220KV Power Cable

220kV XLPE EHV cable for grid backbones island interconnections. Corona suppression water ingress resistance.

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Application

220kV XLPE extra-high voltage (EHV) cable for mainland grid backbones, island interconnections (including submarine sections), underground urban feeders, and tunnel installations. Conductor max continuous 90°C, max short-circuit 250°C. Cross-section up to 2500mm². IEC 60840/IEC 62067 compliant.

Core Strengths

EHV systems risk partial discharge failures without proper design. Our polymeric XLPE system suppresses corona, resists water ingress, and ensures long-term reliability for cross-sea and backbone projects. ISO/CE certified.

Standard

GB 11017， IEC60840

Construction

☉〉 Conductor: Stranded copper (class 2)

☉〉 Conductor screen: Semiconductive layer

☉〉 Insulation: XLPE (cross-linked polyethylene)

☉〉 Insulation screen: Semiconductive layer

☉〉 Semi-conductive water-blocking tape

☉〉 Copper wire screen

☉〉 Water-blocking tape

☉〉 Corrugated aluminum sheath (seamless, radial water barrier)

☉〉 Outer sheath with conductive layer (HDPE or PVC)

Features

☉〉 Rated voltage: 220kV (EHV transmission, up to 500kV system capability)

☉〉 XLPE insulation – 90°C continuous, 250°C short‑circuit

☉〉 Corrugated aluminum sheath – extreme radial water tightness, mechanical protection, bending flexibility

☉〉 Copper wire screen – uniform field distribution, corona suppression, fault return path

☉〉 Dual water‑blocking tapes – prevent longitudinal moisture ingress

☉〉 Outer sheath with conductive layer – anti‑corrosion, suitable for direct burial or tunnel

☉〉 Ideal for grid backbone, island interconnection, submarine sections, urban underground feeders

☉〉 100% factory tested to IEC 60840 / IEC 62067

Product Data Sheet

220KV Power Cable
Rated voltage	Conductor size	Approx. Conductor dia.	XLPE Insulation thickness	Electric Capacity	Inductance		Loss of insulation	Max. D.C. Resistance
Rated voltage	Conductor size	Approx. Conductor dia.	XLPE Insulation thickness	Electric Capacity	Parallel laying	Trefoil laying	Loss of insulation	Cu	Al
KV	mm2	mm	mm	pf/m	mh/km	mh/km	w/m	Ω/km
220	240	18.4	27	110	0.895	0.543	0.559	0.0754	0.125
	300	20.6	27	117	0.873	0.524	0.591	0.0601	0.1
	400	23.5	27	125	0.846	0.503	0.633	0.047	0.0778
	500	26.6	27	134	0.822	0.484	0.678	0.0336	0.0605
	630	30.25	27	144	0.796	0.464	0.729	0.0283	0.0469
	800	34.23	27	155	0.771	0.446	0.785	0.0221	0.0367
	1000	41.4	27	180	0.733	0.423	0.912	0.0176	0.0291
	1200	45.28	27	190	0.715	0.411	0.965	0.0151	0.0247
	1400	48.2	27	198	0.703	0.403	1.004	0.0123	0.0202
	1600	50.41	27	204	0.694	0.397	1.034	0.0108	0.0177
	1800	53.35	27	212	0.682	0.39	1.074	0.0096	0.0157
	2000	57	27	222	0.669	0.382	1.123	0.0086	0.0141

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