9.7.2
Functionality
SEMOD171457-5 v7
Loss of voltage check LOVPTUV (27) is suitable for use in networks with an automatic system
restoration function. LOVPTUV (27) issues a three-pole trip command to the circuit breaker, if all
three phase voltages fall below the set value for a time longer than the set time and the circuit
breaker remains closed.
The operation of LOVPTUV (27) is supervised by the fuse failure supervision FUFSPVC.
9.7.3
Function block
SEMOD171785-4 v4
ANSI07000039-2-en.vsd
LOVPTUV (27)
V3P*
BLOCK
CBOPEN
VTSU
TRIP
PICKUP
ANSI07000039 V2 EN-US
Figure 359: LOVPTUV (27) function block
9.7.4
Signals
PID-3519-INPUTSIGNALS v5
Table 374: LOVPTUV (27) Input signals
Name
Type
Default
Description
V3P
GROUP
SIGNAL
-
Voltage connection
BLOCK
BOOLEAN
0
Block the all outputs
CBOPEN
BOOLEAN
0
Circuit breaker open
VTSU
BOOLEAN
0
Block from voltage circuit supervision
PID-3519-OUTPUTSIGNALS v5
Table 375: LOVPTUV (27) Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip signal
PICKUP
BOOLEAN
Pickup signal
9.7.5
Settings
PID-3519-SETTINGS v5
Table 376: LOVPTUV (27) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Operation Disabled/Enabled
VPG
1 - 100
%VB
1
70
Operate voltage in % of base voltage
VBase
tTrip
0.000 - 60.000
s
0.001
7.000
Operate time delay
1MRK 502 066-UUS B
Section 9
Voltage protection
661
Technical manual
Summary of Contents for Relion 670 series
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