4.4.1.11 Technical revision history
Table 420: PHPTOV Technical revision history
Technical revision
Change
B Step value changed from 0.05 to 0.01 for the
Time
multiplier
setting.
C Curve Sat relative max range widened from 3.0 to
10.0 % and default value changed from 2.0 to
0.0 %.
D
Added setting
Type of time reset
.
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 protection PHPTUV 3U< 27
4.4.2.2 Function block
GUID-B4A78A17-67CA-497C-B2F1-BC4F1DA415B6 V2 EN
Figure 213: 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.
Section 4 1MRS758755 A
Protection functions
414 REC615 and RER615
Technical Manual
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