electricpy.fault.ct_saturation¶
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electricpy.fault.ct_saturation(XoR, Imag, Vrated, Irated, CTR, Rb, Xb, remnance=
0, freq=60, ALF=20)[source]¶ Electrical Current Transformer Saturation Calculator.
A function to determine the saturation value and a boolean indicator showing whether or not CT is -in fact- saturated.
To perform this evaluation, we must satisfy the equation:
\[20\geq(1+\frac{X}{R})*\frac{|I_{mag}|}{I_{rated}*CTR} *\frac{\left|R_{burden}+j*\omega*\frac{X_{burden}} {\omega}\right|*100}{V_{rated}*(1-remnanc)}\]- Parameters:¶
- XoR : float¶
The X-over-R ratio of the system.
- Imag : float¶
The (maximum) current magnitude to use for calculation, typically the fault current.
- Vrated : float¶
The rated voltage (accompanying the C-Class value) of the CT.
- Irated : float¶
The rated secondary current for the CT.
- CTR : float¶
The CT Ratio (primary/secondary, N) to be used.
- Rb : float¶
The total burden resistance in ohms.
- Xb : float¶
The total burden reactance in ohms.
- remnance : float, optional¶
The system flux remnance, default=0.
- freq : float, optional¶
The system frequency in Hz, default=60.
- ALF : float, optional¶
The Saturation Constant which must be satisfied, default=20.
- Returns:¶
result (float) – The calculated Saturation value.
saturation (bool) – Boolean indicator to mark presence of saturation.