Description

Technical Parameters

Certification

3.8/7.2Kv Aluminum 3C Medium Voltage Industrial Cable

Medium voltage industrial cable is lasting performance, Chemical-proof, and its ability to withstand short circuit conditions is an important indicator of its safety. Its design takes the impact of short-circuit current into consideration and it can withstand sudden high currents in a short period of time without being damaged. The cable can still protect equipment in the event of a short circuit and prevent further expansion of the fault.

Application

3.8/7.2kV aluminum 3 core medium voltage industrial cable is widely used in large-scale infrastructure and utility projects. Its 7.2kV rated voltage provides additional capacity margin compared to 6.6kV systems. It is suitable for regional distribution networks, medium-voltage feeders, and secondary substations supplying large facilities. Due to its aluminum conductors, this cable is lighter than copper wire, reducing structural loads in overhead lines, underground ducts, and long-distance installations. It is particularly advantageous in projects such as industrial parks, mining operations, and renewable energy integration (such as wind or solar farms), which require the deployment of large numbers of cables over long routes. The reduced weight also reduces handling and installation costs.

Feature

• Conductor: Stranded Compacted Circular aluminium conductor as per AS/NZS 1125

• Conductor Screen: Extruded Semi-conductive compound

• Insulation: XLPE

• Insulation Screen: Extruded Semi-conductive compound

• Longitudinal Water blocking: Water blocking tape above and below copper screen (Optional)

• Metallic Insulation Screen: Copper Wire Screen + helically applied copper tape

• binder tape/sheath over assembled cores

• Metallic Sheath: Lead Alloy (optional)

• Outer Sheath: Extruded Polyvinyl Chloride, Colour: Black

• Insect attack Protection: Polyamide Nylon (optional)

(Alternative Sheath: PVC + HDPE Outer Sheath or LSZH Outer sheath and parameters will change accordingly)

Certification

Medium voltage industrial cables are SAA certified, with certification numbers: SAA242046 and SAA250307. By directly entering the certification number on the SAA official website, you can confirm the legality and compliance of the cables. This transparency enhances supply chain reliability and eliminates uncertainty about the cables. Having a direct verification channel saves time and costs and ensures that high-quality certified products enter projects. As a manufacturer that prioritizes quality, compliance, and customer safety, Greater Wire is able to expand into new markets, undertake large-scale projects, and effectively compete with global competitors.

Package

sta power cable package

Factory

Greater Wire Manufacturer regularly formulates production and marketing strategies, and the company regularly conducts market research to help factories understand the latest industry trends and changes in customer demand. For example, with the development of the new energy industry, the market demand for special cables such as high-voltage and temperature-resistant cables has gradually increased. By capturing these market signals in a timely manner, factories can adjust their product lines and develop new products to meet market demand. Trend analysis also includes research on industry policies, raw material price fluctuations, and technological advances to help factories develop long-term strategic plans.

Case

Company cases

Partner

greater wire Partner

FAQ

Q: What is the 3.8/7.2kV voltage level?

A: The 3.8/7.2kV voltage level usually refers to the common rated voltage level in the medium voltage (MV) system. 3.8kV is the phase voltage (i.e. the voltage relative to the ground). 7.2kV is the line voltage (i.e. the phase-to-phase voltage), which is the highest working voltage of the cable.

Q: Are cables suitable for use at high altitudes?

A: Cables can be used in high altitudes, where the air is thin and the insulation is reduced. The insulation level of the air decreases with increasing altitude, so the insulation thickness of the cable may need to be thickened to prevent corona discharge and arcing problems. It is generally recommended to use cables with higher insulation grades for areas above 2000 meters. The temperature difference is large in high altitudes, and the cable needs to adapt to large temperature changes. Choosing heat-resistant materials or special weather-resistant sheaths can help extend the life of the cable. Ultraviolet rays are strong in high altitudes, and choosing anti-ultraviolet sheath materials can protect the cable. For high altitudes in humid environments, such as mountainous areas, cables with waterproof layers or moisture-proof shielding can be selected. During transportation, construction, and operation, the terrain in high altitudes is complex and the cable may be subjected to more mechanical stress. Strengthening the mechanical protection of the cable, such as the armor layer and wear layer, can improve its durability.

Q: How to maintain cables?

