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NEWS CENTER

  • Properties Of Silicon Steel Sheet And On-Load Volt...

    Silicon steel sheets are a critical component in transformer design, influencing the efficiency and overall performance of the device. The properties of silicon...
    2024-02-22
  • On-Load Voltage Regulation

    No excitation voltage regulation comes into play during standby or when the transformer is not loaded. In such scenarios, the absence of an external load allows...
    2024-02-15
  • The Transformer Should Be Tested In Operation

    The temperature of a transformer is a key indicator of its health and operational status. Regulations, including the stipulation that the upper oil temperature ...
    2024-02-08
  • Scientific Selection Of Transformers And Capacity

    Choosing the optimal transformer goes beyond simply matching voltage and capacity – it involves a detailed analysis of your unique power requirements and local...
    2024-02-01

Industry Knowledge

A current transformer (CT) is an electrical device used to measure the flow of electric current in a high-voltage circuit.
CTs are used in a variety of applications, including power generation, transmission, and distribution, to monitor the flow of electrical energy and to provide information about the health and performance of the electrical system. CTs are also commonly used in protection and control systems, where they are used to detect fault conditions and trigger protective devices.
There are several types of CTs, including window-type, bar-type, and wound-type CTs. The type of CT used in a particular application depends on factors such as the magnitude of the electrical current, the required accuracy of the measurement, and the environmental conditions.
Overall, current transformers are essential components in modern electrical power systems, providing critical information about the flow of electrical energy and helping to ensure the reliability and stability of the electrical grid.
A current transformer works by converting the high current in the primary circuit to a lower, more manageable level of current in the secondary circuit. This is done by wrapping a conductor, such as a wire, around a magnetic core. The high current in the primary circuit flows through this conductor, generating a magnetic field that is proportional to the current.
The secondary circuit of the current transformer is connected to a load, such as a meter or a relay, that requires a low-level current. This secondary circuit is wound around the magnetic core, with the number of turns in the secondary winding being much higher than the number of turns in the primary winding.
As the magnetic field generated by the primary current passes through the magnetic core, it induces a current in the secondary winding. This induced current is proportional to the primary current, but at a reduced magnitude due to the ratio of turns in the primary and secondary windings.
By connecting a load to the secondary winding, the current transformer allows the flow of high-level current in the primary circuit to be measured safely and accurately. This is useful in applications where it is not possible or practical to directly measure the high current in the primary circuit, such as in power generation, transmission, and distribution systems.

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