1. Why are engineers faced with the problem of current leakage in practical application?
1.1 Errors in the field and not within the project
In Brazilian projects, it often happens that the system works well on paper, but on the site, failures occur that are manifested mainly by:
● Charger for electric vehicles
● Photoelectric system
● Industrial panel
In most cases, the problem lies in the limitations of the measurement system in the absence of an appropriate residual current monitoring device.
2. Annex 1: Charger for electric vehicles
2.1 Why do electric vehicles need more advanced testing?
In the current transformers for EV chargers, the current leak can contain constant current components even at very low levels.
This can lead to:
● Lack of differential protection
● User risk
● Not compliant with IEC 62955
2.2 HYCA - 01 How to solve the problem
HYCA-01 as special residual current control device for electric vehicles:
● Variable current + constant current detection
● typical ignition: 30mA AC/~4.5mA DC
● Digital Output System
Directly addresses the need for how to detect DC leakage current in EV chargers.
3. Application 2: Photoelectric (solar) systems
3.1 Typical problems in the field
In solar inverter current transformers, leakage current may appear gradually for the following reasons:
● Aging of the cable
● Denial of isolation
● Environmental conditions
Without constant monitoring, these errors will be ignored.
3.2 Solutions for continuous monitoring
Paragraph HYCA-01:
● Constant current output PWM (0 - 30 mA)
● Accuracy ~±0.5mA
Defect detection before damage or fire
4. Annex 3 : Industrial panels and automation
4.1 Problems in the industrial environment
In industrial systems, power leaks are difficult to recognize because:
● Periodic occurrence
● Traditional current transformers cannot detect
4.2 Benefits in Practice
HYCA-01 as a residual current monitoring device allows:
● Real monitoring
● Diagnostic Error Extraction
● Direct integration with PLC
Result: fewer failures, fewer parades
5. Why replace traditional transformers?
5.1 Limitations to Modern Application
Systems based solely on current transformers:
● No constant current detected
● Electric vehicles and solar energy are not maintained
● Increased operational risk
5.2 Direct Benefits of HYCA-01
Use residual current monitoring devices like HYCA-01:
● Integrated switch + DC control
● Self-control function
● Easy integration (5V / PCB / up to 40A)
6. Conclusion: the choice is based on application and not only on components
6.1 The scene has changed.
Nowadays, it is not enough to choose a sensor. The The annex determines the decision.
Residual current monitoring devices are needed for electric vehicles, solar power and industry.
6.2 Next stages of the project
If you are developing:
● current transformer for EV charger
● current transformer for solar inverters
● HYCA-01 offers a direct solution for AC + DC leak current detection.
Request for technical support or proposal
Contact us:
● Data table HYCA-01
● Application support
● Factory Direct Offer
Quick response to the Brazilian project.
Compay: WENZHOU HEYI ELECTRICAL CO.,LTD
Brand: HEYI/ASCT
Contact: Bethy
E-mail: heyi@heyiele.com
Tel: 86-13968747975
Directly addresses the need for how to detect DC leakage current in EV chargers. 
Request for technical support or proposal