8.4.4 Input and output signals
Table 269: OEXPVPH (24) Input signals
Name Type Default Description
I3P GROUP
SIGNAL
- Current connection
V3P GROUP
SIGNAL
- Voltage connection
BLOCK BOOLEAN 0 Block of function
RESET BOOLEAN 0 Reset operation
Table 270: OEXPVPH (24) Output signals
Name Type Description
TRIP BOOLEAN Trip from overexcitation function
PICKUP BOOLEAN Overexcitation above set trip pickup (instantaneous)
ALARM BOOLEAN Overexcitation above set alarm pickup (delayed)
8.4.5 Setting parameters
Table 271: OEXPVPH (24) Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
IBase 1 - 99999 A 1 3000 Base current (rated phase current) in A
VBase 0.05 - 2000.00 kV 0.05 400.00 Base voltage (main voltage) in kV
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)
XLeakage 0.000 - 200.000 ohm 0.001 0.000 Winding leakage reactance in primary ohms
t_TripPulse 0.000 - 60.000 s 0.001 0.100 Length of the pulse for trip signal (in sec)
t_MinTripDelay 0.000 - 60.000 s 0.001 7.000 Minimum trip delay for V/Hz inverse curve, in
sec
t_MaxTripDelay 0.00 - 9000.00 s 0.01 1800.00 Maximum trip delay for V/Hz inverse curve, in
sec
t_CoolingK 0.10 - 9000.00 s 0.01 1200.00 Transformer magnetic core cooling time
constant, in sec
CurveType IEEE
Tailor made
- - IEEE Inverse time curve selection, IEEE/Tailor made
Table continues on next page
Section 8 1MRK505222-UUS C
Voltage protection
540
Technical reference manual
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