7/29/2019 Bussmann High Voltage Fuses Catalogue
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For more information visit our website www.bussmann.com1
High Voltage Fuse Technology
End cap Porcelain barrel
Fuse elements Granular Quartz Striker coil Expelled striker
Star core Moisture tight seal
GranularQuartz
Fuse elements
Porcelain barrel
Cross Section
Current Limiting
For the protection of equipment operating above 1000 volts AC
Silver ceramicpoint contact
Star coreStriker coil
Current l imit ing HV fuse l inks spl i t into three
internationally recognised types: back-up (or partialrange) fuse links, which will interrupt any currentfrom their rated breaking capacity down to a minimumbreaking current specified by the manufacturer; andgeneral purpose fuse links, which will interrupt allcurrents from rated breaking capacity down to acurrent that w ill melt the elements within one hour.A third type is the full range fuse. This term appliesto fuse links that can interrupt any current belowthe rated breaking capacity that melts the fuseelements satisfactorily.
Current limiting back-up fuse links are the closest in
construction to LV cartridge types. However, a longer stripelement with many more restrictions is necessary toproduce the large number of series arcs needed tointerrupt a high voltage. Fuse manufacturers achievethis by coiling the element around a ceramic core with astar shaped cross section. In this way, a 1m long elementcan be fitted into a 250mm long fuse body. If the adjacentcoils are too close, there will be a flashover betweenthem and this sets a practical limit on how long anelement can be crammed into a particular cartridge, andhow many elements can be used in parallel.
Like an LV cartridge fuse link, an HV fuse link of thistype has a ceramic body.
Many HV current limiting fuse links are also fitted witha striker mechanism. This not only provides the user
with a visual indication that the fuse link has operated,but can also be used to operate other switchgear. Inthis way, a fuse on a single phase system can cut off allthree phases if a fault occurs.
Striker mechanisms are driven by explosive charges orcompressed springs. Both are triggered by a thin fusewire running the length of the fuse, usually through thecentre of the star shaped core. The wire is connected
in parallel with the elements, so a current flowsthrough it when the elements melt. The currentheats up the wire and detonates the explosivecharge, or melts the wire andreleases the spring,pushing the striker pin out of the fuse links end
cap. A lock washer mechanism makes it impossibleto push the pin back into the fuse body.
There are several variations on this design for specificapplications. For example, the elements in three-phase motor protect ion fuse links are corrugated towithstand the cyclical mechanical stresses inducedby the high starting and stopping currents drawnby the motor.
CABLE JOINTS, CABLE TERMINATIONS, CABLE GLANDS, CABLE CLEATSFEEDER PILLARS, FUSE LINKS, ARC FLASH, CABLE ROLLERS, CUT-OUTS
11KV 33KV CABLE JOINTS & CABLE TERMINATIONSFURSE EARTHINGwww.cablejoints.co.uk
Thorne and Derrick UK
Tel 0044 191 490 1547 Fax 0044 191 477 5371Tel 0044 117 977 4647 Fax 0044 117 9775582
7/29/2019 Bussmann High Voltage Fuses Catalogue
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2
High Voltage Fuse Technology
For more information visit our website www.bussmann.com
M- effect
Bussmann high voltage fuse links include M-effect as a design feature to enhance performance. M-effect
(named after its discoverer, Prof. Metcalf, in the late 1930s) consists of applying overlay spots of special low
melting alloy onto the fuse element strips. Its effect is to ensure that the fuse link runs cooler in service and
that the maximum temperature reached during fuse operation is kept down to a modest 160 deg. C
(compared with 300 - 400 deg C for fuse links which do not employ this feature).
M-effect has been in widespread use in both low voltage and high voltage fuse links of British design for
many years and is now coming into use in many other countries. Cooler running M-effect fuse links have
longer service life since lower surface temperature on the elements ensures against long term embrittlement
of the material. The M-effect spots are stable and have been proved by many tests to remain inert for
periods of 30 years or more.
The low maximum operating temperature of M-effect fuse links ensures safe operation of Back-up types in
striker tripped switchgear under low fault conditions. Whereas non M-effect types are known to have a risk
of body fracture because of their much higher body temperature under such conditions. The low maximum
operating temperature also ensures against damage to heat sensitive fuse enclosures such as cast resin
fuse pods.
In short, M-effect fuse links are safer, give better protection and are longer lasting than alternative designs
which do not employ this valuable feature.
Essentially, non-current limiting fuse links have short
elements and incorporate some means of lengtheningthe arc after the element melts, extinguishing the arcand preventing re-ignition. There are two distinct types:expulsion fuse links and liquid fuse links.Expulsion fuses are an effective way of protectingoverhead distribut ion lines and transformers. They aredesigned for outdoor use only and comprise a tin orcopper fuse element in series with a flexible braid in atube. The tube forms one side of a triangle, with alatched connection at the top and a hinge at thebottom. The braid emerges from one end of the fuselink and is held in tension by a spring.When the element melts, the braid is no longer undertension, the latch is released and the fuse swings
downwards under gravity, breaking the circuit. As the
fuse swings downwards, the arc is lengthened,extinguished and prevented from restriking.Liquid fuse links are based on early non-currentlimiting fuse links which use liquids to quench the arc.The fuse element is anchored to the top ferrule of aglass tube filled with a quenching liquid - usually ahydrocarbon. The rest of the tube is filled with aspring that holds the element - or a strain wire in veryhigh voltage fuse links - in tension.When the element melts, the spring pulls the twoparts of the element apart, extending the arc andquenching it in the liquid.
Non- Current Limiting
For the protection of equipment operating above 1000 volts AC
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3
DIN - Fuse Links
Fuse Links comply with DIN dimensionalstandard DIN43625.
F range, high performance full range fuse link.
S range, high performance back-up fuselink, with striker tripping.
A range, including high current ratingback-up fuse link.
Comply with IEC 60282-1 and VDE 0670 part 4.
Wide variety of ratings, 3.6 kV to 36 kV.
Versions suitable for indoor and outdoor use.
Motor circuit fuse link option.
Bussmann DIN S Fuse Links
The time current characteristics of the S range is optimised to ensure improved discrimination with upstream devicesand to give fast clearance of earth faults in the secondary terminal zones. The breaking performance with low overcurrents is adequate to cater for all normal distribution applications, where low voltage fuse links on the secondary sidetake care of low overload faults, leaving the high voltage fuse links to clear major faults ahead of LV protection. The fuselinks are suitable for use even where there is no secondary LV protection, provided that they are used in fuse switchesfitted with instantaneous striker tripping.
Bussmann DIN F Fuse Links
The F range fuse links have full range clearing capability. Bussmann F types are designed to clear all overloads rightdown to fuses rated current in accordance with latest IEC 282-1 requirements. They are thus suitable for use as a soleform of protection. F range time current characteristics are especially advantageous for transformer protectionapplications.
Bussmann DIN A Fuse Links
This earlier, well proven design, has values of minimum breaking current between the S and F range including highercurrent ratings.