A: Cables can be used in high altitudes, where the air is thin and the insulation is reduced. The insulation level of the air decreases with increasing altitude, so the insulation thickness of the cable may need to be thickened to prevent corona discharge and arcing problems. It is generally recommended to use cables with higher insulation grades for areas above 2000 meters. The temperature difference is large in high altitudes, and the cable needs to adapt to large temperature changes. Choosing heat-resistant materials or special weather-resistant sheaths can help extend the life of the cable. Ultraviolet rays are strong in high altitudes, and choosing anti-ultraviolet sheath materials can protect the cable. For high altitudes in humid environments, such as mountainous areas, cables with waterproof layers or moisture-proof shielding can be selected. During transportation, construction and operation, the terrain in high altitudes is complex and the cable may be subjected to more mechanical stress. Strengthening the mechanical protection of the cable, such as armor layer and wear layer, can improve the durability of the cable.

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3C AL MV Cable

AL 3C MV Cable

No. of Cores	Core Cross sectional Area	Nominal Diameter
No. of Cores	Core Cross sectional Area	Under metallic screen	Under metallic screen	Overall
No.	mm2	mm	mm	mm
3	16	12.8	14.3	35.0
3	25	14.1	15.6	38.0
3	35	15.1	16.6	40.0
3	50	16.2	17.7	43.0
3	70	17.8	19.3	46.0
3	95	19.4	20.9	50.0
3	120	21	22.5	54.0
3	150	22.3	23.8	57.0
3	185	24	25.5	61.0
3	240	26.5	28.0	66.0
3	300	29.1	30.6	72.0
3	400	32.2	33.7	79.0
3	500	36	37.5	88.0

• Above mentioned parameters are based on 3k A/sec earth fault current capacity of copper screen

ELECTRICAL CHARACTERISTICS:

No.of Cores	Core Cross sectional Area	Max. DC Resistance at 20˚C	Max. AC Resistance at 90˚C	Approx. Capacitance	Approx. Inductance	Approx. Reactance	Continuous Current Rating
No.of Cores	Core Cross sectional Area	Max. DC Resistance at 20˚C	Max. AC Resistance at 90˚C	Approx. Capacitance	Approx. Inductance	Approx. Reactance	Buried direet in ground	In a buried duct	In Air
No.	mm2	Ω/km	Ω/km	µF/km	mH/km	Ω/km	Amps
3	16	1.91	2.449	0.22	0.616	0.194	78	67	84
3	25	1.2	1.539	0.25	0.583	0.183	100	87	110
3	35	0.868	1.113	0.28	0.563	0.177	119	103	132
3	50	0.641	0.822	0.31	0.546	0.171	140	122	158
3	70	0.443	0.568	0.36	0.517	0.162	171	150	196
3	95	0.32	0.411	0.4	0.501	0.157	203	179	236
3	120	0.253	0.325	0.45	0.485	0.152	232	205	273
3	150	0.206	0.265	0.49	0.477	0.150	260	231	309
3	185	0.164	0.211	0.53	0.468	0.147	294	262	355
3	240	0.125	0.161	0.58	0.458	0.144	340	305	415
3	300	0.1	0.129	0.6	0.451	0.142	384	346	475
3	400	0.778	0.101	0.62	0.445	0.140	438	398	552
3	500	0.0605	0.079	0.66	0.438	0.138	505	460	646

*: Current Ratings are based on IEC 60502-2 & IEC 60287, Max. Conductor Temperature at 90℃, Ambient temperature at 30℃ in Air / at 20℃ in Ground, Thermal resistivity of Soil 1.5 k.m/W & for earthenware ducts 1.2k.m/W and Depth of Laying 0.8m.

Current rating de-rating factors for other than 30℃ ambient air temperature.

20	25	35	40	45	50	55	60
1.08	1.04	0.96	0.91	0.87	0.82	0.76	0.71

Current rating de-rating factors for other than 20℃ ground temperature.

10	15	25	30	35	40	45	50
1.07	1.04	0.96	0.93	0.89	0.85	0.80	0.76

No.of Cores	Core Cross sectional Area	Max. pulling tension on conductor	Charging Current per phase	Zero sequence impedance	Electric Stress at Conductor Screen	Short circuit rating of Phase conductor
No.	mm²	kN	Amps/Km	Ohms/Km	kV/mm	kA, I sec
3	16	0.8	0.26	3.61	2.1	1.4
3	25	1.25	0.3	2.70	2.0	2.3
3	35	1.75	0.33	2.27	2.0	3.1
3	50	2.5	0.37	1.98	1.9	4.5
3	70	3.5	0.43	1.73	1.9	6.2
3	95	4.75	0.48	1.57	1.8	8.5
3	120	6	0.54	1.48	1.8	10.7
3	150	7.5	0.58	1.42	1.8	13.4
3	185	9.25	0.63	1.37	1.7	16.5
3	240	12	0.69	1.32	1.7	21.4
3	300	15	0.72	1.29	1.5	26.8
3	400	20	0.74	1.26	1.4	35.5
3	500	25	0.79	1.24	1.3	44.7

MV Cable

MV cable 02