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3 Protection and measurement functions
3.2 Protection functions
20
PXR Electronic trip unit
01/21 MN012005EN
www.eaton.com
Figure 4:
Main LSIG tripping characteristic
L =
l
ong delay (= overload protection I
r
)
S =
s
hort delay (= short-time delayed short-circuit protection I
sd
)
I =
i
nstantaneous (= instantaneous short-circuit protection I
i
)
G =
g
round fault (= ground-fault protection I
g
)
→
To evaluate the tripping characteristics, please refer to the
Eaton publication “Setting-specific representation of tripping
characteristics and competent assessment of their interaction”,
which is available for download on the Eaton website:
www.eaton.eu/ecm/groups/public/@pub/@europe/@electrical/documents/content/pct_998455_de.pdf
→
The xSpider software is available on the Eaton website at
t
sd
I
i
I t
=
ON
I
r
t
r
I
sd
2
I
t
I
t
I
g
t
g
Содержание Power Xpert PXR 10
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Страница 40: ...4 Protection settings 4 12 Residual life indicator 36 PXR Electronic trip unit 01 21 MN012005EN www eaton com ...
Страница 166: ...11 Troubleshooting 160 PXR Electronic trip unit 01 21 MN012005EN www eaton com ...
Страница 170: ...12 PXR25 Navigation menu 164 PXR Electronic trip unit 01 21 MN012005EN www eaton com ...