Vanguard MCCB-250 User Manual download pdf (Page 15)

REV 2 MCCB-250 USER’S MANUAL

3.2 Measuring Current Transformer Primary and Secondary Currents

Figure 4 shows a typical connection of the MCCB-250 to a current transformer. In this

configuration, the MCCB-250 injects a test current through the CT primary. The CT secondary

current is sensed by the MCCB-250’s

[EXT CURRENT] input.

Figure 4. Typical Current Transformer Current Ratio Test Connections

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Vanguard MCCB-250 User Manual Page 15