Lamination Materials
Transformer Design Equations
US Standard Lamination Sizes
EI inches
EI metric
Long E inches
Long E metric
EE inches
EE metric
F inches
F metric
L inches
L metric
DU inches
DU metric
UI inches
UI metric
European Lamination Sizes
EI
EE, F
E, EL, ED
EK Staked Stacks
Transformer Lamination Catalog
European Style EK Stacks
Part No.
A
L
A
B
C
D
E
F
G
Core Area
Path length
Window area
Weight sq. stk.
Gauge Avail
-
(2)
mm
mm
mm
mm
mm
mm
mm
cm
2
cm
cm
2
Kg
mm
EK20
400
20.0
20.0
3.0
14.0
3.0
4.0
6.0
0.360
4.80
0.560
0.015
0.2
"
500
"
"
"
"
"
"
"
"
"
"
"
"
"
630
"
"
"
"
"
"
"
"
"
"
"
"
EK25
200
25.0
25.0
3.8
17.4
3.8
4.9
7.6
0.578
5.98
0.853
0.030
0.2
"
400
"
"
"
"
"
"
"
"
"
"
"
"
"
500
"
"
"
"
"
"
"
"
"
"
"
"
"
630
"
"
"
"
"
"
"
"
"
"
"
"
"
800
"
"
"
"
"
"
"
"
"
"
"
"
EK32
630
32.0
32.0
4.8
22.4
4.8
6.4
9.6
0.922
7.68
1.44
0.062
0.2
"
1000
"
"
"
"
"
"
"
"
"
"
"
"
(1) For 'A' grade; 'B' grade = 0.94 x 'A' weight
(2) For 'B' grade 0.2mm thick
