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Welcome to Anping County Boli Hardware Wiremesh Products Factory – a trusted manufacturer established in 1998 with over 25 years of experience in precision metal components. Our Permalloy Instrument Transformer Core Using Stainless Steel Strip Coil is engineered to deliver exceptional magnetic performance and long-term reliability for current transformers (CTs) and voltage transformers (VTs). By combining the high permeability of Permalloy with the corrosion resistance and mechanical strength of stainless steel strip coils, we provide a core solution that ensures accurate measurement, low energy loss, and stable operation in harsh environments.
Each core is meticulously manufactured using advanced cold-rolled strip technology, offering consistent magnetic properties and tight dimensional tolerances. Our stainless steel strip coil not only reinforces the core structure but also protects against rust and mechanical damage, making it ideal for outdoor or industrial applications. With annual export value reaching US$5–10 million, we serve global markets across North America, South America, Europe, Asia, and more, delivering products that meet international quality standards.
Key Features & Technical Specifications
- High Permeability: Permalloy core (typically 80% Ni-Fe) ensures excellent magnetic flux density, reducing measurement errors.
- Stainless Steel Strip Coil Construction: Provides superior corrosion resistance, mechanical rigidity, and thermal stability compared to conventional cores.
- Low Core Loss: Optimized lamination design minimizes eddy current and hysteresis losses, improving energy efficiency.
- Customizable Dimensions: Core thickness from 0.05mm to 0.35mm, width from 5mm to 300mm, and various shapes (toroidal, E-I, C-type) available upon request.
- Insulation Options: Bare core or with insulating coating (epoxy, polyester) to meet specific voltage requirements.
- Wide Operating Temperature: -40°C to +150°C, suitable for extreme climates.
| Parameter | Value |
|---|---|
| Material Composition | Permalloy (Ni-Fe) + Stainless Steel Strip |
| Saturation Flux Density (Bs) | 0.7 – 0.8 T (typical) |
| Initial Permeability (μi) | 20,000 – 100,000 (depending on heat treatment) |
| Core Loss (at 50Hz, 1T) | ≤ 0.5 W/kg (customizable) |
| Operating Temperature Range | -40°C to +150°C |
| Insulation Resistance | ≥ 1000 MΩ (with coating) |
Customer Benefits
- Enhanced Accuracy: High permeability reduces phase error and ratio error in instrument transformers, meeting IEC 61869-2 standards.
- Long Service Life: Stainless steel strip coil prevents rust and corrosion, even in humid or chemical environments, extending product lifespan.
- Compact Design: Our cores allow for smaller transformer sizes without sacrificing performance, saving space in electrical panels.
- Tailored Solutions: We offer custom sizes, shapes, and coatings to match your specific design requirements. Contact us for a quote.
- Reliable Supply Chain: We ship from Tianjin, Qingdao, Shanghai, and Foshan ports, with typical lead times of 15–30 days depending on order volume.
Why Choose Anping County Boli Hardware Wiremesh Products Factory? Since 1998, we have been dedicated to metal fabrication excellence. Our factory is equipped with precision slitting lines, annealing furnaces, and quality testing instruments. We have exported to over 15 countries and regions, with annual export revenue of US$5–10 million. Our cores are used in reputable brands of instrument transformers worldwide. We stand behind every product with rigorous quality control and responsive after-sales support.
Ready to upgrade your transformer design? Contact us today for a free consultation or sample request. Let our Permalloy Instrument Transformer Core with Stainless Steel Strip Coil bring reliability and efficiency to your next project.
Frequently Asked Questions
Q1: What is the difference between Permalloy and standard silicon steel cores?
Permalloy offers much higher initial permeability (up to 100,000) and lower core loss at low frequencies, making it ideal for precision instrument transformers. Silicon steel is cheaper but less accurate.
Q2: Can I get a custom size or shape for my transformer core?
Yes, we offer full customization. Please provide your required dimensions, shape (toroidal, E-I, etc.), and thickness. Our team will produce a sample for approval.
Q3: How does the stainless steel strip coil improve performance?
The stainless steel strip acts as a structural reinforcement, protecting the fragile Permalloy laminations from mechanical stress and corrosion. It also helps dissipate heat more evenly.
Q4: What is the typical lead time for an order?
For standard cores, lead time is 15–20 working days. For custom orders, it may extend to 25–30 working days depending on complexity.
Q5: Do you provide samples before mass production?
Yes, we offer samples for evaluation. The cost of samples and shipping is negotiable, and we will deduct it from the final order if you purchase.
Q6: What is the minimum order quantity (MOQ)?
Our MOQ for standard cores is 100 pieces per design. For custom designs, it may vary. Please contact us to discuss your requirements.
Q7: How do you ensure product quality?
We perform magnetic property testing (permeability, core loss) on every batch, plus dimensional checks and surface inspection. Our quality management system is based on ISO 9001 principles (though not certified, we follow strict internal standards).
Q8: Can I use this core for high-frequency applications?
Permalloy cores are typically optimized for 50/60 Hz power frequency. For higher frequencies (e.g., 400 Hz or kHz), we recommend discussing with our engineers to select the appropriate material and lamination thickness.
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