15.5OBFNA3.15

15.5OBFNA3.15 Datasheet

15.5ABFN*3.15.5OBFN*3.15

Part	Datasheet
15.5OBFNA3.15	15.5OBFNA3.15 (pdf)

Related Parts	Information
15.5OBFN223.15	15.5OBFN223.15

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Voltage and Auxiliary Transformer Fuse Links British Standard VT Fuse Links. A range of voltage transformer primary Fuse Links to BS2692-1 and IEC60282-1. Wide range of ratings from 1 kV to 36 kV. Amp industry standard current ratings. CAV range with ratings from 3.6kV to 38kV. Bussmann Voltage and Auxiliary Transformer Fuse Links Bussmann manufacture a wide range of voltage transformer VT fuse links. In North America they are referred to as Potential Transformer fuses. These fuse links are designed for use in the primary side of voltage transformers to provide 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 of spurious operation by transient overcurrents where lower current ratings are used. In addition, in order to minimise the risk of deterioration of the fine fuse elements caused by corona, it is desirable to mount the fuse links so that the earthed 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 alternators can 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 dimensioned fuse link section. For more information visit our website Voltage and Auxiliary Transformer Fuse Links Selection Table of ratings for voltage transformer fuses - 36kV 1.1NBUN2 1.1NBUN3.15 1.1NBUN6.3 3.6ABWN3.15 3.6ABWN6.3 3.6ABCN3.15 3.6ABCN6.3.6ABCN10 5.5AMWNA0.5E 5.5AMWNA1E 5.5AMWNA2E 5.5AMWNA3E 5.5AMWNA4E 5.5AMWNA5E 5.5ABWNA0.5E 5.5ABWNA1E 5.5ABWNA2E 5.5ABWNA3E 5.5ABWNA5E 7.2ABWN3.15 7.2ABWN6.3 7.2ABCN3.15 7.2ABCN6.3 7.2OBCN3.15 7.2OBCN6.3 7.2OBWN3.15 7.2OBWN6.3 12ABCN3.15 12OBCN3.15 15.5ABFN3.15.5OBFN3.15 17.5ABGN3.15 17.5OBGN3.15 24ABGN3.15 24OBGN3.15 36OBGN3.15 Voltage Rating Current Rating 1 2 3 4 5 1 2 3 5 Breaking Capacity I1 kA Cold Resistance Joule Intergral Minimum Maximum Pre-Arcing Total Clearing Length mm 6.3X100 1.8X101 1.2X101 3.4X101 3.2X101 9.2X101 6.3X100 1.8X101 4.8X101 3.1X102 The last letter of the ordering code on these items is normally either ‘A’ or ‘22’, please refer to ‘how to order’ page 61 for an explanation. Fuse Link type TAG type “A” Ferrule and “22” FUSE LINK TYPE NBUN* ABWNA AMWNA OBWN* ABCN* OBCN* ABFN* OBFN* ABGN* OBGN* 8mm bolt with BSW thread Ferrule Fuse Link Tag type “A” shown in full lines and “22” Tag shown in dotted lines For more information visit our website For more information visit our website Voltage and Auxiliary Transformer Fuse Links Time current characteristics for to 36kV VT Fuse Links of and 10 Amp ratings PRE - ARCING TIME IN SECONDS * Curve valid for all 3.15A ratings shown in the selection table. † Curve valid for all 6.3A ratings shown in the selection table. 1 HOUR CURVES RELATE TO MEAN PRE-ARCING TIME WITH TOLERANCE + 10% ON CURRENT 10A 6.3A 3.15A* RMS SYMMETICAL PROSPECTIVE CURRENT IN AMPERES Voltage and Auxiliary Transformer Fuse Links Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA minimum melting times TIME IN SECONDS 100 80 60 50 40 0.5E RMS SYMMETRICAL CURRENT IN AMPS For more information visit our website 1 2 3 4 5 6 8 10 20 30 40 50 60 80 100 200 300 400 500 Voltage and Auxiliary Transformer Fuse Links Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA maximum melting times TIME IN SECONDS 100 80 60 50 40 0.5E RMS SYMMETRICAL CURRENT IN AMPS 2 3 4 5 6 8 10 20 30 40 50 60 80 100 200 300 400 500 For more information visit our website Voltage and Auxiliary Transformer Fuse Links Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type AMWNA minimum melting times TIME IN SECONDS 100 80 60 50 40

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Voltage and Auxiliary Transformer Fuse Links

British Standard VT Fuse Links. A range of voltage transformer primary Fuse Links to BS2692-1 and IEC60282-1. Wide range of ratings from 1 kV to 36 kV. Amp industry standard current ratings. CAV range with ratings from 3.6kV to 38kV.

