installing cable

7/29/2019 Installing Cable

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Installation of cable in the ductInstallation of cable in the duct


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Cable Installation Techniques

PushingPushing

Pulling (Hand Pulling)Pulling (Hand Pulling)

Preinstalled cable in the ductPreinstalled cable in the duct

Water FloatingWater Floating

Cable JettingCable Jetting

A method of long distance pulling cableA method of long distance pulling cable


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Hand pushing

Trailer or Drum Stand

with Cable Drum

Cable

One Person Pushing the Cable into Duct

HDPE Telecom Duct

CableCable PushingPushing


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with Cable Drum

Cable

HDPE Duct with Rope

One Person Making Figure 8

One Person Pushing the Cable into Duct Two Persons Pulling the Cable with Their Hands

Manual PullingManual Pulling


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Cable


with Cable Drum

One Person Put Lubricant into Duct HDPE Duct with Rope

Inlet of Pulling

LubricantMiddle Capstan Winch

One Person Operating Winch

Rope

SUPERJET

HDPE Duct with Rope

A Method of Long Distance Installation


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Preinstalled cable in ductPreinstalled cable in duct

Optic Fiber Cable

Duct

We can preinstall cable or micro-ducts into duct in factory or worksite for different areas


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with Cable Drum

SUPERJET

HDPE Duct

Water Pump Water Tank


with Cable Drum

SUPERJET

HDPE Duct


with Cable Drum

SUPERJET

In some jetting condition, the length of cable floating is two times of cable jetting

Water Floating TechniqueWater Floating Technique


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HDPE Duct


with Cable Drum

SUPERJET or CABLEJET

CableAir Compressor (10-12Bar

Pressure, 10M3 Airflow volume)Air hose

Cable JettingCable Jetting


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High Speed Air from Air Compressor

Inlet chamber of SUPERJET/CABLEJET

HDPE Duct

Cable Feeder of

SUPERJET/CABLEJET

Cable

Cable Insert

Open end

Duct Insert Free end

High speed air flow

Principle of Cable JettingPrinciple of Cable Jetting

Cable Jetting is a technique wherein the cable is laid into the duct by means of pushing

it at the duct entry point & a high speed air into the duct, exerts a drag there by

assisting its progression.


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Due to absence of any pulling forces, friction occurring at

bends are minimized

Advantages of Cable Jetting

Cable is installed into the duct by a gentle push & thepushing force is evenly distributed.

High friction point Low friction point

Pulling Cable Jetting


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Trajectory influence of the route is minimised.

As the cable is not subjected to any installation related

stresses its life is prolonged

Light, unarmoured cables can be efficiently & safely installed

Advantages of Cable Jetting

Long sections of cables can be installed.


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Save on manpower

Single joint during repair of cable.

Future installation is easy

Faster Installation rate - faster project completion

Advantages of Cable Jetting (Cont...)


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Based on the type of cable feeder, two feeders are

available.

A CableJet Machine

A SuperJet Machine

Push Mechanism


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Air Compressor ( 12 Bar, 400CFM)

95 % of air from the compressor enters into

the duct which creates the dragging effect

Pneumatic Motor

Silicore Duct

High Pressure air inlet chamberTraction Rollers

Cable

5 % of air from the compressor enters into the

Pneumatic Motor which rotates the Rollers

AIR CONTROL UNIT

1000 -2000 meters or more can be installed by CABLEJET

Work principle of CABLEWork principle of CABLEJETJETMachineMachine


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Salient Features of Cablejet

Can Jet:

QAt a speed of upto 100m/min.

QDuct from 25mm up to 63mm.

QCable from 9mm upto 15mm.*

* For smaller sizes additional attachments are to be used.


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CableCableJetJet at Worksiteat Worksite


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Air Pressure chamberHydraulic Motors

Cable feeder

Hydraulic HosesPower pack

speedometer

Air inlet chamber

SuperJet Machine


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From power pack to supply Hydraulic oil into the motor

Hydraulic Motor

Air Pressure inlet chamber

Silicore duct

Caterpillars

Air Compressor ( 12 Bar, 400CFM)

Hydraulic Superjet is driven by two hydraulic motors. Power is supplied by a hydraulic power pack, which is driven by Petrol Engine.

It has a greater pushing force allowing the efficient placement of heavier and stiffer cable such as heavily armoured optic fiber cables.

Work principle of SUPERWork principle of SUPERJETJETMachineMachine


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QCable from 14mm upto 32mm*

QCan jet at a speed of upto 60m/min.

QDuct from 25mm up to 63mm.

* For 9-14mm O.D. cable should be laid at a slower hydraulic oil pressure and radial pressure.

Salient Features of Superjet

Can jet:


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SuperSuperJetJet at worksiteat worksite


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Factors Influencing Jetting lengths

H Coefficient of friction of the duct

H Recommended ratio of duct ID to cable OD

H Duct Laying

H Route trajectory

H Cable Weight & Stiffness

H Capacity of Compressor

H Ambient temperature.


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Always carry spare couplers, end plugs and other tools andaccessories.

Always clean the cable of mud, dirt before blowing and duringblowing.

Recommendations for Better Jetting Efficiency (cont..)


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Methods of Cable JettingCascaded Blowing

Air Compressors

SUPERJET/CABLEJET


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Methods of Cable JettingCascaded Buffering

A B

B C


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Mid-point Buffering

Methods of Cable Jetting

A direction Middle-point B direction


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Thank youThank you&&

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installing cable

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