![ABB RELION Series Technical Manual Download Page 393](http://html1.mh-extra.com/html/abb/relion-series/relion-series_technical-manual_3663191393.webp)
GUID-B8FF033F-EB15-4D81-8C9F-E45A8F1A6FA8 V1 EN
Figure 201:
Operation in “General EF” mode
Operation mode “Alarming EF” is applicable in all kinds of earth faults in unearthed
and compensated networks, where fault detection is only alarming. It is intended to
detect earth faults regardless of their type (transient, intermittent or restriking,
permanent, high or low ohmic). The setting
Voltage start value
defines the basic
sensitivity of the MFADPSDE function. In “Alarming EF” mode, the operate timer is
started during the following conditions.
•
Earth fault is detected by the GFC
•
Fault direction equals
Directional mode setting
•
Estimated stabilized fundamental frequency residual current exceeds the set
Min
operate current
level
The
START
output is activated once
Start delay time
has elapsed.
OPERATE
output is
not valid in the “Alarming EF” mode. Reset timer is started if any of the above three
1MRS758755 A
Section 4
Protection functions
REC615 and RER615
387
Technical Manual
Summary of Contents for RELION Series
Page 1: ... RELION PRODUCT FAMILY Grid Automation REC615 and RER615 Technical Manual ...
Page 2: ......
Page 30: ...24 ...
Page 50: ...44 ...
Page 189: ...3 18 5 Settings 1MRS758755 A Section 3 Basic functions REC615 and RER615 183 Technical Manual ...
Page 206: ...200 ...
Page 514: ...508 ...
Page 714: ...708 ...
Page 786: ...780 ...
Page 796: ...790 ...
Page 798: ...792 ...
Page 803: ...797 ...