TANT 2.2UF 25V 20% RADIAL
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2938860-2 制造商: 功能描述: 制造商:undefined 功能描述:
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