Selection Of Combined Instrument Transformers

Rated Parameter Matching: Select the transformer ratio based on system voltage (e.g., 10kV), current (e.g., 1000A), and load type to prevent secondary-side overload.
Accuracy Class Selection: Class 0.2S is recommended for metering applications, while Class 5P or 10P is suitable for protection applications.
Installation Environment Verification: Confirm the protection rating (e.g., IP65) for outdoor products; select stainless steel or epoxy-coated housings for corrosive environments.
Compatibility Check: Ensure that secondary-side interfaces (such as terminals and output signals) are compatible with existing metering instruments or protection devices.