For more information visit our website www.bussmann.com
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4
DIN - Fuse Links
Part Number
CurrentRating
Length Diameter
Un
kV
In
A
I1
kA mmm W
A2s
mm
WeightBreakingCapacity
I3
A
MinimumBreaking Current
Cold resistance and watts lossin free air at rated current
JouleIntergral
(I2t)
7.2SDLSJ6.37.2SDLSJ107.2SDLSJ167.2SDLSJ207.2SDLSJ257.2SDLSJ31.57.2SDLSJ407.2SDLSJ507.2SDLSJ63
7.2SFLSJ807.2SFLSJ1007.2SFLSJ1257.2SFLSJ160
12SDLSJ6.3
12SDLSJ1012SDLSJ1612SDLSJ2012SDLSJ2512SDLSJ31.512SDLSJ4012SDLSJ5012SDLSJ63
12SFLSJ5012SFLSJ6312SFLSJ8012SFLSJ100
12SKLSJ12512SXLEJ16012SXLEJ200
15.5SFMSJ10015.5SKMSJ125
17.5SDLSJ6.317.5SDLSJ10
17.5SDLSJ1617.5SDLSJ2017.5SDLSJ2517.5SDLSJ31.517.5SDLSJ40
17.5SFLSJ31.517.5SFLSJ4017.5SFLSJ50
17.5SDMSJ6.317.5SDMSJ1017.5SDMSJ1617.5SDMSJ2017.5SDMSJ2517.5SDMSJ31.517.5SDMSJ40
17.5SFMSJ5017.5SFMSJ6317.5SFMSJ80
24SDMSJ6.3
24SDMSJ1024SDMSJ1624SDMSJ2024SDMSJ2524SDMSJ31.524SDMSJ40
24SFMSJ4024SFMSJ5024SFMSJ6324SFMSJ7124SHMEJ8024SHMEJ10024SKMEJ12524SXMEJ160
36SDQSJ3.1536SDQSJ6.336SDQSJ1036SDQSJ1636SDQSJ2036SDQSJ25
36SFQSJ31.536SFQSJ4036SFQSJ5036SXQEJ63
7.27.27.27.27.27.27.27.27.2
7.27.27.27.2
12
1212121212121212
12121212
121212
15.515.5
17.517.5
17.517.517.517.517.5
17.517.517.5
17.517.517.517.517.517.517.5
17.517.517.5
24
242424242424
2424242424242424
363636363636
36363636
6.310162025
31.5405063
80100125160
6.3
10162025
31.5405063
506380100
125160200
100125
6.310
162025
31.540
31.54050
6.310162025
31.540
506380
6.3
10162025
31.540
4050637180100125160
3.156.310162025
31.5405063
404040404040404040
40404040
50
5050505050505050
50505050
506363
2525
35.535.5
35.535.535.535.535.5
35.535.535.5
35.535.535.535.535.535.535.5
353535
50
505050505050
5050505063636363
2035.535.535.535.535.5
35.535.535.520
2031494980100114143180
264338375525
20
2835729090128196275
160227256446
870500610
707990
2319
5980100118148
118132225
16275780100100143
180240270
19
28478084105140
119225306350300350420320
-23357098112
116178255280
20599.765.148.932.626.016.012.98.14
6.014.653.602.73
285
14381.454.643.732.821.615.112.1
17.112.18.975.61
4.604.303.80
8.235.61
313185
10469.255.441.431.1
30.321.917.3
50921511279.863.847.931.6
25.017.813.1
489
28716579.362.046.534.0
38.027.121.617.720.518.016.714.0
-68440216511798.0
73.452.436.835.0
111923272836364645
54647997
14
1826283543495975
61698883
115200330
119126
1523
3438485876
375162
26283738526166
88102128
24
356038495679
8596128134250350
171
279
-3444526285
96116133271
292292292292292292292292292
292292292292
292
292292292292292292292292
292292292292
292292292
442442
292292
292292292292292
292292292
442442442442442442442
442442442
442
442442442442442442
442442442442442442442442
537537537537537537
537537537537
4.8X101
2.5X102
5.5X102
9.7X102
5.7X102
8.9X102
2.0X102
3.2X102
8.0X102
5.0X103
9.1X103
1.5X104
3.0X104
7.0X101
3.1X102
9.8X102
5.7X102
8.9X102
1.6X103
3.2X103
1.3X103
2.3X103
5.2X103
1.0X104
1.9X104
1.4X104
2.8X104
1.1X105
1.5X105
1.2X104
2.4X104
4.8X101
2.8X102
2.9X102
5.7X102
8.9X102
5.1X102
8.0X102
2.6X103
5.1X103
8.1X103
4.8X101
3.1X102
2.9X102
5.7X102
8.9X102
1.6X103
3.2X103
5.2X103
1.0X104
1.9X104
8.1X101
3.1X102
9.8X102
8.1X102
1.3X103
2.1X103
3.2X103
5.1X103
8.1X103
3.8X103
5.0X103
1.7X104
2.8X104
2.4X104
4.4X104
-
1.0X102
3.1X102
4.6X102
8.9X102
1.2X103
2.1X103
4.1X103
8.3X103
1.1X104
6.5X102
2.7X103
8.2X103
1.1X104
8.0X103
1.0X104
2.2X104
3.2X104
7.5X104
6.5X104
1.1X105
1.7X105
3.1X105
6.5X102
2.7X103
8.6X103
5.1X103
8.1X104
1.5X104
2.7X104
3.2X104
5.7X104
4.1X104
8.8X104
1.5X105
2.2X105
2.3X105
5.0X105
6.5X105
1.4X105
2.2X105
6.1X102
4.0X103
2.0X1034.4X103
6.6X103
1.1X104
1.8X104
1.9X104
3.8X104
6.0X104
6.0X102
3.8X103
1.2X104
6.7X103
1.1X104
2.0X104
3.6X104
5.5X104
1.2X105
1.9X105
1.3X103
5.5X103
1.5X104
1.1X104
2.0X104
2.9X104
4.4X104
6.9X104
9.0X104
5.0X104
6.6X104
8.4X104
9.3X104
8.7X104
1.7X105
-1.2X103
3.6X103
5.1X103
8.2X104
1.5X104
2.3X104
3.9X104
8.1X104
6.2X104
50.850.850.850.850.850.850.850.850.8
76.276.276.276.2
50.8
50.850.850.850.850.850.850.850.8
76.276.276.276.2
76.28888
76.276.2
50.850.8
50.850.850.850.850.8
76.276.276.2
50.850.850.850.850.850.850.8
76.276.276.2
50.8
50.850.850.850.850.850.8
76.276.276.276.264647888
50.850.850.850.850.850.8
76.276.276.288
1.631.631.631.631.631.631.631.631.63
3.13.13.13.1
1.63
1.631.631.631.631.631.631.631.63
3.13.13.13.1
3.13.73.7
4.54.5
1.631.63
1.631.631.631.631.63
3.13.13.1
2.22.22.22.22.22.22.2
4.54.54.5
2.2
2.22.22.22.22.22.2
4.54.54.54.53.13.13.74.2
2.92.92.92.92.92.9
6.06.06.06.5
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
Selection Tables
Table of ratings for S range 7.2 - 36kV to DIN dimensions
Ratingat64%
For more information visit our website www.bussmann.com
7/29/2019 Bussmann High Voltage Fuses Catalogue
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5
DIN - Fuse Links
3.6ADOSJ6.33.6ADOSJ103.6ADOSJ163.6ADOSJ203.6ADOSJ253.6ADOSJ31.53.6ADOSJ40
3.6ADLSJ6.33.6ADLSJ103.6ADLSJ163.6ADLSJ203.6ADLSJ253.6ADLSJ31.53.6ADLSJ40
12AILSJ100
17.5AILSJ4017.5AILSJ5017.5AILSJ63
17.5AIMSJ100
24AFMSJ5024AFMSJ6324AIMSJ71
3.63.63.63.63.63.63.6
3.63.63.63.63.63.63.6
12
17.517.517.5
17.5
242424
6.310162025
31.540
6.310162025
31.540
100
405063
100
506371
40404040404040
40404040404040
31.5
252525
25
202020
13314949106106106
13132031106106106
176
7898156
176
137125176
15879.250.838.128.919.211.6
15895.663.345.928.719.111.4
5.03
26.321.112.3
7.33
29.523.615.1
9111821252626
9132225252625
70
587368
102
102130106
192192192192192192192
292292292292292292292
292
292292292
442
442442442
4.5X101
2.3X102
5.5X102
9.8X102
1.3X102
2.9X102
8.0X102
4.5X101
1.3X102
3.0X102
6.3X102
1.3X102
2.9X102
8.0X102
1.4X104
1.3X103
2.0X103
5.0X103
1.4X104
1.8X103
3.2X103
6.3X103
1.9X102
9.7X102
2.4X103
4.2X103
1.2X103
2.7X103
7.5X103
1.9X102
5.4X102
1.3X103
2.7X103
1.2X103
2.7X103
7.5X103
2.0X105
1.8X104
2.7X104
7.0X104
2.0X105
2.9X104
4.5X104
8.5X104
50.850.850.850.850.850.850.8
50.850.850.850.850.850.850.8
76.2
76.276.276.2
76.2
76.276.276.2
1.11.11.11.11.11.11.1
1.631.631.631.631.631.631.63
3.3
3.33.33.3
4.5
4.54.54.5
Part Number
CurrentRating
Length Diameter
Un
kV
In
A
I1
kA mmm W
A2s
mm
WeightBreakingCapacity
I3
A
MinimumBreaking Current
Cold resistance and watts lossin free air at rated current
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
Selection Tables
Table of ratings for A range 3.6 - 24kV to DIN dimensions
Table of ratings for F range 12 - 24kV to DIN dimensions
12FDLSJ6.312FDLSJ1012FDLSJ1612FDLSJ2012FDLSJ2512FDLSJ31.5
12FFLSJ4012FFLSJ5012FFLSJ6312FXLSJ8012FXLSJ100
24FDMSJ6.324FDMSJ1024FDMSJ16
24FDMSJ2024FDMSJ2524FDMSJ31.5
24FFMSJ2524FFMSJ31.524FFMSJ4024FFMSJ45
121212121212
1212121212
242424
242424
24242424
6.310162025
31.5
40506380100
6.31016
202531.5
2531.54045
505050505050
5050505050
35.535.535.5
35.535.535.5
35.535.535.535.5
6.310162025
31.5
40506380100
6.31016
202531.5
2531.54045
20811655.439.631.226.4
19.714.812.47.945.64
437218118
82.254.748.6
58.648.838.431.4
101517202636
4251727282
212939
434871
47708592
292292292292292292
292292292292292
442442442
442442442
442442442442
6.9X101
2.2X102
8.8X102
1.7X103
2.8X103
2.6X103
3.8X103
6.8X103
5.1X103
2.2X104
4.2X104
6.8X101
2.7X102
8.2X102
1.6X103
3.4X103
3.2X103
3.4X103
4.7X103
7.6X103
7.2X103
6.3X102
2.1X103
3.9X103
7.6X103
1.3X104
1.3X104
3.8X104
5.6X104
5.4X104
1.1X105
2.0X105
5.4X102
2.1X103
2.7X103
5.1X103
1.2X104
1.2X104
1.1X104
1.5X104
2.5X104
3.0X104
50.850.850.850.825.850.8
76.276.276.28888
50.850.850.8
50.850.850.8
76.276.276.276.2
1.631.631.631.631.631.63
3.163.163.16
44
2.22.22.2
2.22.22.2
4.54.54.54.5
Part Number
CurrentRating
Length Diameter
Un
kV
In
A
I1
kA mmm W
A2s
mm
WeightBreakingCapacity
I3
A
MinimumBreaking Current
Cold resistance and watts lossin free air at rated current
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
Notes
a) 17.5kV fuse links in 10/12 dimensions are offered, since someswitchgear in the 10/12 series is suitable for use at higher voltages.
b) Fuse links listed are normally for indoor use but versions suitable
for outdoor use are olso available in the same ratings anddimensions. For outdoor versions of the S range, replace the Swith a T when ordering - for example TDLSJ
c) * All the fuse link code references listed in the proceeding tablesare for striker fitted versions, for non-striker versions pleasereplace the letter S with the letter N in the code - for exampleSDLNJ. For further information on our parts referencing system,please refer to section 10 of this catalogue.
