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Introduction

to

Implosive

Connectors

9 June 2011

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VP metall AS

VP metall is situated in Raufoss Industrial Park, where you find the leading know-how in metallurgy and machining technology in Norway.

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VP metall AS

Activities:

Production of Implosive Connectors

Machining of:

Aluminium

Copper

Brass

Steel

Hot forging

500 ton press

Designing and construction of tools

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VP metall AS

Activities cont.: Punching and bending

Presses up to 100 tons

Designing and construction of tools

CNC-machining

Unisign, 12000 r/min, 52 tools, vertical mandrel, 4 axes

MAZAK H 400, 10000 r/min, 30 tools, horizontal mandrel

Mazak QT 250, drill/mill 12 tools,

4 axes

Machining and assembly of automotive parts for SAAB

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History – implosive fittings 1965-1968

Development. Cooperation between RA NVE,

FFI and SINTEF

1968

Plastic explosives on steel First installation, NVE, 2

detonations

1970

Split steel tube 1 detonation joints for FerAl

conductors, (1RA)

1976-1977

2RA (Norway only) Short type 1979-1980

3RA (Skandinavia) Profiled tubes, spiral

1983-1984

4RA (Dead end / jumper terminal) 2000

VP metall AS buys the product and the rights connected to it, from Raufoss

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Implosive Connectors

Implosive Connectors utilize the energy in a small implosive charge to compress a metal sleeve over conductor or wire.

The pressure is applied instantaneously (1/10 000 sec.) and the compression of the sleeve and cable is performed with a high degree of accuracy.

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Implosive connectors include:

full tension joints dead-ends jumper terminals repair sleeves full tension repair joints non-tension sleeves compression rings miscellaneous other fittings The Connectors can be used on dry conductor, fully greased aluminium alloy conductors and ACSR conductors with greased steel core. Connector components have been standardized to fit all common conductor types.

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Implosive connectors for:

Al. conductors from 50mm2 till 1584 mm2

FeAl conductors from 50 6/1 till LOMVI

(1 detonation) Special conductors (2 detonations) Fjord crossings Steel conductors from 39 mm2 till 900 mm2

(Greenland)

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The system provides:

Consistant high quality

Optimum compression

Only radial deformation

Reduced installation time

Less total installed cost

Faster stringing

With this system buying, using, maintaining, storage and transportation of hydraulic presses or other compression tools is unnecessary!

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Dead-end for ACSR conductor

1 of 2

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Implosive charge

Dead-end with coil

PVC hose

Al tube with

connector pad

ACSR conductor

Dead-end for ACSR conductor

2 of 2

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Full tension repair joint for ACSR conductor

1 of 2

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Implosive charge

Steel tube with coil

PVC hose

Aluminium tube

ACSR conductor

Solid bolt

Full tension repair joint for ACSR conductor

2 of 2

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Full tension repair joints

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Accessories

REPAIR SLEEVES

Repair sleeves restores the conductivity of a conductor with one or more broken strands. The implosive charge is mounted on one half of the sleeve and is taped together before compression.

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Accessories

COMPRESSION RINGS

Compression rings are made for use in handling and sleeving large conductors and special conductors with aluminium alloy strands. They will make the installation work a lot easier.

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Other areas of use Implosive Connectors may also be used

for other purposes.

As shown on the next page, Implosive Connectors are used in connecting steel wires between two bridgeheads. Here at the construction of the bridge “Höga Kusten” on E4 north of Stockholm, Sweden.

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Transition joint (ex. Between Al and ACSR conductor)

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Testing and quality assuranse:

Production

VP Metall is certified to meet the requirements in of NS-EN ISO 9001: 2000, and NS-EN ISO 14001: 2004

The implosives connectors are approved for -marking by PvTT.

Each new type of Implosive Connectors are tested at Sintef. (Trondheim, Norway)

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- certificate

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Safety: Wooden boxes for transportation – approved by DNV

Basis for approval:

Drop-test

Fall from 25 meters with 3 stk. Curlew connectors, repeated 7 times.

CONCLUSION: Deformed connectors, but no detonation of explosives.

Hazard-test

Detonation test under storage.

CONCLUSION:

1: Mass explosion in one box.

2: No mass explosion in other boxes nearby (no transmission of the detonation).

3: The explosives burned without detonation.

Classification: 1.2 D

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Regulation regarding transportation:

Each company dealing with Implosive Connectors must be updated on local regulation regarding transportation

From VP Metall to our customer:

Dangerous goods ADR transport

Transportation are carried out by Multisped AS, who have a lot of knowledge about transporting explosives

VP Metall’s responsibility ends when the goods arrive at the customer

Regulations in Norway

For transportation and handling less then 20 kg netto explosives:

Car: do not transport explosives in the passenger area

No requirement regarding marking of the car

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Storage:

Each company dealing with Implosive Connectors must be updated on local regulation regarding storage

Local regulations In Norway, permission for storage up to 250 kg

are given by local authority’s.

Requirement regarding personnel who handles the goods: Training and knowledge about handling and storage.

ONGOING PROJECTS FOR STATNETT

VP metall provides joints, pulling grips, dead ends and jumper terminals for these projects:

Sauda – Liastølen

Sima – Samnanger

Skogfoss - Varangerbotn

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Changing old joints

Through several years Statnett has replaced old non-implosive joints with implosive repair joints.

Including also dead ends and jumper terminals.

Repair dead ends, repair sleeves and other special solutions.

Customer’s request – our challenge!

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Marking on each joint: - Cat.no - Production month and year - CE-no

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Building transmission lines over…

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…a Norwegian Fjord…

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…using Dead-ends

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Pictures from changing Dead Ends at Sognefjorden

Lenght across the fjord – appr. 4500 meters

Break load at 90 tons

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