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EMR-5000
IM02602012E
50X DEFT Measured Ground Fault Protection
Elements
50X[1] ,50X[2]
If using inrush blockings, the tripping delay of the ground current protection
functions must be at least 30 ms or more in order to prevent faulty trippings.
All ground current elements are identically structured.
For each element the following characteristics are available:
•
DEFT (definite time).
For tripping curves please refer to the “Appendix/Instantaneous Current Curves (Ground Current Measured)” section.
The ground current can be measured either directly via a zero sequence transformer or detected by a residual
connection. The ground current can alternatively be calculated from the phase currents. However, this is only possible
if the current transformers are Wye-connected.
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Содержание EMR-5000
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Страница 524: ...EMR 5000 IM02602012E Motor Protection Curves Motor Protection Curve Example 1 www eaton com 524...
Страница 525: ...EMR 5000 IM02602012E Motor Protection Curve Example 2 without RTDs www eaton com 525...
Страница 526: ...EMR 5000 IM02602012E Motor Protection Curve Example 3 with RTDs www eaton com 526...
Страница 930: ...EMR 5000 IM02602012E Real Time Clock Running Reserve of the Real Time Clock 1 year min www eaton com 930...