Technology

Stringing for transmission lines

Introduction

Transmission lines are created to offer a footpath for electricity to run from a source to an exact service area or intertie with the transmission grid. Conduction of electricity is divided by voltage level and ranges from 69 to 765 kV and can be higher than that. Many new transmission lines construction is working at high voltages commonly denoted as extra-high voltage (EHV) or voltage which is greater than 230 kV. The higher voltages become a reason to reduce power losses in long-distance transmission of electricity, thus permitting the system to operate effectively. EHV line construction needs more detailed manufacture measures and constructor proficiency than construction at lower voltage lines.

Transmission lines are planned and planned to meet National Electric Safety Code Standards and the principles of amendable authorities such as the North American Electric Reliability Council (NERC) overseen by the Federal Energy Regulatory Commission (FERC). Design and production must also fulfill regulations, rules, and laws set forth by federal, state, and local authorities.

Managing conductors

Managing the conductors and other accessories must be kept with care to reduce the chances of damage from scratches by rough handling or dirt and grit. Actual care is needed to make sure that the conductor does not become twisted or gets rubbed in any manner. If the conductor is being damaged, the affected area should be completely replaced or repaired.

Before doing stringing, starting and ending stringing charts for both conductor and earth wire showing the force for numerous temperatures and spans should be available. The conductors, joints, and holders shall be created in such a way that over-tensioning of separate wires or layers or other distortion or damage to the conductors shall occur. Holders or hauling devices shall, under production situations, permit no relative movement of components or layers of the conductors.

Maintenances of conductors, in the occasion of impairment being caused to inaccessible strands of a conductor during production, if essential, shall be carried out during the running out operations with repair sleeves. Fixing of conductor surface can be possible only in case of minute damage, scratch marks, etc. by keeping an eye on both electrical and mechanical safety necessities. The final conductor surface should be spotless, smooth, and shall be without any kind of projections, sharp points, cuts, scrapes, etc.

Stringing tension

Stringing tensions should be low as possible in the stringing process to diminish conductor creep. Conductor creep is considered a function of time, temperature, and conductor pressure that results in stable elongation of the conductor. Conductors which have been exposed to extremely high stringing tensions or who have been allowed to endure travelers for a long period will experience an irregular amount of creep. If this happens, the sag tables should be modified to reimburse for the extra creep elongation. If it is not, then initial fall tensions will be greater than designed and can result in conductor impairment due to vibration.

Stringing Tools for Transmission Lines

There is a wide variety and an extensive range of higher-worth transmission line stringing tools thatcan be provided to the customers. Stringing Tools for Transmission Lines have the following tools. So, let’s check its usability and features as well as its weight.

Hydraulic Winch Front-Drum Type for stringing

Featuresand Performances of this tool

Maximum Pulling Capacity: 10 kN

Speed: Slow and adjustable

  • kN ranges from 10 – 0 to 13 m/min‘
  • kN ranges 1 from 0 – 35 m/min’

Feature: Hydraulic circuit along with negative braking method.

COMPOSITION:

  • Dynamometer devise for straight reading of dragging value with pre-defined setting, load system device functioning by attaching winch at dynamoelectric bar
  • Control lever
  • Emergency pause button

DRUM /PULLING TOOL (detachable):

Completion of spontaneous level-wind device appropriate to rope having length up to 800 m/8 mm dia. and/or 500 m/10 mm dia.

FURTHER FEATURES:

  • Dynamoelectric bar along with anchoring accessories
  • Blocking rope device
  • Modifiable front pickets

ENGINE: Gasoline based engine air cooling, 11 HP I 8 kW by hand starter

LIFTING: Upper lifting attachment point, stable type

WEIGHT: up to 350 Kg

ELECTIVE:

  • The standard front drum is considered Mod. TS/1
  • Conical front drum is considered Mod. TS/1 C

Single Pulley Blocks

Single Pulley Blocks, these stringing lines are commonly used to accommodate the requirements of lifting needs in different factories, mines, farms, and many other places. These products are produced by using high basic material, at the retailers’ end. 

Some of the good points of Stringing Tools for Transmission Lines are given below:

  • Weighty duty
  • High tolerance capacity
  • Forceful manufacture
  • Steadfast functionality
  • Easy & timely operations

Wire Rope Hold Blocks

It is another Stringing Tool for Transmission Lines product that is greatly required in the market due to its actual use in electrical line operations. This Stringing Tool for Transmission Lines product is produced by using high-grade steel and has clusters fixed on ball bearings.

Further information

  • Each trade is considered is in a couple of blocks.
  • Weight: 5.5 kg.

Reason of usage

These stinging tools are much valued due to their high strength, log-lasting feature, and detailed design.

– Robustness

– Low preservation

– Heavy-duty principles

Prices of these stinging tools range from 400 US$ up to 1440 US$ and the more heavy stinging tool has a higher cost. According to your work or project, you can select and buy it. Because of its standard working, it is urged of using at a huge scale to get much better and satisfied results.

Final words

Transmission lines are considered as a source to covey electricity from the source to different destinations. Different tools are required to work with proficiency. Stringing Tools for Transmission Lines are a huge variety that is used for different purposes. Each has its usefulness. In this article, we have shared some of the important Stringing Tools for Transmission Lines that you should know about. If you have an interest in these gadgets then this article hopefully proved to be beneficial for you.

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