Single-float Buchholz relays

Double-float Buchholz relays

Type list of double-float Buchholz relays

Double-float Buchholz relays with threaded connection

Type 04

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
04
(BG 25)
(DG 25) 		Threaded
connection
G 1½" 		25 - - - - 16 185 235 90 4,2 ≤5000 KVA

Typ 21

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
21
(BG 25 S)
(-) 		Threaded
connection
G 1½" 		25 - - - - 16 185 235 90 3,6 ≤5000 KVA

Double-float Buchholz relays with flanged connection (round)

Type 05

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
05
(BF 25/6)
(-) 		Flange
4-hole 		25 100 75 60 12 12 185 235 90 4,4 ≤5000 KVA

Type 06

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
06
(BF 25/10)
(DR 25) 		Flange
4-hole 		25 115 85 68 14 18 200 235 90 4,8 ≤5000 KVA

Type 07

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
07
(BF 50/6)
(-) 		Flange
4-hole 		50 140 110 90 14 12 185 235 80 4,6 ≥5000 KVA ≤10000 KVA

Type 08

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
08
(BF 50/10)
(DR 50) 		Flange
4-hole 		50 165 125 102 18 16 195 250 80 5,9 ≥5000 KVA ≤10000 KVA

Type 09

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
09
(BF 80/10)
(-) 		Flange
4-hole 		80 200 160 138 18 15 195 265 80 6,2 ≥10000 KVA

Type 24

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
24
(BF 80/6)
(-) 		Flange
4-hole 		80 190 150 130 18 15 195 260 80 6,0 ≥10000 KVA

Type 23

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
23
(BF 25/10 S)
(-) 		Flange
4-hole 		25 115 85 68 14 18 200 235 90 4,4 ≤5000 KVA

Type 26

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
26
(BF80/10/8)
(DR 80) 		Flange
8-hole 		80 200 160 138 18 M16 15 195 265 80 6,2 ≥10000 KVA

Double-float Buchholz relays with flat flanged connection (round)

Type 27

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
27
(BF 80/10/8 G)
(DR 80) 		Flange
8-hole 		80 200 160 - 18 18 195 265 80 6,2 ≥10000 KVA

Type 28

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
28
(BF 80/10 G)
(-) 		Flange
4-hole 		80 200 160 - 18 18 195 265 80 6,2 ≥10000 KVA

Type 31

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
31
(BF 25/10 G)
(DR 25) 		Flange
4-hole 		25 115 85 - 14 20 200 235 90 4,8 ≤5000 KVA

Double-float Buchholz relays with flanged connection (square)

Type 10

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
10
(BF 80/Q)
(DQ 80) 		Flange
square
4-hole 		80 125 132 - 18 20 200 235 80 5,0 ≥10000 KVA

Double-float Buchholz relays with geometrical flange dimensions according to Chinese norm

Type 62

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
62
(BC 50)
(QJ 50) 		Flange
square
4-hole 		50 125 125 - 14 15 185 230 80 5,0 ≥5000 KVA ≤10000 KVA

Type 63

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
63
(BC 80)
(QJ 80) 		Flange
square
4-hole 		80 160 160 - 18 15 185 245 80 5,0 ≥10000 KVA

Double-float Buchholz relays with geometrical flange dimensions according to former French norm

Type 41

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
41
(NF 25) 		Flange
4-hole 		25 115 85 - 14 8 240 235 90 4,2 ≤5000 KVA

Type 42

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
42
(NF 50) 		Flange
4-hole 		50 165 125 - 18 15 240 250 80 5,1 ≥5000 KVA ≤10000 KVA

Type 43

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
43
(NF 80) 		Flange
4-hole 		80 200 160 - 18 15 240 265 80 5,5 ≥10000 KVA

Double-float Buchholz relays with geometrical flange dimensions according to former British standard

Type 51

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
51
(BS 25) 		Flange square
4-hole 		25 76 2,99 72 2,83 - - M10 M10 - - 127 5 235 9,25 90 3,54 3,7 ≤ 5000 KVA

Type 52

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
52
(BS 50) 		Flange
round
6-hole 		50 140 5,51 110 4,33 - - 12 0,47 12 0,47 185 7,28 235 9,25 80 3,15 4,8 ≥5000 KVA ≤10000 KVA

Type 53

Type Type of connection Pipe diameter DN (mm) Flange dimensions (mm) Device dimensions (mm) Weight without packing (kg) Suited for transformer ratings of
d1 d2 d3 d4 d5 f l h1 h2
53
(BS 80) 		Flange
round
6-hole 		80 160 6,30 130 5,12 - - 12 0,47 13 0,51 185 7,28 240 9,45 80 3,15 5,0 ≥10000 KVA
Contact

Please contact us! We are glad to advise you and help with your selection.

Otto-von-Guericke-Allee 12
39179 Barleben
Phone +49 (0) 392 03 / 79 - 0
Fax +49 (0) 392 03 / 53 30
Email sales(at)emb-online(dot)de

Ordering data/Type code

Explanations of the ordering key you find here.