Transformers and Power Supplies
Current Transformer Burden Calculator
Current Transformer Burden is a focused worksheet for cT burden. Enter values from the same operating case before comparing results.
Enter values for cT burden
Use one consistent electrical operating case for all fields.
How Current Transformer Burden works
The calculation uses VA = I²Z. Current Transformer Burden uses Secondary current, Burden impedance to report CT burden.
With the loaded values, cT burden evaluates to 5.00 VA. Preserve the baseline before changing a value.
Inputs for Current Transformer Burden
Secondary current and Burden impedance belong to Current Transformer Burden. Keep source units with secondary current.
The opening values are placeholders for testing the arithmetic. Use Transformer Voltage Regulation Calculator as the follow-up for voltage regulation.
- Secondary current
- Example entry: 5 A.
- Burden impedance
- Example entry: 0.2 Ω.
Reading the Current Transformer Burden result
This output represents Current Transformer Burden. For apparent power, use Transformer VA Rating Calculator.
Finish the selection with standard sizes, operating limits, and transient review.
Measurement and units
Check component ratings, isolation requirements, temperature, waveform, and manufacturer limits. Check prefixes on secondary current.
Scenario differences are meaningful only with consistent units and observation points.
Limits of this calculation
Include leads and connected instruments.
This equation represents one relationship rather than a full circuit simulation. Unentered effects remain outside Current Transformer Burden. Compare this result with Flyback Transformer Calculator when ideal secondary voltage is also needed.
A useful Current Transformer Burden comparison
Save the initial cT burden before adjusting secondary current. A low and high case is more informative than adding an unexplained safety factor after the calculation. If the next question concerns ideal boost output, open Boost Converter Calculator.
Document the alternate secondary current source.
Questions about Current Transformer Burden
What does Current Transformer Burden calculate?
It evaluates cT burden from secondary current and burden impedance using the displayed formula.
Can Secondary current be zero?
For Current Transformer Burden, measure any zero secondary current directly.
Why can ct burden differ from measurement?
Include leads and connected instruments. Recheck secondary current.