Dow Electrical & TelecommunicationsEnhanced Performance

MV Cable Insulation

What does DOW ENDURANCE™ HFDC 4202 EC do for utilities?

Life extension

Enhanced reliability / better asset utilization Ease of installation

Optimized costs, consistent installation Significantly Lower (~50%) water tree growth rate

Longevity, lower probability of failures Higher quality cables

Manufacturing consistency MV 105 C Rating for the material

Option for higher ampacity, when needed

How do we create the value?

Critical performance features for enhanced cable life…..

Higher electrical breakdown strength

Minimize electrical risks …water treeing in particular…

Improved / consistent cable installation

Eliminate accessory related risks

Improved cable quality Robust, consistent manufacturing that minimizes insulation related stresses due to fabrication process

Technology of DOW ENDURANCE™ HFDC 4202 EC

Same proven “Tree-retardant” additive technology used in 4202 for nearly 30 years.

Produced in totally integrated, state-of-the art facility − Feedstock to finished compound− Ongoing investments in continuous improvement

Extended cable life(enhanced formulation technology)

Improved ease of installation(reduced insulation shield stripping force)

Enhanced quality cable manufacturing(more robust processing)

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Supporting Data

Electrical Data

Mechanical Data

Processing Data

Electrical Property Validation

Laboratory Plaque Data Water Tree Resistance Dissipation Factor ACBD Retention

Cable Data ACLT Results MV105C

Water Tree Size and Shape Changed with HFDC-4202 EC

ASTM D6097-97 Water Tree Test ASTM D6097-97 Water Tree Test Water Tree Retardance

4201 XLPE

B4202 TR-XLPE

C4202 TR-XLPE

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XLPE TR XLPE C4202

Wat

er T

ree

Len

gth

(m

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Water Tree ComparisonASTM D6037; 30 day Aging

All 80x Magnification

Enhanced Wet Electrical Test Data

Enhanced Dow TR-XLPE – HFDC-4202 EC – demonstrates significant improvement over current commercial product

Actual Performance

DOW CONFIDENTIAL – Do Not Share Without Permission

HFDC 4202 ACLT Performance

ACLT Testing under “4,4” Conditions HFDB-4202 population at 1000 days aging - 0% remain Prototype HFDC-4202 at 1050 days aging - 53% remain Pilot plant HFDC-4202 at 830 days aging - 92% remain

Production Plant HFDC-4202• No failures out to 630 days• Aging continues…

C4202 demonstrating improved wet cable life

over B4202

C4202 demonstrating improved wet cable life

over B42029

DOW CONFIDENTIAL – Do Not Share Without Permission 10Testing on 1/0 15 kV cables

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B4202/0693 C4202/0693 B4202/0693LS C4202/0693LS

Stri

p Fo

rce,

lb/0

.5"

Inital and Predicted after ICEA Cyclic Aging

Initial Thermally Conditioned

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Stri

p Fo

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Strip Force Stability vs Time Aging at 100C

B4202/0693 C4202/0693 B4202/0693LS C4202/0693LS

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Stri

p Fo

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Conditioning Temp (deg C) for 4hrs

Strip Force against Conditioning Temperature

B4202/0693 C4202/0693 B4202/0693LS C4202/0693LS

permission

Reduced Strip Force System

Commercialization Timeline

Compound Production Trial 1Q10

Dow material qualification cable testing initiated => 4Q10

Cable manufacturers qualification initiated => Complete*

ICEA Qualifications completed =>

Commercially Available => NOW!

120day = Data available360day = Data Available

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*Southwire and Nexans have completed 120 AWTT testing

Volts / mil

HFDC - 4202 Qualification -Completed

Source-Nexans

ICEARequirement380 V/mil

Action Steps

We recommend utilities update their MV cable specifications to reflect the acceptance of DOW ENDURANCETM HFDC-4202 EC. Ask your cable manufacturer to provide cables with this insulation material.

Dow welcomes dialog on specific steps to make this happen

Dow also would like to understand your experience with the new compound: Do your line technicians like the lower strip capability? Do they think this makes the installation easier? Does this capability increase the likelihood of higher quality

accessory installation? Are there any issues with cables made from the new compound?

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Summary

DOW ENDURANCE™ HFDC 4202 EC TR-XLPE:

Continues great tradition of high quality insulation compounds, based on proven experience and TR technology of the past 28 years

Confirms Dow’s commitment to continuous improvement and bringing value added solutions to the industry

Has enhanced electrical performance (projected longer life), higher water tree retardance, lower and consistent insulation shield strip force and robust cable manufacturing

Provides superior performance solutions for power delivery industry. With the ICEA qualifications complete, trial installations can move forward.

HFDC - 4202 Qualification Update

Volts / mil

HFDC - 4202 Qualification Update

ICEA Qualification Progress-120 Days

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Material CombinationsSource-averages of data from Nexans and Southwire ongoing cable qualifications

ICEA Qualification Progress-180 Days

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Material Combinations

Source-ongoing cable qualification by Southwire Company

AWTT Qualification Testing

ICEA Qualification Completion-360 Days

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Material CombinationsSource-completed cable qualification by Southwire Company

AWTT Qualification Testing

ICEA requirement380 v/mil