british standard fuse links - pro fuse international british standard fuses house service and...

Date of the presentation

British Standard Fuse LinksModule 3

Module 3 - page 2

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British Standard Fuses

BS Standard covers;- Dimensions

- Watts Loss

- Time-Current Characteristics

- Breaking Capacity (80KA)

- Three types BS88 industrial, BS1361Domestic and BS1362 Plug fuse

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BS88 Industrial Fuses Types

BS88 Covers many fuse requirementsIncluding,General requirementsIndustrial fusesSemiconductor fuses (covered in nextsession)

Electricity supply network fuses (FeederPillar fuses)

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BS88 Industrial Fuses

The main product range in the UK is BS88fuses.

Established by GEC in 1940

Old but well established range

Reliable circuit protection

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Cylindrical Ceramic Bodies

Press fit end caps

Granular high grade Sand filled

M-effect element

BS88 Industrial Fuses

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BS88 Voltage Range

Three major voltage levels available

240V, used for street lighting applications415/550V, used for the majority ofindustrial applications

660/690V used on large industrial siteswhere a higher voltage is required for longcable runs

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BS88 240V Street Lighting Range

Parts numbers are SMD and STD

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BS88 Industrial 415/550V

Typical part numbers AA032, BAO63 etcRatings from 2A to 1250A

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BS88 Bolted Tag Variants

Offset bolted tag

Centre Bolted tag

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BS88 Offset Bladed Tags

Part numbers NSD or ESDRatings from 2A to 63A

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BS88 660/690V Range

660V fuse are only fuses suitable for use on 690V system

BS88 spec allows fuse tests at 660V +10%

IEC269 spec allows fuse test at 690V +5%

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BS88 660/690V Range

Typical part numbers are; 6H07-660, K07-660.

Dimensions similar to 415/550V versions.

Ratings from 2A to 500A

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Special Tag Variants

Some None standard tag variants aremanufactured for certain applications

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BS88 DC Fuses

DC is much more difficult to use than AC

Special DC fuses from 10 to 63A areavailable

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BS Fuse Characteristics

BS fuses have three main fuse characteristics: • gG/gL means general purpose fuse link(all fuses mentioned so far)• gM means special fuse for motor circuits• aR means high speed back up fuse forshort circuit protection only (shown innext session).

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BS Motor Fuses

Dual Current Rating- Thermal Current Rating (normal rating)

- Rating for Characteristics (Starting current)

Part Numbers- Reference + Thermal Rating + M +

Characteristic Rating EF400M500, NSD32M50

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Other British Standard Fuses

Domestic Plug fuse is BS1362

• Ratings from 1A to 13A

• 240V Rating

• 6KA Breaking capacity

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Other British Standard Fuses

House service and consumer unit fuses areBS1361Ratings from 5A to 100A415V rated33KA Breaking capacity

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BS88 Fuse holder

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House Service Cut Out - NEW

• House Service Cut Out (HSCO) is a fuse holder used to hold House Service Fuses (Bussmann part numbers LR85 and KR85)

• Usually owned by the electricity utility.

• Every home in the UK and Ireland has one installed.

• The HSCO is located next to the electricity meter.

• It is used with the House Service fuse to protect electricity meter from short circuit and over current faults.

• Normally sealed by the utility to prevent unlawful entry to the holder and electricity theft.

ConsumerUnit

ElectricityMeter

HouseServiceCutout

Three Pole ApplicationSingle Pole Application

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Stepped cable entry grommetscan be cut to suit cable diameter,reducing installation time.

High contact force produces low resistance between carrier andbase, improving thermal characteristicsand reducing power loses.

Captive socket headed terminalscrews, preventing loss of screws,saving time during installation.

Easily identifiable neutral/eartharrangements:SNE has a white labelCNE has a black label

Combined or separate neutral/earth modulescan be fitted on either side of the base unitenabling flexible configuration, reducinginstallation time and inventory.

Cable entry plugs on terminalprevent unauthorised access,reducing the risk of electricity theft.

Serrated terminals suitable of accepting up to 35mm2 aluminiumand copper conductors reducing cableloosening issues and subsequentresulting damage to installation.

Reversible shatterproof DMC cablecovers, available in single pole andtriple pole versions, providingadditional security from electricitytheft.

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british standard fuse links - pro fuse international british standard fuses house service and...

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