For more information visit our website www.bussmann.com
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6
DIN - Fuse Links
6.3A
10A
16A
20A
25A
31.5A
40A
50A
63A
80A
100
A
125
A
160
A
5
Time current characteristics for 7.2kV DIN Fuse Links, S range, fuse types SDL, SFL
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
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7
DIN - Fuse Links
6.3A
10A
16A
20A
25A
31.5A
40A
50A(S
DL)
63A(S
DL)
80A
100A
125A
160A
200A
5
Time current characteristics for 12kV DIN Fuse Links, S range, fuse types SDL, SFL, SKL and SXL
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
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8
6.3A
10A
16A
20A
25A
31.5A(
SDM)
40A(SDM)
50A(SFM)
63A
80A/75
A
100A(15.5kVONLY)
125A(15.5kVONLY)
5
DIN - Fuse Links
Time current characteristics for 15.5, 17.5kV DIN Fuse Links, S range, fuse types SDL, SFL, SDM, SFM and SKM
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
For more information visit our website www.bussmann.com
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9
DIN - Fuse Links
Time current characteristics for 24kV DIN Fuse Links, S range, fuse types SDM, SXM and SFM
For more information visit our website www.bussmann.com
6.3A
10A
16A
20A
25A
31.5A
40A(SDM)
50A
63A
71A
80A
100A
125A
160A
5
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
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10
DIN - Fuse Links
Time current characteristics for 36kV DIN Fuse Links, S range, fuse types SDQ, SFQ and SXQ
5
6.3A
10A
16A
20A
25A
31.5A
40A
50A
63A
(SXQ)
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
For more information visit our website www.bussmann.com
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11
DIN - Fuse Links
Time current characteristics for 12kV DIN Fuse Links, F range, fuse types FDL, FFL and FXL
1HOUR
100A
80A
63A
50A
40A
31.5A
25A
20A
16A
10A
6.3A
5
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
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12
DIN - Fuse Links
Time current characteristics for 24kV DIN Fuse Links, F range, fuse types FDM and FFM
1HOUR
45A
40A
31.5A
25A
20A
16A
10A
6.3A
5
43
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
For more information visit our website www.bussmann.com
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13
DIN - Fuse Links
Dimensions (mm)
Please refer to the how to order page 61of this catalogue for further details of how orderingcodes are formatted
Force(N)
Fo
rce(N)
60
50
40
0
20
0
05 10 15 20 25 30
Travel (mm)Travel (mm)
PRODUCT CODE
ADOSJSDOSJADLSJFDLSJSDLSJFDMSJSDMSJSDQSJSFOSJAILSJFFLSJSFLSJ
SKLSJAIMSJFFMSJSFMSJSKMSJSFQSJSXLSJSXMSJSXQSJFXLSJ
A
192192292292292442442537192292292292
292442442442442537292442537292
D
515151515151515176767676
76767676767688888888
60
70
80
90
50
40
30
20
10
05 10 15 20 25 30
26mm maximum travel after operation
Striker characteristics
E = Spring Striker 80N to IEC 60282-1designation medium
S = Spring Striker 50N to DIN 43625and IEC 60282-1 designation medium
For more information visit our website www.bussmann.com
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14
DIN - Fuse Links
Min Max Min Max Min Max
Transformer Primary Voltage
Tranformer
Rating
(kVA)
10(kV)
20(kV)
30(kV)
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
501001251602002503154005006308001000
8012516020025031540050063080010001250
10162025
31.540506380100125125
101625
31.531.550638080100125125
6.3101016162025
31.540505063
6.31616162025
31.54050505071
3.156.36.3101616162025
31.54050
3.1510101016162025
31.5404050
Low Voltage
NH Fuse Size
gG/gL
(A)
General guide to the selection of DIN Fuse Links for use in the primary circuit of three phase transformers
1. The fuse link should withstand transformer magnetising inrushcurrents, taken as 12 times full load current for 0.1 seconds.
2. The fuse link should discriminate with the rating of secondaryfuse link stated or where only individual cable exit protectionexists, the highest rating likely to be used.
3. The fuse link should operate within 2 seconds for transformerscomplying with IEC60076 - 5 in respect of impedance, voltageand short circuit withstand current.
4. The fuse link should operate reasonably quickly in the event of atransformer internal fault, or an earth fault in the secondaryterminal zone of the transformer.
5. In the case where there is no secondary fuse link for overloadprotection, the minimum recommended HV fuse link ratingapplies to the use of fuse links in encapsulated enclosures wherepermissible continuous overload is generally limited to 20% oftransformer full load current. However if greater overload currentsare permissible a higher rating of fuse link may be required.Where the fuse link is used in open air or condit ions of unrestrictedventilation a higher permissible overload may be possible.
6. In most cases more than one rating of HV fuse link is recommendedfor a particular transformer size. Choice of fuse link will then
depend on which fuse offers the best protection e.g. having one fusefor several transformer sizes.
Recommendations for other voltages are available on request.
For HV DIN Fuse Links type SXLSJ, SDLSJ, SFLSJ, SKLSJ, SDMSJ, SFMSJ, SXMSJ SDQSJ, SFQSJ. Selection guideusing LV Fuse Links operating class gG/gL on the low voltage side for overload protection of the transformer.
Selection of these HV fuse links has been based on the following:
Min Max Min Max Min Max
Transformer Primary Voltage
TranformerRating
(kVA)
10(kV)
20(kV)
30(kV)
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
50100125160200250315400500630
8001000125016002000
6.31616162025
31.5405063
80100125160200
101625
31.531.550638080
100
125125200200200
6.36.310101616202025
31.5
40506371100
6.31616162025
31.5405050
5071100100160
3.156.36.36.3101016161620
2531.5405063
3.1510101016161625
31.540
4050506363
For HV DIN Fuse Links type SXLSJ, SDLSJ, SFLSJ, SKLSJ, SDMSJ, SFMSJ, SXMSJ SDQSJ, SFQSJ. Selection guideusing LV Fuse Links operating class gG/gL on low voltage side for individual cable exit protection.
For more information visit our website www.bussmann.com
Selection
Table
forBack-up
Fuse
Links
Selection
Table
forBack-up
Fus
e
Links
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15
DIN - Fuse Links
Min Max Min Max
Transformer Primary Voltage
TranformerRating
(kVA)
10(kV)
20(kV)
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
501001251602002503154005006308001000
6.31016162025
31.540506380100
102025
31.540506380100100100100
6.36.36.3101016162025
31.54045
6.31016162025
31.54045454545
General guide to the selection of DIN Fuse Links for use in the primary circuit of three phase transformers
For HV DIN fuse links type FDLSJ, FFLSJ, FXLSJ, FDMSJ, FFMSJ. Selection guide using LV fuse links operatingclass gG/gL on low voltage side for individual cable exit protection.
For more information visit our website www.bussmann.com
Min Max Min Max Min Max
Transformer Primary Voltage
TranformerRating
(kVA)
10(kV)
20(kV)
30(kV)
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
Low Voltage
NH Fuse Size
gTr
(A)
100125160200250315400500
6308001000
100125160200250315400500
6308001000
16162025
31.5405063
80100125
161625
31.540506380
100125160
10101616162525
31.5
406363
101016162525
31.540
506380
6.310101616202525
31.54040
6.3101016202525
31.5
405050
For HV DIN fuse links type SXLSJ, SDLSJ, SFLSJ, SKLSJ, SDMSJ, SFMSJ, SXMSJ SDQSJ, SFQSJ. Selection guideaccording to DIN VDE 0670 part 402 using LV fuse links operating class gTr on low voltage side for overloadprotection of the transformer.
1. The fuse link should withstand transformer magnetising inrushcurrents, taken as 12 times full load current for 0.1 seconds.
2. The fuse link should discriminate with the rating of secondaryfuse link stated or where only individual cable exit protectionexists, the highest rating likely to be used.
3. The fuse link should operate within 2 seconds for transformerscomplying with IEC60076 - 5 in respect of impedance, voltageand short circuit withstand current.
4. The fuse link should operate reasonably quickly in the event of atransformer internal fault, or an earth fault in the secondaryterminal zone of the transformer.
5. In the case where there is no secondary fuse link for overloadprotection, the minimum recommended HV fuse link ratingapplies to the use of fuse links in encapsulated enclosures wherepermissible continuous overload is generally limited to 20% oftransformer full load current. However if greater overload currentsare permissible a higher rating of fuse link may be required.Where the fuse link is used in open air or condit ions of unrestrictedventilation a higher permissible overload may be possible.
6. In most cases more than one rating of HV fuse link is recommendedfor a particular transformer size. Choice of fuse link will then
depend on which fuse offers the best protection e.g. having one fusefor several transformer sizes.
Recommendations for other voltages are available on request.
Selection of these HV fuse links has been based on the following:
Selection
Table
forBack-up
Fuse
Links
Selection
Table
forFullRangeF
use
Links
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16
DIN - Fuse Links
Min Max Min Max
Transformer Primary Voltage
TranformerRating
(kVA)
10(kV)
20(kV)
Rated Current of theHigh Voltage Fuse Link Rated Current of theHigh Voltage Fuse Link
1001251602002503154005006308001000
1001251602002503154005006308001000
101616202540405080100100
2025
31.540506380100100100100
6.3101016202025
31.54045-
1016162025
31.540454545-
Low Voltage
NH Fuse Size
gTr
(kVA)
General guide to the selection of DIN Fuse Links for use in the primary circuit of three phase transformers
For fuse links type FDLSJ, FFLSJ, FXLSJ, FDMSJ, FFMSJ. Selection guide according to DIN VDE O670 part 402using LV fuse links operating class gTr on low voltage side for overload protection of the transformer.
