Signals; Settings - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.5.2.8
4.5.2.9
Table 721: PHPTUV Group settings (Basic)
Parameter
Start value
Time multiplier
Operate delay time
Operating curve type
Table 722: PHPTUV Group settings (Advanced)
Parameter
Type of reset curve
Type of time reset
780
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 719: PHPTUV Input signals
Name
U3P
BLOCK
Table 720: PHPTUV Output signals
Name
OPERATE
START

Settings

Values (Range) Unit
0.05...1.20 xUn
0.025...15.000
60...300000 ms
5=ANSI Def. Time
15=IEC Def. Time
21=Inv. Curve A
22=Inv. Curve B
23=Programmable
Values (Range) Unit
1=Immediate
2=Def time reset
1=Freeze Op timer
2=Decrease Op
timer
Type Default Description
SIGNAL - Three-phase voltages
BOOLEAN 0=False Block signal for activating the blocking mode
Type Description
BOOLEAN Operate
BOOLEAN Start
Step Default
0.01 0.90
0.005 1.000
10 60
15=IEC Def. Time
Step Default
1=Immediate
1=Freeze Op timer
1MRS759142 C
Description
Start value
Time multiplier in IEC/ANSI IDMT curves
Operate delay time
Selection of time delay curve type
Description
Selection of reset curve type
Selection of time reset
Technical Manual
REX640