TESTING

Eco Electrical Systems tested its first design at a High Voltage Lab in 2001. They were subjected to 15 and 25 kV dry and wet flashover tests. The test configuration consisted of a wood pole, an 8 ft. wood crossarm, and a wood brace to support the arm. The insulator pin was solidly grounded during all testing. Various insulators were used according to the voltage applied during testing. The conductor was 1/0 ACSR. A solid ground was attached to a hot stick and was used to contact the surface area of the insulator conductor covers to simulate a bird or animal coming in contact with two phases simultaneously at various points on the insulator, the insulator cover and the conductor cover.

Testing Results

Test Type

Results

 7.2 kV Dry Flashover

Pass

 15 kV Dry Flashover

Pass

 25 kV Dry Flashover

Pass

 7.2 kV Wet Flashover

Pass

 15 kV Wet Flashover

Pass

 25 kV Wet Flashover

Pass

FR Material Testing

Properties

Test Method

Time

UV Ageing

ASTM D4329

1,000 Hours

Electrical Testing

Test

Test Method

Time

Results

Tracking/Erosion

ASTM 2303

30 hours

No tracking or erosion

Dust/Fog

ASTM 2132

200 hours

No tracking or erosion

Dielectric

ASTM D-149

N/A

321 V/mil

Flammability

Test

Rating

UL 94

5VA/5VB

  • Reference partial discharge measurements were taken for each configuration prior to testing of the covers with no detectable increase when the covers were installed.
  • A dry flashover test was conducted according to ANSI C-29.1. The test configuration consisted of an ANSI Class 55-5 insulator. It was flashed 3 times and then the insulator conductor cover was installed and subjected to a flashover. The test did not alter the dry flashover characteristics of the insulator.
  • The wet flashover test was modeled according to IEEE 4.
  • A photo multiplier imaging device was utilized to determine if there was any discharge activity. No discharge activity was present on any Eco Electrical Systems designs.
    We also conducted wet testing on several other designs for insulator conductor covers and perching deterrents.

It should be noted that there are guidelines within the NESC (National Electrical Safety Code) that need to be adhered to for products that are attached to the supporting structure or the supporting arm of a structure. These guidelines are addressed in Table 235-6 of the NESC. In other words clearances from energized parts need to be maintained to prevent flashover and partial discharge from occurring.

Electrical Testing of Prototype Wildlife Guards and Deterrents

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Methods Utilized for the Prevention of Wood Structure Fires Caused by Leakage Currents

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