Ziegler mfm 3480, User Manual

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3.2.1.3 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.
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
The “Maximum Power” restriction of 666.6 MVA refers to 120% of nominal current and
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 “
This screen can be accessed only from system parameters list menu.
key”. “ key” is used to multiply value by 1000.
ENTER
K
120% of nominal voltage, i.e, 462.96 MVA nominal power per phase.
restricted to 1157A.
17
1 2 3
4 5 6
7 8 9
DEL
ENTER
0 K
BACK
.
Valid range of T primary setting value is from C 1 to 9999. If value
outside VALUE” the range is entered, It will display “INVALID
followed by correct range of parameter.
LINE-NEUTRAL VOLTAGE LINE-NEUTRAL VOLTAGE LINE-NEUTRAL VOLTAGE CT PRIMARY
INVALID VALUE
1 2 3
4 5 6
7 8 9
DEL
ENTER
0 K
BACK
.