Min Max Min Max
Transformer Primary Voltage
TranformerRating
(kVA)
10(kV)
20(kV)
Rated Current of theHigh Voltage Fuse Link
Rated Current of theHigh Voltage Fuse Link
50100125160200250315400500
630800
80125160200250315400500630
8001000
6.310161620
31.5404050
100100
6.3101620
31.540406363
100100
6.310101616162025
31.5
40-
6.3101016162020
31.540
45-
Low Voltage
NH Fuse Size
gG/gL
(A)
For HV DIN fuse links type FDLSJ, FFLSJ, FXLSJ, FDM SJ, FFMSJ. Selection guide using LV fuse links operatingclass gG/gL on low voltage side for overload protection of the transformer.
1. The fuse link should withstand transformer magnetising inrushcurrents, taken as 12 times full load current for 0.1 seconds.
2. The fuse link should discriminate with the rating of secondaryfuse link stated or where only individual cable exit protectionexists, the highest rating likely to be used.
3. The fuse link should operate within 2 seconds for transformerscomplying with IEC60076 - 5 in respect of impedance, voltageand short circuit withstand current.
4. The fuse link should operate reasonably quickly in the event of atransformer internal fault, or an earth fault in the secondaryterminal zone of the transformer.
5. In the case where there is no secondary fuse link for overloadprotection, the minimum recommended HV fuse link ratingapplies to the use of fuse links in encapsulated enclosures wherepermissible continuous overload is generally limited to 20% oftransformer full load current. However if greater overload currentsare permissible a higher rating of fuse link may be required.Where the fuse link is used in open air or condit ions of unrestrictedventilation a higher permissible overload may be possible.
6. In most cases more than one rating of HV fuse link is recommendedfor a particular transformer size. Choice of fuse link will then
depend on which fuse offers the best protection e.g. having one fusefor several transformer sizes.
Recommendations for other voltages are available on request.
Selection of these HV fuse links has been based on the following:
For more information visit our website www.bussmann.com
Selection
Table
forFullRange
Fuse
Links
Selection
Table
forFullRangeF
use
Links
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17
Motor Fuse Links
Bussmann Motor Fuse Links
The Bussmann range of motor fuse links are designed to meet the specific requirements necessary for motor
protection. During the starting cycle of direct on-line motors, the fuse elements will reach a considerably higher
temperature than during normal operation; (this is due to the the high amount of current the motor will draw as it starts,
typically, 6 times its normal load current value). This results in expansion and contraction of the fuse elements andcould cause premature operation of the fuse.
Bussmann motor fuse links encompass an advanced design to minimise this effect. This therefore, negates the need
to over specify the fuse rating due to high values of of motor starting current.
Bussmann motor fuse links operate extremely quickly under heavy fault currents, resulting from the time / current
characteristic. Low power dissipation ensures low temperature rise, important in multi-tier starters for example.
Switching (Arc), voltages are lower than permitted values, therefore, 5.5kV fuses are also suitable for 4.8kV and 2.4kV circuits.
Motor fuse links comply withIEC60282-1, IEC644 and BS5907.
Available in DIN 43625 and BS2692 dimensions.
Sold in a wide range of ratings from:3.6 kV 5 to 450 A7.2 kV 5 to 355 A
North American dimensioned products alsoavailable. 2R to 24R ratings.
DIN Dimensioned Motor Fuse Links
British Standard Motor Fuse Links North American M otor Fuse Links
For more information visit our website www.bussmann.com
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Application
Fuse Links provide short circuit protection in motor circuits to both the motor starter and cables from the starter to the motor.Overload protect ion is provided by the motor starter, generally by an overload relay and contactor. Combination striker tripping
may also form part of associated equipment which houses the fuse links and motor starters.
Application Procedure
For any motor the fuse current rating is determined by magnitude and duration of starting current, except in a few situationswhere the starting currents are very light. The fuse current rating should therefore be selected as follows:
Direct-on- line Starting
In the absence of specific information the starting current can usually be taken to be six times the motors full load current.The starting time will depend on the type of the drive but will be approximately as follows:
Pump Motors - 6 seconds
Mill Motors - 10 to 15 seconds
Fan Motors - 60 seconds
These are average values and the appropriate figures for starting current and starting time for actual installation should be obtainedwherever possible.
Multiply the starting current by 1.7 and using this value of current and the starting time, (it is recommended that a minimumtime of 5 seconds be adopted), plot this point on the time-current characteristics of the fuse link. The correct current ratingof the fuse is then chosen as being the one immediately to the right of the point so plotted. The chosen fuse must also havea current rating of at least 1.3 times the full-load current of the associated motor.
The rating chosen will be adequate for normal applications where the associated motor is not started more than twice in givenperiod of one hour.
For applications using more frequent starting duties, a greater derating factor must be applied as shown in the following table.
Assisted Starting
A similar method of fuse selection may be used as for direct-on-line starting (see above), but it must be noted that thenormal running current of the motor is likely to be closer in value to the nominal current rating of the fuse than for direct-on-line applications.
The rating of fuse chosen will need to be appreciably greater than the motor running current to allow for restricted cooling insidecontrol gear cubicles, particularly where multi-tier starters are involved. In case of doubt refer to Bussmann for further guidance.
Note
For applications involving more frequent starting duties than 16 times per hour or where unusual duty cycles are involved,consult Bussmann application engineers for advice.
18
Motor Fuse Links
Maximum 2 starts per hour - Derating factor 1.7 Maximum 8 starts per hour - Derating factor 2.1
Maximum 4 starts per hour - Derating factor 1.9 Maximum 16 starts per hour - Derating factor 2.4
For more information visit our website www.bussmann.com
7/29/2019 Bussmann High Voltage Fuses Catalogue
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19
Motor Fuse Links
WDOH6 fuse links also available in the range 6.3 to 40A as code ADOH6.
3.6WJON653.6WJON66.33.6WJON6103.6WJON6163.6WJON6203.6WJON6253.6WJON631.53.6WJON6403.6WJON650
3.6WDOH6503.6WDOH6633.6WDOH6803.6WDOH61003.6WDOH6125
3.6WFOH61603.6WFOH6200
3.6WDFHO503.6WDFHO633.6WDFHO803.6WDFHO1003.6WDFHO125
3.6WFFHO1603.6WFFHO200
3.6WKFHO2503.6WKFHO3153.6WKFHO3553.6WKFHO400
3.6WFGHO31.53.6WFGHO403.6WFGHO503.6WFGHO633.6WFGHO803.6WFGHO1003.6WFGHO1253.6WFGHO1603.6WFGHO2003.6WFGHO250
3.6WKGHO3153.6WKGHO3553.6WKGHO4003.6WKGHO450
7.2WFNHO257.2WFNHO31.57.2WFNHO407.2WFNHO507.2WFNHO637.2WFNHO807.2WFNHO1007.2WFNHO1257.2WFNHO160
7.2WKNHO2007.2WKNHO2247.2WKNHO2507.2WKNHO315
3.63.63.63.63.63.63.63.63.6
3.63.63.63.63.6
3.63.6
3.63.63.63.63.6
3.63.6
3.63.63.63.6
3.63.63.63.63.63.63.63.63.63.6
3.63.63.63.6
7.27.27.27.27.27.27.27.27.2
7.27.27.27.2
56.310162025
31.54050
506380100125
160200
506380100125
160200
250315355400
31.540506380
100125160200250
315355400450
2531.540506380
100125160
200224250315
505050505050505050
5050505050
5050
5050505050
5050
50505050
50505050505050505050
50505050
404040404040404040
40404040
132424565670112112140
180225288360450
600600
152171190190190
300300
520650820820
151151151151170212212300300500
8528529601150
8496107122133133262300337
500500960960
14856.356.333.122.117.710.17.546.03
5.363.682.882.161.73
1.280.938
6.615.033.522.872.44
1.531.24
0.6530.4350.3450.345
18.413.99.246.935.474.403.602.161.771.13
0.6460.5120.4540.379
38.725.518.213.310.47.304.922.942.05
1.631.441.110.779
588121215141721
2021273139
4752
2128313953
5467
57605976
25313238486279759596
8990100108
343540465665696372
9098105107
192192192192192192192192192
192192192192192
192192
254254254254254
254254
254254254254
359359359359359359359359359359
359359359359
403403403403403403403403403
403403403403
2.0X101
1.6X102
1.6X102
1.7X102
3.9X102
6.1X102
1.2X103
2.1X103
3.2X103
1.8X103
3.8X103
6.3X103
9.8X10
3
1.5X104
3.1X104
5.7X104
1.8X103
3.1X103
6.3X103
9.5X103
1.3X104
3.4X104
5.1X104
1.8X105
4.1X105
6.4X105
6.4X105
4.5X102
8.0X102
1.8X103
3.2X103
5.1X103
7.9X103
1.2X104
3.4X104
5.1X104
1.3X105
4.5X105
6.4X105
8.2X105
1.2X106
1.4X102
3.1X102
6.1X102
1.2X103
1.9X103
3.8X103
9.8X103
2.4X104
5.0X104
8.8X104
1.1X105
2.2X105
4.5X105
1.6X103
1.3X103
1.3X103
1.4X103
3.2X103
4.9X103
9.8X103
1.7X104
2.6X104
2.4X104
4.5X104
8.0X104
1.1X10
5
2.2X105
6.2X105
1.1X106
2.4X104
4.5X104
8.0X104
1.2X105
1.8X105
4.1X105
7.2X105
2.4X106
5.0X106
7.0X106
7.0X106
6.0X103
1.2X104
2.2X104
4.5X104
7.5X104
1.2X105
1.7X105
4.2X105
7.0X105
1.9X106
6.0X106
8.5X106
1.1X107
1.5X107
2.1X103
4.7X103
8.0X103
1.5X104
3.0X104
5.8X104
1.3X105
2.4X105
7.0X105
1.3X1061.6X106
1.6X106
3.1X106
353535353535353535
5151515151
7676
5151515151
7676
76767676
76767676767676767676
76767676
767676767676767676
76767676
0.540.540.540.540.540.540.540.540.54
1.11.11.11.11.1
2.12.1
1.461.461.461.461.46
3.23.2
3.23.23.23.2
4.14.14.14.14.14.14.14.14.14.1
3.93.93.93.9
4.44.44.44.44.44.44.44.44.4
4.44.44.44.4
Part Number
CurrentRating
Length Diameter
In
A
Un
kV
I1
kA mmm W
A2s
mm
WeightBreakingCapacity
I3
A
MinimumBreaking Current
Cold resistance and watts lossin free air at rated current
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
Selection Tables
Table of ratings for motor fuses 3.6 - 7.2kV to British Standard dimensions
For more information visit our website www.bussmann.com
7/29/2019 Bussmann High Voltage Fuses Catalogue
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20
Motor Fuse Links
Higher Current Ratings
Higher ratings than those tabulated above can be obtained by using fuse links connected in parallel. Special fixing arrangements forconnecting up to 3 fuse links in parallel, are available. Please contact Bussmann application engineers for more details. The codedesignations for these arrangements are given in How to Order (page 61), dimensional drawings are given on page 26.
