52 Program features
The inverter output current limitation curve is based on the temperature.
Figure 21. Inverter output current limitation curve
Both the analog inputs software feature has the following set of parameters:
Tabel 4: Customer interface analog inputs configuration
For example, if MV transformer oil temperature signal, which uses a Nokeval HTB230
0/200 current sensor is connected to the Analog input X20.11 - 12 connector, configure the
following parameters:
Parameter type Selection list 0X20
terminal
Source Zero [0]
Analog input X20.9 - 10
Analog input X20.11 - 12
Spare AI3 Not supported
in this release
Spare AI4
Spare AI5
Temperature Shows the measured temperature
Temperature at 4 mA Temperature sensor configuration. A linear scaling is
assumed to be between the two current values.
Temperature at 20 mA
Temperature warning limit Temperature limits that triggers events
Temperature fault limit
Current limit temperature 1 - 3 See T
1
- T
3
in Inverter output current limitation curve.
Current limit current 1 - 2 See I
1
- I
2
in Inverter output current limitation curve.
Parameter type Instruction
Source Set parameter 177.63 Transformer temperature 2 source =
Analog input X20.11 - 12 [2]
Temperature at 4 mA Set parameter 177.65 Transformer temperature 2 at 4 mA current = 0°
Temperature at 20 mA Configure current limitations of the temperature and the warnings and
faults.
Rest of the parameters Set parameter 177.30 Transformer overpressure failure logic to active low
or high.
I
lim
(A)
I
1
I
2
0 A
T
1
T
2
T
3
T (°c)
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