4.1.4.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Loss of phase, under-
current
PHPTUC 3I< 37
4.1.4.2 Function block
Figure 136: Function block
4.1.4.3 Functionality
The loss of phase, undercurrent, protection function PHPTUC is used to detect an
undercurrent that is considered as a fault condition.
PHPTUC starts when the current is less than the set limit. Operation time
characteristics are according to definite time (DT).
The function contains a blocking functionality. It is possible to block function
outputs and reset the definite timer if desired.
4.1.4.4 Operation principle
The function can be enabled and disabled with the
Operation
setting. The
corresponding parameter values are "On" and "Off".
The operation of PHPTUC can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
1MRS758755 C
Protection functions
REC615 & RER615
Technical Manual
273
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