|
|
 |
|
Catastrophic Consequences
The Risks Of Cable Duct Sealing Failure
Failure to correctly and effectively seal cable ducts can inflict catastrophic damage to LV HV electrical
distribution networks, substations and power supply.
--------------------------------------------------------------------------------------------------------------------------
Duct seals are installed to reinforce the flood defences of LV MV HV substations protecting critical low, medium and high voltage cables and electrical equipment. Typically at:
‣ Medium Voltage (11kV/33kV)
‣ High Voltage (66kV-132kV)
‣ Transmission & Distribution Grid Networks
T&D distribute proven cable duct sealing products from leading manufacturers Filoform with widespread DNO and water utility approvals and industry acceptances, including WIMES.
+ Trusted alternatives to traditional “sticky and tricky” to install mastic seals or regulation violating expanding foam
+ Guaranteed protection without the risk of failure
|
|
|
|
Filoform FiloSeal +HD is a duct sealing system that is able to seal large heavy armoured power (multicore XLPE SWA) and high voltage cables.
-
Strong support system using hexagonal tubes
-
Re-enterable seal with honeycomb structure
-
WIMES compliant (3.02 Clause, 7.4.3.2d)
-
Approved for use by UK DNO's and utilities
-
Gas and water tightness for cable ducts up to 250mm outside diameter
|
|
|
Filoform FiloSeal+HD FIRE is a new highly certified fire, gas and water duct sealing system for both ducts and cable transit frame systems.
Tested to BS EN1366-3 2009.
-
Strong support system using fire resistant hexagonal blocks
-
Made of specially formulated material called ‘Formite’
-
Suitable for sealing empty or any cable configuration or pipes contained in one duct
-
Suitable for sealing LV MV HV cables into substation ducts where fire protection is required
Blog: Fire Stopping Cable Ducts
|
|
|
FiloSeal+HD FIRE has now been tested by London Underground for the safe and effective sealing of cables and ducts on the underground rail network.
The duct seal system has been rigorously and successfully tested against smoke and toxicity emissions according to LUL S1085 Standard.
|
|
|
A case study of a cable sealing and substation asset protection project in the USA.
The MV medium voltage cables are installed 20 meters underground in a substation that is providing electrical power distribution to a subway metro station.
This is one of many sites where they have ongoing moisture problems associated with floodwater and environmental conditions.
By using FiloSeal+HD the client improved the environment inside the substation, reducing moisture, which was their electrical and substation protection objective.
|
|
|
Severn Trent Water
The Whitacre / Warwickshire team identified a shortfall in the way cable ducts are sealed following installation of new and the maintenance of existing assets.
Several options to securely seal cable ducts have been investigated with support from Water R&D at the water utility.
|
|
|
Project Information
All 3 types of FiloSeal cable duct seal systems were required; original Filoseal+ with foam backing, newer Filoseal+HD for heavier cables and the newest seal type Filoseal+HD FIRE which adds BS EN1366 Part 3 with up to 4 hours of fire protection.
All four cable duct seals were installed according to instructions whilst special guidance and tips were given on site by the manufacturer
|
|
|
Project Information
The Filoseal cable duct seal system was selected to seal 50mm and 110mm outside diameter cable ducts to provide up to 2 bar Pressure Resistance and prevent water ingress into the low voltage control rooms effecting sensitive electronic and electrical equipment.
|
|
|
Filoseal+HD duct sealing kits have been tested to provide watertight, gastight and/or fire resistant cable seals and were thus specified to fill in the voids in the concrete core drilled holes at the data centre.
The duct sealing system has been heavily tested against pressure, pulling forces, chemicals, gases and hydrocarbons for use with low, medium and high voltage cables.
|
|
|
|
|
Thorne & Derrick supply 3M Electrical, Prysmian, Filoform and SPS low voltage cable joints suitable for connecting and jointing single and multi-core/pair power, control and instrumentation cables up to 600/1000V (3.3kV) in industrial and hazardous area
locations.
Specialist applications include fire resistant, low smoke zero halogen, hydrocarbon resistant and utility cable joints utilising Cold Shrink or Scotchcast resins.
|
|
|
|
|
|
|
|
|
|
|
Cable cutting tools to suit LV-HV cables with copper or aluminium conductors, steel wire armoured (SWA) / braided cables with lead sheath and insulation types including XLPE, EPR and paper types – commonly used to cut armoured LV cables and medium/high voltage power cables 11kV-33kV, single and 3 core type.
Cable crimping tools using hydraulic or battery operated to crimp conductors 1.5sqmm-1000sqmm suit aluminium and copper conductors with sector shaped, stranded or solid cores.
|
|
|
Cable jointing tools for stripping and preparing low, medium and high voltage power cables including 11kV, 33kV, 66kV and 132kV-400kV polymeric cables with XLPE or EPR insulation and bonded/peelable semi-conductive cable screens.
T&D distribute Cable Jointing Tools from leading manufacturers including Alroc, Ripley, Boddingtons and Hivotec for all types of LV, MV or HV cable stripping, preparation and jointing requirements – insulated tools are available for live-working on low voltage cables, joints and electrical equipment up to 1,000v.
|
|
|
Cable protection covers, tile tapes and underground warning tapes are installed over LV, MV and HV power cables in trench and ducted cable installations with high visibility colour providing a visual warning of danger when excavating cables.
11kV and 33kV cable protection tapes (Tapetile and Stokbord covers) are manufactured from heavy duty plastic for reliable protection.
Underground protective covers are used to provide a clear and effective visual warning to the presence of LV-HV underground cables, cable duct or high voltage cable joints.
BLOG : Tape Tile & Stokbord Cable Protection Covers For MV HV Power Cables
|
|
|
|
|
Cable Transits manufactured by Roxtec to provide effective sealing of single and multiple low and high voltage cables and ducts against constant water pressure, fire spread and gas migration.
Extensively specified in the Utility Power, Transmission & Distribution sectors for sealing cable ducts and protecting 11kV/33kV medium/high voltage substations against flood risk.
|
|
|
|
|
T&D supply both standard and bespoke feeder pillars in a selection of materials, paint finishes and dimensions to meet all indoor and exterior power distribution, control and lighting requirements up to 1,000 volts with IP65 door seal – this includes LV substation and network pillars with DNO supply cut-outs for utility applications.
|
|
|
|
|
In this BLOG we discuss to processes and Furse products used for the Earthing of electricity substations with site installation photographs from an EHV 275kV substation earthing project.
|
|
|
|
|
|
|
BASEC are collaborating on knowledge and content sharing with Thorne & Derrick.
With a shared passion and ambition to enhance LV MV HV electrical safety by the education of industry stakeholders to specify and buy accredited, tested and certified Quality Cables & Cable Accessories.
|
|
|
The following article has been republished with kind permission of Martha Davis (Senior Director of Content – T&D World and Utility Analytics Institute) from Transmission & Distribution World and their video sponsor Burns & McDonnell.
The 5 Videos videos are real-life and shot-on-site, showing transmission and distribution crews and splicers at work.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
