Rubber insulated power cable

Rubber insulated power cable introduction

Rubber insulated power cable insulation layer is SBR rubber or butyl rubber. 6-35kV rubber insulated cables, wires surface of semi-conductive shielding layer, an insulating layer surface with semi-conductive material and a metal shield combination. Multi-core cables insulated cores twisted, the use of corrosion resistant fiber fill and pack with blanket fiberglass tape or adhesive tape. Rubber cable jacket is generally poly vinyl grip sheath or neoprene rubber sheath.
Rubber insulated cable insulation softness best and the conductor strands root number slightly more than other types of cable, so cable laying Easy installation, suitable for larger gap and bend radius smaller occasions. It can be used for fixed laying power lines can also be used to move periodically laid lines. But when the rubber insulation will quickly damage the oil encountered in high voltage stress cracks susceptible to corona effect, so this cable is generally used At 10kV and below voltage level.

Rubber insulated power cable features

1. Generally buried in the soil or laying indoors, trenches, tunnels, insulation distance between lines is small, no tower, small footprint, the surface area of almost no space.
2. Influenced by climatic conditions and the surrounding environmental impact, transport, stable performance, high reliability.
3. With the high pressure, high-capacity development more favorable conditions, such as temperature, superconducting power cables.
4. Distributed capacitance larger.
5. Less maintenance.
6. Possibility of a small electric shock.

Rubber insulated power cable application

As with rubber insulation and sheath of wires, cables.
Usually the metal conductor, the shield, rubber insulation and sheath components.
By purpose are power cables, control and signal cables, marine cables, aviation cables, mining cables, mounting electrical wiring.
Insulation and sheath made of natural rubber, styrene-butadiene rubber, ethylene-propylene rubber production, in addition to meeting insulating properties and mechanical properties, the requirements of anti-aging, wear, some products require oil resistance, flame retardant.
Wires, cables for general use extrusion, continuous hot air vulcanization. Products are used in all walks of life.

Rubber insulated cables with insulating rubber as the insulating materialmay be folded repeatedly bent inward but with poor capability against destructive forces, generally used in rated voltage less than 10KV, using the hanging laying rarely for underground laying. For traffic, cranes and other mobile machinery supply cable more.

Rubber insulated power cable standards

GB 5013-1997 rated voltage 450/750V rubber insulated cables

GB7594.8-1987 wire and cable Rubber insulation and sheath

GB / T 12706-2002 (equivalent with IEC502), flame retardant cable, fire-resistant cable is also in line IE332-3, IEC331, may also produce technical requirements required by the user.

Rubber insulated power cable construction

Rubber insulated power cable technical parameter

65℃ Ampere capacity

Main Core Cross-section area（mm²)	YZ、YZW、YHZ（A）								YQ、YQW、YHQ（A）
	2 Core				3Cores、4Cores				2 Cores	3 Cores
	20℃	30℃	35℃	40℃	25℃	30℃	35℃	40℃	25℃	25℃
0.75	12	11	10	9	9	8	7	7	11	9
0.75	14	13	12	11	11	10	9	8	14	12
1.0	17	15	14	13	13	12	11	10	-	-
1.5	21	19	18	16	18	16	15	14	-	-
2.0	26	24	22	20	22	20	19	17	-	-
2.5	30	28	25	23	25	23	21	19	-	-
4	41	38	35	32	36	32	30	27	-	-
6	53	49	45	41	45	42	38	35	-	-

Continuous ampere capacity

Model	YQ YQW YZ YZW YC YCW
Rated Voltage（KV）	0.45/0.75
Cores	1			2			3			4			5
Conductor Operating temperature（°C）	65
Ambient temperature（°C）	30	35	40	30	35	40	30	35	40	30	35	40	30	35	40
Nominal Cross-section area（mm2）	Copper conductor laying on ground
1.5	24	22	20	19	17	16	17	15	14	15	14	13	14	13	12
2.5	32	29	27	27	25	23	22	21	19	21	20	18	19	17	16
4	42	39	36	35	33	30	31	28	26	28	26	24	26	24	22
6	55	51	47	46	43	39	39	36	33	35	33	30	33	31	28
10	78	72	66	65	60	55	55	51	47	51	47	43	47	44	40
16	103	95	87	86	80	73	73	68	62	66	61	56	63	58	53
25	136	125	115	113	105	96	98	90	83	84	77	71	83	76	70
35	165	153	140	136	125	115	118	109	100	116	107	98	-	-	-
50	212	196	180	177	164	150	153	142	130	136	125	115	-	-	-
70	260	240	220	218	202	185	189	174	160	165	153	140	-	-	-
95	313	289	265	260	240	220	224	207	190	201	185	170	-	-	-
120	366	338	310	-	-	-	266	245	225	230	213	195	-	-	-
150	425	392	360	-	-	-	301	278	255	266	245	225	-	-	-
185	478	441	405	-	-	-	-	-	-	-	-	-	-	-	-
240	573	529	485	-	-	-	-	-	-	-	--	-	-	-	-