Signals - ABB RELION Series Technical Manual

1MRS758755 A
4.4.2.7
4.4.2.8
Table 425: PHPTUV Group settings (Basic)
Parameter Values (Range)
Start value
Time multiplier
Operate delay time
Operating curve type
REC615 and RER615
Technical Manual
PHPTUV can be used to disconnect from the network devices, such as electric motors,
which are damaged when subjected to service under low voltage conditions.
PHPTUV deals with low voltage conditions at power system frequency. Low voltage
conditions can be caused by:
• Malfunctioning of a voltage regulator or incorrect settings under manual control
(symmetrical voltage decrease)
• Overload (symmetrical voltage decrease)
• Short circuits, often as phase-to-earth faults (unsymmetrical voltage increase).
PHPTUV prevents sensitive equipment from running under conditions that could
cause overheating and thus shorten their life time expectancy. In many cases,
PHPTUV is a useful function in circuits for local or remote automation processes in
the power system.

Signals

Table 423: PHPTUV Input signals
Name
U_A_AB
U_B_BC
U_C_CA
BLOCK
Table 424: PHPTUV Output signals
Name
OPERATE
START
Settings
Unit
0.05...1.20 xUn
0.05...15.00
60...300000 ms
5=ANSI Def. Time
15=IEC Def. Time
21=Inv. Curve A
22=Inv. Curve B
23=Programmable
Type Default Description
SIGNAL 0 Phase to earth voltage A or phase to phase voltage
AB
SIGNAL 0 Phase to earth voltage B or phase to phase voltage
BC
SIGNAL 0 Phase to earth voltage C or phase to phase voltage
CA
BOOLEAN 0=False Block signal for activating the blocking mode
Type Description
BOOLEAN Operate
BOOLEAN Start
Step Default
0.01 0.90
0.01 1.00
10 60
15=IEC Def. Time
Section 4
Protection functions
Description
Start value
Time multiplier in IEC/ANSI IDMT curves
Operate delay time
Selection of time delay curve type
419