ABB RELION Series, Technical Manual

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GUID-FDF97C09-E155-422A-8CBC-CD8B3A19101E V1 EN
Figure 203: Operation in “Intermittent EF” mode, Peak counter limit = 3
Blocking logic
There are three operation modes in the blocking functionality. The operation modes
are controlled by the
BLOCK
input and the global setting Configuration/System/
Blocking mode which selects the blocking mode. The
BLOCK
input can be controlled
by a binary input, a horizontal communication input or an internal signal of the
protection relay's program. The influence of the
BLOCK signal activation is
preselected with the global setting Blocking mode .
The Blocking mode setting has three blocking methods. In the "Freeze timers" mode,
the operation timer is frozen to the prevailing value. In the "Block all" mode, the whole
function is blocked and the timers are reset. In the "Block OPERATE output" mode,
the function operates normally but the
OPERATE
output is not activated.
Section 4
1MRS758755 A
Protection functions
390 REC615 and RER615
Technical Manual