LB6-110kV Current Transformer is a high-voltage current transformer designed for current measurement, energy metering and relay protection in 110kV AC power systems. Suitable for 50Hz and 60Hz electrical networks, this transformer provides stable performance and high measurement accuracy for substations, power transmission systems and industrial power facilities.
With advanced oil-immersed insulation technology and a fully sealed structure, LB6-110kV Current Transformer delivers excellent electrical insulation, reliable operation and long service life under demanding high-voltage working conditions.
The LB6-110kV series current transformer adopts a professional design for high-voltage power applications. The product model represents its key technical features:
The transformer is equipped with multiple secondary windings, including one metering winding with accuracy class 0.5 and three protection windings. The multiple secondary winding configuration enables reliable current measurement and protection functions for different power system requirements.
LB6-110kV Current Transformer supports multiple current ratio configurations by changing the connection method of the external connecting piece on the oil conservator. When connected in series, the current ratio is a/c, while parallel connection provides a current ratio of 2*a/c.
This flexible design allows the same transformer model to adapt to different operating requirements, reducing equipment replacement costs and improving application versatility in high-voltage power systems.
The LB6-110kV Current Transformer is designed to operate reliably under various environmental conditions:
For applications with lower temperatures or special environmental requirements, customized solutions can be discussed with the manufacturer according to project conditions.
The LB6-110kV Current Transformer adopts an oil-immersed structure consisting of a fuel tank, transformer body, porcelain bushing, oil conservator and expander. The transformer body is immersed in insulating oil and contains primary and secondary windings designed for stable electrical performance.
The primary winding adopts a U-shaped structure. The main insulation system uses capacitive oil-paper insulation technology, with multiple capacitive screens arranged between insulation layers. The inner screen connects to high potential while the outer screen is grounded, improving insulation performance and operational safety.
The primary winding conductor is divided into two sections with four terminals connected to the oil conservator. The current ratio can be adjusted through external wiring changes, providing flexible configuration options.
The secondary winding is installed on a support below the primary winding. All secondary terminals and external screen terminals are connected to the junction box on the transformer tank, ensuring convenient installation and maintenance.
The LB6-110kV Current Transformer features a practical connection design with external wiring clamps installed at the bottom of the junction box. Grounding bolts are provided on both the junction box and fuel tank, allowing secure grounding of the secondary winding and the complete transformer structure.
The transformer adopts reducing polarity characteristics. When primary current flows from P1 to P2, secondary current flows through the external circuit from S1 to S2 or S3, ensuring accurate current transmission for measurement and protection systems.
Due to its high-voltage performance and reliable protection functions, LB6-110kV Current Transformer is widely used in:
LB6-110kV Current Transformer combines accurate measurement, reliable insulation, flexible current ratio design and low-maintenance operation. Its fully sealed oil-immersed structure ensures stable performance in high-voltage environments, making it a dependable solution for modern power systems requiring safe and continuous operation.
