electricpy.fault.ct_timetosat¶
- electricpy.fault.ct_timetosat(Vknee, XoR, Rb, CTR, Imax, ts=None, npts=100, freq=60, plot=False)[source]¶
Electrical Current Transformer (CT) Time to Saturation Function.
Function to determine the “time to saturate” for an underrated C-Class CT using three standard curves described by Juergen Holbach.
- Parameters:
Vknee (float) – The knee-voltage for the CT.
XoR (float) – The X-over-R ratio of the system.
Rb (float) – The total burden resistance in ohms.
CTR (float) – The CT Ratio (primary/secondary, N) to be used.
Imax (float) – The (maximum) current magnitude to use for calculation, typically the fault current.
ts (numpy.ndarray or float, optional) – The time-array or particular (floatint point) time at which to calculate the values. default=_np.linspace(0,0.1,freq*npts)
npts (float, optional) – The number of points (per cycle) to calculate if ts is not specified, default=100.
freq (float, optional) – The system frequency in Hz, default=60.
plot (bool, optional) – Control argument to enable plotting of calculated curves, default=False.