Page 118 - Practical Power System and Protective Relays Commissioning
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116 Practical Power System and Protective Relays Commissioning
FIGURE 10.12 Delta-connected current transformers.
FIGURE 10.13 Excitation curve of current transformer.
transformer (OVT) are used in substations that allow a direct connection to
transducers to substation communication network via IEC 61850.
10.8.1 Advantages of Optical Instruments
Optical high-voltage CTs (Fig. 10.15) provide several benefits over conven-
tional CTs and VTs:
Better accuracy: The accuracy of measurment is better in optical
instruments.
