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Traditional and Electronic Current Transformers Theory Testing Chapter | 10 117
FIGURE 10.14 Methods to determine knee point voltage as per both ANSI/IEEE and IEC
methods.
FIGURE 10.15 Optical high-voltage current transformer.
Output bandwidth: The bandwidth of the optical instruments is wider
than conventional one.
Combined equipment: One compact unit includes both the CT and the VT.
Environmentally friendly: There is no open circuit hazard for secondary
winding of the CT, or Ferro resonance risks.
Applications: As an OCT uses light to measure the magnetic field sur-
rounding a current carrying conductor, an optical measurement of current