Selection Tables
Table of ratings for motor fuses 3.6 - 7.2kV to DIN dimensions
3.6WDOSJ503.6WDOSJ633.6WDOSJ803.6WDOSJ1003.6WDOSJ125
3.6WFOSJ1603.6WFOSJ200
3.6WDLSJ503.6WDLSJ633.6WDLSJ803.6WDLSJ1003.6WDLSJ1253.6WFLSJ160
3.6WFLSJ200
3.6WKLSJ2503.6WKLSJ3153.6WKLSJ400
7.2WFMSJ257.2WFMSJ31.57.2WFMSJ407.2WFMSJ507.2WFMSJ637.2WFMSJ807.2WFMSJ1007.2WFMSJ1257.2WFMSJ160
7.2WKMSJ2007.2WKMSJ2247.2WKMSJ2507.2WKMSJ3157.2WKMSJ355
3.63.63.63.63.6
3.63.6
3.63.63.63.63.63.6
3.6
3.63.63.6
7.27.27.27.27.27.27.27.27.2
7.27.27.27.27.2
506380100125
160200
506380100125160
200
250315400
2531.540506380100125160
200224250315355
5050505050
5050
505050505050
50
505050
636363636363636363
6363636363
180225288360450
600600
152171190190190300
300
820820820
8496107122133133262300337
5005009609601000
5.363.682.882.161.73
1.280.938
7.735.94.123.382.851.74
1.42
0.7410.5070.401
33.925.417.814.811.68.125.333.192.23
1.791.591.230.8690.724
2021273139
4752
273237466161
80
676990
334056536172747079
99110107120125
192192192192192
192192
292292292292292292
292
292292292
442442442442442442442442442
442442442442442
1.8X103
3.8X103
6.3X103
9.8X103
1.5X104
3.1X104
5.7X104
1.8X103
3.1X103
6.3X103
9.5X103
1.3X104
3.4X104
5.1X104
1.9X105
4.0X105
6.4X105
1.4X102
3.1X102
6.1X102
1.2X103
1.9X103
3.8X103
9.8X103
2.4X104
5.0X104
8.8X104
1.1X105
2.2X105
4.5X105
6.4X105
2.4X104
4.5X104
8.0X104
1.1X105
2.2X105
6.2X105
1.1X106
2.4X104
4.5X104
8.0X104
1.2X105
1.8X105
4.1X105
7.2X105
2.4X106
5.0X106
7.0X106
2.1X103
4.7X103
8.0X103
1.5X104
3.0X104
5.8X104
1.3X105
2.4X105
7.0X105
1.3X106
1.6X106
1.6X106
3.1X106
3.9X106
5151515151
7676
515151515176
76
767676
767676767676767676
7676767676
1.11.11.11.11.1
2.12.1
1.631.631.631.631.633.16
3.16
3.163.163.16
5.25.25.25.25.25.25.25.25.2
5.25.25.25.25.2
Part Number
CurrentRating
Length Diameter
In
A
Un
kV
I1
kA mmm W
A2s
mm
WeightBreakingCapacity
I3
A
MinimumBreaking Current
Cold resistance and watts lossin free air at rated current
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
Table of ratings for motor fuses 2.75 - 5.5kV to USA dimensions
2.75VFRHA*R2.75VFRHA*R
2.75VFRHA*R
2.75VFRHA*R
2.75VKRHA*R2.75VKRHA*R
2.75VKRHK*R
2.75VKRHK*R
5.5VFNHA*R
5.5VFNHA*R5.5VFNHA*R
5.5VFNHA*R
5.5VKNHA*R5.5VKNHA*R
5.5VKNHK*R5.5VKNHK*R
2.752.75
2.75
2.75
2.752.75
2.75
2.75
5.5
5.55.5
5.5
5.55.5
5.55.5
2R3R
4R
6R
9R12R
18R
24R
2R
3R4R
6R
9R12R
18R24R
6060
60
60
6060
60
60
60
6060
60
6060
6060
180229
257
525
500500
500
500
180
229257
525
500500
500500
6.154.04
2.69
1.62
1.151.03
0.577
0.514
8.35
5.483.65
2.31
1.631.45
0.8150.725
5257
62
65
7080
140
156
70
7785
91
99110
198220
276276
276
276
276276
276
276
403
403403
403
403403
403403
8.1x103
1.9x104
4.2x104
3.9x104
8.8x104
1.1x105
3.5x105
4.5x105
8.1x103
1.9x104
4.2x104
3.9x104
8.8x1041.1x105
3.5x105
4.5x105
2.8x104
7.5x104
1.4x105
3.4x105
8.4x105
1.2x106
3.2x106
5.5x106
2.8x104
7.9x104
1.6x105
3.6x105
8.8x1051.3x106
3.4x106
5.8x106
7676
7676
76
76
76
76
7676
76
76
7676
76
76
2.52.5
2.52.5
2.5
2.5
5.2
5.2
3.83.8
3.8
3.8
3.83.8
7.8
7.8
Part Number
CurrentRating
Length Diameter
In
A
Un
kV
I1
kA mmm W
A2s
mm
WeightBreakingCapacity
I3
A
MinimumBreaking Current
Cold resistance and watts lossin free air at rated c urrent
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
For more information visit our website www.bussmann.com
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21
Motor Fuse Links
Time current characteristics for 3.6kV Motor Fuse Links, fuse types ADL, WDL, WFL and WKL
6.3A
10A
16A
20A
25A
31.5A
40A
50A
63A
80A
100A
125A
160A
200A
250A
315A
400A
5
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
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22
Motor Fuse Links
Time current characteristics for 3.6kV Motor Fuse Links, fuse types WDF, WFF and WKF
50A
63A
80A
100A
125A
160A
200A
250A
315A
400A
5
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
For more information visit our website www.bussmann.com
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23
Motor Fuse Links
Time current characteristics for 3.6kV Motor Fuse Links, fuse types WFG and WKG
For more information visit our website www.bussmann.com
31.5A
40A
50A
63A
80A
100A
125A
160A
200A
250A
315A
355A
400A
450A
5
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
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24
Motor Fuse Links
Time current characteristics for 7.2kV Motor Fuse Links, fuse types WFN, WKN, WFM and WKM (* only WKM)
25A
31.5A
40A
50A
63A
80A
100A
125A
160A
200A
224A
250A
315A
355A(WKM)*
5
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE
+10%ONCURRENT
RMSSYMMETICALPROSPECTIVECURRENTINA
MPERES
For more information visit our website www.bussmann.com
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25
Motor Fuse Links
Dimensions (mm)
FUSE LINK TYPE
WDOSJWDLSJWFOSJWFLSJWKLSJWFMSJWKMSJ
A
192292192292292442442
D
51517676767676
Fuse Link type: DIN
FUSE LINK TYPE
+WJON6WDO*H6WFO*H6
A
257261261
B
235235235
C
192192192
D
365176
E
9.510.510.5
F
131320
G
252564
H
232942
J
2.42.62.6
Fuse Link type: Tag Type 6 - BS 2692 Standard
+ Fuse type not available withstriker
26mm maximum travel after operation
Fuse type: WJO
min 10 to max 16mm travel after operation
Fuse type: WDO, WFO
Dimensions in mm
For more information visit our website www.bussmann.com
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Motor Fuse Links
Fuse Link type: Tag Type 0 - BS 2692 Standard
FUSE LINK TYPE
WDFHOWFFHOWKFHOWFGHOWKGHOWFNHOWKNHO
A
337337337442442486486
B
305305305410410454454
C
254254254359359403403
D
51767676767676
Triple barrel fuse link(3rd barrel shown dotted) with 03 tags.
Double barrel fuse link with 02 tagsshown in full lines.
Dimensions (mm)
min 10 to max 16mm travel after operation
min 10 to max 16mm travel after operation
For more information visit our website www.bussmann.com
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For more information visit our website www.bussmann.com27
Motor Fuse Links
Fuse Link type: USA Motor
FUSE LINK TYPE
VFRHAVKRHAVKRHKVFNHAVKNHAVKNHK
A
276276276403403403
76
A
80Max
10 Min - 16 Max striker travel after operation if fitted
76
K Tags (Double barrel fuse links)
76
A
85
160
10 Min - 16 Max striker travel after operation if fitted10 Min - 16 Max striker travel after operation if fitted
A Tags (ferrule)
K Tags (Double barrel fuse links)
FUSE LINK TYPE
VFRHAVKRHAVKRHKVFNHAVKNHAVKNHK
A
276276276403403403
Dimensions (mm)
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For more information visit our website www.bussmann.com27
Motor Fuse Links
Fuse Link type: USA Motor
FUSE LINK TYPE
VFRHAVKRHAVKRHKVFNHAVKNHAVKNHK
A
276276276403403403
76
A
80Max
10 Min - 16 Max striker travel after operation if fitted
76
K Tags (Double barrel fuse links)
76
A
85
160
10 Min - 16 Max striker travel after operation if fitted10 Min - 16 Max striker travel after operation if fitted
A Tags (ferrule)
K Tags (Double barrel fuse links)
FUSE LINK TYPE
VFRHAVKRHAVKRHKVFNHAVKNHAVKNHK
A
276276276403403403
Dimensions (mm)
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28
Voltage and Auxiliary Transformer Fuse Links
For more information visit our website www.bussmann.com
Bussmann manufacture a wide range of voltage transformer (VT) fuse links. In North America they are referred to asPotential Transformer fuses. These fuse links are designed for use in the primary side of voltage transformers toprovide system isolation in the event of faults occurring in the transformer circuit.
