Arc Detection Arcdsarc; Identification; Function Block; Functionality - ABB Relion SMU615 Technical Manual

1MRS758407 B
5.4
5.4.1
5.4.2
5.4.3
5.4.4
SMU615
Technical Manual

Arc detection ARCDSARC

Identification

Function description
Arc detection

Function block

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Figure 102: Function block

Functionality

The arc function ARCDSARC is used for detection of arc situations in air insulated
metal-clad switchgears caused by, for example, human errors during maintenance or
insulation breakdown during operation. The function monitors the light information
from an arc and delivers a signal, if the arc is detected.
The function contains a blocking functionality. Blocking deactivates all outputs and
resets timer.

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off". The operation counters are
cleared when Operation is set to "Off".
The operation of ARCDSARC can be described with a module diagram.
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Figure 103: Functional module diagram
The functions receives the arc light information from the sensors. Input FLT_ARC
activates the drop-off timer. Once activated, the timer remains active until the input is
deactivated or at least during the drop-off time of 25 ms. The BLOCK signal can be
used to block the arc detection output ARC_FLT_DET.
Supervision functions
IEC 61850 IEC 60617
identification identification
ARCDSARC ARCD
Section 5
ANSI/IEEE C37.2
device number
AFD
149