Medium Voltage Aerial Bunched Cables

Medium Voltage Aerial Bunched Cables (MV ABC) are specifically designed for overhead power distribution systems operating at medium voltage levels. These cables offer numerous advantages over traditional bare conductor systems, making them a popular choice for medium voltage distribution networks. Here are some key features and characteristics of MV ABC:

1. Voltage Range: MV ABC is typically designed for voltage ranges between 3.3 kV and 33 kV. This makes them suitable for medium voltage distribution applications, including urban and rural areas.
2. Construction: MV ABC consists of multiple insulated phase conductors bundled together along with a neutral conductor. The phase conductors are typically made of aluminum and are insulated with cross-linked polyethylene (XLPE). The neutral conductor can be bare or insulated, depending on the specific requirements.
3. Bundled Design: Similar to low voltage ABC, the bundled design of MV ABC reduces the overall diameter of the cable, making it compact and lightweight. The bundled configuration also improves the electrical and mechanical performance of the cable, such as reducing line losses and improving fault current rating.
4. Insulation: The insulation on the phase conductors provides protection against electrical leakage, moisture, and environmental factors. Cross-linked polyethylene (XLPE) is commonly used for its excellent electrical properties, and resistance to weathering.
5. Neutral Conductor: The neutral conductor in MV ABC serves multiple purposes. It acts as a support for the bundled phase conductors and provides a return path for unbalanced currents. The neutral conductor is made of heat treated aluminium-magnesium-silicon alloy wires containing approximate 0.5 percentage magnesium and approximately 0.5 percentage silicon.
6. Improved Safety: MV ABC enhances safety by reducing the risk of electric shock and minimizing the chances of accidental contact with live conductors. The insulation on the phase conductors helps to prevent electrical faults and ensures the safety of maintenance personnel and the general public.
7. Durability and Weather Resistance: MV ABC is designed to withstand various weather conditions and environmental factors. The insulation materials used in the construction offer excellent resistance against UV radiation, moisture, and temperature variations, ensuring long-term durability and reliable performance.
8. Easy Installation and Maintenance: Installing MV ABC is relatively easier compared to traditional bare conductor systems. The bundled design simplifies installation, reduces the number of supporting structures required, and minimizes the need for specialized tools and equipment. The maintenance requirements for MV ABC are also lower, contributing to cost savings and improved system reliability.

Medium Voltage Aerial Bunched Cables (MV ABC) can be installed using dead end clamps. Dead end clamps are specifically designed to secure and anchor the cables to the supporting structures, such as poles or towers. The installation process involves attaching the dead end clamps to the cables and then fastening them securely to the supporting structures, providing mechanical stability and preventing cable movement.

The dead end clamps are designed such that in situations where excessive force is applied to the MV ABC, such as severe weather conditions or accidental impacts, it is essential to rely on the overall design strength of the cable system and supporting structures to withstand those forces. The objective is to maintain the integrity of the MV ABC system and prevent power failures.