EMR-4000
IM02602009E
51X INV Measured Ground Fault Protection
Elements
51X[1] ,51X[2]
All ground current elements are identically structured.
For each element the following characteristics are available:
•
NINV (IEC/
XInv
);
•
VINV (IEC/
XInv
);
•
LINV (IEC/
XInv
);
•
EINV (IEC/
XInv
);
•
MINV (ANSI/
XInv
);
•
VINV (ANSI/
XInv
);
•
EINV (ANSI/
XInv
);
•
Thermal Flat;
•
IT;
•
I2T; and
•
I4T.
For tripping curves please refer to “Time Current Curves (Ground Current)” located in the Appendix.
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-4000
Страница 61: ...EMR 4000 IM02602009E Ethernet RJ45 Terminal Marking www eaton com 61 1 8 TxD TxD RxD N C N C RxD N C N C...
Страница 423: ...EMR 4000 IM02602009E Name Description Logic LE23 Out inverted Signal Negated Latched Output Q NOT www eaton com 423...
Страница 493: ...EMR 4000 IM02602009E Motor Protection Curves Motor Protection Curve Example 1 www eaton com 493...
Страница 494: ...EMR 4000 IM02602009E Motor Protection Curve Example 2 without RTDs www eaton com 494...
Страница 495: ...EMR 4000 IM02602009E Motor Protection Curve Example 3 with RTDs www eaton com 495...