Transformer Protection Relays (Buchholz Principle) - EMB Gmbh
Transformer Protection Relays (Buchholz Principle) - EMB Gmbh
Transformer Protection Relays (Buchholz Principle) - EMB Gmbh
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7.6. Double-float <strong>Buchholz</strong> relays with geometrical flange dimensions<br />
according to former British standard<br />
h1<br />
Type<br />
Internal description<br />
DIN description<br />
51<br />
(BS 25)<br />
(-)<br />
52<br />
(BS 50)<br />
(-)<br />
53<br />
(BS 80)<br />
(-)<br />
Type of connection<br />
Flange<br />
square<br />
4-hole<br />
Flange<br />
6-hole<br />
Flange<br />
6-hole<br />
Figure 23 - Dimensional drawing, type 51<br />
h1<br />
80<br />
h2<br />
80<br />
h2<br />
250<br />
300<br />
350<br />
cm 3<br />
l<br />
250<br />
300<br />
350<br />
cm 3<br />
l<br />
Figure 24 - Dimensional drawing, type 52, 53<br />
f<br />
b<br />
Pipe<br />
diameter<br />
DN (mm)<br />
Flange dimensions<br />
(mm)<br />
Device dimensions<br />
(mm)<br />
d1 d2 d3 d4 d5 f l h1 h2<br />
25<br />
50<br />
80<br />
-<br />
-<br />
140<br />
5,51<br />
160<br />
6,30<br />
150<br />
d1<br />
d3<br />
b<br />
170<br />
d1<br />
d3<br />
d2<br />
72<br />
2,83<br />
110<br />
4,33<br />
130<br />
5,12<br />
90°<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
d5<br />
M10<br />
M10<br />
12<br />
0,47<br />
12<br />
0,47<br />
d5<br />
-<br />
-<br />
12<br />
0,47<br />
13<br />
0,51<br />
R143<br />
127<br />
5<br />
185<br />
7,28<br />
185<br />
7,28<br />
235<br />
9,25<br />
235<br />
9,25<br />
240<br />
9,45<br />
90<br />
3,54<br />
80<br />
3,15<br />
80<br />
3,15<br />
Weight<br />
(kg)<br />
Suited for<br />
transformer<br />
ratings of<br />
3,7 ≤ 5000 KVA<br />
4,8<br />
≥5000 KVA<br />
≤10000 KVA<br />
5,0 ≥10000 KVA<br />
17
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