Home > High Voltage Power Cables > 37/66kV XLPE insulated Copper wire shielded HDPE sheathed cable

37/66kV XLPE insulated Copper wire shielded HDPE sheathed cable

Application

High voltage power cables are designed for transmitting electrical power at voltages above 35kV. These cables are crucial for power transmission and distribution networks, connecting power plants to substations and distributing electricity across vast distances.

Construction

Conductor:Copper Or Aluminum
Conductor Screen:·Semi-conductive tape+Semi-conductive Compound
Insulation:XLPE (Cross-linked Polyethylene)
Insulation Screen:Semi-conductive Compound
Wrapping:Semi-conductive water blocking tape
Metallic Screen:Copper wires
Tape:Aluminum plastic composite
Sheath:HDPE (High Density Polyethylene)

Main Characteristics

Operating Temperature: -30°C to +90°C
Short Circuit Temperature: +250°C
Overload Temperature: +130°C (100h per year maximum)
Minimum Installation Temperature: -20°C

Specification

IEC 60840,Power cables with extruded insulation and their accessoriesfor rated voltages above 30 kV(U=36 kV)up to 150 kV(U=170 kV).

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Conductor		Nominal insulation thickness	Insulation dia.	Copper-wire screen cross section	Nominal sheath thickness	Overall dia.	Approx.mass		Max.D.C.Resistance of Conductor at 20℃		Capacitance at 20℃
Nominal cross	Diameter	Nominal insulation thickness	Insulation dia.	Copper-wire screen cross section	Nominal sheath thickness	Overall dia.	CU	AL	CU	AL	Capacitance at 20℃
mm²	mm	mm	mm	mm	mm	mm	kg/km		Ω/km		μF/km
1×95	11.6	13	40.4	50	4	57.3	3467	2879	0.193	0.32	0.117
1×120	13	13	41.8	50	4	58.7	3780	3038	0.153	0.253	0.125
1×150	14.4	13	43.2	50	4	60.1	4138	3210	0.124	0.206	0.133
1×185	16.2	13	45	50	4	61.9	4565	3421	0.0991	0.164	0.142
1×240	18.4	12	45.2	50	4	62.1	4982	3522	0.0754	0.125	0.164
1×300	20.6	12	47.4	50	4	64.3	5669	3825	0.0601	0.1	0.177
1×400	23.4	12	50.2	50	4	67.1	6589	4226	0.047	0.0778	0.197
1×500	26.6	12	53.4	50	4	70.3	7747	4715	0.0336	0.0605	0.218
1×630	30	12	56.8	50	4	73.7	9175	5296	0.0283	0.0469	0.237
1×800	34	12	60.8	50	4	77.7	10970	6014	0.0221	0.0367	0.247
1×800	35	12	63.1	50	4	80	11220	6264	0.0221	0.0367	0.268
1×1000	39	12	67.1	50	4.5	85	13422	7204	0.0176	0.0291	0.29
1×1200	42.6	12	70.7	50	5	89.6	15442	8080	0.0151	0.0247	0.307
1×1400	45.2	12	73.3	50	5	92.2	17397	8797	0.0129	0.0212	0.324
1×1600	48.5	12	76.6	50	5	95.5	19310	9535	0.0113	0.0186	0.339
1×1800	50.8	12	78.9	50	4.5	96.8	21273	10137	0.0101	0.0165	0.354
1×2000	54	12	82.1	50	5	101	23418	11044	0.009	0.0145	0.372
1×2200	57.4	12	85.5	50	5	104.4	25427	11815	0.0083	0.0135	0.391
1×2500	61.2	12	89.3	50	5	108.2	28352	12884	0.0072	0.0127	0.411

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FAQ

What is the length tolerance for cables?

Flame Retardant Cables VS Fire Resistant Cables?

How Do Water-Blocking Cables Work?

How long is the validity period of cold shrink cable accessories?

Longitudinal Water Blocking vs. Lateral Water Blocking?

Why do cable prices vary significantly among suppliers within the same region?

Cable prices vary due to differences in supplier strategies, competition, raw materials, and production processes, as well as after-sales services, including installation, equipment, and ongoing support.

What is the length tolerance for cables?

The tolerance for the power cable is 0 to +0.5%. For the bare conductor, the tolerance is ±5%.

What are the benefits of EPR material?

EPR is widely used as an insulation material for electric cables due to its high dielectric strength, and it also serves as a sheathing material with excellent ozone and weathering resistance. EPR has a wide thermal range, typically spanning from -55°C to 150°C. Unlike other organic rubbers, there is no need to tin the copper conductor to prevent deterioration of the rubber.

What is the purpose of a metallic shield in MV and HV cables?

Medium and high voltage power cables, typically those in circuits exceeding 2kV, usually feature a shield layer made of copper or aluminum tape. Similar to their use in low voltage cables, metallic wires and tapes are employed to prevent electromagnetic interference. These shields effectively neutralize or significantly diminish the field currents surrounding the conductor or core. The capacitive and inductive charging currents induced under normal operating conditions are subsequently grounded by the metallic screen.

Longitudinal Water Blocking vs. Lateral Water Blocking?

A longitudinally water blocking cable is designed with a barrier to prevent the spread of moisture along its length. Longitudinal water blocking stops water from migrating along the cable's core, typically between the conductor strands, insulation layers, or metallic screens. Lateral water blocking ensures that water cannot penetrate the cable in the event that the sheathing is pierced or damaged. Radial water blocking prevents water from penetrating the cable's outer sheath or insulation layers, thereby stopping it from entering the cable structure entirely. Longitudinal water blocking can be achieved through various methods, including the application of water-blocking tapes and powders. These are frequently located on either side of a metallic screen and conductor. Lateral water blocking is typically accomplished by applying a layer of aluminum/polyester tape to the underside of the outer sheath.