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Help CenterSingle-Phase Epoxy Resin Current Transformer for Industrial Panel Metering and Energy Monitoring
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Jinhua Dika Electrical Equipment Co., Ltd., a dedicated manufacturer with over a decade of experience in precision electrical components, proudly presents our Single-Phase Epoxy Resin Current Transformer. Engineered specifically for the demanding environments of industrial panel metering and energy monitoring systems, this CT is built to deliver unwavering accuracy, long-term reliability, and exceptional safety. As a company with a significant export footprint across North America, Southeast Asia, Europe, and beyond, we understand the critical need for measurement components that perform consistently under diverse operational conditions. Our commitment to a robust quality management system ensures that every unit leaving our facility in Jinhua, Zhejiang, meets stringent performance criteria, providing you with a trustworthy foundation for your energy data acquisition and power management solutions.
This current transformer is designed as the ideal sensing element for a wide range of applications where precise current measurement is non-negotiable. Its core construction and material selection are focused on overcoming common challenges in industrial settings.
- Robust Epoxy Resin Encapsulation: The transformer is fully encapsulated in high-grade, flame-retardant epoxy resin. This provides superior protection against moisture, dust, chemicals, and mechanical shock, making it suitable for harsh industrial environments where traditional oil-filled or tape-wrapped transformers might fail.
- High Accuracy and Linear Performance: Utilizing advanced core materials and precision winding techniques, our CT maintains its stated accuracy class across a wide range of primary currents, from low loads to overload conditions. This linearity is crucial for accurate energy billing, load profiling, and power quality analysis.
- Excellent Isolation and Safety: The epoxy resin provides high dielectric strength, ensuring safe isolation between the primary high-voltage circuit and the secondary low-voltage measurement circuit. This enhances overall system safety for personnel and equipment.
- Compact and Versatile Design: The cast resin construction allows for a compact form factor, saving valuable space in crowded panel boards and metering cabinets. Multiple mounting options, including panel mount and DIN rail compatibility, offer flexibility for different installation requirements.
- Low Power Loss and High Overcurrent Capacity: The design minimizes core loss and excitation current, reducing its own impact on the measured circuit. It is also built to withstand short-term overcurrents without damage or saturation, ensuring durability during fault conditions.
To help you specify the correct model for your application, below is a table outlining standard technical parameters. Custom specifications for primary current, ratio, accuracy, and physical dimensions are available upon request to match your specific project needs.
| Parameter | Specification / Option |
|---|---|
| Standard Accuracy Class | 0.5, 1.0, 3.0 |
| Standard Frequency | 50 Hz / 60 Hz |
| Secondary Current Output (Is) | 1 A or 5 A |
| Primary Current Range (Ip) | From 5A up to several kA (Custom) |
| Burden (VA) at stated Accuracy | 2.5 VA, 5 VA, 10 VA (e.g., for Class 0.5) |
| Insulation Level | Up to 3 kV / 50 Hz for 1 min |
| Thermal Short-Time Current (Ith) | Typically 50 x In for 1 second |
The benefits of integrating our Single-Phase Epoxy Resin CT into your systems are clear and impactful. For panel builders, it means a reliable, maintenance-free component that simplifies assembly and reduces long-term warranty concerns. For system integrators and end-users in manufacturing, commercial buildings, or renewable energy plants, it translates into accurate energy data. This data is essential for cost allocation, identifying energy waste, monitoring equipment health, and ensuring compliance with energy management standards. The durability of the epoxy cast design significantly reduces the total cost of ownership by eliminating the need for replacements due to environmental degradation.
Choosing Jinhua Dika as your supplier means partnering with a manufacturer that has a proven track record. Our products reach a global clientele through major ports like Shanghai, Tianjin, Guangzhou, and Ningbo, demonstrating our logistical capability. Our operational framework is guided by internationally recognized management principles. We maintain a focused team of 11-50 skilled professionals dedicated to quality and innovation. This foundation allows us to offer a product that is not just a component, but a reliable partner in your measurement chain. For your next project requiring dependable, accurate, and robust current sensing for metering or monitoring, contact us to discuss your specifications. We are ready to provide a solution that meets your technical requirements and supports your business goals for efficiency and control.
Frequently Asked Questions (FAQ)
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Q: What is the main advantage of an epoxy resin cast CT compared to other types?
A: The primary advantage is its exceptional environmental robustness. The solid epoxy casting provides a hermetic seal that is immune to moisture, dust, and many corrosive atmospheres, making it ideal for harsh or outdoor-adjacent industrial installations without needing an additional enclosure. -
Q: Can this current transformer be used for both energy billing (revenue) metering and general-purpose monitoring?
A: Yes, absolutely. The key is selecting the appropriate accuracy class. For revenue-grade billing where legal metrology may apply, a 0.5 class or higher accuracy model is recommended. For general load monitoring, energy management systems (EMS), or protection relays, Class 1.0 or 3.0 models are often sufficient and cost-effective. -
Q: How do I select the correct primary current rating?
A: The primary current rating should be chosen based on the maximum continuous current expected in the circuit where it will be installed. A common practice is to select a rating that is 20-30% higher than the maximum normal operating current to ensure the CT operates in the linear part of its range and can handle temporary overloads. -
Q: What does "burden" mean, and why is it important?
A: Burden, measured in Volt-Amperes (VA), is the maximum load (impedance) that can be connected to the transformer's secondary terminals while still maintaining its stated accuracy. Exceeding this burden will cause measurement errors. It is crucial to ensure the combined impedance of all connected wires and meters is less than the CT's rated burden. -
Q: Is the secondary circuit safe to touch during operation?
A: No, it is never safe to assume this. While the epoxy provides excellent isolation, a critical safety rule is that the secondary circuit of a current transformer must never be opened while the primary circuit is energized. An open-circuited secondary can generate dangerously high voltages, posing a severe shock hazard and potentially damaging the CT. -
Q: Do you offer custom ratios and physical dimensions?
A: Yes, as a manufacturer, we specialize in providing customized solutions. We can produce CTs with non-standard primary/secondary current ratios, specific accuracy requirements, and tailored physical dimensions or mounting configurations to fit unique panel layouts or application needs. -
Q: What is the typical lead time for standard and custom orders?
A: Lead times vary based on order quantity and specification complexity. Standard models with common ratings may be available from stock or have shorter production cycles. For custom-engineered units, we provide a clear timeline upon review of your detailed requirements to ensure reliable delivery planning for your project. -
Q: How should these transformers be stored and handled before installation?
A: Store them in a clean, dry environment away from direct sunlight and extreme temperatures. Avoid mechanical impacts or stacking heavy items on them. The terminals should be protected from contamination. Following these simple guidelines will ensure the CT is in optimal condition when installed.
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