that are not designed to carry flux. This will cause eddy currents to flow. These eddy
currents can cause excessive heating and severe damage to insulation and adjacent parts
in a relatively short time. The function has settable inverse operating curves and
independent alarm stages.
9.4.3
Function block
ANSI09000008-1-en.vsd
OEXPVPH (24)
V3P*
BLOCK
RESET
TRIP
BFI
ALARM
ANSI09000008 V1 EN
Figure 138:
OEXPVPH (24) function block
9.4.4
Signals
Table 172:
OEXPVPH (24) Input signals
Name
Type
Default
Description
V3P
GROUP
SIGNAL
-
Three phase group signal for voltages
BLOCK
BOOLEAN
0
Block of function
RESET
BOOLEAN
0
Reset of function
Table 173:
OEXPVPH (24) Output signals
Name
Type
Description
TRIP
BOOLEAN
Common trip signal
BFI
BOOLEAN
General pickup signal
ALARM
BOOLEAN
Overexcitation alarm signal
9.4.5
Settings
Table 174:
OEXPVPH (24) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Operation Disable / Enable
Pickup1
100.0 - 180.0
%VB/f
0.1
110.0
Operate level of V/Hz at no load and rated freq
in % of (Vbase/frated)
Pickup2
100.0 - 200.0
%VB/f
0.1
140.0
High level of V/Hz above which tMin is used, in
% of (Vbase/fn)
Table continues on next page
Section 9
1MRK 502 048-UUS A
Voltage protection
300
Technical manual
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