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Help CenterPermalloy Strip Coil Core for Instrument Transformers High Permeability Mumetal Material
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Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer of precision magnetic components since 1998. With an annual export value of US$5 million to US$10 million and a strong presence in global markets including North America, Europe, and Asia, we are proud to offer our Permalloy Strip Coil Core for Instrument Transformers – a high-performance solution made from premium Mumetal material. This product is designed to deliver exceptional magnetic permeability, low core losses, and stable performance, making it an ideal choice for precision current and voltage transformers.
Our Permalloy strip coil cores are crafted from high-grade nickel-iron alloy (typically 80% nickel, 20% iron) that exhibits outstanding soft magnetic properties. The material is carefully annealed to achieve maximum permeability and minimal hysteresis loss. Whether you are designing measurement transformers, protection relays, or energy metering devices, this core provides the accuracy and reliability your application demands.
Key Features & Technical Specifications
- High Initial Permeability: Typically >10,000, ensuring excellent sensitivity even at low magnetic flux densities.
- Low Coercivity: < 1 A/m, reducing energy loss and improving linearity.
- Low Core Loss: Optimized for frequencies from 50 Hz to 10 kHz, suitable for power frequency and medium-frequency transformers.
- Excellent Magnetic Stability: Minimal temperature and aging drift, ensuring long-term accuracy.
- Customizable Dimensions: Thickness from 0.05 mm to 0.5 mm, width from 5 mm to 200 mm, and various strip lengths to meet your specific winding requirements.
- Surface Treatment Options: Standard annealed condition; optional epoxy coating or insulation layer for enhanced electrical isolation.
| Parameter | Typical Value | Remarks |
|---|---|---|
| Material Composition | 80% Ni, 20% Fe (Permalloy) | Mumetal grade |
| Initial Permeability (μi) | ≥ 10,000 | Measured at 1 kHz, 0.1 mT |
| Maximum Permeability (μmax) | ≥ 50,000 | After proper annealing |
| Coercivity (Hc) | ≤ 1 A/m | Low hysteresis loss |
| Saturation Flux Density (Bs) | ~0.75 T | Suitable for low-level signals |
| Operating Temperature | -40°C to +130°C | Wide range for industrial use |
Advantages for Your Application
- Enhanced Accuracy: The high permeability and low hysteresis ensure that instrument transformers maintain precise ratio and phase angle errors, critical for metering and protection.
- Reduced Size and Weight: Compared to traditional silicon steel cores, Permalloy cores allow for smaller transformer designs without sacrificing performance.
- Minimized Noise and Vibration: The low magnetostriction of Mumetal contributes to quieter operation in sensitive equipment.
- Long Service Life: Our cores are manufactured under strict quality control, with consistent magnetic properties and resistance to aging.
As a manufacturer with over 25 years of experience, we understand the importance of consistency and reliability. Every batch of Permalloy strip coil cores undergoes rigorous testing for magnetic performance, dimensional accuracy, and surface quality. We ship from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery to customers worldwide. Our annual export volume of US$5 million to US$10 million reflects the trust our global partners place in us.
We invite you to experience the difference that high-quality materials and precision manufacturing can make. Contact us for detailed specifications, custom sizes, or sample requests. Let our Permalloy strip coil cores elevate the performance of your instrument transformers.
Frequently Asked Questions
- What is the difference between Permalloy and Mumetal? Both are nickel-iron alloys with high permeability. Mumetal is a brand name for a specific blend (about 80% Ni), but the terms are often used interchangeably. Our cores are made from high-grade Mumetal / Permalloy material.
- Can I get custom dimensions for my transformer core? Yes, we offer custom thickness, width, and strip length. Please provide your required specifications, and we will produce accordingly.
- What is the typical lead time? Standard sizes are usually available within 2–3 weeks. Custom orders may take 4–6 weeks, depending on complexity.
- Do you provide samples before mass production? Yes, we can provide samples for evaluation. Sample costs and shipping are negotiable.
- What certifications do you have? Our factory implements internal quality control systems. Specific certifications can be discussed upon request; we are open to third-party inspections.
- How are the cores packaged for export? They are vacuum-sealed with rust-proof paper, then packed in sturdy cartons or wooden cases to prevent damage during transit.
- Can these cores be used for high-frequency applications? They are optimized for frequencies up to about 10 kHz. For higher frequencies, consider other materials like ferrite cores; we can advise on the best solution.
- What is the minimum order quantity? Typically 100 kg per specification, but smaller quantities are possible for sample or trial orders.
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