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Chapter 6:
IQ 250/260 Meter Using the IQ 250/260
www.eaton.com
IB02601006E
6-7
Configuring CT Setting
The CT Setting has three parts:
Ct-n
(numerator),
Ct-d
(denominator), and
Ct-S
(scaling).
1. Press the
Enter
button when Ct is in the A window.
The
Ct-n
screen appears. You can either:
• Change the value for the CT numerator.
• Access one of the other CT screens by pressing the Enter button: press Enter once to access the
Ct-d
screen, twice to access the
Ct-S
screen.
NOTE: The Ct-d screen is preset to a 5 amp or 1 amp value at the factory and cannot be changed.
a.
To change the value for the CT numerator
From the Ct-n screen:
• Use the
Down
button to select the number value for a digit.
• Use the
Right
button to move to the next digit.
b.
To change the value for CT scaling
From the Ct-S screen:
Use the
Right
button or the
Down
button to choose the scaling you want. The Ct-S setting can be
1
,
10
, or
100
.
NOTE: If you are prompted to enter a password, refer to the instructions earlier in the chapter.
2. When the new setting is entered, press the
Menu
button twice.
3. The
Store ALL YES
screen appears. Press
Enter
to save the new CT setting.
Example CT Settings:
200/5 Amps:
Set the Ct-n value for 200 and the Ct-S value for 1.
800/5 Amps:
Set the Ct-n value for 800 and the Ct-S value for 1.
2,000/5 Amps:
Set the Ct-n value for 2000 and the Ct-S value for 1.
10,000/5 Amps:
Set the Ct-n value for 1000 and the Ct-S value for 10.
NOTES:
•
The value for Amps is a product of the Ct-n value and the Ct-S value.
• Ct-n and Ct-S are dictated by primary current; Ct-d is secondary current.
Press
Enter
Use buttons to set Ct-n value The Ct-d cannot be changed Use buttons to select scaling
Summary of Contents for IQ 250
Page 2: ......
Page 22: ...3 6 IB02601006E www eaton com Chapter 3 Mechanical Installation IQ 250 260 Meter...
Page 38: ...4 16 IB2601006E www eaton com Chapter 4 Electrical Installation IQ 250 260 Meter...
Page 104: ...A 6 IB02601006E www eaton com Appendix A IQ 250 260 Navigation Maps IQ 250 260 Meter...
Page 134: ...A IQ 250 260 Meter Appendix B Modbus Mapping www eaton com IB02601006E MM 28...