This post details about What is core 1 and core 2 in CT?, What is 2 core CT?, What is S1 and S2 in CT?
What is core 1 and core 2 in CT?
In a current transformer (CT), “Core 1” and “Core 2” generally refer to the two halves of the transformer core around which the main clamp passes. These cores are responsible for inducing a voltage in the secondary winding proportional to the current flowing through the primary conductor. The main conductor, usually a power cable or bus bar, passes through the central opening formed by the two cores. By surrounding the primary conductor in the core, the CT provides accurate and reliable current measurement without the need for direct contact with the conductor.
What is 2 core CT?
A “2 core CT” refers to a current transformer with two separate cores, each with its own primary winding. This configuration allows the measurement of current in two separate conductors or circuits simultaneously. Each core operates independently, providing accurate current measurement for its respective circuit. 2 Basic CTS are commonly used in applications where multiple current measurements are required, such as in three-phase electrical systems or multi-circuit monitoring applications.
What is S1 and S2 in CT?
In the context of CTS, “S1” and “S2” generally refer to the secondary winding terminals of the transformer. The secondary winding of a CT is connected to measuring or monitoring equipment, such as muniters, relays or meters, through these terminals. The voltage induced in the secondary winding is proportional to the primary current and is used to provide a scale representation of the primary current for measurement or protection purposes.
The main difference between 1A and 5A CTS is their secondary current rating. A 1A CT has a secondary current rating of 1 amp, while a 5A CT has a secondary current rating of 5 amps. The choice between 1A and 5A CTS depends on the specific application requirements, including the sensitivity of the CT-related measuring or protection devices. Typically, 1A CTS are used in applications where higher accuracy and resolution are required, while 5A CTS are more commonly used in industrial and utility applications due to their standardized secondary current rating and compatibility with devices standard instrumentation and protection.
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