4.5.2 Three-phase undervoltage protection PHPTUV
4.5.2.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase undervoltage protection PHPTUV 3U< 27
4.5.2.2 Function block
GUID-B4A78A17-67CA-497C-B2F1-BC4F1DA415B6 V1 EN
Figure 251: Function block
4.5.2.3 Functionality
The three-phase undervoltage protection PHPTUV is used to disconnect from the
network devices, for example electric motors, which are damaged when subjected
to service under low voltage conditions. PHPTUV includes a settable value for the
detection of undervoltage either in a single phase, two phases or three phases.
The function contains a blocking functionality. It is possible to block function
outputs, timer or the function itself, if desired.
4.5.2.4 Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of the three-phase undervoltage protection can be described using a
module diagram. All the modules in the diagram are explained in the next sections.
GUID-21DCE3FD-C5A0-471A-AB93-DDAB4AE93116 V1 EN
Figure 252: Functional module diagram
Section 4 1YHT530004D05 D
Protection functions
474 615 series
Technical Manual
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