Chapter 4—Front Panel Operation
47
Setting the CT Ratios The circuit monitor supports two primary CT ratings: one for the phase CTs
and one for the neutral CT. The allowable range is 1 to 32,767. The factory
default for both CT secondaries is 5.
Note: The neutral CT is optional. If the circuit monitor is set up for any system type
that does not require a neutral CT, the circuit monitor ignores the neutral CT rating
(even if neutral currents are reported).
To change the primary CT ratings, complete the following steps:
1. Press the MODE button until the red LED next to [Setup] is lit.
The circuit monitor displays “ConFig”.
2. Press the PHASE [Enter] button to select the Configuration option.
The circuit monitor displays the password prompt “P - - - -.”
3. Enter the master password.
To enter the password, use the SELECT METER [Value] buttons to
increase or decrease the displayed value until it reaches the password
value. Then press the PHASE [Enter] button.
The red LED next to [CT Primary] flashes indicating that the circuit
monitor is in Configuration mode. The 3-PHASE LED also lights
indicating that the circuit monitor is displaying the 3-phase, primary
CT rating.
4. Press the SELECT METER [Value] buttons until the desired 3-phase,
primary CT rating is displayed.
5. Press the PHASE [Enter] button once.
The N (Neutral) phase LED lights, and the circuit monitor displays the
primary CT rating for the neutral CT.
6. Press the SELECT METER [Value] buttons until the desired neutral
primary CT rating is displayed.
7. Press the MODE button once.
The red LED next to [Accept] flashes. The red LED next to [CT Primary]
glows steadily.
8. To reject the new CT rating(s), press the PHASE [Enter] button once.
The circuit monitor returns to METERS mode.
9. To accept the new CT rating(s), press the UP ARROW SELECT METER
[Value] button to change from No to Yes. Then, press the PHASE [Enter]
button.
The circuit monitor restarts.
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