3.2.1.4 Current Transformer Primary Value
The nominal Full Scale Current that will be displayed as the Line currents. This screen
enables the user to display the Line currents inclusive of any transformer ratios, the values
displayed represent the Current in Amps.
Potential Transformer secondary ranges for various Input Voltages
110V L-L (63.5V L-N)
100 - 120V L-L (57.73V - 69.28V L-N)
121 - 240V L-L (69.86V - 138.56V L-N)
241 - 480V L-L (139.14V - 277.12V L-N)
230V L-L (133.0V L-N)
415V L-L (239.6V L-N)
Valid range of PT secondary setting value is from 241.0 to 480.0.
for 415 VL-L. Please refer the table bellow for different ranges.
If value outside the range is entered, It will display “INVALID VALUE”
followed by correct range of parameter
.
LINE-NEUTRAL VOLTAGE
LINE-NEUTRAL VOLTAGE
LINE-NEUTRAL VOLTAGE
PT SECONDARY
INVALID VALUE
In case presently displayed Current Transformer Primary Value
together with the Potential Transformer Primary Value results in a
maximum power of greater than 666.6 MVA, “invalid value” will be displayed. Example:
If primary value of PT is set as 692.8kV L-L (max value) then primary value of Current is
restricted to 1157A.
The “Maximum Power” restriction of 666.6 MVA refers to 120% of nominal current and
120% of nominal voltage, i.e, 462.96 MVA nominal power per phase.
LINE-NEUTRAL VOLTAGE
LINE-NEUTRAL VOLTAGE
LINE-NEUTRAL VOLTAGE
CT PRIMARY
ENTER CT PRIMARY VALUE
Here again 0 to 9 digit input keypad is provided to set value of CT
Primary & user can confirm this value with a simple touch on “
key”. “ key” is used to multiply value by 1000.
This screen can be accessed only from system parameters list menu.
ENTER
K
18
1
2
3
4
5
6
7
8
9
DEL
ENTER
0
BACK
1
2
3
4
5
6
7
8
9
DEL
ENTER
0
K
BACK
Содержание Amik 300
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