Automatic EI-54 Lamination Stacking Machine for Instrument and Metering Transformer Core Assembly, ±0.1 mm Accuracy, 250 Stacks/Min, PLC Control, CE

Automatic EI-54 Lamination Stacking Machine for Transformer Core Assembly

The EI-54 automatic lamination stacking machine inserts E & I silicon steel laminations into transformer coil bobbins under PLC control. Sized for 15-60 VA cores, it delivers ±0.1 mm stacking accuracy at speeds up to 250 stacks per minute, producing the uniform, tightly compressed cores that instrumentation and metering transformers depend on.

Why Metering Cores Leave No Room for Drift

In instrument and metering transformers, the core is the reference. A stack that is loose, misaligned or unevenly compressed changes the effective air gap, which shifts ratio error and phase displacement – and a meter calibrated against that core inherits the error for its entire service life. Because these cores are produced in long runs and inspected in batches, small inconsistencies do not average out; they accumulate. The EI-54 removes the operator variable: every lamination is placed with the same controlled motion and the same compression force, so stack number 5,000 matches stack number 1.

Key Specifications

Built for Repeatable, Traceable Output

✅ Exact Lamination Counting – The PLC counts every lamination, so each core contains the specified quantity and no under- or over-stacked cores reach the test bench.

✅ Stable Compression Every Cycle – Consistent stacking force holds the effective air gap steady, keeping ratio error and phase displacement within specification.

✅ Uniform Lamination Alignment – Precise E & I positioning limits burrs and edge misalignment, supporting low core loss and low exciting current.

✅ Protects Interlaminar Insulation – Smooth lamination handling preserves the insulation coating on thin silicon steel instead of abrading it.

✅ Fast Changeover Between Sizes – Touch-screen parameter changes move the machine between EI-54 core variants in minutes, without mechanical re-tooling.

✅ Automatic Jam Detection & Stop – The PLC halts the cycle immediately on a misfeed, protecting both the material and the tooling.

✅ Compact and Easy to Deploy – At 70 kg with a space-saving structure, it drops into an existing winding line without a rebuild.

✅ Safe by Standard – Dual grounding, overload and short-circuit protection, emergency stop and guarded moving parts.

Where the EI-54 Fits in Your Line

Designed for 15-60 VA cores, the EI-54 suits manufacturers of instrument and metering transformers, current and potential transformers, measurement and protection transformers, small control and isolation transformers, and precision power supplies. It accepts both cardboard and plastic bobbins and works equally well as a standalone stacking station or inside a winding and assembly cell.

Why Choose Us?

We are a direct manufacturer offering competitive factory pricing and CE certified quality assurance. Our equipment has served globally renowned customers including GE Vernova and Eaton (USA) as well as leading enterprises such as CATL and Chint Electric, and is exported to more than 20 countries and regions. Delivery within 1-15 working days, professional after-sales technical support, and a 12-month warranty. The full EI series from EI-19 to EI-300 is available to match your production requirements.

Automatic EI-54 Lamination Stacking Machine for Instrument and Metering Transformer Core Assembly, ±0.1 mm Accuracy, 250 Stacks/Min, PLC Control, CE Images