Improve electrical safety and energy monitoring with advanced current detection solutions.

The rapid expansion of renewable energy and electric vehicle infrastructure is transforming modern electrical systems. Across North America, commercial buildings, industrial facilities, solar power plants, and electric vehicle charging stations rely on advanced power electronics, energy storage systems, and intelligent energy management platforms.

However, these technologies also create new problems:

• How do engineers detect dangerous leakage currents in power electronic devices?
• How can a photovoltaic system control energy production without disrupting existing electrical circuits?
• How can electric vehicle charging systems improve electrical safety without compromising operational safety?
• How can commercial buildings upgrade their energy monitoring systems without costly electrical changes?

The solution lies in combining residual current monitoring technology with sensors based on pluggable current transformers.

HEYI Electrical provides current sensing solutions for modern power systems, including the HYCA-07-PD residual current monitor and the CCT-24 plug-in split-core current transformer, helping engineers improve electrical safety, power control, and system reliability.

1.In photovoltaic systems and electric vehicles, the need for electrical monitoring is increasing.

The evolution of modern electrical systems

Traditional electrical systems rely primarily on voltage and current measurements. However, modern energy systems are increasingly using power electronics:

• Solar photovoltaic inverter
• Battery Energy Storage System (BESS)
• Charging station for electric vehicles
• Current transformer
• Intelligent power distribution system
• Building Energy Management System (BEMS)

While these devices improve energy efficiency, they also create more challenging electrical conditions.

Unlike conventional AC loads, power electronic devices can generate the following:

• AC leakage current
• continuous short-circuit current
• High frequency interference

If abnormal leakage currents are not detected in time, this may lead to the following consequences:

• Risk of electric shock
• Damage to property
• Unexpected stop
• Fire hazard
• Decreased system reliability

Therefore, modern energy systems require advanced energy consumption monitoring solutions.

 

2.Why is residual current monitoring important for EV chargers and power inverters?

Understanding leakage currents in electric vehicle charging systems.

Electric vehicle charging systems include AC-to-DC converter circuits.

Typical electric vehicle charging systems include:

• Alternative energy grid
• ↓
• AC/DC converter
• ↓
• Battery power supply
• ↓
• vehicle

During normal operation, a small leakage current may occur.

However, deterioration of the insulation characteristics or failure of the component may lead to the following consequences:

• Alternating short-circuit current
• Continuous smoothing of residual current
• Pulsed continuous leakage current

Traditional protective devices may not be able to effectively detect all types of leakage currents.

For this reason, EV charging systems increasingly need to control residual current, which is AC/DC sensitive.

3.HYCA-07-PD: Solution for monitoring residual current in electric vehicle chargers and power electronic devices.

The HYCA-07-PD residual current monitor is designed for applications requiring reliable leakage current detection, and is particularly suitable for EV charging systems and power converters.

According to the technical specifications, HYCA-07-PD is intended for the following purposes:

• Ground fault detection
• Charging station for electric vehicles
• Converter leakage current detection

It addresses the requirements for residual current monitoring in relation to the following aspects:

• IEC 62752
• Application of IEC 62955 RDC-PD
• Main characteristics of HYCA-07-PD

 

1.Sensitive detection of residual AC/DC current

Modern electric vehicle chargers can generate various forms of leakage current.

The HYCA-07-PD device is designed to monitor various short-circuit current conditions, including:

Alternating short-circuit current

pulsed continuous residual current

Continuous smoothing of residual current

This helps to increase the reliability of protection of power electronic systems.

 

2.Compact PCB assembly

For electric vehicle charger manufacturers and power electronics companies, available installation space is critical.

HYCA-07-PD Specifications:

• compact structure
• Printed circuit board design
• Simple +5V power supply
• High and low level output signals

This makes integration easier:

• Charging module for electric vehicles
• Current transformer
• energy storage system

 

3.Integrated self-diagnosis function

Video surveillance systems require reliable functional testing.

The HYCA-07-PD system has a self-diagnostic function that allows you to check the functionality of the monitoring system before loading.

This feature is especially useful for:

• public charging stations for electric vehicles
• commercial loading equipment
• automatic charging system

 

4.Why are CT probes with separate contacts ideal for solar energy monitoring?

Problems with existing solar power plants

There are currently thousands of commercial solar power plants operating in North America.

Many infrastructure facilities are already operational:

Distribution panel

Switchgear

solar inverter

electricity meter

When installing an energy monitoring system, engineers often face the following problem:

To install a conventional CT scanner, the following requirements must be met:

• Disconnect the cable.
• Turn off the power.
• Modernization of existing lines
• Downtime costs are high for systems already in operation.

