Application of CT clamp meter transformer in high-voltage power distribution systems

—Taking HEYI CT clamp meter transformer as an example

In high voltage power distribution systems I use measurement I use operation monitoring and I use fault early warning to keep the power grid safe and stable. As power distribution systems become smarter and run online I see clamp, on transformers called Clamp CTs in high voltage and medium voltage power distribution. Clamp CTs let me install without stopping the system. Clamp CTs are safe, reliable, flexible and convenient.

HEYI Electric is a manufacturer of transformers. I have used HEYI Electrics clamp-on transformers. I see that clamp-on current transformers give big use in the high‑voltage power distribution systems.

1.Core Requirements of Current Transformers in High-Voltage Power Distribution Systems

I work with high-voltage power distribution systems such, as distribution networks, ring units, prefabricated substations and switching stations. In high-voltage power distribution systems current transformers mainly do the following functions:

Current measurement and monitoring: providing accurate current signals for electricity meters, monitoring modules, and smart terminals.

Fault detection and location: Supports grounding fault and short-circuit fault indication and analysis.

Operational status assessment: auxiliary load analysis, energy management and equipment operation and maintenance

Uninterruptible power supply (UPS) upgrades and expansions: meeting the upgrade needs of existing power distribution systems

I have seen that traditional, through-core current transformers have limits. Traditional through-core current transformers require installation during power outages. Traditional through-core current transformers occupy a lot of space. Traditional through-core current transformers bring high construction risk.

Those are the situations where clamp-on transformers have the advantage. Clamp-on current transformers allow installation without shutting down power. Clamp-on current transformers occupy space. Clamp-, on current transformers reduce construction risk.

2.Technical Advantages of Clamp-on Current Transformers

Clamp-on current transformers have a core that lets you clamp them directly onto the outside of cables or conductors. Clamp on current transformers do not require you to disconnect the circuit. Clamp-, on current transformers give these benefits:

Uninterrupted power supply installation (Hot Installation)

I notice high construction safety lowers the operation and maintenance risks. I notice high construction safety keeps the site safer, for the workers. High construction safety saves time.

Small size, suitable for confined spaces

Suitable for renovation projects and intelligent upgrades

So clamp‑on current transformers are a choice, for monitoring. Clamp‑on current transformers also help with fault detection, in the high‑voltage power distribution systems.

3. Product Features of Hobby Clamp-Type Current Transformers

Take HEYIs CCT series CT clamp on transformer as an example. HEYIs CCT series clamp-on transformer is made for monitoring the power distribution system and detecting faults. HEYIs CCT series clamp-on transformer has these features:

（1）Compact design, suitable for high-voltage power distribution spaces.

The Heyi clamp-on transformer has a design. The HEYI CT clamp-on transformer can be installed flexibly in:

Ring Main Unit (RMU)

High-voltage cable branch box

Switchgear and cable rooms

I can easily deploy the equipment.  

The equipment fits inside high-voltage power distribution equipment rooms where space’s limited.

（2）Safe low-voltage output, suitable for online monitoring.

The product includes a precision resistor. The precision resistor can provide:

0–250 mA

I have found that low voltage signal outputs, like 0.333 V or 0 to 1 V keep the side safe. I also see that low voltage signal outputs let me connect directly to fault indicators monitoring terminals or data acquisition systems.

（3）Stable and reliable, suitable for complex working conditions.

The HEYI clamp on current transformer works with 50/60 Hz power frequency applications. The HEYI clamp-on current transformer meets the long term operation needs of power distribution systems. The HEYI clamp-on transformer is suitable, for:

• High humidity
• Strong electromagnetic environment
• Indoor and outdoor power distribution equipment

（4）Easy installation, reducing operation and maintenance costs.

The clamp-type structure design cuts a lot:

• Power outage losses
• manual construction time
• Its low complexity in post-maintenance

In my view the design works well for existing high-voltage power distribution system renovation projects. The design fits the needs of existing high-voltage power distribution system renovation projects.

4.Typical Applications of Hobby Clamp-Type Current Transformers in High-Voltage Power Distribution Systems

（1）High-voltage cable fault indication system

When I work with cables or overhead lines I use the Heyi clamp-on transformer together with:

• Ground fault indicator
• Short circuit fault indicator

The system gives real time detection of fault. Real time detection of fault current helps maintenance personnel locate faulty sections fast. Fast location of sections cuts power outage time a lot. I have seen how fast location of sections reduces power outage time.

（2）Online monitoring of ring main units and switchgear

Clamp-on current transformers are useful. Clamp-, on current transformers can fit in the ring units and the high-voltage switchgear, for:

• Line current monitoring
• Load variation analysis
• Operational status data collection

I think the solution does not need changes, to the structure. I think the solution is ideal, for upgrading the power distribution automation.

（3）Energy monitoring and energy harvesting devices

I have found that the gain clamp current transformer can also be used in places.

• High-voltage power distribution side energy harvesting system
• Energy consumption monitoring terminal
• Smart sensing and IoT devices

The device provides a signal source, for making the power distribution system intelligent. The reliable current signal source lets the power distribution system work smarter. The reliable current signal source is a part of the power distribution system.

（4）Why choose HEYI clamp-on current transformers

Selecting clamp-on current transformers in high-voltage power distribution systems is not only a technical choice but also a comprehensive consideration of safety and efficiency. HEYI (合益) leverages:

I have manufacturing experience that focuses on transformers.

Product design optimized for power distribution systems

Stable and reliable electrical performance

We provide clamp-on transformer solutions. The clamp-, on current transformer solutions serve the high voltage power distribution systems. The clamp-, on current transformer solutions reach the customers worldwide.

The power distribution system is getting smarter and more digital. Because of that clamp-on current transformers will be used more in high-voltage power distribution. Hoyi clamp-on current transformers have safety, flexibility and high adaptability. Hoyi clamp-on current transformers give support for high-voltage power distribution monitoring. Hoyi clamp-on current transformers give support for fault indication. Hoyi clamp-on current transformers give support, for operation and maintenance management.

I need clamp-on transformer solutions, for the high-voltage power distribution systems. After testing options I find that HEYI is a partner for clamp-on current transformer solutions for the high-voltage power distribution systems. I recommend HEYI for anyone who needs clamp-on transformer solutions, for the high-voltage power distribution systems.

Compay：HEYI Electrical Co., Ltd.

Brand: HEYI/ASCT

Contact: Bethy

E-mail: heyi@heyiele.com             

Tel: 86-13968747975

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