Nanocrystalline cores
PML manufactures high-performance Energy Meter Cores using nano crystalline and amorphous materials.
Engineered for extreme linearity and phase-shift stability, our energy meter cores provide the reliable, tamper-proof current sensing required for the most demanding residential and industrial smart metering infrastructure.
Used in high-accuracy energy meter CTs & broadband transformers and sensors, these cores are produced using precision automatic core winding machines to ensure consistent quality and high throughput. Post-winding, cores are heat-treated in a high-tech, controlled-atmosphere furnace to optimize magnetic properties. Cores are either plastic-encapsulated or epoxy-coated, and are 100% tested on core sorting machines before dispatch.
Properties
Compared to traditional materials like silicon steel or permalloy, nano crystalline alloy offers superior accuracy, thermal stability, and cost-effectiveness for compact current transformer applications.
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Made from nano crystalline alloy (82% Fe with Si, B, Nb, Cu, C, Mo, Ni).
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High permeability, low core loss, and high saturation flux density.
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Plastic casing or epoxy coating based on customer needs.
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Operates efficiently from -55°C to +130°C.
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Supports 0.1, 0.2, and 0.5 accuracy class CTs.
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Reduces current measurement errors.
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High magnetic flux allows for smaller, lighter CTs.
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Excellent operation in extreme environments.
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Competitive alternative to permalloy-based cores.
Properties
To streamline the order process:
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5, 8, 10, 15, 20, 25, or 30 mm
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(OD × ID × H)
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Nano, Amorphous, or Hybrid
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Permeability, AL value, voltage/current, frequency, number of turns
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Plastic encapsulation or epoxy coating
We offer a wide range of standard core sizes in plastic casing for various current ratings.
Core Rating | Dimensions | Type | Specs |
5A Core | 13 × 17.8 × 5 mm | Standard | 5A Core Size 13x18x5.pdf |
30A Core | 14 × 19 × 8 mm | Hybrid DC Immune | 30A Core Size 14x19x8.pdf |
60A Core | 17 × 24 × 8 mm | Hybrid DC Immune | 60A DC immune Core Size 17x24x8 .pdf |
120A Core | 20 × 30 × 8 mm | Hybrid DC Immune | 120A DC immune Core.pdf |
200A Core | 50 × 60 × 10 mm | Hybrid DC Immune | 200A DC immune Core Size 50x60x10.pdf |
| Range of standard Core sizes | ||||
|---|---|---|---|---|
| Part No. | Core Dimensions ODXIDXH | Finished Dimensions ODXIDXH | CT Accuracy | DC Compliance |
| E-NA10-P-08-R0 | 20X14X10 | 22.5X12.1X12.2 | 0.5-0.1 Class | 20 - 40 A |
| E-NA10-P-11-R0 | 21X15X10 | 23.6X12.8X12.8 | 0.5-0.1 Class | 10 - 40 A |
| E-NA8-P-23-R0 A | 24X15.5X8 | 26.3X13.7X9.9 | 0.5 - 0.1 Class | 60A |
| E-NA10-P-12-R0 | 21X16X10 | 24.7X14.0X12.5 | 0.5 - 0.1 Class | 40-60A |
| -NA10-P-13-R0 | 23X16X10 | 25.0X14.0X13.0 | 0.5 - 0.1 Class | 40-60A |
| E-N8A-P-24-R0 A | 25X16X8 | 27.8X13.7X10.8 | 0.5 -0.1 Class | 60A |
| E-NA10-P-13-R0 | 22X17X10 | 24.4X15.3X12.3 | 0.5 -0.1 Class | 60A |
| E-NA10-P-13-R0 A | 22X17X10A | 24.4X15.3X12.3 | 0.5 -0.1 Class | 30A |
| E-NA8-P-18-R0 | 24X17X8 | 26.3X15.3X9.9 | 0.5 -0.1 Class | 60A |
| E-NA10-P-14-R0 | 25X17X10 | 28.0X15.6X12.8 | 0.5 -0.1 Class | 80A |
| E-N10-P-14-R0 A | 25X17X10A | 28.0X15.6X12.8 | 0.5 -0.1 Class | 100A |
| E-NA8-P-19-R0 | 28X17X8 | 29.8X15.2X10.1 | 0.5 -0.1 Class | 65A |
| E-NA8-P-20-R0 A | 28X17X8A | 29.8X15.2X10.1 | 0.5 -0.1 Class | 100A |
| E-NA10-P-15-R0 | 24X18X10 | 26.6X15.8X12.8 | 0.5 -0.1 Class | 60-100A |
| E-NA12-P-04-R0 | 25X18X12 | 27.6X16.2X14.2 | 0.5 -0.1 Class | 100A |
| E-NA15-P-06-R0 | 28X18X15 | 30.2X16.0X17.6 | 0.5 -0.1 Class | 100A |
| E-NA8-P-21-R0 A | 27X19X8 | 29.3X16.6X9.8 | 0.5 -0.1 Class | 60-100A |
| E-NA12-P-05-R0 | 27X19X12 | 28.9X17.1X13.9 | 0.5 -0.1 Class | 100-20A |
| E-NA12-P-06-R0 | 28X19X12 | 30.2X17.1X13.9 | 0.5 -0.1 Class | 120A |
| E-NA8-P-22-R0 A | 30X20X8A | 32.7X18.0X9.8 | 0.5 -0.1 Class | 100-120A |
| E-NA10-P-16-R0 | 29X21X10 | 32.1X18.8X13.8 | 0.5 -0.1 Class | 60-80A |
| E-NA10-P-16-R0 A | 29X21X10A | 32.1X18.8X13.8 | 0.5 -0.1 Class | 100A |
Magnetic Properties | Properties | Nano Crystalline | Amorphous |
| Bs (Tesla) | 1.25 | 1.56 |
| Br (Tesla) | 0.6 ~ 0.7 | 0.8 |
| μ i(min) at 50Hz and Hmax = 0.8mA/cm | >80,000 | >1100(at 1000Hz) |
| μ max(min) at 50 Hz | >2,00,000 | - |
| Hc(max) (A/m) | 0.8 | 4 |
| Core loss(max)(W/kg) at 50Hz | 0.5 | 0.5 |
Chemical Composition (Atomic %) | %Fe | Balance % | Balance % |
| %Cu | 1% | 0% |
| %Nb | 3% | 0% |
| %Si | 13.5% to 15.5% | 13.5% to 15.5% |
| %B | 6% to 8% | 6% to 8% |
Physical Properties | Curie Temp (oC) | 560 | 410 |
| Density (gmslcc) | 7.2 | 7.2 |
| Resistivity (μ.Ω.cm) | 130 | 130 |
| Working (max allowed temperature in degree C) | 130 | 130 |
With over 65 years of manufacturing excellence, PML delivers Energy Meter Core trusted by OEMs and Tier 1 suppliers across sectors demanding robust performance.
High Performance Nanocrystalline Low & High Tension Current Transformer Cores
Rapidly detects ground faults to prevent electrical accidents.
High-efficiency Fe-based amorphous cores designed for ultra-low energy loss
Essential for protecting personnel from electric shocks and fire hazards.
Compact & Robust Cores for Inverter Welding Systems
High Performance Nanocrystalline Low & High Tension Current Transformer Cores
Rapidly detects ground faults to prevent electrical accidents.
High-efficiency Fe-based amorphous cores designed for ultra-low energy loss
Essential for protecting personnel from electric shocks and fire hazards.
Compact & Robust Cores for Inverter Welding Systems
Pioneering cutting-edge technology to develop reliable, high-performance magnetic components and engineering solutions.
