tardograda mogwai induced subterranean insulation decomposition
TRANSCRIPT
Tardograda Mogwai Induced Subterranean Insulation Decomposition
Dr. Ambrose TurdickinUniversity of Pylmoth
April 1, 2014
University of Plymoth
Tardograda Mogwai
• First reported by the RAF during WW II in India
• Rapid growth of failures followed introduction of Styrene Butadiene Rubber in RAF magnetron based radar systems.
• Research strain collected in 1944
Photo Credit Dr. T. Staiano Metro Engineering Consulting Consortium Associates
Mogwai Consumption of Other Insulations
• WWII research correalted Mogwai consumption of SBR insulations
• Stufing and Poupmkin observed consumption of Neoprene and Lead in 1994
EPR XLPE PE Lead Neoprene SBR0
10
20
30
40
50
60
70
80
90
100
*
Connecting the Dots
• We know that Mogwai will consume many types of cable insulation
• Original behavior observed around high frequency cables
• What attracts them to low voltage cable?
Tardograda Mogwai and Cable
• Early studies showed Mogwai positive correlation between consumption and frequency, Mayflower et al.
• Large networks have resonant frequencies of less than .001 Hz
Frequency Response
• Mayflower focused on aircraft issues
• Above 400 Hz• New research
examined response down to DC (0 Hz) to understand impact on HVDC Systems
Frequency (log)
Cons
umpti
on
1.21 GHz1 uHz
The Termite Connection
SBR Insulation Cellulose Wood Products
Mogwai Moultus0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
80.00%
90.00%
100.00%• Cellulose is the mainstay of the Isoptera
• Evolved around decomposition around wood
• Mogwai moltus is nearly 90% cellulose
