ABB Relion REC615 - Three-Phase Undervoltage Protection PHPTUV

4.4.2 Three-phase undervoltage protection PHPTUV
4.4.2.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase undervoltage protec-
tion
PHPTUV 3U< 27
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 Operation setting. 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
Protection functions
1MRS758755 C
428 REC615 & RER615
Technical Manual