Step Lap Lamination
Step-lap lamination for transformer cores, manufactured in both horizontal and vertical step-lap construction.
Step Lap Lamination
Evergreen manufactures step-lap lamination in two constructions: horizontal step lap and vertical step lap. Both are cut to the customer's drawing and supplied in the step sequence specified by the design.
In either construction, successive laminations are offset by a defined step, so that the joints are distributed through the core rather than aligned in a single continuous gap.
The choice between horizontal and vertical step lap depends on the core geometry and the assembly method. Each construction is described below.
- Horizontal step-lap construction
- Vertical step-lap construction
- Joints offset layer by layer
- Supplied in the specified step sequence
Step Lap Lamination Is Supplied In Two Forms
Horizontal Step Lap Lamination
In horizontal step-lap construction, the step is taken along the length of the limb, so that the joints of successive layers are staggered horizontally across the core.
This is the common arrangement for three-phase power and distribution transformer cores, in which the yoke and limb meet at a mitred joint and the step sequence is repeated group by group through the stack.
Vertical Step Lap Lamination
In vertical step-lap construction, the step is taken through the depth of the stack, so that the joints are distributed vertically rather than along the limb.
This arrangement is suited to designs in which the core geometry or the assembly method makes a vertical stagger the more practical means of breaking up the joint line.
Built And Tested To A Guaranteed Standard
Quality checks run from the first operation on the machine right through to despatch.
- Individually tested to standard guarantee specifications
- Test certificate for every despatch
- High degree of precision engineering
- Delivered in a wooden box or on pallets
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