Electrical RCD test log summary calculator

Calculate time margins per observation and exceeded observations with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use time margins per observation and exceeded observations to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Observed RCD trip times (ms)
22,28,35
Applicable user-supplied trip limits (ms)
40,40,40
Time margins per observation (JSON)
[18,12,5]
Exceeded observations (count)
0
Largest trip time (ms)
35

Try another scenario

Observed RCD trip times (ms)
[23, 28, 35]
Applicable user-supplied trip limits (ms)
[40, 40, 40]
Time margins per observation (JSON)
[17,12,5]
Exceeded observations (count)
0
Largest trip time (ms)
35
Calculation method

Calculation method

Time margins per observation (JSON)

Compare each supplied measurement with its matching supplied limit; does not certify device type or installation.

Exceeded observations (count)

Compare each supplied measurement with its matching supplied limit; does not certify device type or installation.

Largest trip time (ms)

Compare each supplied measurement with its matching supplied limit; does not certify device type or installation.

Symbols and units
a
Observed RCD trip times (ms)
b
Applicable user-supplied trip limits (ms)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • User-supplied measurements and assumptions; Compare each supplied measurement with its matching supplied limit; does not certify device type or installation. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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