Signals; Settings - ABB RELION REX640 Technical Manual

1MRS759142 C
4.5.6.7
4.5.6.8
Table 758: PSPTUV Group settings (Basic)
Parameter Values (Range)
Start value
Operate delay time
Table 759: PSPTUV Group settings (Advanced)
Parameter Values (Range)
Voltage block value
Enable block value
Table 760: PSPTUV Non group settings (Basic)
Parameter Values (Range)
Operation
REX640
Technical Manual
generator thermally and mechanically. This kind of loss of synchronism should not be
mixed with the one between an island and the utility network. In the islanding
situation, the condition of the generator itself is normal but the phase angle and the
frequency of the phase-to-phase voltage can be different from the corresponding
voltage in the rest of the network. The island can have a frequency of its own relatively
fast when fed by a small power station with a low inertia.
PSPTUV complements other loss-of-grid protection principles based on the
frequency and voltage operation.
Motor stalling and failure to start can lead to a continuous undervoltage. The positive-
sequence undervoltage is used as a backup protection against the motor stall
condition.

Signals

Table 756: PSPTUV Input signals
Name
U3P
BLOCK
Table 757: PSPTUV Output signals
Name
OPERATE
START

Settings

Unit
0.010...1.200 xUn
40...120000 ms
Unit
0.01...1.00 xUn
0=False
1=True
Unit
1=on
5=off
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
0.001 0.500
10 40
Step Default
0.01 0.20
1=True
Step Default
1=on
Section 4
Protection functions
Description
Start value
Operate delay time
Description
Internal blocking level
Enable Internal Blocking
Description
Operation Off / On
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