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Fall 2005 - Presentations
Check this page periodically to learn about the Presentations
scheduled for the Fall meeting.
Please Note: This is a only a listing of the
presentations and
UNLESS NOTED, DOES NOT IMPLY THE ORDER IN WHICH THEY WILL BE
PRESENTED.
- Special Activities
-
WG A11W - Chairman Joe Snow has posted a
To-Do List for the WG as it updates
IEEE 1142:
Draft Guide for the Selection, Testing Application and
Installation of Cables Having Radial Moisture Barriers and/or Longitudinal
Water Blocking.
The Guide is posted
on the ICC Download site (see the link in the menu panel to the left). Joe
requests your comments be sent to him at
joe.snow@snowbuilding.com by
October 25th.
-
WG B6 - Chairman John Dupont has posted the latest draft of
IEEE 1299, IEEE Guide for the Connection of Surge Arresters to Protect
Insulated, Shielded Electric Power Cable Systems
on the ICC Download site (see the link in the menu panel to the left).
He's also posted new figures and the agenda for the Scottsdale
meeting. If you're coming to the WG
meeting, please print and bring your own copy of the documents.
- WG D15W - Chairman John Merando has posted draft 9
and comments from the recent ballot on the ICC Download site (see the link in the menu panel to the left). John
requests that you review the draft and the ballot comments before the
meeting. If you're coming to the WG
meeting, please print and bring your own copy of the documents.
- Opening Session
-
Mini-Expo Vendors
-
3M Electrical Products "Reliable electrical solutions for
construction and maintenance, industrial and utility applications, plus a
wide range of innovative products for OEM component manufacturers."
Contact Mary Jo Kilburn at
mjkilburn@mm.com for further information.
-
T&B Elastimold "A recognized leader in loadbreak separable
connectors, splices and cable terminators, providing the widest variety of
superior cable accessories worldwide." Contact Dave Britton at
dwbritton@aol.com for further
information.
-
IMCORP
"A provider of medium and high
voltage cable diagnostic equipment and testing services. With a proven track
record over many thousands of miles of cable, IMCORP’s marriage of high
technology and field verified methodology, combined with condition based
maintenance, has demonstrated tremendous capital
expenditure savings while improving overall cable system reliability".
Contact Ben Lanz at
ben.lanz@imcorptech.com
for further information
-
Caldwell Marine
International "A Marine Construction Contractor specializing in
Submarine Utilities, Submarine Cables, Pipeline Construction, Outfall
Construction as well as General Marine Construction."
- Subcommittee A
- Cable Construction and Design - Tuesday, November 1st, 8:00 am - 12:15 pm
- 8:00 - 8:15 am - Subcommittee Business:
Announcements
Serge Pelissou Hydro-Québec (IREQ) - Chair and John Smith, III,
General Cable – Vice-Chair
- 8:15 - 8:35 am – Current Measurements for Conduction
Analysis in Solid Insulating Polymers
J. Matallana, P. Mirebeau and H. Janah, Nexans, J.C. Filippini,
LEMD-CNRS / IRLAB
Abstract: Conduction currents measurements are widely used by high voltage
cable manufacturers to reach some parameters of insulating materials in
close relationship with their ability to withstand properly and reliably
service stresses. Most often, measurement techniques provided by
international standards [1] are shown to be unsatisfactory to get relevant
information regarding actual features of the insulating material with
respect to the aimed application. Therefore, specific tools have been
developed, assessed and validated. The first step toward understanding of
high field conduction properties is to derive resistivity from conduction
currents as a function of applied field and temperature in steady state
conditions - assuming the field across the sample to be uniform - by means
of a suitable high voltage experimental arrangement. Up to now, there is no
getting away from such an information to reach the empiric field and
temperature dependent exponential and/or power resistivity laws involved in
the calculation of the resistive electric field within the insulation of a
HVDC cable under loaded conditions [2]. Recently, an innovative method, the
Alternate Polarization Current (APC), has been introduced [3]. It consists
in recording the transient current flowing during successive applications,
on the sample, of alternate positive and negative steps of low applied
field, and averaging the data over a number of cycles. The low magnitude of
the field prevents injection processes and electrostatic constriction to
take place, hence favors a rather early pseudo-equilibrium. Whereas the
conventional technique measures the current after a preset polarization time
under a unique voltage step, hence in a more or less unsteady state leading
to scattered results, and may involve current injected at the sample edge
where the field is enhanced, the APC technique based on a dynamical
equilibrium gives such reproducible results that it has been previously
adopted as a Standard for the characterization of insulating liquids [4]
with the so-called “Alternate Square Wave method”. In its first part, the
paper describes the present state of the used measurement techniques with
their required instrumentation. Then, current vs. voltage characteristics
obtained with several polymeric insulators, using various poling stresses,
times and temperatures are presented. Results obtained under fields smaller
than 105 V/m and under service fields 2 orders of magnitude higher are
expected to open the way to physical interpretation. To sum up, a critical
discussion of the APC technique for conductivity measurements on polymeric
insulation with respect to conventional high field methods will be outlined.
