Proposed Short circuit test: The attenuation coefficient to max allowed increased 0.05 db/km from the point of strike.

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Eustace Cannon
6 years ago
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1 Proposed Short circuit test: The attenuation coefficient to max allowed increased 0.05 db/km from the point of strike. Test Short-circuit current 6kA 9kA 20kA Duration 1.0Sec 0.5Sec 0.1Sec 46

2 Proposed Lightening resistance test 10 Coulomb; Duration 5 ms. 100 Coulomb; Duration 500 ms. The attenuation coefficient is to not increase than 0.01 db/km at the point of strike. 47

3 Strain margin The optical fiber design does not allow excess strain margin. Residual cable elongation is obtained by applying EDS tensile load. Special care is taken for loose tube design. 48

4 Resistance to fatigue and installation load The OPGW able to withstand the high frequency (>1Hz) and showed by low frequency(<1hz) vibrations. The Fatigue load is same as specified by IEEE 1138standerd. 49

5 Proposed Sag and tension Everyday tension condition: At the average temperature (15 0 C), with no wind, the every day stress (EDS) does not exceed 20% of the calculated breaking load-stress. Maximum load condition: Maximum design wind Reduce ice load Minimum temperature 50

6 Proposed safety factor Partial safety factor for actions:1.35 Partial material safety factor:

7 ADSS- [Aerial Dielectric Self-Supported] Installed at the center of Pylons/ Poles/ Structures Cost much less than OPGW or WRAP type Suitable for hot line installation without deenergization of line Large Fiber capacity It is used as telecommunication purposes on high voltage power lines. Typically the life span of ADSS is 10 to 15 years. 52

8 Overview of ADSS Cable ADSS is a self-supporting optical fiber cable. It has no metal component and can be installed on live lines with no outages. Hundreds of thousands of miles of ADSS have been installed all over the world, on power lines rated up to 500kV. Area of Application On Power Lines On Street Light Pole From Pole to building Cable Selection These cables can be designed for almost any combination of environmental and sag/ tension requirements. Based on our detailed survey of site conditions, we supply an optimal choice of ADSS cable with other accessories. ADSS Installation Technique The lifetime of ADSS on power lines will depend on the following factors Electrical 1. Space Potential Effect 2. Corona Effect 3. Dry-Band Arching Mechanical 1. Span Lengths and Sag 2. Tension on Cable Environmental 1. Wind Velocity and Aeolian Vibration 2. Sheath Composition for UV Resistance 3. Temperature and Pollution Level 53

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Marine pollution causes dry band arcing and sheath

Due to this maximum permissible voltage for optical

11 Marine pollution causes dry band arcing and sheath failure. And to avoid it the electric field gradient and the buildup of the contaminants should be under control. Due to this maximum permissible voltage for optical phase wire is 132KV. However, ADSS cables are now known to be successfully installed at 400kV Towers 56

12 CORONA EFFECT corona discharge occur due to High electric field, which can cause puncture and failure of cable jackets. We provide Corona Rings for protection of the cable. 57

13 Wind Velocity and Aeolian Vibration 58

14 ADSS INSTALLATION 59

Supreme offers OPGW cable from suppliers in China and ADSS from manufacturer in India along with a range of accessories and tools produced in house.

Fiber Optic toolkit - (Cold Cure epoxy type) Fiber Splicing kit - mechanical type (Fiberlok 2501) DTX Cable Analyzer Complete survey, design and implementation of network we are also equipped with

fiber core for faster termination & core or core joining of fiber, no requirement of power source during splicing using fiber optic toolkit (cold cure epoxy type) & fiber splicing kit mechanical type

15 Supreme offers OPGW cable from suppliers in China and ADSS from manufacturer in India along with a range of accessories and tools produced in house. Apart from above following services are offered in JV with Netwings Infotech Pvt. Ltd. for providing complete retrofit solution or for construction new lines. Fiber Optic toolkit - (Cold Cure epoxy type) Fiber Splicing kit - mechanical type (Fiberlok 2501) DTX Cable Analyzer Complete survey, design and implementation of network we are also equipped with GPS etrex which Makes survey work on difficult terrain easier and most precise in terms of location and latitude, longitude, altitude, distance, tracking speed path/route defining Termination of fiber core for faster termination & core or core joining of fiber, no requirement of power source during splicing using fiber optic toolkit (cold cure epoxy type) & fiber splicing kit mechanical type (fiberlok 2501) Use of DTX Cable Analyzer for revolutionary new future-proof platform for cable testing. Advanced Supervision for locating cables more effectively at patch panels, switches, termination blocks, or hidden within bundles for IntelliTone Pro 200 Kit Trouble shooting for field cable with SLT-3 tester Laying of OPGW/ ADSS on Power lines Using existing telecom or municipal poles for stringing ADSS Complete Turnkey solutions Training customers in the training center at factory or on-site. Intellitone Probe GPS e Trax Vista Fitel S177A Core- Alignment Hand-Held Fusion Splicer DTX Cable Analyzer Python Duct Rodders 5/16 Length 300mtr AQ7275 Optical Time Domain Reflectometer Optical Laser Source Cable IQ Qualification Tester 60

16 Q: Which should we use - OPGW or ADSS or Sky Wrap? Ans: The answer depends on many factors. When we are building a new transmission line and shield wires must be installed. In that scenario, the incremental cost of installing optical ground wire versus standard shield wire is minimal while the benefits of a fiber optic network for internal communications, grid management, etc. are profound. Similarly, on an existing transmission line, if the shield wire is aged and needs to be replaced, that is the perfect opportunity to install optical ground wire. ADSS is ideal for installation in distribution as well as transmission environments, specially when live-line installations are required. Sky Wrap is helically applied on ground wires or phase conductors, and it is the ideal solution when access to overhead lines is problematic due to rugged terrain or outage limitations. 61

OPGW unlike ADSS is not susceptible to damage on account of electrical

17 For EHV transmission line, OPGW Which can now be installed live is considered a better retrofit solution to ADSS. OPGW unlike ADSS is not susceptible to damage on account of electrical field. This has the Added advantage of re-strengthening weakened earth wire. OPGW Lash or Wrap 62

18 THANK YOU

OPGW and ADSS Fiber Cable. For Overhead Transmission Lines

OPGW and ADSS Fiber Cable. For Overhead Transmission Lines OPGW and ADSS Fiber Cable For Overhead Transmission Lines PRYSMIAN GROUP VISION, MISSION, VALUES Vision The Prysmian Group believes in the effective, efficient and sustainable supply of Energy and Information