Power Products/Transformer Lamination
TYPE |
A |
B |
C |
D |
E |
F |
G |
H |
HOLE |
17 F |
31.75 |
31.75 |
6.36 |
6.35 |
19.05 |
11.11 |
6.35 |
20.63 |
N/A |
12 F |
40 |
40 |
8 |
8 |
24 |
14 |
8 |
26 |
N/A |
23 F |
47.5 |
47.5 |
9.5 |
9.5 |
28.5 |
16.62 |
9.5 |
30.87 |
N/A |
30 F |
50 |
50 |
10 |
10 |
30 |
17.5 |
10 |
32.5 |
5.5 |
31 F |
55.5 |
55.5 |
11.1 |
11.1 |
33.299999999999997 |
19.420000000000002 |
11.1 |
36.07 |
N/A |
41 F |
33 |
33 |
6.6 |
6.6 |
19.8 |
11.52 |
6.6 |
21.45 |
N/A |
15 F |
63.5 |
63.5 |
12.7 |
12.7 |
38.1 |
22.22 |
12.7 |
41.27 |
5.5 |
33 F |
70 |
70 |
14 |
14 |
42 |
24.5 |
14 |
45.5 |
5.5 |
3 F |
80 |
80 |
16 |
16 |
48 |
28 |
16 |
52 |
6.35 |
16 F |
95 |
95 |
19 |
19 |
57 |
33.25 |
19 |
61.75 |
6.35 |
133 F |
111 |
111 |
22.2 |
22.2 |
66.599999999999994 |
38.85 |
22.2 |
72.150000000000006 |
7 |
43 F |
127 |
127 |
25.41 |
25.41 |
76.2 |
44.45 |
25.4 |
82.55 |
7 |
180 F |
150.05000000000001 |
150 |
30.01 |
30.01 |
90.03 |
53.02 |
30.01 |
97.53 |
9.52 |
8A F |
158.5 |
171.05 |
25.41 |
41 |
92 |
66.25 |
25.4 |
104.8 |
9.5 |
8B F Spl. |
196 |
196 |
37.5 |
41 |
117.5 |
72 |
38 |
124 |
11 |
8B F Std. |
196 |
193.5 |
37 |
41 |
117.5 |
67 |
38 |
126.5 |
11 |
F1
E & I
TYPE |
A |
B |
C |
D |
E |
F |
G |
HOLE |
H |
I |
HOLE |
1 Ph. 16 |
73.23 |
114.4 |
19.07 |
19.07 |
38.07 |
19.09 |
54.160004 |
6.84 |
19.07 |
114.4 |
6.84 |
1 Ph. 43 |
101.5 |
152.389999 |
25.4 |
25.4 |
50.85 |
25.5 |
75.95 |
7 |
25.55 |
152.3899 |
7 |
1 Ph.8B EI |
155 |
235 |
41.25 |
41.25 |
76 |
38 |
117 |
11 |
38 |
235 |
11 |
3Ph. 15 EI |
63.53 |
127 |
25.4 |
25.4 |
25.45 |
25.45 |
38.08 |
8 |
25.45 |
127 |
9 |
3 Ph. 16 EI |
95 |
194 |
40 |
40 |
38 |
38 |
57 |
9.5 |
38 |
194 |
9.199993 |
3 Ph. 23 EI |
55 |
105.5 |
22.5 |
22.5 |
20 |
20 |
35 |
6.87 |
20 |
105.5 |
6.87 |
3 Ph. 32 EI |
79.5 |
158.80001 |
31.8 |
31.8 |
31.8 |
31.8 |
47.7 |
9.5 |
31.8 |
158.80001 |
9.5 |
3 Ph. 35 EI |
105.15 |
150 |
30 |
30 |
29.7 |
30.2 |
75.150006 |
10 |
30 |
150 |
10 |
Grade classification of CRGO steel
Grade (BIS nomenclature) |
Grade (conventional nomenclature) |
Thickness(mm) |
Max. Core loss(W/kg) 50Hz |
@1.5T |
@1.7T |
23HP85 |
23ZDKH |
0.23 |
0.6 |
0.85 |
23HP90 |
23M0-H |
0.23 |
0.64 |
0.9 |
23HP95 |
23M0-H |
0.23 |
0.66 |
0.95 |
23HP100 |
23M0-H |
0.23 |
0.68 |
1 |
23CG110 |
M3 |
0.23 |
0.7 |
1.1000000000000001 |
27HP95 |
27ZDKH |
0.27 |
0.66 |
0.95 |
27HP100 |
27M0-H |
0.27 |
0.7 |
1 |
27HP110 |
27M0-H |
0.27 |
0.78 |
1.1000000000000001 |
27CG120 |
M4 |
0.27 |
0.85 |
1.2 |
27CG130 |
M4 |
0.27 |
0.9 |
1.3 |
30HP105 |
30M0-H |
0.3 |
0.75 |
1.05 |
30CG130 |
M5 |
0.3 |
0.9 |
1.3 |
30CG140 |
M5 |
0.3 |
0.95 |
1.4 |
Tolerance chart for dimensions of CRGO laminations (as per IS 3024)
Attribute |
Attribute Range/Value |
Tolerance |
Width |
0 - 100 mm |
+0.00 / -0.15 mm |
|
100 mm - 230 mm |
+0.00 / -0.20 mm |
|
230 mm - 400 mm |
+0.00 / -0.30 mm |
|
400 mm - 750 mm |
+0.00 / -0.50 mm |
Length |
0 - 350 mm |
+0.00 / -0.30 mm |
|
350 mm - 1,000 mm |
+0.00 / -0.60 mm |
|
1,000 mm - 2,000 mm |
+0.00 / -1.00 mm |
|
2,000 mm - 3,000 mm |
+0.00 / -1.50 mm |
|
3,000 mm - 4,000 mm |
+0.00 / -2.00 mm |
Thickness |
0.23 - 0.27 mm |
+/- 0.025 mm |
|
0.30 - 0.35 mm |
+/- 0.030 mm |
Mitering Angle |
45 degrees |
+/- 5 minutes |
Burr Height |
0.18 - 0.23 mm |
10 microns |
|
0.23 - 0.30 mm |
15 microns |
|
0.30 - 0.35 mm |
20 microns |
Wave Factor |
Material width > 150mm, |
Max. 1.5% of width |
|
Flatness deviation |
|
Edge Camber |
Material width > 150mm |
Max. 0.8 mm |
|
|
for length of 1.5m |
Hole Dimension |
Up to 34 mm |
+/- 0.15 mm |