adjacent parts in a relatively short time. The function has settable inverse operating
curves and independent alarm stages.
9.4.3
Function block
OEXPVPH
U3P*
BLOCK
RESET
TRIP
START
ALARM
IEC09000008-2-en.vsd
IEC09000008 V2 EN
Figure 138:
OEXPVPH function block
9.4.4
Signals
Table 172:
OEXPVPH Input signals
Name
Type
Default
Description
U3P
GROUP
SIGNAL
-
Three phase group signal for voltages
BLOCK
BOOLEAN
0
Block of function
RESET
BOOLEAN
0
Reset of function
Table 173:
OEXPVPH Output signals
Name
Type
Description
TRIP
BOOLEAN
General trip signal
START
BOOLEAN
General start signal
ALARM
BOOLEAN
Overexcitation alarm signal
9.4.5
Settings
Table 174:
OEXPVPH Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Off
On
-
-
Off
Operation Off / On
V/Hz>
100.0 - 180.0
%UB/f
0.1
110.0
Operate level of V/Hz at no load and rated
freq in % of (Ubase/frated)
V/Hz>>
100.0 - 200.0
%UB/f
0.1
140.0
High level of V/Hz above which tMin is
used, in % of (Ubase/frated)
tMin
0.005 - 60.000
s
0.001
7.000
Minimum trip delay for V/Hz curve
kForIEEE
1 - 60
-
1
1
Time multiplier for IEEE inverse type
curve
AlarmLevel
50.0 - 120.0
%
0.1
100.0
Alarm operate level
tAlarm
0.00 - 9000.00
s
0.01
5.00
Alarm time delay
Section 9
1MRK 502 048-UEN A
Voltage protection
276
Technical manual
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