OEM Custom 35kv Fireproof Power Cable for Substation Automation Cable Splice

Product Description

High Voltage and extra High Voltage, a speciality of the HV-team

Development, consultancy, planning and design, cost-optimization, production, logistics, installation and service. With this all-round support the DONGFENG cables HV-team will be at our customer's service in regard of the products high voltage and extra high voltage cables and accessories. Optimized internal communication systems, specialized divisions and intensively trained team members are the power behind the customer-orientated installation solutions. With competence and know-how the DONGFENG cables "Power Team" provides secure and reliable power supply wherever fully developed high-voltage power transmission is needed
The DONGFENG cables HV-team has gained overall international experience. As the HV-team feels bound to always deliver the optimal tailor-made system solutions, no two installations are alike. And while doing so, security and economy always come first.

The Cables
Design and manufacture

A wide variety of high voltage cable designs is offered by DONGFENG cables to provide most economic solutions. Various types of conductors, insulation, metallic screening and sheathing, corrosion protective layers etc. are available.

Conductors

The cable conductors can be made of copper or aluminium. The choice is a matter of customer's preference or current carrying capacity. Large size solid conductors are made of aluminium.

Available conductor constructions:

(1)round solid conductors up to 2000 mm2 (RE)
(2)circular stranded compacted conductors up to 1200 mm2 (RM)
(3)circular conductors with shaped wires up to 2000 mm2 (RM, Keystone conductors)
(4)segmental conductors up to 2500 mm2 (RMS, Milliken conductors)
(5)oval shaped stranded compacted conductors up to 800 mm2 for external gas pressure cables (OM)
The conductors are manufactured to meet the requirements of the relevant national and international standards. For special applications the conductors can be made watertight.

Insulation

The insulations for low pressure oil filled cables and for conventional pipe type cables are lapped from high quality insulating papers. Subsequently the paper insulated cable cores are impregnated in appropriate vessels with low viscous oil or high viscous compound.
For manufacture of XLPE insulated high voltage cables, DONGFENG cables disposes of four extrusion lines. Highest quality standards together with latest process control equipment and combined with decades of experience ensure manufacture of cables meeting the highest requirements and enabling development of most advanced power cable systems.

Metallic Covering

Conventional paper insulated cables require a pressure proof and watertight metallic enclosure, acting also as metallic screen. At DONGFENG cables both, extruded lead sheath as well as the aluminium sheath can be applied. These types of metal sheaths are, of course, also used on XLPE insulated cables. While the lead sheath leads to smaller dimensions, the aluminium sheath provides high short circuit current carrying capability and lower weight.
As the XLPE insulated cables do not require an internal overpressure, they are usually equipped with a copper wire screen. For radial moisture barrier a coated aluminium foil is longitudinally applied. The combination with the polyethylene oversheath is called aluminium polyethylene laminated (APL) sheath. This solution provides high short circuit capability and watertightness combined with lowest weight and smallest dimensions.
A combination of the copper wire screen with a metal sheath is also possible. For all XLPE insulated high voltage cables, the space between cable core and water barrier is made longitudinally watertight.

Oversheath

An extruded polyethylene sheath is provided as the standard solution. With respect to its excellent mechanical strength it is the optimum for buried cables. If required, a conductive layer can be provided on the outside. For special applications different
sheathing material may be used, optimized for the purpose.

Cabling and Armouring

For the conventional pipe type cables as well as for the City Cable, laying-up of the three cores and provision of the strong steel armour is an essential feature. Therefore, DONGFENG cables disposes also of the appropriate machinery to carry out these production Steps.

Specification

No. of cores (mm2)	Continuous current-carrying capacity (A)				Fault current carrying capacity for 1 second
	In air		In ground
	Solid bond	Solid bond	Solid bond	Solid bond	Cond. (kA)	Scr. (kA)
1x150	466	489	359	341	21.5	16.5
1x185	485	505	420	405	26.5	16.5
1x240	565	590	480	465	34.3	16.5
1x300	645	685	550	535	42.9	16.5
1x400	745	775	645	610	57.2	16.5
1x500	845	895	700	690	71.5	16.5
1x630	970	1020	790	780	90.1	16.5
1x800	1100	1165	880	870	114	16.5
1x1000	1280	1350	100	980	143	16.5
1x1200	1400	1480	1080	1055	172	16.5
1x1600	1644	1726	1177	1118	229	16.5
1x2000	1831	1922	1249	1186	286	16.5
1x2500	2428	2549	1447	1374	357.5	16.5

No. of cores (mm2)	Conductor diameter (mm)	Insulation thickness (mm)	Diameter over insluation (mm)	Approx. screen area (mm)	Nominal thickness of APL/HDPE sheath (mm)	Overall diameter appr. (mm)	Cable mass (kg/km)	Radius of bend during installation (mm)	Radius of bend set in position (mm)
1x150	14.2	18	53.2	116.3	0.25/3.0	67.2	5506	1344	1008
1x185	15.9	18	56.3	116.3	0.25/3.1	70.9	6089	1418	1064
1x240	18.1	18	58.3	116.3	0.25/3.1	73.0	6739	1460	1095
1x300	20.3	18	60.7	116.3	0.25/3.2	75.6	7498	1512	1134
1x400	23.0	18	63.5	116.3	0.25/3.3	78.6	8489	1572	1179
1x500	26.0	18	66.7	116.3	0.25/3.4	82.0	9694	1640	1230
1x630	30.0	18	70.2	116.3	0.25/3.5	85.7	11312	1714	1286
1x800	34.2	18	75.2	116.3	0.25/3.6	90.8	13640	1816	1362
1x1000	39.5	18	79.3	116.3	0.25/3.8	95.3	15637	1906	1430
1x1200	43.5	18	85.5	116.3	0.25/3.9	101.8	17910	2036	1527
1x1600	49.2	18	90.0	116.3	0.25/4.1	106.2	22052	2124	1593
1x2000	55.2	18	96.0	116.3	0.25/4.2	112.6	26186	2252	1689
1x2500	61.5	18	102.3	116.3	0.25/4.5	119.3	31251	2386	1790