300A High-Precision 25MM Closed AC Current Transformer
Product No.: ZH-CT25
Compact 25mm through-hole design
High accuracy up to 0.1%
Easy PCB or cable installation
OEM & ODM supported
The ZH-CT25 Closed Current Transformer is a high-precision AC current sensor designed for industrial power measurement, energy management, and electrical monitoring applications. Featuring a 25mm inner diameter, 300A maximum current capacity, and 0.1% measurement accuracy, it delivers reliable and stable current sensing for demanding industrial environments.
Equipped with a 2-meter lead wire and housed in a durable flame-retardant ABS enclosure, the ZH-CT25 offers excellent insulation, mechanical strength, and long-term operational reliability. Its compact 80 × 68 × 20 mm design makes it easy to install inside electrical panels, switchgear, distribution cabinets, and industrial equipment.
The ZH-CT25 is fully compatible with RS485 Modbus data acquisition modules, PLCs, smart energy meters, power analyzers, SCADA platforms, and industrial IoT monitoring systems
Product Features
✔ Compact 25mm through-hole design
✔ High accuracy up to 0.1%
✔ Flame-retardant ABS enclosure
✔ Excellent linearity
✔ Low phase error
✔ Stable temperature performance
✔ Easy PCB or cable installation
✔ Long-term reliable operation
✔ Suitable for industrial environments
✔ OEM & ODM supported
✔ Maximum Current up to 300A
✔2 Meters Lead Wire
Technical Specifications
Available Current Ratios
Item
Specification
Model
ZH-CT25
Transformer Type
Closed Current Transformer
Inner Diameter
25mm
Housing Material
Flame-retardant ABS
Accuracy
0.1%
Lead Length
2 meters
Rated Current
300A Max
Size
80 × 68 × 20 mm
Output Type
Current Output
Frequency
50/60Hz (Custom Available)
Operating Temperature
-20℃ ~ +70℃
Insulation
High Insulation Design
Custom ratios are available according to customer requirements.
Primary Current
Secondary Output
50A
25mA
100A
50mA
150A
75mA
200A
100mA
300A
150mA
Applications
The ZH-CT25 is widely used in:
1.Industrial Automation
2.Energy Management Systems (EMS)
3.Smart Energy Meters
4.Power Distribution Cabinets
5.Electrical Control Panels
6.RS485 Modbus Data Acquisition Modules
7.PLC Monitoring Systems
8.SCADA Systems
9.Solar PV Monitoring
10.EV Charging Stations
11.UPS Monitoring
12.Battery Testing Equipment
13.Generator Monitoring
14.Building Energy Management Systems (BEMS)
15.Factory Power Monitoring
Product Advantages
1.0.1% High Measurement Accuracy
The ZH-CT25 provides precise AC current measurement with excellent linearity and low phase error, making it suitable for industrial automation, energy metering, and power quality monitoring.
2.Measures Current up to 300A
Designed for high-current applications, the transformer supports AC current measurement up to 300A, making it ideal for power distribution systems, industrial machinery, and high-load electrical equipment.
3.Durable Flame-Retardant ABS Housing
The industrial-grade ABS enclosure offers excellent electrical insulation, mechanical strength, and enhanced fire resistance for safe operation in demanding environments.
4.Easy Installation
The 25mm inner diameter accommodates larger power cables, while the 2-meter lead wire provides flexible installation in control cabinets and distribution panels.
5.Reliable Industrial Performance
Built with a premium magnetic core, the ZH-CT25 ensures stable output, minimal signal drift, and long service life under continuous operation.
Why Choose JSH Electronic?
JSH Electronic specializes in industrial signal acquisition and current sensing solutions.
We provide:
--OEM Manufacturing
--ODM Design
--Fast Delivery
--Factory Direct Supply
--Strict Quality Control
--CE & RoHS Products
--Professional Technical Support
FAQ
1.What is the maximum measurable current?What is the maximum measurable current?What is the maximum measurable current?What is the maximum measurable current?
The ZH-CT25 supports AC current measurement up to 300A.
2.What is the inner diameter?
The transformer features a 25mm through-hole, suitable for larger power cables used in industrial applications.
3.What is the standard lead wire length?
The standard lead wire length is 2 meters, with custom cable lengths available upon request.
3.Is the housing flame-retardant?
Yes. The enclosure is made from industrial-grade flame-retardant ABS, providing excellent insulation and enhanced safety.
4.Is it compatible with RS485 Modbus data acquisition modules?
Yes. The ZH-CT25 is designed for seamless integration with RS485 Modbus acquisition modules, PLCs, power analyzers, smart energy meters, and industrial monitoring systems.
5.Can the product be customized?
Yes. We provide OEM and ODM services, including custom current ratios, cable lengths, connectors, branding, and packaging.
