electricpy.fault.thermaltime

electricpy.fault.thermaltime(In, Ibase, tbase)

Thermal Time Limit Calculator.

Computes the maximum allowable time for a specified current In given parameters for a maximum current and time at some other level, (Ibase, tbase).

Uses the following formula:

\[t_n=\frac{I_{base}^2*t_{base}}{I_n^2}\]

Parameters:

• In (float) – Current at which to calculate max time.

• Ibase (float) – Base current, at which maximum time tbase is allowable.

• tbase (float) – Base time for which a maximum allowable current Ibase is specified. Unitless.

Returns:

tn – Time allowable for specified current, In.

Return type:

float