Voltage transformer fuse links, have a preferred current rating of 3.15A. Experience has shown that there is a risk ofspurious operation by transient overcurrents where lower current ratings are used. In addition, in order to minimise therisk of deterioration of the fine fuse elements caused by corona, it is desirable to mount the fuse links so that theearthed metal is not in the immediate vicinity of the part of the barrel between the ferrules.
Higher current and E ratings are available for special applications, including auxiliary transformers.
A range of VT fuse links with a breaking capacity of 200kA for use at the output terminals of large turbo alternatorscan also be ordered. For further information, please contact Bussmann application engineers.
Types prefixed A or N are suitable for use in Air only. Types prefixed O may be used under oil.
For DIN dimensioned voltage transformer and auxiliary transformer fuse links, please refer to DIN dimensionedfuse link section.
British Standard VT Fuse Links.
A range of voltage transformer primaryFuse Links to BS2692-1 and IEC60282-1.
Wide range of ratings from 1 kV to 36 kV.
3.15 Amp industry standard current ratings.
CAV range with ratings from 3.6kV to 38kV.
Bussmann Voltage and Auxiliary Transformer Fuse Links
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For more information visit our website www.bussmann.com29
Voltage and Auxiliary Transformer Fuse Links
The last letter of the ordering code on these items is normally either A or 22, please refer to how to orderpage 61 for an explanation.
1.1NBUN*21.1NBUN*3.151.1NBUN*6.3
3.6ABWN*3.153.6ABWN*6.3
3.6ABCN*3.153.6ABCN*6.33.6ABCN*10
5.5AMWNA0.5E5.5AMWNA1E5.5AMWNA2E5.5AMWNA3E5.5AMWNA4E5.5AMWNA5E
5.5ABWNA0.5E5.5ABWNA1E5.5ABWNA2E5.5ABWNA3E5.5ABWNA5E
7.2ABWN*3.157.2ABWN*6.3
7.2ABCN*3.157.2ABCN*6.3
7.2OBCN*3.157.2OBCN*6.3
7.2OBWN*3.157.2OBWN*6.3
12ABCN*3.1512OBCN*3.15
15.5ABFN*3.1515.5OBFN*3.15
17.5ABGN*3.1517.5OBGN*3.15
24ABGN*3.1524OBGN*3.15
36OBGN*3.15
1.11.11.1
3.63.6
3.63.63.6
5.55.55.55.55.55.5
5.55.55.55.55.5
7.27.2
7.27.2
7.27.2
7.27.2
1212
15.515.5
17.517.5
2424
36
23.156.3
3.156.3
3.156.310
0.512345
0.51235
3.156.3
3.156.3
3.156.3
3.156.3
3.153.15
3.153.15
3.153.15
3.153.15
3.15
505050
5050
505050
505050505050
5050505050
4545
4545
4545
4545
4545
3232
3535
2525
31.5
0.1450.1070.065
0.3580.120
0.3580.1200.080
32.516.00.5840.3200.1900.147
50.225.11.080.4690.199
0.6140.240
0.6140.240
0.6140.240
0.6140.240
1.211.21
1.241.24
1.451.45
2.002.00
2.05
868686
142142
195195195
142142142142142142
142142142142142
142142
195195
195195
142142
195195
254254
359359
359359
359
6.3X100
1.2X101
3.2X101
6.3X100
4.8X101
6.3X100
4.8X101
1.1X102
1.2X100
5.0X100
4.0X100
1.8X101
4.6X101
7.9X101
0.49X100
2.0X100
1.2X100
6.3X100
3.2X101
6.3X100
4.8X101
6.3X100
4.8X101
6.3X100
4.8X101
6.3X100
4.8X101
6.3X100
6.3X100
6.3X100
6.3X100
6.3X100
6.3X100
6.3X100
6.3X100
1.2X101
1.8X101
3.4X101
9.2X101
1.8X101
3.1X102
1.8X101
3.1X102
7.0X102
3.5X100
1.4X101
1.2X101
1.1X102
3.0X102
5.1X102
1.4X100
5.7X100
3.4X100
1.8X101
2.0X102
4.0X101
3.1X102
4.0X101
3.1X102
4.0X103.1X102
4.0X103.1X102
1.8X101
1.8X101
4.0X101
4.0X101
4.0X101
4.0X101
4.0X101
4.0X101
7.7X101
25.425.425.4
25.425.4
25.425.425.4
20.620.620.620.620.620.6
25.425.425.425.425.4
25.425.4
25.425.4
25.425.4
25.425.4
25.425.4
25.425.4
25.425.4
25.425.4
25.4
0.120.120.12
0.190.19
0.2450.2450.245
0.1140.1140.1140.1140.1140.114
0.190.190.190.190.19
0.190.19
0.2450.245
0.2450.245
0.190.19
0.2450.245
0.310.31
0.430.43
0.430.43
0.43
Part Number
CurrentRating
Length Diameter
In
A
Un
kV
I1
kA mm
A2s
mm
WeightBreakingCapacity
Cold Resistance JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
A 36kV AGBN* 3.15A is also available for certain indoor applications. Please contact Bussmanns application engineersfor further information.
Fuse Link type: TAG type A Ferrule and 22
FUSE LINK TYPE
NBUN*ABWNAAMWNAOBWN*ABCN*OBCN*ABFN*OBFN*ABGN*OBGN*
A
86142142142195195254254359359
B
17.5301630303030303030
D
25.425.420.525.425.425.425.425.425.425.4
Table of ratings for voltage transformer fuses 1.1 - 36kV
8mm bolt with BSW thread
Selection Table
*
Ferrule Fuse Link Tag type A shown in full linesand 22 Tag shown in dotted lines
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30
Voltage and Auxiliary Transformer Fuse Links
For more information visit our website www.bussmann.com
*Curvevalidforall3.15Aratingsshownintheselectiontable.
Curv
evalidforall6.3Aratingsshownin
theselectiontable.
Time current characteristics for 3.6 to 36kV VT Fuse Links of 3.15, 6.3 and 10 Amp ratings
1HO
UR
10A
6.3A
3.15A*
3 4
PRE - ARCING TIME IN SECONDS
CURVESR
ELATETOMEANPRE-ARCIN
GTIMEWITHTOLERANCE+
10%ONCURRENT
RMSSYMMETICALPR
OSPECTIVECURRENTINAMPERES
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For more information visit our website www.bussmann.com31
Voltage and Auxiliary Transformer Fuse Links
Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA (minimum melting times)
1
0.5E
1E
2E
3E
4E
5E
100
80
605040
30
20
10
8
54
3
2
1
.8
.6
.5
.4
.3
.2
.1
.08
.06
.05
.04
.03
.02
.012 3 4 5 6 8
10
200
300
400
500
0.5 2
030
40
50
60
80
100
TIMEINSEC
ONDS
RMS SYMMETRICAL CURRENT IN AMPS
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32
Voltage and Auxiliary Transformer Fuse Links
For more information visit our website www.bussmann.com
Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA (maximum melting times)
100
80
605040
30
20
10
8
54
3
2
1
.8
.6
.5
.4
.3
.2
.1
.08
.06
.05
.04
.03
.02
.012 3 4 5 6 8
10
200
300
400
500
0.5 2
030
40
50
60
80
100
TIMEINSE
CONDS
RMS SYMMETRICAL CURRENT IN AMPS
0.5E
1E
2E
3E
4E
5E
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For more information visit our website www.bussmann.com33
Voltage and Auxiliary Transformer Fuse Links
Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type AMWNA (minimum melting times)
100
80
605040
30
20
10
8
54
3
2
1
.8
.6
.5
.4
.3
.2
.1
.08
.06
.05
.04
.03
.02
.012 3 4 5 6 8
10
200
300
400
500
0.5 2
030
40
50
60
80
100
TIMEINSECONDS
RMS SYMMETRICAL CURRENT IN AMPS
0.5E
1E
2E
3E
5E
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34
Voltage and Auxiliary Transformer Fuse Links
For more information visit our website www.bussmann.com
Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type AMWNA (maximum melting times)
100
80
605040
30
20
10
8
54
3
2
1
.8
.6
.5
.4
.3
.2
.1
.08
.06
.05
.04
.03
.02
.012 3 4 5 6 8
10
200
300
400
500
0.5 2
030
40
50
60
80
100
TIMEINSE
CONDS
RMS SYMMETRICAL CURRENT IN AMPS
0.5E
1E
2E
3E
5E
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For more information visit our website www.bussmann.com35
Voltage and Auxiliary Transformer Fuse Links
These Voltage Transformer fuse links are available in the ratings shown in the table above. CAV fuse links are suitable forindoor use in air only. Type CAVH Fuse links are fitted with striker pins which may be used for indication purposes.
