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Spacer Cable Technical Data for 3 Layer Compounds

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SPACER CABLE TECHNICAL DATA FOR 3 LAYER COMPOUNDS

The first layer data (inner layer) 35kV semi-conducting shield compound

	DESCRIPTION	UNIT	REQUIRED VALUE
1	Color		Black
2	Density (23℃)	g/cm3	1.11
3	Tensile strength before aging	Mpa	min 14
3	Elongation at break before aging	%	min 200
4	Performance after air oven aging
	Testing temperature	℃	135±2
	Testing time	hours	168
	Tensile strength variation before & after aging	%	15
	At-break-elongation variation before & after aging	%	-7.5
5	Hot set test(0.2MPa,200℃, 15min)
	Elongation under load	%	43
	Variation after cool	%	0
6	Volume resistivity at 20℃	Ω.cm	33
7	Volume resistivity at 90℃	Ω.cm	181
8	Volume resistivity at 90℃(volume resistivity at 90℃, after air oven aging (100℃*168hours))	Ω.cm	124

The second layer data (middle layer) 35kV XLPE, color natural (clear)

	DESCRIPTION	UNIT	REQUIRED VALUE
1	Color		Clear, natural
2	Density (23℃)	g/cm3	0.926
3	Tensile strength before aging	Mpa	min 23
3	Elongation at break before aging	%	min 500
4	Performance after air oven aging
	Testing temperature	℃	135±2
	Testing time	hours	168
	Tensile strength variation before & after aging	%	-9.3
	At-break-elongation variation before & after aging	%	-17
5	Hot set test(0.2MPa,200℃, 15min)
	Elongation under load	%	35
	Variation after cool	%	0
6	Dielectric loss factor, 20℃, 50Hz		0.0004
7	Dielectric coefficient, 20℃, 50Hz		2.1
8	Volume resistivity at 20℃	Ω.m	1.5 x 10¹³
9	Dielectric strength	MV/m	35

The third layer data (outer layer) 35kV XLPE, Gray, UV resistant, weather resistant

	DESCRIPTION	UNIT	REQUIRED VALUE
1	Color		Gray
2	Density (23℃)	g/cm3	0.926
3	Tensile strength before aging	Mpa	min 24.7
3	Elongation at break before aging	%	min 521
4	Performance after air oven aging
	Testing temperature	℃	135±2
	Testing time	hours	168
	Tensile strength variation before & after aging	%	-7
	At-break-elongation variation before & after aging	%	-5
5	Hot set test(0.2MPa,200℃, 15min)
	Elongation under load	%	33
	Variation after cool	%	0
6	Dielectric loss factor, 20℃, 50Hz		0.00005
7	Dielectric coefficient, 20℃, 50Hz		2.0
8	Volume resistivity at 20℃	Ω.m	1.4 x 10¹⁵
9	Dielectric strength	MV/m	35