Current Transformer For EV Charging:
PRODUCT FEATURE
Our Products and Solutions
Custom Type A & Type B Current Transformers — Designed for Reliable AC/DC Leakage Detection and EV Charger Protection.
Engineered for Precision and Safety in EV Charging Applications
Balanced / Technical-Marketing Hybrid
Full DC & AC Leakage Detection Compliance
Detects 6mA DC and 20/30mA AC residual currents — fully compliant with IEC 62752 and UL2231, making it ideal for EV charging safety.
Wide Operating Temperature
From -40°C to +105°C Engineered for reliability in extreme environments, from freezing cold to high-heat industrial or outdoor conditions.
Fast Calibration & Built-in Self-Test Logic
Supports automated calibration (≥240ms) and self-test mode (≥60ms), with clear SCR output logic (DC 4.8V when fault detected), simplifying integration and diagnostics.
Low Power Consumption, High Precision
Consumes only 110mW, yet maintains accurate detection through calibration signal compensation — ideal for energy-conscious smart systems.
Clear Digital Output with Strong Drive Capability
SCR signal output delivers clear fault status (LOW 0V / HIGH 4.8V), with current drive capability up to 5mA, allowing direct interfacing with control systems.
Designed for Seamless Embedded Integration
Supports 5V ±0.25V supply, simple digital pin control logic, and standardized signal timing – making it plug-and-play friendly for most microcontrollers and safety modules.
Full DC & AC Leakage Detection
Engineered for EV charger safety modules — detects 6 mA DC / 30 mA AC with high stability and low power consumption.
Description Of Pins
| PIN | Pin Name | Input/Output | Instruction |
|---|---|---|---|
| PIN1 | UART_RX | Input | Data Reception |
| PIN2 | SCR | Output | SCR action signal output, when the residual current is less than the set threshold, the SCR pin is low DC 0V; when the residual current exceeds the set threshold, the SCR pin outputs high DC 4.8V; current drive capability ≤ 5mA |
| PIN3 | STIN | Input | Self-test signal input, this pin function needs to be operated after calibration is completed; STIN pin pulls low to ground, hold time needs to be ≥60ms, SCR pin outputs high level (SCR pin hold time is STIN low hold time -30ms), when not in self-test state, this pin must be pulled up to DVDD; |
| PIN4 | CAL | Output | Calibration signal input, every time before the chip power self-test, need to carry out calibration operation, correct the module accuracy offset (Input pin to ground pull-down, time ≥ 240ms, complete calibration), non-calibration state, this pin must be pulled up to VDD; complete the calibration of the zero LED1 pin outputs a 500ms low-level pulse signal; |
| PIN5 | GND | Output | Chip Analog Ground |
| PIN6 | VDD | Output | Supply voltage 5±0.25V |
REGUAL ELECTRICAL SPEC
| Rated residual operating current1（DC） | 6mA DC |
|---|---|
| Rated residual operating current2（AC） | 20mA/30mA AC |
| Supply Voltage | 5V（DC） |
| Operating temperature | -40~105℃ |
| Power wastage | 110mW |
| Standard | Compliance with IEC 62752, UL2231 is required |
Why Choose ZTC’s Rogowski Coils? (Refined — technical, process & market focus)
| Feature | ZTC Type A & B CT | Typical Other Suppliers |
|---|---|---|
| Leakage Detection Capability | √ Detects 6 mA DC and 20/30 mA AC residual currents per IEC 62752 & UL2231; Supports both Type A and Type B leakage patterns for advanced EV charging modules. | × Often supports only Type A (AC + pulsating DC) leakage; limited DC response and slower fault detection. |
| Signal Integrity & Output Logic | √ Integrated self-test circuit and digital SCR output (LOW 0V / HIGH 4.8V); Fast calibration (≥240 ms) and fault self-test (≥60 ms) for real-time monitoring. | × No built-in self-test or calibration logic; analog-only output requiring extra circuit integration. |
| Customization & Integration | √ OEM-tailored design: selectable sensitivity, voltage output (0–5V / 4–20mA), and custom connectors; plug-and-play for most microcontrollers and EV safety modules. | × Catalog-based models with minimal customization; slower adaptation to customer-specific designs. |
| R&D, Supply Security & Support | √ Patents and ongoing R&D; in-house magnetic-core capability for supply continuity; dedicated engineering for integration and tuning; global technical support and evaluation units. | × Limited R&D investment; cores often outsourced; support tends to be reactive and fragmented. |
Why CHOOSE US
ZTC RC series Rogowski Coils – Excellent quality and technology come from professionalism and innovation.
