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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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