Bussmann Voltage and Auxiliary Transformer Fuse Links

Bussmann manufacture a wide range of voltage transformer VT fuse links. In North America they are referred to as Potential Transformer fuses. These fuse links are designed for use in the primary side of voltage transformers to provide 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 of spurious operation by transient overcurrents where lower current ratings are used. In addition, in order to minimise the risk of deterioration of the fine fuse elements caused by corona, it is desirable to mount the fuse links so that the earthed 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 alternators can 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 dimensioned fuse link section.

For more information visit our website

Voltage and Auxiliary Transformer Fuse Links

Selection Table of ratings for voltage transformer fuses - 36kV
1.1NBUN*2 1.1NBUN*3.15 1.1NBUN*6.3
3.6ABWN*3.15 3.6ABWN*6.3
3.6ABCN*3.15 3.6ABCN*6.3.6ABCN*10
5.5AMWNA0.5E 5.5AMWNA1E 5.5AMWNA2E 5.5AMWNA3E 5.5AMWNA4E 5.5AMWNA5E
5.5ABWNA0.5E 5.5ABWNA1E 5.5ABWNA2E 5.5ABWNA3E 5.5ABWNA5E
7.2ABWN*3.15 7.2ABWN*6.3
7.2ABCN*3.15 7.2ABCN*6.3
7.2OBCN*3.15 7.2OBCN*6.3
7.2OBWN*3.15 7.2OBWN*6.3
12ABCN*3.15 12OBCN*3.15
15.5ABFN*3.15.5OBFN*3.15
17.5ABGN*3.15 17.5OBGN*3.15
24ABGN*3.15 24OBGN*3.15
36OBGN*3.15

Voltage Rating

Current Rating
1 2 3 4 5
1 2 3 5

Breaking Capacity

I1 kA

Cold Resistance

Joule Intergral

Minimum Maximum Pre-Arcing Total Clearing

Length mm
6.3X100 1.8X101
1.2X101 3.4X101
3.2X101 9.2X101
6.3X100 1.8X101
4.8X101 3.1X102
* The last letter of the ordering code on these items is normally either ‘A’ or ‘22’, please refer to ‘how to order’ page 61 for an explanation.

Fuse Link type TAG type “A” Ferrule and “22”

FUSE LINK TYPE

NBUN* ABWNA AMWNA OBWN* ABCN* OBCN* ABFN* OBFN* ABGN* OBGN*
8mm bolt with BSW thread

Ferrule Fuse Link Tag type “A” shown in full lines and “22” Tag shown in dotted lines

For more information visit our website

For more information visit our website

Voltage and Auxiliary Transformer Fuse Links

Time current characteristics for to 36kV VT Fuse Links of and 10 Amp ratings

PRE - ARCING TIME IN SECONDS
* Curve valid for all 3.15A ratings shown in the selection table. † Curve valid for all 6.3A ratings shown in the selection table.
1 HOUR

CURVES RELATE TO MEAN PRE-ARCING TIME WITH TOLERANCE + 10% ON CURRENT
10A 6.3A 3.15A*

RMS SYMMETICAL PROSPECTIVE CURRENT IN AMPERES

Voltage and Auxiliary Transformer Fuse Links

Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA minimum melting times

TIME IN SECONDS
100 80
60 50 40
0.5E

RMS SYMMETRICAL CURRENT IN AMPS

For more information visit our website
1 2 3 4 5 6 8
10 20 30 40 50 60 80 100 200 300 400 500

Voltage and Auxiliary Transformer Fuse Links

Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA maximum melting times

TIME IN SECONDS
100 80
60 50 40
0.5E

RMS SYMMETRICAL CURRENT IN AMPS
2 3 4 5 6 8
10 20 30 40 50 60 80 100 200 300 400 500

For more information visit our website

Voltage and Auxiliary Transformer Fuse Links

Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type AMWNA minimum melting times

TIME IN SECONDS
100 80
60 50 40

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Datasheet ID: 15.5OBFNA3.15 506392