Medium Voltage Covered Conductor (MVCC)

Medium Voltage Covered Conductors are developed to improve the reliability of the distribution of electricity. The concept of covered conductor has proven to be extremely functional and reliable. It consists of a conductor surrounded by a covering made of insulating material as protection against accidental contacts with other covered conductors and with grounded parts such as tree branches, etc. Medium voltage covered conductors are produced in voltage rating between 11KV to 33KV.

Indian state utilities are making focused efforts for upgrading & strengthening medium voltage distribution lines in forest and wildlife sanctuaries to avoid fatal accidental death due to electrocution of wildlife birds & animals that come in contact with live overhead bare conductors. In the last few decades, we have noticed several electrocution cases in India.

Covered Conductors (as per EN 50397-1:2006) is widely accepted and installed in various DESCOMs of India who are using the AAAC/ACSR Covered conductors and Flashcab is regularly supplying them either directly/or through EPC our 11KV and 33KV AAAC/ACSR covered conductors.

Applicable standard

EN 50397-1, BS EN 50182, IS 398-2, IS 398-4, IEC 61089

Construction

ConductorLongitudinally watertight stranded all aluminium alloy (AAAC), AL-7, AL-59, or AL-59 Aluminium Clad Steel (ACS).

Conductor ScreenExtruded semi-conducting compound

Inner CoveringCross-linked Polyethylene XLPE (Without Carbon Black)

Outer CoveringHigh-density (HDPE) UV protected and anti-tracking black coloured

Note* Conductor screen, inner insulation and outer insulation coextruded and bonded together.

Application of MVCC

In some applications, medium voltage-covered conductor cables are superior to bare conductors due to several benefits. Here are a few main benefits:

Overhead Power Distribution Lines

Medium-voltage electricity is delivered from substations to residential, commercial, and industrial areas via overhead power distribution lines, which frequently use covered conductors.

By shielding the conductors from the elements, the insulation lowers the possibility of electrical failures brought on by exposure to pollutants, moisture, or other impurities.

Urban and Suburban Areas

Covered conductors can be used to increase the visual impact of power lines and reduce the possibility of unintentional contact with live parts in urban and suburban settings where aesthetics and safety are valued.

High Environmental Stress Areas

Over an extended period, bare conductor performance may deteriorate in environments with elevated pollution, moisture, or corrosive elements. The power distribution system's longevity is increased by covered conductors, which offer an extra degree of defense against these types of environmental stresses.

Areas with Vegetation

In places with a lot of vegetation, where there is a greater chance of branches or trees coming into contact with power lines, covered conductors are appropriate. The insulation lessens the possibility of faults and outages caused by vegetation.

Coastal and Harsh Environments

Covered conductors offer an extra layer of defense against corrosion and environmental damage in coastal areas and other harsh environmental regions where exposure to salt, humidity, and extreme weather is a concern.

High-Altitude Installations

Given their greater exposure to inclement weather, covered conductors may be recommended in mountainous or high-altitude areas. The insulation aids in shielding the conductors from environmental hazards like snow and ice.

Industrial Facilities

Industrial facilities may use medium voltage-covered conductors to distribute power from the main substation to different areas of the building. Harsh operating conditions and the presence of industrial chemicals are two things that the insulation helps shield against.

Renewable Energy Projects

Covered conductors can be used for medium voltage interconnection within the power generation facility and for connecting the facility to the larger electrical grid in renewable energy projects, such as solar or wind farms.

Railway Electrification

In electrified railway systems, where trains are powered by medium voltage, covered conductors may be used. Insulation improves safety by reducing electrical interference.

Environmental Applications

Hot Environments

Cold Environments

Forest Areas

Complete Specification Data

Cross Section & Construction Details

Cross Section (Sq mm)	Construction	Type
50	7 Strands	AAAC / AL-7 / AL -59
55	7 Strands	AAAC / AL-7 / AL -59
70	7 Strands	AAAC / AL-7 / AL -59
80	7 Strands	AAAC / AL-7 / AL -59
90	7 Strands	AAAC / AL-7 / AL -59
100	7 Strands	AAAC / AL-7 / AL -59
120	19 Strands	AAAC / AL-7 / AL -59
125	19 Strands	AAAC / AL-7 / AL -59
148	19 Strands	AAAC / AL-7 / AL -59
159	19 Strands	AAAC / AL-7 / AL -59
160	19 Strands	AAAC / AL-7 / AL -59
232	19 Strands	AAAC / AL-7 / AL -59
241	19 Strands	AAAC / AL-7 / AL -59

Cross Section & Construction (AL-59 ACS)

Cross Section (Sq mm)	Construction		Type
Cross Section (Sq mm)	ACS	AL-59	Type
31.6	1 Strands	6 Strands	AL-59 ACS
52.88	1 Strands	6 Strands	AL-59 ACS
78.82	1 Strands	6 Strands	AL-59 ACS
104.98	1 Strands	6 Strands	AL-59 ACS
120	7 Strands	26 Strands	AL-59 ACS
160	7 Strands	30 Strands	AL-59 ACS
241	7 Strands	30 Strands	AL-59 ACS

Cable Attributes & Nominal Thickness

Sr.NO	Cable Attributes	UOM	Nominal Thickness
Sr.NO	Cable Attributes	UOM	11 KV	22 KV	33 KV
1	Aluminium Alloy Wire	Sq.mm	As Per Requirement
2	Extruded Longitudinal Water Blocking Layer	mm	As Required to make Water Blocked Arrangement
3	Extruded Semi Conductive Layer	mm	0.3	0.3	0.4
4	Inner Insulation of XLPE Without Carbon Black	mm	1.2	1.32	2.43
5	Outer Insulation with UV & Track Resistant HDPE	mm	1.1	1.1	1.2