def burdenVAgtc(self,VA,pf,Isec):
"""
calculates the complex impedance of a burden from its VA, PF and secondary current
"""
if pf >= 0: #check sign convention for PF, '-'for capacitive
multiplier = 1.0
else:
multiplier = -1.0
magZ = VA/Isec**2
phi = GTC.acos(pf)
Z = magZ*GTC.cos(phi)+ multiplier*1j*magZ*GTC.sin(phi)
return Z
def burdenZgtc(self,Z,Isec):
"""
returns a burden in the form of VA and PF based on its impedance
uses GTC functions to cope if Z is a GTC ucomplex
"""
if Z.imag >= 0: #check sign convention for PF, '-'for capacitive
multiplier = 1.0
else:
multiplier = -1.0
phase = GTC.phase(Z)
# phi = cmath.phase(Z)
PF = GTC.cos(phase)*multiplier
magZ = GTC.magnitude(Z)
VA = magZ*Isec**2
return (VA, PF)