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EMERGENCY RESTORATION SYSTEM


General Information



Transmission line emergencies do occur. Whether caused by exceptional acts of nature or by accidental or intentional acts of mankind, transmission lines are vulnerable to mechanical failure.

When critical transmission lines are lost the economic, social and political costs can be extremely high, typically exceeding millions of dollars per day. In some areas, the political consequences of prolonged disruption in the electrical power supply may far exceed the economic costs.

Whether the costs are economic or political, the world's dependence on electrical power makes a transmission Emergency Restoration System (ERS) a requirement for any transmission asset owner.



Sabotage of a critical 500 kV DC transmission line necessitated the erection of this Lindsey Emergency Restoration Structure. Total erection time was 5 ½ hours.

Typically, two of the most difficult requirements for restoration of a damaged transmission line are construction of a new foundation and replacement of damaged tower steel. Tower steel is often stocked; however, predicting the requirements for every possible failure and stocking all the necessary material is difficult and not economically feasible.

A more effective and economical solution is the Lindsey ERS. This structure requires no special foundation, can be used at any voltage level for suspension, angle or tension structures, and has standardized components.

The Lindsey ERS was developed to facilitate transmission line restoration in the shortest time possible. The Lindsey ERS consists of:

Lightweight welded aluminum modular structures. All Lindsey ERS components are manufactured and tested in accordance with the internationally recognized IEEE Standard 1070. This insures compatibility of components and ease of assembly, and allows asset owners to share Lindsey ERS components during major disasters



Insulators and Line Hardware for all voltages

  

Anchoring Systems for normal, swamp or rock conditions

  



All necessary construction tools for erecting an ERS Structure, stored in secure 20ft containers

  



Training for engineering and field personnel

  

ProSpot® Computer programs for quick and easy analysis, of any structure as well as construction loads

  

Planning for future Emergency situations and continued technical support (See general information about Lindsey Consulting) for both current Field Emergency Construction and Engineering Analysis.



The components of the Lindsey ERS can be quickly assembled and erected using a variety of techniques, including: cranes, helicopters, and a variety of gin poles or derricks.

Using the modular Lindsey ERS components, several types of structures can be constructed.



 Chainette: This 400kV Lindsey ERS is supporting the line during re-construction of the permanent tower.


  Single or Double Circuit Herringbone: This double circuit 230kV ERS was built after a major disaster. The second picture shows the same "temporary" ERS still in service 8 years later.
Four Column: This 400kV ERS was built in one day to support lines from a nuclear plant. Spans were over 800m on either side.


  Horizontal-Vee: These 220kV ERS were built to support the line after the permanent double circuit tower was washed into a flooded river. Both circuits have been restored using the Horizontal-Vee Lindsey ERS.


  Three Phase Running Angle: This 30 degree 500kV Lindsey ERS was built to restore power after the permanent tension tower was sabotaged. The Lindsey ERS remained in service for over 20 months before the permanent tower could be rebuilt.
Horizontal Tension: These 400kV, 90 Degree Tension (or Dead End ERS) were built as part of a bypass during construction in the substation.
  Vertical Three Phase Tension: This 230kV ERS In-Line Tension (or Dead End ERS) was built after a major disaster. The second picture shows the same ERS still in service 8 years later.

Lindsey has supplied over 1000 Emergency Restoration System structures to over 50 Electric Transmission Asset Owners, in over 20 countries. Our extensive experience in tailoring a complete Emergency Restoration System (ERS) insures that your specific needs will be met. Lindsey in conjunction with Lindsey Consulting Services (See general information about Lindsey Consulting) can help you asses your transmission line emergency response capability and help you prepare a customized emergency response plan that best fits your system.



Each Red Dot represents a major Transmission Asset Owner that has purchased a Lindsey ERS.
Copyright © 2005 Lindsey Manufacturing Co.