Operating Procedures
RFD-200 S2™
15
4.6 Use RFD-200 S2 to Measure CT primary and Secondary Current
Perform the following steps to set the RFD-200 S2 to measure the primary and secondary
current readings
.
1. Connect the RFD-200 S2 current source through the CT primary current path.
2. Connect CT secondary winding to the RFD-200 S2 External Current Input.
3. Turn on Internal and External current display on RFD-200 S2 by pressing the RFD-
200 S2 Current switch. Internal and external current display is enable when both LEDs
are lit.
4. Select
ON
in the Control Box.
5. Raise the test current to the desired setting.
6. Observe the primary current and secondary current readings.
7. Turn test current to zero.
8. Select
OFF
in the Control Box.
Note
CT turns ratio can be calculated using the primary and secondary current readings.
Figure 12 Typical CT Turns Ratio Test Connection