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MITSA INTERNATIONAL

Live Line Specialty Tools & Maintenance

Hot Line Washing Saftey Test – Part 3

December 16, 2016 By admin

A third test was conducted on contaminated insulators. Firstly, they were flashed over, then washed, then flashed over again. During the process the voltage was noted when the second flashover occurred, thus establishing the effectiveness of the “washing”. An important note to add is that most of the insulators obtained full insulation ability.

The importance of having clean insulators stems in the issue of avoiding power loss due to leakage along the insulator chain. The testers had established that 1 milliampere would be the maximum acceptable limit of leakage current. Through a series of trials the optimal water pressure and distance had been found. Further, the testers also determine that special equipment had to be used in the washing. Initially fire and gardening hoses had been used, but due to the inability at being able to achieve the optimal pressure, hoses with smaller orifices, allowing greater pressure, were developed.

Filed Under: EHV, Insulator washers, Maintenance, MV, Training Tagged With: Energized Maintenance, Hot Line, Hot line tools, Hot Line Training, Insulator washing equipment, Live Line

Live Line Consulting – Pakistan

November 10, 2014 By admin

Live line consulting project in Pakistan. Below are photos of a 132 KV suspension tower insulator replacement.

Filed Under: Consulting, EHV, Maintenance, Training Tagged With: Consulting, Energized Maintenance, Hot Line, Hot Line Training, Live Line

Harouge Oil Training – Class 2

November 29, 2013 By admin

In November 2013, MITSA completed a second 6 week training course with Harouge Oil Company. This was a basic introductory course to live line maintenance. Below are some training photos from class 2.





Filed Under: MV, Training Tagged With: Hot Line, Hot line tools, Hot Line Training, Live Line

Harouge Oil Training – Class 1

November 28, 2013 By admin

In October 2013, MITSA completed a 6 week training class for Harouge Oil. Below are some photos for class 1.







Filed Under: MV, Training Tagged With: Hot Line, Hot line tools, Hot Line Training, Live Line

Hot Line Washing Safety Test – Part 2

July 16, 2013 By admin

The tests that had been run took place in a district were some insulators were being washed, whereas others were not. After light rain and fog, 57 pole tops had caught on fire along with 12 circuit interruptions in the unwashed section. On the contrary, no issues whatsoever  occurred on the washed insulators. The effect of adding other materials in water for washing was a test subject. An abrasive material (Grand Monterrey Sand) had been added to to a water stream. Effectively speaking, this abrasive material had been found to make no difference in washing contaminated insulators. Instead, the abrasive material posed a threat for clogging up the nozzle, thus disrupting the flow of water. Unfortunately, when put against cement and petroleum based materials, water had only been effective to a certain degree.

Filed Under: Insulator washers, Maintenance, Training Tagged With: Energized Maintenance, Hot Line, Hot Line Training, Insulator washing equipment, Live Line

Hot Line Washing Saftey Test – Part 1

June 11, 2013 By admin

In order to assure that mixing water with electricity is a safe process, several power companies have run extensive tests on washing energized insulators. The first recorded tests were done in 1941, by Pacific Gas & Electric of California. In 1947 the same company re-conducted and documented the tests. They wanted to determine the following results:

  1. The true effectiveness of cleaning the insulators with water.
  2. Record the amount of leakage that had occurred through using different water streams.
  3. Test various nozzles sizes and shapes, different water resistivities and “new” water resistivity testers.
  4. Evaluate the economics of washing, using this method.

Filed Under: EHV, Insulator washers, MV, Training Tagged With: Energized Maintenance, Hot Line, Hot line tools, Hot Line Training, Insulator washing equipment, Live Line

Live Line Training in Jordan

September 2, 2012 By admin

Between 2006 and 2012 we conducted multiple live line training programs in the county of Jordan.  During this period, we have trained linemen and engineers in safe working practices for Live Line Maintenance at LV (220/380V), MV (11/33 kV) and EHV (400 kV).

Our satisfied customers in Jordan include:

NEPCO (National Electric Power Company) – 28 linemen and engineers

IDECO (Irbid District Electric Company) – Over 60 linemen and engineers

EDCO (Electricity Distribution Company) – Over 60 linemen and engineers

Filed Under: MV, Training Tagged With: Energized Maintenance, Hot Line, Hot Line Training, Live Line

Hot Line Training – 500 kV Live Line Bonding

August 22, 2012 By admin

Below is a Laboratory Demonstration of Hot Line bonding on to 500 kV.

https://www.mitsacy.com

Filed Under: EHV, Training Tagged With: Hot Line, Hot Line Training, Live Line

Hot Line Training – Tower Self-Rescue

August 2, 2012 By admin

Below is a Self Rescue video taken during 400 kV training with NEPCO in Jordan.

https://www.mitsacy.com

Filed Under: EHV, Rescue, Training Tagged With: Energized Maintenance, Hot Line, Hot line tools, Hot Line Training, Live Line, Pole top rescue

Hot Line Training – Pole Top Rescue – Method 2

July 8, 2012 By admin

Pole Top Rescue – Method 2

Posted by MITSA Live Line Maintenance on Thursday, June 14, 2012

Below is a pole top rescue video taken during training with IDECO in Jordan.  This method uses a separate rescue line to lower the victim to the ground.

https://www.mitsacy.com

Filed Under: MV, Rescue, Training Tagged With: Hot Line, Hot line tools, Hot Line Training, Live Line, Rescue

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