Selection Table
Fuse Link type: CAV (Shown with striker fitted)
FUSE LINK TYPE
3.6CAV5.5CAV5.5CAVH7.2CAV12CAV15.5CAV15.5CAVH17.5CAV24CAV36CAV38CAV
38CAVH
A
220
187
220220
327
220340440
440 max 20mm travel after operation
Table of ratings for voltage transformer fuses, 3.6 - 38kV type CAV
mm
3.6CAV2
5.5 CAV15E
5.5CAVH0.5E5.5CAVH1E5.5CAVH2E
7.2CAV27.2CAV47.2CAV67.2CAV10
12CAV2
15.5CAV0.5E15.5CAV1E
15.5CAV2E15.5CAV3E15.5CAV5E15.5CAV7E
15.5CAVH0.5E15.5CAVH1E15.5CAVH2E
17.5CAV217.5CAV417.5CAV617.5CAV10
24CAV224CAV324CAV4
36CAV236CAV4
38CAV4E
38CAVH0.5E
38CAVH1E38CAVH2E
3.6
5.5
5.55.55.5
7.27.27.27.2
12
15.515.5
15.515.515.515.5
15.515.515.5
17.517.517.517.5
242424
3636
38
38
3838
2
15
0.512
24610
2
0.51
2357
0.512
24610
234
24
4
0.5
12
50
50
505050
40404040
40
8080
80808080
808080
40404040
404040
4040
40
40
4040
0.492
0.488
12.112.10.388
0.8930.5030.3210.215
1.34
15175.4
32.316.20.6590.375
30.130.10.947
1.690.6110.3620.239
2.541.430.916
3.121.12
2.42
66.6
66.62.20
220
187
187187187
220220220220
220
327327
327327327327
327327327
220220220220
340340340
440440
440
440
440440
6.2X100
5.5X102
1.4X101
1.4X101
1.8X101
6.2X100
2.0X101
4.8X101
1.1X102
6.2X100
0.5X100
2.0X100
1.2X10
0
4.8X100
2.0X101
7.1X101
1.4X101
1.4X101
1.8X101
6.3X100
4.8X101
1.4X102
3.2X102
6.2X100
2.0X101
4.8X101
6.2X100
4.8X101
1.2X101
1.4X101
1.4X101
1.8X101
1.8X101
3.5X103
9.0X101
9.0X101
1.1X102
1.8X101
5.7X101
1.4X102
3.2X102
1.8X101
1.5X100
5.8X100
3.5X10
0
1.4X101
1.3X102
4.5X102
9.0X101
9.0X101
1.1X102
1.8X101
1.4X102
4.0X102
9.2X102
1.8X101
5.7X101
1.4X102
1.8X101
1.4X102
3.4X101
9.0X101
9.0X101
1.1X102
41.3
41.3
41.341.341.3
41.341.341.341.3
41.3
41.341.3
41.341.341.341.3
41.341.341.3
41.341.341.341.3
41.341.341.3
41.341.3
41.3
41.3
41.341.3
0.7
0.6
0.60.60.6
0.70.70.70.7
0.7
0.90.9
0.90.90.90.9
0.90.90.9
0.70.70.70.7
1.01.01.0
1.21.2
1.2
1.2
1.21.2
kg
Part Number
CurrentRating
Length Diameter
In
A
Un
kV
I1
kA mm
A2s
mm
WeightBreakingCapacity
Cold resistance in freeair at rated current
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
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Current Limiting Fuse Links for use in Oil Switchgear
For more information visit our website www.bussmann.com
Fuse Links comply with IEC 282-1, BS2692-1and ESI Standard 12-8.
7.2 and 12kV Fuse Links tested at highestsystem voltage and approved by the UKElectricity Association approvals panel.
Voltage ranges 3.6 to 24kV.
Fitted with powerful pyrotechnic striker pin.
Bussmann under oil Fuse Links
The Bussmann range of oil tight fuse links are designed for use in oil filled switchgear. This type was pioneered inthe U.K. and the Bussmann range has been in continuous manufacture for almost 40 years, being by far the mostwidely used device of its kind in the world. Over 1,000,000 Bussmann branded fuse links have been put into servicewithout a single reported case of oil ingress. A unique triple seal system ensures against long term sealdeterioration. Low power dissipation ensures cool running in oil filled switchgear.
The range is not suitable for use inside oil filled transformer tanks where high oil temperatures may be expected.
Current Limiting Fuse Links for use in Oil Switchgear
Dimensions (mm)
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For more information visit our website www.bussmann.com37
Current Limiting Fuse Links for use in Oil Switchgear
Selection Table
Part Number
CurrentRating
Length Diameter
In
A
Un
kV
I1
kA mmm
A2s
mm
WeightBreakingCapacity
Cold resistance in freeair at rated current
Dimensional Reference
BS 2692
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
3.6OEFMA6.33.6OEFMA10
3.6OEFMA16
3.6OEFMA203.6OEFMA25
3.6OEFMA31.53.6OEFMA40
3.6OEFMA503.6OEFMA63
3.6OEFMA80
3.6OEFMA1003.6OEFMA125
3.6OEFMA1603.6OEFMA200
3.6OEGMA63
3.6OEGMA80
3.6OEGMA100
3.6OEGMA1253.6OEGMA1603.6OEGMA200
3.6OLGMA250
7.2OEFMA807.2OEFMA100
7.2OEFMA112
7.2OHGMA100
7.2OHGMA1257.2OHGMA140
7.2OHGMA160
12OEFMA6.3
12OEFMA1012OEFMA16
12OEFMA2012OEFMA25
12OEFMA31.5
12OEFMA4012OEFMA50
12OEFMA63
12OHFMA7112OHFMA80
12OHGMA6.312OHGMA10
12OHGMA1612OHGMA20
12OHGMA25
12OHGMA31.512OHGMA40
12OHGMA5012OHGMA63
12OHGMA7112OHGMA80
12OHGMA90
12OHGMA100
12OLGMA125
15.5OEFMA6.3
15.5OEFMA1015.5OEFMA16
15.5OEFMA20
15.5OEFMA2515.5OEFMA31.515.5OEFMA40
15.5OEFMA50
15.5OEFMA63
15.5OHGMA7115.5OHGMA80
15.5OHGMA90
15.5OLGMA100
17.5OHGMA6.3
17.5OHGMA10
17.5OHGMA161 7.5OHGMA20
17.5OHGMA2517.5OHGMA31.5
17.5OHGMA4017.5OHGMA50
17.5OHGMA63
17.5OHGMA80
24OEGMA6.3
24OEGMA1024OEGMA1624OEGMA20
24OEGMA25
24OEGMA31.524OEGMA40
24OEGMA50
3.63.6
3.6
3.63.6
3.63.6
3.63.6
3.6
3.63.6
3.63.6
3.63.6
3.6
3.63.63.6
3.6
7.27.2
7.2
7.2
7.27.2
7.2
12
1212
1212
12
1212
12
1212
1212
1212
12
1212
1212
1212
12
12
12
15.5
15.515.5
15.5
15.515.515.5
15.5
15.5
15.515.5
15.5
15.5
17.5
17.5
17.517.5
17.517.5
17.517.5
17.5
17.5
24
2424
2424
2424
24
6.310
16
2025
31.540
5063
80
100125
160200
6380
100
125160200
250
80100
112
100
125140
160
6.3
1016
2025
31.5
4050
63
7180
6.310
1620
25
31.540
5063
7180
90
100
125
6.3
1016
20
2531.540
50
63
7180
90
100
6.3
10
1620
2531.5
4050
63
80
6.3
1016
2025
31.540
50
5050
50
5050
5050
5050
50
5050
5050
5050
50
505050
50
4545
45
45
4545
45
40
4040
4040
40
4040
40
4545
4040
4040
40
4040
4040
4040
40
40
40
40
4040
40
4040
4040
40
4040
40
40
35
35
3535
3535
3535
35
35
25
2525
2525
2525
25
20783.6
42.5
33.926.5
17.615.4
11.57.60
6.03
4.023.02
2.211.74
11.08.70
5.50
4.593.442.29
1.72
8.365.59
4.57
6.09
5.084.35
3.81
520
214108
77.057.8
38.5
28.220.1
15.1
12.310.9
520214
10877.0
57.8
38.528.2
22.617.0
16.6
13.412.2
8.75
7.09
392
188101
78.7
55.336.9
29.522.1
17.8
17.715.5
11.6
10.0
665
282
139100
74.749.8
36.526.0
19.5
15.5
605
290153
11984.5
55.944.7
34.0
F01
F02
F02
F01
F02
F01
F01
F02
F02
F01
F02
F02
F02
F02
254
254254
254
254254
254254
254254
254
254254
254
254
254254
254254
254
254
254
254254
359
359359
359
254
254254
254254
254
254254
254
254254
359
359359
359359
359359
359
359359
359359
359
359
254
254254
254
254254
254254
254
359
359359
359
359
359359
359359
359
359359
359359
359
359359
359
359359
359359
63.5
63.563.5
63.5
63.563.5
63.563.5
63.563.5
63.5
63.563.5
63.5
63.5
63.563.5
63.563.5
63.5
63.5
63.563.5
63.5
63.5
63.563.5
63.563.563.5
63.5
63.563.5
63.563.5
63.563.5
63.563.5
63.5
63.563.5
63.563.5
63.5
63.563.5
63.563.5
63.563.5
63.5
63.5
63.5
63.5
63.563.5
63.563.5
63.5
63.563.5
63.5
63.563.5
63.5
63.563.5
63.5
63.563.5
63.563.5
63.563.5
63.5
63.5
63.563.5
63.5
63.563.5
63.563.5
1.9
1.91.9
1.9
1.91.9
1.91.9
1.91.9
1.9
1.91.9
1.9
2.6
2.62.6
2.62.6
2.6
2.6
1.91.9
1.9
2.62.6
2.62.6
1.9
1.91.9
1.91.9
1.91.9
1.9
1.9
1.91.9
2.6
2.62.6
2.62.6
2.62.6
2.6
2.62.6
2.62.6
2.6
2.6
1.9
1.9
1.91.9
1.91.9
1.9
1.91.9
2.6
2.62.6
2.6
2.62.6
2.6
2.62.6
2.62.6
2.62.6
2.6
2.6
2.62.62.6
2.62.62.62.6
2.0X101
1.4X102
1.7X102
2.7X102
4.5X102
1.0X103
8.9X103
1.6X103
3.3X103
5.2X103
1.2X104
2.1X104
1.5X104
2.4X104
3.2X103
5.2X103
5.0X103
7.2X103
1.3X104
2.9X104
5.1X104
3.2X103
6.3X103
9.1X103
5.0X103
7.2X103
9.8X103
1.3X104
2.0X101
1.4X102
1.7X102
3.4X102
4.0X102
8.9X102
1.5X103
2.9X103
5.1X103
3.2X103
4.1X103
2.0X101
1.4X102
1.7X102
3.4X102
4.0X102
8.9X102
1.5X103
2.3X103
4.1X103
2.0X103
3.2X103
3.8X103
6.3X103
1.0X104
4.8X101
4.0X101
2.7X101
4.5X101
5.2X101
1.2X103
1.8X103
3.3X103
2.0X103
2.5X103
3.2X103
5.0X103
7.2X103
2.0X101
1.4X102
1.7X102
3.4X102
4.0X102
9.0X102
1.5X103
2.9X103
5.2X103
3.8X103
4.8X101
2.5X102
2.7X102
4.4X102
5.2X102
1.2X103
1.8X103
1.2X103
4.9X102
