Proven and Reliable Anti-Galloping and Anti-Vibration Technology
for Safe and Secure Delivery of Electric Power and Broadcast Power
Our motto is "install it and forget it."
For over fifty years AR Products, LLC working in concert with Research Consulting Associates, research and development, have patented proven and reliable anti-vibration devices and anti-galloping devices for transmission lines and broadcast towers. "Proven and Reliable" are at the root of the culture of both entities. The approach used has been to combine analysis and measurement to support each other in the development of new and useful technology, leading to commercial products.
Some Examples of AR® Proven and Reliable Technology
More than 25 years has gone by since the first AR PRODUCTS device was installed at Niagara Falls, NY by the Niagara Mohawk Power Corp. Those units are still in place along with more than 2,000 additional units. These anti-gallop devices are protecting all nine circuits coming from the Hydro units at the American side of Niagara Falls. Click here for article: Consultants New Galloping Study finds 15 year old device still offers best control, 1984.
In another US location in Northern Indiana, several hundred AR® WINDAMPER® devices were installed at 138kV and 345kV by NIPSCO since the early 1990's. In addition, three steel mills in Northern Indiana installed several hundred AR® WINDAMPER® devices on their own lines at about the same time. Click here for article: WINDAMPERS help keep gallop-prone lines in service, 1995.
At about that same time a research grant from the US Department of Energy supported installation of a demonstration project at PSI Energy in Southern Indiana. Click here for study: A Study of galloping conductors on a 230kV Transmission Line, 1991. In this study it is shown by analysis how the twisting of conductors will control gallop. The study also compares two anti-gallop devices, (i) AR® WINDAMPER® and (ii) EPRI Detuning Pendulum. Data is obtained from the EPRI Progress Report No. 2 for EPRI project 1095, 1981. Data was collected by Ontario Hydro for 1977, 1978, 1979 for the two devices. The analysis shows that the first device is nearly 100 times more effective in controlling galloping than the second. All of the AR® WINDAMPER® devices installed in those years, and subsequently, are still protecting transmission lines, while none of the EPRI detuning pendulums installed under the EPRI 1095 project in the US are still installed. The examples above apply to the AR® WINDAMPER® product only.
The complete AR PRODUCTS LINE includes four other anti-gallop products:
|1. AR® TWISTER|
|2. AR® MOD-II SPACER DAMPER|
|3. AR® SNUBBER|
|4. AR® LIGHTWEIGHT SPACER DAMPER|
Each of these four products has established a firm position as well.
The above photos illustrate the broad reach of the company's achievements. First, is the development of installation by helicopter of the company's products. This includes AR WINDAMPER®, AR TWISTER®, AR SPACER-DAMPER®. Second, hot-line methods have been used for all four product lines. The latter, the AR SPACER TWISTER® is seen in the upper middle photo. Second, for the TV/Radio Broadcast Industry, there are two anti-gallop devices, the AR SANDAMPER®, and the AR SNUBBER®. The former is responsible for saving a tower during a heavy ice storm near Raleigh, NC, while the latter may be seen in action in one of the accompanying videos. Thirdly, for the control of Aeolian vibration, there are many proven models to choose from including, (i) piston type damper, (ii) canister type damper, (iii) ring type damper. All employ the same damping principle, kinetic impact. There is no messenger wire to wear out, nor is there any elastomer to wear out. It is all metal construction. Fourth, there is the special family Over-Sized SPACER DAMPER® devices. These have the unique features of increasing the critical wind speed at which galloping begins, and increasing the delivery capacity of the entire transmission line by reducing the inductance along the line. All AR SPACER DAMPER® designs can include that feature.