High-voltage Current Transformer

Overview of High-Voltage Current Transformer

High-voltage current transformers (CTs) are essential instrument transformers used in electrical power systems to measure and monitor high currents safely. They convert high current levels in transmission lines into proportional low current signals that can be used by meters, protection relays, and monitoring equipment.

These transformers are widely used in power plants, electrical substations, and high-voltage transmission networks, ensuring accurate current measurement and reliable protection of power system equipment.

How High-Voltage Current Transformers Work

High-voltage current transformers operate based on electromagnetic induction, converting large primary currents into smaller, standardized secondary currents.

Component	Function
Primary Conductor	Carries the high current from the power system
Magnetic Core	Transfers magnetic flux efficiently
Secondary Winding	Produces reduced current for measurement
Insulation System	Ensures safe operation in high voltage environments
Protective Housing	Protects internal components

The typical secondary current output is 1A or 5A, which can be safely measured by monitoring devices.

Types of High-Voltage Current Transformers

• Oil-Immersed Current Transformer – Used in outdoor high-voltage substations.
• Cast Resin Current Transformer – Suitable for indoor switchgear systems.
• Ring Type Current Transformer – Installed around conductors for measurement.
• Outdoor Instrument Transformer – Designed for high-voltage transmission networks.

Advantages of High-Voltage Current Transformers

• Accurate Current Measurement for power system monitoring
• Improved Protection for electrical equipment and circuits
• High Insulation Strength for high-voltage applications
• Reliable Operation in substations and transmission systems
• Compact and Durable Design

Company Profile

Luoyang Datang Energy Technology Co., Ltd. is a high-tech enterprise integrating R&D, manufacturing, and supply of power equipment and renewable energy solutions. Specializing in transformers, new energy components, distribution cabinets, and inverters, we have expanded our portfolio to include solar power systems, energy storage solutions, and air source heat pumps. With technological innovation as our core, we focus on creating high-reliability and high-performance power and energy efficiency solutions to serve global customers. Through a strict quality control system and international standard certification, we continuously deliver excellent products that empower our customers to build safe, stable, and sustainable power systems.

If you want a high-quality, high-voltage current transformer supplier, we invite you to contact us or inquire about related products.

Payment Methods for High-Voltage Current Transformer

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Shipping of High-Voltage Current Transformer

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FAQs of High-Voltage Current Transformer

1. What is a current transformer (CT)?

A current transformer is an instrument transformer used to measure high electrical currents safely.

2. Where are high-voltage CTs used?

They are commonly used in substations, power plants, and electrical transmission systems.

3. What is the standard secondary current of a CT?

Most current transformers provide a 1A or 5A secondary current output.

4. Why are CTs important in power systems?

They enable accurate measurement and protection of high-voltage electrical networks.

5. Can CTs be used for protection relays?

Yes, current transformers are widely used in protection and metering systems.