Dow ENDURANCE™ HFDK-9253 EHV

About
DOW ENDURANCE™ HFDK-9253 EHV is a long-life, unfilled, crosslinkable, low density polyethylene insulation compound of extreme cleanliness developed especially for the insulation of power cables that employ high electrical stresses. DOW ENDURANCE HFDK-9253 EHV has been designed for cable production processes on horizontal vulcanization lines and for cables with thick insulation manufactured on standard catenary vulcanization lines. DOW ENDURANCE HFDK-9253 EHV has been designed with a non-migrating stabilizer providing high thermal stability, long term stability and optimum crosslinking behavior. It has an enhanced degree of scorch retardance for fine mesh filtering and long production run lengths during cable manufacture. DOW ENDURANCE HFDK-9253 EHV is recommended especially for the insulation of extra high voltage power transmission cables rated above 230 kV. Specifications Cables insulated with DOW ENDURANCE HFDK-9253 EHV, using sound commercial manufacturing practice, would be expected to meet the latest editions of the following specifications and regulations: IEC 62067 AEIC CS9 ANSI/ICEA: S-108-720 GB/T 22078&&

About

DOW ENDURANCE™ HFDK-9253 EHV is a long-life, unfilled, crosslinkable, low density polyethylene insulation compound of extreme cleanliness developed especially for the insulation of power cables that employ high electrical stresses. DOW ENDURANCE HFDK-9253 EHV has been designed for cable production processes on horizontal vulcanization lines and for cables with thick insulation manufactured on standard catenary vulcanization lines. DOW ENDURANCE HFDK-9253 EHV has been designed with a non-migrating stabilizer providing high thermal stability, long term stability and optimum crosslinking behavior. It has an enhanced degree of scorch retardance for fine mesh filtering and long production run lengths during cable manufacture. DOW ENDURANCE HFDK-9253 EHV is recommended especially for the insulation of extra high voltage power transmission cables rated above 230 kV. Specifications Cables insulated with DOW ENDURANCE HFDK-9253 EHV, using sound commercial manufacturing practice, would be expected to meet the latest editions of the following specifications and regulations: IEC 62067 AEIC CS9 ANSI/ICEA: S-108-720 GB/T 22078&&

Product Description
Supplier	DOW
Generic	XLPE
Material Status	Commercial: Active
Availabilitys	Africa & Middle East ,North America,Latin America,Asia Pacific,Europe

Technical Data
PHYSICAL	Nominal value	Unit	Test method
Density	0.920	g/cm³	ASTM D792
humidity	< 200	ppm	Internal Method

MECHANICAL	Nominal value	Unit	Test method
tensile strength	20.0	MPa	ASTM D638
Tensile strain
fracture	500	%	ASTM D638

Aging performance	Nominal value	Unit	Test method
The rate of change in tensile strength
150℃，168 hr	< 25	%	ASTM D638

THERMAL	Nominal value	Unit	Test method
thermosetting			IEC 60811-2-1
Under load: 200 ℃	< 100	%	IEC 60811-2-1
Elongation without load: 200 ℃	< 5.0	%	IEC 60811-2-1

Electrical performance	Nominal value	Unit	Test method
Volume resistivity
23℃	> 1.0E+16	ohms·cm	ASTM D257
Dielectric strength			ASTM D149
3.18 mm	> 30	kV/mm	ASTM D149
3.18 mm	> 23	kV/mm	ASTM D149
3.18 mm	> 39	kV/mm	ASTM D149
Dielectric constant
23℃	2.30		ASTM D150
Dissipation factor
23℃	< 3.0E-4		ASTM D150

Notes
1. Typical properties: these are not to be construed as specifications.
2. Method A (Short-Time)
3. Method B (Step-by-Step)
4. Method C (Slow Rate-of-Rise)
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