1.4X103
2.4X103
3.6X103
4.8X103
8.8X103
1.0X104
1.4X104
2.4X104
3.4X104
6.2X104
9.6X104
1.6X105
2.3X105
1.9X104
2.7X104
4.9X104
6.4X104
1.0X105
1.8X105
2.7X105
5.8X104
9.0X104
1.3X105
7.5X104
9.6X104
1.4X105
1.8X105
6.1X102
1.8X103
3.0X103
5.0X103
6.5X103
1.2X104
1.8X104
2.8X104
4.3X104
5.4X104
7.0X104
6.1X102
1.8X103
3.0X103
5.0X103
6.5X103
1.2X104
1.8X104
2.4X104
3.7X104
3.9X104
5.5X104
6.2X104
8.9X104
1.7X105
1.0X103
3.4X103
3.4X103
4.9X103
1.1X104
1.5X104
2.0X104
3.0X104
3.9X104
4.4X104
5.4X104
7.5X104
9.6X104
6.1X102
1.8X103
3.0X103
5.0X103
6.5X103
1.2X104
1.9X104
2.9X104
4.5X104
5.7X104
1.0X103
3.4X103
3.4X103
4.9X103
1.1X104
1.5X104
2.0X104
2.4X104
Table of ratings for British Standard Oil tight fuses 3.6 - 24kV
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Current Limiting Fuse Links for use in Oil Switchgear
Selection of these fuse links has been based on a compromise between the following:
1 Withstand against magnetising inrush current is taken as 12 times full-load current for 0.1 second.
2 Withstand against 150% permissible overload current. Recommendations marked with an asterisk or dagger havethe following significance:
* Limited to permissible overload of 130% Permits use of a 12kV OHFMA 80A fuse with a 1000 kVA transformer where permissible overload does notexceed 130%.
3 For 6.6kV systems, 12kV fuse links are recommended where possible in the interests of standardisation.
4 Wherever possible, 254mm long fuse links are offered rather than equivalent 359mm types.
5 The above recommendations are not generally applicable to transformers feeding motor circuits with startingcurrents in excess of the transformer full load current. In this event, please consult Bussmann application engineers.
General guide to the selection of Oil tight Fuse Links for use in the primary circuit of three phase transformers
200
250
300/315
400
500
630
750/800
1000
1250
1600
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OLGMA
OLGMA
-
-
63
80
100
125
160
200
250
250*
-
-
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
-
-
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OHGMA
OHGMA
OHGMA
-
31.5
40
50
63
71
100
125
140
160*
-
12
12
12
12
12
7.2
7.2
7.2
7.2
-
01
-
02
-
03
-
04
05
-
-
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OHFMA
OGFMA
OGFMA
OLGMA
25
25
31.5
40
50
63
80
90
100
125*
12
12
12
12
12
12
12
12
12
12
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OEFMA
OHGMA
OHGMA
OLGMA
16
20
25
31.5
40
50
63
71
90
100*
15.5
15.5
15.5
15.5
15.5
15.5
15.5
15.5
15.5
15.5
TransformerkVA Product
CodeRating kV
3.3kV
Transformer Priority Voltage
Current
Rating (A)
Product
Code
Rating kV
6.6kV
Current
Rating (A)
Product
Code
ESI 12-8
Ref.
Rating kV
11kV
Current
Rating (A)
Product
Code
Rating kV
13.8kV
Current
Rating (A)
For more information visit our website www.bussmann.com
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Current Limiting Fuse Links for use in Oil Switchgear
Time current characteristics for 7.2kV Oil Fuse Links, fuse type OEF
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVESRELATETOMEANPRE-ARCING
TIMEWITHTOLERANCE+10%ONCURRENT
RMSSYMMETICALPROS
PECTIVECURRENTINAMPERES
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Current Limiting Fuse Links for use in Oil Switchgear
Time current characteristics for 7.2kV Oil Fuse Links, fuse type OHG
PRE - ARCING TIME IN SECONDS
CURVES
RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE+10%ONCURRENT
RMSSYMMETICALPROSP
ECTIVECURRENTINAMPERES
For more information visit our website www.bussmann.com
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Current Limiting Fuse Links for use in Oil Switchgear
Time current characteristics for 12kV Oil Fuse Links, fuse types OEF and OHF
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVESRELATETOMEANPRE-ARCIN
GTIMEWITHTOLERANCE+
10%ONCURRENT
RMSSYMMETICALPROSP
ECTIVECURRENTINAMP
ERES
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Current Limiting Fuse Links for use in Oil Switchgear
Time current characteristics for 12kV Oil Fuse Links, fuse types OHG and OLG
PRE - ARCING TIME IN SECONDS
CURVESRELATETOMEANPRE-ARCING
TIMEWITHTOLERANCE+10%ONCURRENT
RM
SSYMMETICALPROSPECTIVECURRENTINAMPER
ES
For more information visit our website www.bussmann.com
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Current Limiting Fuse Links for use in Oil Switchgear
Time current characteristics for 15.5kV Oil Fuse Links, fuse types OEF, OHG and OLG
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVESRELATETOMEANPRE-ARCING
TIMEWITHTOLERANCE+10%ONCURRENT
RMSSYMMETICALPROS
PECTIVECURRENTINAMPERES
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Current Limiting Fuse Links for use in Oil Switchgear
Time current characteristics for 17.5kV Oil Fuse Links, fuse type OHG
PRE - ARCING TIME IN SECONDS
CURVESRELATETOMEANPRE-ARCING
TIMEWITHTOLERANCE+10%ONCURRENT
RMSSYMMETICALPROS
PECTIVECURRENTINAMPERES
For more information visit our website www.bussmann.com
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Current Limiting Fuse Links for use in Oil Switchgear
Time current characteristics for 24kV Oil Fuse Links, fuse type OEG
For more information visit our website www.bussmann.com
PRE - ARCING TIME IN SECONDS
CURVESRE
LATETOMEANPRE-ARCING
TIMEWITHTOLERANCE+1
0%ONCURRENT
RM
SSYMMETICALPROSPECTIVECURRENTINAMPER
ES
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Current Limiting Fuse Links for use in Air
For more information visit our website www.bussmann.com
High Voltage fuse links for use in Air,comply with BS 2962-1 dimensions.
Available in voltage ranges 3.6 to 72.5kV.
Full range performance option available at12kV and 24kV.
Wide variety of fixing arrangements available.
Powerful pyrotechnic striker fitted.
E-rated North American dimension products
also available.
Suitable for indoor or outdoor use.
British Standard Range
Bussmann Fuse Links for use in air
The Bussmann range of fuse links for use in air are available in Brit ish Standard form, BS 2692, Part 1 1975. A numberof options are available, including full range capability, and alternative fixing arrangements such as different types oftag, studs and collars etc. Details are available on application. Higher current ratings can be obtained by using fuse linksin parallel and special fixing arrangements are available for this purpose.
Bussmann Air Range - USA Dimensions
A comprehensive range of 'E' rated North American Dimension fuse links for industrial applications is also available.These are the latest technology full range fuse links in USA Industrial Standard 2 inch and 3 inch diameter ferrule style.Extended ratings in double barrel assemblies; striker, indicator and tag versions are also available.
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Current Limiting Fuse links for use in Air
For more information visit our website www.bussmann.com
Selection Tables
Part Number *
CurrentRating
Length Diameter
In
A
Un
kV
I1
kA mmm
A2s
mm
WeightBreakingCapacity
Cold resistance in freeair at rated current
JouleIntergral
(I2t)
VoltageRating
MaximumTotal Clearing
MinimumPre-Arcing kg
3.6ADFH*6.3
3.6ADFH*10
3.6ADFH*163.6ADFH*20
3.6ADFH*253.6ADFH*31.5
3.6ADFH*40
3.6ADGH*6.33.6ADGH*10
3.6ADGH*163.6ADGH*20
3.6ADGH*25
3.6ADGH*31.53.6ADGH*40
3.6ADGH*503.6ADGH*63
3.6ADGH*803.6ADGH*100
7.2ADFH*6.3
7.2ADFH*107.2ADFH*16
7.2ADFH*20
7.2ADFH*257.2ADFH*31.5
7.2ADFH*407.2ADFH*50
7.2ADFH*63
7.2AFFH*807.2AFFH*100
7.2BDGH