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RCD and RCBO Trip Test Checker

Compare a measured RCD/RCBO trip current and time with an entered test multiplier and maximum time.

Inputs

Project inputs and assumptions

Range: 0.1–100,000 mA

Enter the exact device rated residual operating current IΔn from the device marking or datasheet.

Range: 0.01–20

Enter the test multiplier required by the selected device procedure; this is not a universal default.

Range: 0–100,000 mA

Enter the calibrated instrument's measured residual trip current for the selected test.

Range: 0–1,000,000 ms

Enter the measured operating time from the selected test procedure.

Range: 0.01–1,000,000 ms

Enter the maximum comparison time applicable to the exact device, test multiplier and current Australian procedure.

Result

Measured current minus target (mA)
-2.00
Entered test passes both comparisons (1=yes)
0
Target test current (mA)
30.00
Time margin (ms)
180.00
Result
The measured trip current or time does not meet the entered comparison basis. Review the device, test multiplier, instrument result and applicable procedure.

Formula

Calculation logic

Formula definitions and substituted values.

Before relying on the result

  • Check a measured trip test against the selected RCD test basis
  • Record current and time margins for a test report
  • Use the exact device type, rated residual current, test instrument procedure and current Australian test requirements; this is not a blanket compliance verdict.

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Use the exact device type, rated residual current, test instrument procedure and current Australian test requirements; this is not a blanket compliance verdict.