ABB RELION 620 Series Technical Manual page 661

1MRS757644 F
4.5.4.7
4.5.4.8
Table 607: PHAPTUV Group settings (Basic)
Parameter Values (Range)
Start value
Time multiplier
Operate delay time
Operating curve type
620 series
Technical Manual
PHAPTUV can be used to disconnect damaged devices from the network. These are,
for example, 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 the following issues.
• Malfunctioning of a voltage regulator or wrong settings under manual control
(symmetrical voltage decrease)
• Overload (symmetrical voltage decrease)
• Short circuits, often as phase-to-earth faults (unsymmetrical voltage decrease)
PHAPTUV prevents sensitive equipment from running under conditions that could
cause overheating and thus shorten their life time expectancy. In many cases,
PHAPTUV is a useful function in circuits for local or remote automation processes in
the power system.
Signals
Table 605: PHAPTUV Input signals
Name
U_A_AB
BLOCK
Table 606: PHAPTUV 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
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
655