Three-Phase Undervoltage Protection Phptuv - ABB RELION REC615 Technical Manual

Protection functions
4.4.2

Three-phase undervoltage protection PHPTUV

4.4.2.1 Identification
Function description
Three-phase undervoltage protec-
tion
4.4.2.2 Function block
Figure 212: Function block
4.4.2.3 Functionality
The three-phase undervoltage protection function 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.
4.4.2.4 Operation principle
The function can be enabled and disabled with the
corresponding parameter values are "On" and "Off".
The operation of PHPTUV can be described using a module diagram. All the modules
in the diagram are explained in the next sections.
Figure 213: Functional module diagram
428
IEC 61850 IEC 60617
identification identification
PHPTUV 3U<
Operation setting. The
1MRS758755 C
ANSI/IEEE C37.2
device number
27
REC615 & RER615
Technical Manual