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24FFMSJ31.5

P1-P3P4-P6P7-P9P10-P12P13-P14
12
DIN - Fuse Links
Time current characteristics for 24kV DIN Fuse Links, ‘F’ range, fuse types FDM and FFM
1 HOUR
45A
40A
31.5A
25A
20A
16A
10A
6.3A
5
4
3
PRE - ARCING TIME IN SECONDS
CURVES RELATE TO MEAN PRE-ARCING TIME WITH TOLERANCE +
10% ON CURRENT
RMS SYMMETICAL PROSPECTIVE CURRENT IN AMPERES
For more information visit our website www.bussmann.com
13
DIN - Fuse Links
Dimensions (mm)
Please refer to the ‘how to order’ page 61
of this catalogue for further details of how ordering
codes are formatted
Force (N)
Force (N)
60
50
0
0
20
0
0
5
10
15 20
25
30
Travel (mm)
Travel (mm)
PRODUCT CODE
ADOSJ
SDOSJ
ADLSJ
FDLSJ
SDLSJ
FDMSJ
SDMSJ
SDQSJ
SFOSJ
AILSJ
FFLSJ
SFLSJ
SKLSJ
AIMSJ
FFMSJ
SFMSJ
SKMSJ
SFQSJ
SXLSJ
SXMSJ
SXQSJ
FXLSJ
A
192
192
292
292
292
442
442
537
192
292
292
292
292
442
442
442
442
537
292
442
537
292
D
51
51
51
51
51
51
51
51
76
76
76
76
76
76
76
76
76
76
88
88
88
88
60
70
80
90
50
40
30
20
10
0
5
10
15 20
25
30
26mm maximum travel after operation
Striker characteristics
E = Spring Striker 80N to IEC 60282-1
designation ‘medium’
S = Spring Striker 50N to DIN 43625
and IEC 60282-1 designation ‘medium’
For more information visit our website www.bussmann.com
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 the
High Voltage Fuse Link
Rated Current of the
High Voltage Fuse Link
Rated Current of the
High Voltage Fuse Link
50
100
125
160
200
250
315
400
500
630
800
1000
80
125
160
200
250
315
400
500
630
800
1000
1250
10
16
20
25
31.5
40
50
63
80
100
125
125
10
16
25
31.5
31.5
50
63
80
80
100
125
125
6.3
10
10
16
16
20
25
31.5
40
50
50
63
6.3
16
16
16
20
25
31.5
40
50
50
50
71
3.15
6.3
6.3
10
16
16
16
20
25
31.5
40
50
3.15
10
10
10
16
16
20
25
31.5
40
40
50
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 inrush
currents, taken as 12 times full load current for 0.1 seconds.
2. The fuse link should discriminate with the rating of secondary
fuse link stated or where only individual cable exit protection
exists, the highest rating likely to be used.
3. The fuse link should operate within 2 seconds for transformers
complying with IEC60076 - 5 in respect of impedance, voltage
and short circuit withstand current.
4. The fuse link should operate reasonably quickly in the event of a
transformer internal fault, or an earth fault in the secondary
terminal zone of the transformer.
5. In the case where there is no secondary fuse link for overload
protection, the minimum recommended HV fuse link rating
applies to the use of fuse links in encapsulated enclosures where
permissible continuous overload is generally limited to 20% of
transformer full load current. However if greater overload currents
are permissible a higher rating of fuse link may be required.
Where the fuse link is used in open air or conditions of unrestricted
ventilation a higher permissible overload may be possible.
6. In most cases more than one rating of HV fuse link is recommended
for a particular transformer size. Choice of fuse link will then
depend on which fuse offers the best protection e.g. having one fuse
for 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 guide
using 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
Tranformer
Rating
(kVA)
10
(kV)
20
(kV)
30
(kV)
Rated Current of the
High Voltage Fuse Link
Rated Current of the
High Voltage Fuse Link
Rated Current of the
High Voltage Fuse Link
50
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
6.3
16
16
16
20
25
31.5
40
50
63
80
100
125
160
200
10
16
25
31.5
31.5
50
63
80
80
100
125
125
200
200
200
6.3
6.3
10
10
16
16
20
20
25
31.5
40
50
63
71
100
6.3
16
16
16
20
25
31.5
40
50
50
50
71
100
100
160
3.15
6.3
6.3
6.3
10
10
16
16
16
20
25
31.5
40
50
63
3.15
10
10
10
16
16
16
25
31.5
40
40
50
50
63
63
For HV DIN Fuse Links type SXLSJ, SDLSJ, SFLSJ, SKLSJ, SDMSJ, SFMSJ, SXMSJ SDQSJ, SFQSJ. Selection guide
using 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 for Back-up Fuse LinksSelection Table for Back-up Fuse Links
P1-P3P4-P6P7-P9P10-P12P13-P14

24FFMSJ31.5

Mfr. #:
Buy 24FFMSJ31.5
Manufacturer:
Description:
Specialty Fuses 24KV 31.5A F/R DIN 1085
Lifecycle:
New from this manufacturer.
Delivery:
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