Rockwell Automation 1405-M610 Operating Instructions - Manual (Page 4)

Publication 1405-IN001B-EN-P - October 2003
4 Bulletin 1405 (M610) Operating Instructions
Current Transformer Ratio Setting and Display Test
To select one of the pre-programmed standard current transformer
ratios, start with the module switched-off. Press and hold the function
“F” key while switching on the power, and for about 3 additional
seconds.
All segments of the LED displays and all the LED lamps light up one
after the other in rapid sequence to confirm the integrity of the
displays.
Press the function “F” key again to initiate the current transformer
ratio setting routine. When it is pressed once, the value “1” is
displayed on the third line of the display. This is the first in the series
of industry-standard current ratio values that are pre-programmed in
the 1405-M610. It is indicated as the nominal value of the line current
(I
nominal
).
Pressing the function “F” key repeatedly steps the displayed value
through each successive standard current transformer ratios. The
transformer ratio is I
nominal
:1 or I
nominal
:5, depending on the current
transformer secondary rating. You may select from the following
values of I
nominal
:
1 / 2
(1)
/ 5 / 10 / 15 / 20 / 25 / 30 / 40 / 50 / 60 / 75 / 80 / 100 / 125
/ 150 / 200 / 250 / 300 / 400 / 500 / 600 / 750 / 800 / 1000 / 1200 /
1250 / 1500 / 1600 / 1800 / 2000 / 2500 / 3000 / 4000.
(1) The actual value is 2.5A
A
1 5 min
Max
L 1
L1-L2
V
L-N
V
L-L
L 2
L1-L3
L 3
L2-L3
A
1 5 min
Max
L 1
L1-L2
V
L-N
V
L-L
L 2
L1-L3
L 3
L2-L3