What is a relay class CT?
Key characteristics of relay class current transformers include:
1. Accuracy:
Relay class current transformers typically have a lower accuracy requirement compared to metering class CTs. They are designed to operate effectively under fault conditions, where the focus is on providing enough current to trigger protective devices.
2. Saturation Characteristics:
These current transformers are engineered to saturate at a higher level, which helps to ensure that they can handle high fault currents without compromising the protection systems.
3. Burden:
The burden (load) on the secondary side is usually specified for relay class CTs to ensure they operate correctly under various conditions.
4. Applications:
Relay class current transformers are commonly used in circuit breakers, relay panels, and protective relays to safeguard electrical equipment against overloads, short circuits, and other fault conditions.
In summary, relay class CTs play a critical role in the protection of electrical systems, ensuring that protective devices receive accurate current signals to operate effectively during fault conditions.