Technical Leadership
Over 20 patented technologies with continuous R&D investment to ensure our Rogowski Coils remain at the forefront of industry performance.
Certified Quality
Factory direct selling, ISO 9001 manufacturing, CE/ETL certified, RoHS-compliant, trusted by global brands.
Precision & Wide Bandwidth
Accurate measurement from 50 Hz to 20 kHz with ±1.0% linearity, ensuring reliable performance for both low-frequency and high-frequency applications.
Custom Engineering Service
An experienced engineering team providing one-stop solutions from concept to mass production, fully tailored to your electrical and mechanical requirements.
Our Story
Xiamen ZTC Technology Co., Ltd (Zentar® ) found in 1993 is located in Xiamen, a harbor city in Southeast China. It is about 3 hours by high-speed train far from Shenzhen.
We are a leading manufacturer of current transformers for electrical safety and electric measuring industry. By three decades development, around 250 workers producing more than 2000+ customized products to meet customers’ various needs.
As an innovation-oriented enterprise and IATF16949 factory, we bring into automated equipments and machines to increase production efficiency and meet customers in auto industry high quality standard.
Stay ahead, and constantly committed to advanced technologies, research and development of new products and new markets. Providing high quality current transformers and expertise in assisting customers develop and launch projects for EV charging modules, GFCI, RCD and wireless energy monitors.
- ISO 9001 14001 IATF16949 Factory
- Automated Production
- Industry And Technical standards Maker
- Industry-University-Research Collaboration
- Leading Supplier Of Nickel alloy Ring Cores Used In GFCI And RCD
- Years In Service 30+
- RoHS REACH Compliance
- UL ETL CE CCC Certified
- The Fast Growing Of small And Medium Enterprise
- Honoured with an award of innovation-oriented enterprise
What We Offer
As a high-tech orientation enterprise and industrial manufacturing entity, we dedicate provide our valued customers from design concept to final products delivery.
Industry Expertise And Professional Advice
We have well educated engineers collaborate with rich experienced technican dedicating to project developing and problem solving. Providing professional advice for split core current sensor, differential current transformer mechanical design, electrical parmeters setting for EV charging solution, energy monitor system application.
High Efficiency And Sufficient Production Capacity
Our plant covers 20,000 square meters holding more than 300 well skilled workers and hundreds winding machines and testing instruments with automated equipments. We are pleasure to meet your requirments at different stages of project, small lot and bulk orders are all available for manufacturing.
Stable Performance And Reliable Quality
As current transformers are kinds of critical components used for electrical safety devices, we highly value quality in the whole process. By doing 100% incoming and outcoming inspection, customers are satisfied with our strict quality control.
QUALITY CONTROL
Incoming Inspection
- GB/T2828.1 Sampling Standard
- Strict Quality Inspection For Each Batch (AQL Standard)
- Suppliers Audit Regularly
In-process Inspection
- Operators Self-Checking 2 Hours / Time
- Production According To Manufacturing Instruction (SOP)
- 6S Management
- Equipment Periodic Maintenance
Outgoing Inspection
- Batch Tracking - Product Traceability
- 100% Electrical Output Testing
- Delivery Inspection Report Checklist
Hear from our clients
Our clients love working with us, just read what they have to say!
“ZTC’s reliable delivery schedules and competitive pricing have made them a trusted partner in our supply chain. Their ISO 9001 processes give me confidence that every shipment meets our specifications without surprises.”
Hewitt
Procurement Manager
“The wide bandwidth and ±1.0% accuracy of ZTC’s Rogowski Coils fit perfectly into our energy monitoring systems. Their engineering team provided detailed technical support, making integration smooth and efficient.”
Vikram
Technical Engineer
“Every batch from ZTC passes our incoming inspection without issue. Their RoHS-compliant materials and 100% product testing align with our strict quality standards, reducing rework and warranty claims.”
Grey
Quality Manager
“The lightweight, flexible coil design is a game-changer for installation. I can fit them around large busbars without disconnecting power, saving hours of work and minimizing downtime for our clients.”
Bill
Electrician
Get a quote
We would love to speak with you.
Feel free to reach out using the below details.
Get in Touch
- Provide you current transformers solution.
Address
- No.18 Xiangming Rd, Xiang An, Xiamen, Fujian, China 361101
Hours
- Mon-Fri 8:00AM - 5:30PM
