Guided scenario30 min· Path total 2 h 25 min

CT and PT measurement

ORIENT

What this module is for

Describe instrument transformer ratio, burden, and saturation effects on protection.

EXPERIMENT

Guided scenario in CT / PT and Relay Measurement Simulator

Load a CT and watch accuracy degrade.

Launch lab Lab details

Select a CT ratio and a modest burden, and note secondary current accuracy.
Increase burden and primary current toward saturation.
Record the point where secondary output stops tracking the primary.

CHECK

Quick retrieval check

CT saturation during a fault causes:

Secondary current to under-represent primary currentSecondary current to exceed primary current proportionallyThe ratio to increaseNo effect on relay operation

APPLY

Put it in your own words

Explain why relay engineers care about CT burden including the wiring run.

Finish this module

Still outstanding before this module can be marked complete:

Lab opened
Guided scenario steps confirmed
Knowledge check submitted
Reflection confirmed

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