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What does an instrument transformer do?
Apr 09,2024
An instrument transformer is a device used in electrical power systems to step down high voltages and currents to levels suitable for measurement and protection equipment. There are two main types of instrument transformers:
Current Transformer (CT): This type of transformer steps down high currents in the power system to a standardized value typically suitable for measurement and protection devices. Current Transformers are commonly used to supply current inputs to ammeters, wattmeters, energy meters, relays, and other protective devices. They provide isolation and protection for metering and control circuits from the high currents present in power systems.
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Current Transformer (CT): This type of transformer steps down high currents in the power system to a standardized value typically suitable for measurement and protection devices. Current Transformers are commonly used to supply current inputs to ammeters, wattmeters, energy meters, relays, and other protective devices. They provide isolation and protection for metering and control circuits from the high currents present in power systems.
Voltage Transformer (VT) or Potential Transformer (PT): This type of transformer steps down high voltages in the power system to a standardized level suitable for measurement and protection devices. VTs are used to provide voltage inputs to voltmeters, energy meters, relays, and other protective devices. They isolate and protect measuring and control circuits from the high voltages present in power systems.