- References
- [1] IEC 60093 “Methods of test for volume resistivity
and surface resistivity of solid insulating materials”, Second edition,
1980.
- [2] B. Aladenize, R. Coelho, J.C. Assier, H. Janah,
P. Mirebeau, “Field distribution in HVDC cables: dependence on
insulating materials”, Proceedings of JICABLE 99 Conference, Versailles,
France, 1999.
- [3] J.C. Filippini, R. Tobazéon, C. Marteau, R.
Coelho, J. Matallana, H. Janah, “The Alternate Polarization Current
Method for Conduction Analysis in Polymers”, Proceedings of ICSD’04
Conference, Toulouse, France, 2004.
- [4] IEC 61620 “Insulating liquids – Determination of
the dielectric dissipation factor by measurement of the conductance and
capacitance – Test method”, First edition, 1998-11.
- 8:35 - 8:55 am – Accelerated Aging of Rejuvenated
Cables – Part II
Glen J. Bertini, Novinium Inc.
Abstract: This paper provides part II of a framework for the prediction of
the effective life extension of cables treated with rejuvenating chemicals
under accelerated aging conditions. Utilizing the principles of molecular
thermodynamics and a cable’s soil regime, soil thermal conductivity, and
load profile, it is possible to make accurate estimations of life extension
for legacy technologies and for new advanced technologies. Part II of this
two-part paper introduces an improved model which includes and integrates
all of the refinements introduced by Part I, plus includes: all cable
layers; not just the insulation, dynamics of fluctuating temperature,
molecular thermodynamics of component inter-actions, and reaction kinetics.
- 8:55 - 9:15 am – Case Study: Rejuvenation Fluid
Injection Results from Duke Power’s Little Rock Retail Tap Line, a 115 kV
XLPE, Buried Transmission Circuit
William Stagi, UtilX Corp, Frederick E. Kimsey, Duke Power
Abstract: In 1994, a Duke Power Company, 115 kV class, XLPE underground
transmission cable failed. Failure analysis performed by Cable Technology
Laboratories noted a low ac breakdown strength and suggested a high
insulation moisture content as a likely reason. Duke Power opted to treat
the remaining (un-failed) cables using CableCURE® life-extension, fluid
injection technology. The treated cables remained in service for an
additional 10 years after injection. Ultimately a termination failure led to
the decision to remove them from service. This allowed an unprecedented
opportunity to evaluate the responsiveness of solid dielectric, transmission
cables to fluid treatment. Until now most of the 60,000,000 feet of injected
cable has been in the distribution class of cables. The results of that
evaluation, published in this paper, demonstrate treatment effectiveness on
par with results obtained on distribution class cables.
- 9:15 - 9:45 am – Break
- 9:45 - 10:05 am – Modeling of Material Toughness
D. Wright, K. Yang, B. Chaudhary, The Dow Chemical Company
Abstract: A finite element computer model was used to simulate the influence
of material properties on the toughness of a cable jacket. The key material
properties used in the model and the predicted stress distribution within
the cable jacket are presented. Finally, the model predictions were compared
to actual cable tests.
- 10:05 - 10:25 – Improved Productivity in HV Cable
Manufacturing
Dominic Kung, Eric Marsden and Nigel Hampton, Borealis
Compounds LLC
Abstract: Degassing is an important process for HV and EHV cables because it
removes the crosslinking by-products (e.g. methane) that would result in a
number of problems if left within the XLPE matrix. The time required to
degas cable primarily depends on the initial level of by-products.
Traditionally, the process has been accelerated by increasing the
temperature, which speeds up degassing but also uses significant amounts of
energy and can cause damage to the cable core. To address this issue we
developed an XLPE compound which reduces the degassing requirements and thus
can significantly improve cable productivity. The scale of productivity
improvements that can accrue from the increased throughput offered by this
compound depends on cable design, size, and manufacturing principles.
- 10:25 - 10:45 – High Temperature Performance of MV
Materials
P. Caronia, A. Mendelsohn, The Dow Chemical Company
Abstract: Over the years, crosslinked solid dielectric cables have
demonstrated excellent field performance under current industry operating
temperatures of 90°C normal and 130°C overload. More recently a higher
temperature rating of 105°C normal and 140°C overload has become accepted
for both TR-XLPE and EPR insulated cables. We will review the results
obtained in key high temperature mechanical and electrical tests with both
TR-XLPE and EPR insulated cables that supports the 105°C normal and 140°C
overload temperature rating for these cable materials.
- 10:45 - 10:50 – Meeting Adjourn
Serge Pélissou, John Smith III
- Subcommittee B
- Accessories - Monday, October 31st, 9:15 am - 12:30 pm
- Subcommittee Business
Bob Gear
and Tom Champion
- Panel Session: Field Data Obtained from PD
Measurements on Cable Accessories
Chairman - Harry Orton
Panelists:
- Dr. Ed Gulski, TUDelft
- Dr.-Ing Frank Petzold, SEBA Dynatronic GmbH
- Professor Eberhard Lemke, Lemke Diagnostics
- Ben Lanz, ImCorp
- Bruce Bernstein, DTE Energy
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