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.
4.5.5.6 Signals
Table 415: PSPTUV Input signals
Name Type Default Description
U
1
SIGNAL 0 Positive phase sequence voltage
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
Table 416: PSPTUV Output signals
Name Type Description
OPERATE BOOLEAN Operate
START BOOLEAN Start
4.5.5.7 Settings
Table 417: PSPTUV Group settings
Parameter
Values (Range) Unit Step Default Description
Start value 0.010...1.200 xUn 0.001 0.500 Start value
Operate delay time 40...120000 ms 10 40 Operate delay time
Voltage block value 0.01...1.00 xUn 0.01 0.20 Internal blocking level
Enable block value 0=False
1=True
1=True Enable Internal Blocking
Table 418: PSPTUV Non group settings
Parameter
Values (Range) Unit Step Default Description
Operation 1=on
5=off
1=on Operation Off / On
Reset delay time 0...60000 ms 1 20 Reset delay time
Relative hysteresis 1.0...5.0 % 0.1 4.0 Relative hysteresis for operation
Section 4 1YHT530004D05 D
Protection functions
492 615 series
Technical Manual
To Next Page
Loading...
Need help?
General
