Summary:A current transformer (CT) is an electrical device that is used to measure electrical current in an ...
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current transformer (CT) is an electrical device that is used to measure electrical current in an alternating current (AC) power system. It is designed to step down the current level to a more manageable level, typically to a level that can be safely handled by measurement and protection devices.
A current transformer consists of a primary winding, which is connected in series with the electrical current to be measured, and a secondary winding, which is connected to the measuring or protection device. The current flowing in the primary winding induces a current in the secondary winding, which is proportional to the current flowing in the primary winding. The ratio of the primary current to the secondary current is known as the current transformation ratio and is typically fixed for a given CT.
There are different types of current transformers, such as:
Window type: These types of CTs have a hole (window) in the middle of the core, the primary conductor is passed through this hole and the secondary winding is wrapped around the core.
Bar type: These types of CTs have a primary conductor passing through a cylindrical core and the secondary winding is wrapped around it.
Wound type: These types of CTs have both primary and secondary winding on the same core.
Current transformers are used in a variety of applications, such as measuring the current in electrical power systems, metering and protecting equipment, and monitoring and control of power generation and distribution systems. They are also often used in conjunction with voltage transformers (VT) to provide a complete set of electrical measurements.
Overall, a current transformer (CT) is a device that is used to measure electrical current in an alternating current (AC) power system. It steps down the current level to a more manageable level and consists of a primary winding and a secondary winding. There are different types of CTs and they are used in a variety of applications such as measuring, metering, protection, monitoring, and control of power systems. They are also often used in conjunction with voltage transformers (VT) to provide a complete set of electrical measurements.
Mainly used in metering,serving as current sampling tool or the current measuring tool for general industrial instruments.
High Accuracy, UP TO 0.05 class, DC Immunity, Anti-Magnetic.
Standard: GB1208 ‘Current Transformer’
JB/T10665 ‘Miniature current transformer’
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