Recovery Machine -. Load limit : 12 ㎏f or more 60㎏f or more
Mobile Unit -. Runnin s eed. 30 m/min -. Climb angle. maximum 31 degrees -. Weight. 34g
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Accessories
Live- Live -Line Line installation Method
Swivel
Pulley Block Dead-end Stocking
Earthing Roller
Drum Stand Engine Winch
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Accessories
Live- Live -Line Line installation Method
Tension Assembly Set Vibration Damper Suspension Assembly Set
Fixing Clamp
Joint Box
Tension Tower
Tension Tower
Suspension Tower
Tension Tower
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Live- Live -Line Line installation Method
Preparation
Install OPGW drum with stand at the drum field and puller at the engine field. Preparative equipment, fittings along the situation of working field. e s r ng ng oc e a ac e a e op an o om par o ower.
Check the clearance between existing ground wire and live-line before stringing. The exercise been already done and recorded during the survey ground wire condition must be check a ain rior to start of installation. Remove the existing aerial spheres and vibration damper etc. Intervals of 10~20m to be maintained between supporting rollers.
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Installation of supporting roller
Live- Live -Line Line installation Method
Install supporting rollers using a mobile unit between spans. The mobile unit be shifted from higher tower to lower tower. . Mobile Unit
Existing Ground wire
Supporting Roller Guide Rope
Pulling Rope
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Live- Live -Line Line installation Method
OPGW Stringing
Fixing of supporting roller between towers by guide rope
Use swivel(2ton) for connecting OPGW
OPGW Stringing by using engine puller and reel winder (Pulling Tension Max.500kg)
Existing Ground wire Guide Rope OPGW
Swivel
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Turn-Over & Sagging
Live- Live -Line Line installation Method Upset
the OPGW at the position of exist ground wire using chain block tension equipment.
Chain block
Come-along
OPGW
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Remove exist ground wire
Live- Live -Line Line installation Method
Connect pulling rope to end of ground wire, and then withdraw ground wire.
OPGW Guide Rope Pulling Rope
Existing Ground wire
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Live- Live -Line Line installation Method
Retrieving supporting roller
Regain the pulling rope and supporting rollers to opposite direction between each span.
Retreat the ullin ro e on round b
ullin the Pullin ro e with uniform s eed b man ower.
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Safety Evaluation
Investigation of Tower & G.W conditions a e y ga ge s or wor men
Fixing of warning Flags
Clearance between Mobile unit and Conduct, OPGW and Conduct
Minimum Clearance Distance for Live Line Safety Evaluation by Simulation Program
Electrostatic Induction
Electro magnetic Induction
Dry Band Arcing Phenomenon
D namic Sa /Tension durin Installation
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Minimum Clearance Distance(ex.malaysia)
Safety Evaluation
Minimum Clearance Distance for Live Line
Voltage
275kV
Working
Phase to Ground
Phase to Phase
mm
mm
mm
3050mm
1740mm
4000mm
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Grounding from Inducing Voltage
Safety Evaluation
Du r i n g s t r i n g i n g o p e r a t i o n , a l l O PGW s h a l l b e g r o u n d e d b y u s i n g g r o u n d r o l l e r. [ Ground Roller]
OPGW Drum
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Dry Band Arcing In Rope
Safety Evaluation
Dr y b a n d a r c i n g p h e n om e n o n o c c u r b y p o t e n t i a l d i f f e r e nc e along the insulation rope during installation process Arc occur T h i s p h e n om e n o n c a n b e e s t i m a t e d b y p r o g r a m a n d c an b e r eve n t ed b a l l o c at in s u or tin roller s Wet