This is the main advantage of current transformers with separate output.

 

5.CCT-24 clamp-on type current transformer for power monitoring.

The CCT-24 is a compact split-core current transformer with a clamp-on mounting system designed for easy installation in confined spaces.

Unlike conventional closed-loop current transformers, the split-core design allows engineers to install current transformers near existing lines without interrupting the circuit.

Advantages of CCT-24

1.Easy to modify and install.

This mounting design allows installation without affecting existing electrical systems.

Typical applications include:

• Monitoring of photovoltaic solar systems
• Monitoring energy consumption in buildings
• Distribution box monitoring
• Intelligent energy management system

 

2.Compact design, ideal for small spaces.

In North America, space for installing many junction boxes is limited.

The design features of the CCT-24 are as follows:

• A little
• Clip structure
• Cabling is simple.

Apply:

• Commercial building
• industrial enterprises
• Renewable energy systems

 

3.Safe output voltage of the monitoring system

The CCT-24 model offers a low voltage output option for increased safety:

• 0.333 V
• 1B
• 0-250 mA

This provides integration with the following systems:

• electricity meter
• data collection system
• EMS platform
• Equipment for food quality control

 

6.Combination of residual current monitoring and current measurement for smart power systems.

Modern energy systems require two different types of information.

electrical safety control

questions:

Does dangerous leakage current occur?

Solution:

HYCA-07-PD

Energy measurement

questions:

What is the current flow in the system?

Solution:

CCT-24

Together, these technologies form a comprehensive current detection solution:

• Solar PV system/electric vehicle charger
• Current monitoring

 

HYCA-07-PD CCT-24

Residual energy

Current measure

Detection and monitoring

 

Energy Management Platform

 

7.Application in the North American market

8.Commercial solar photovoltaic systems

Application areas:

• Solar panels on the roof
• industrial solar energy systems
• Microgrid systems

Recommended products:

• CCT-24 for energy monitoring
• HYCA-07-PD for safety in power electronics.

Keywords:

Solar photoelectric current sensor

Split core scanner for solar energy monitoring.

solar radiation monitoring system

 

2.Charging infrastructure for electric vehicles

Application areas:

• public charging stations
• Charger for commercial electric vehicles
• vehicle fleet payment system

Recommended products:

HYCA-07-PD

Keywords:

• Residual current sensor of electric vehicle charger
• continuous leakage current detection
• Residual current monitoring according to IEC 62955.

 

3.Battery energy storage system

Energy storage systems contain complex energy conversion devices.

Potential risks:

• DC leakage
• Insulation failure
• The current situation is abnormal.

Highly recommended:

HYCA-07-PD + CCT-24

4.Building energy management system

Commercial buildings increasingly require:

• Real-time energy consumption monitoring
• Load analysis
• Energy consumption optimization

The CCT-24 system offers a practical solution for modernization in the following areas:

• office building
• Shopping mall
• data processing center
• industrial enterprise

8.How to choose the right energy monitoring solution?

Application	Recommended solution
Leakage current protection for electric vehicle chargers.	HYCA-07-PD
DC leakage detection	HYCA-07-PD
solar energy monitoring	CCT-24
Energy saving in buildings	CCT-24
Project to update the monitoring system	CCT-24
solar-powered electric vehicle charging system	HYCA-07-PD + CCT-24

9.Future trends: Safer and smarter electrical systems.

The future direction of energy infrastructure development is as follows:

• Connecting to the renewable energy grid
• Intelligent monitoring
• electrification
• Digital energy management

Modern detection technologies will play a key role in the following areas:

• Photovoltaic solar system
• Network of charging stations for electric vehicles
• energy storage system
• Smart building

By combining residual current monitoring with accurate current measurement, engineers can achieve the following goals:

• Improved electrical safety
• Increased system reliability
• Improving energy efficiency

The most convenient system maintenance.

In conclusion

With the continued expansion of renewable energy and electrification in North America, energy monitoring is becoming increasingly important.

The HYCA-07-PD residual current monitoring unit helps engineers improve the safety of electric vehicle chargers and power electronic systems by detecting AC and DC sensitive leakage currents.

The CCT-24 split-core embedded current transformer is a practical solution for solar PV system monitoring, energy management and upgrades without interrupting existing electrical circuits.

Together, these technologies form the foundation for the next generation of safer, more efficient and intelligent energy systems.

Compay：HEYI Electrical Co., Ltd.
Brand: HEYI/ASCT
Contact: Bethy
E-mail: heyi@heyiele.com             
Tel: 86-13968747975

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