Cu/XLPE/CTS/LSZH/FR/PE 19/33kV 3×300mm² Medium Voltage Power Cable

Product Overview

The Cu/XLPE/CTS/LSZH/FR/PE 19/33kV 3×300mm² is a high-performance medium voltage power cable designed for critical power distribution networks. This three-core copper cable is manufactured to the highest international standards, featuring cross-linked polyethylene (XLPE) insulation and a copper tape screen (CTS) for superior electrical performance.

Rated at 19/33kV, this cable is specifically engineered for applications where fire safety is paramount, incorporating a low smoke zero halogen (LSZH) outer sheath that significantly reduces toxic gas emissions and smoke density in the event of a fire.

Key Features

• Voltage rating of 19/33kV – Suitable for medium voltage primary distribution networks

• Three-core 300mm² copper conductor – Provides excellent conductivity and current carrying capacity with Class 2 stranded construction per IEC 60228

• XLPE (cross-linked polyethylene) insulation – Offers high thermal rating of 90°C normal operation and 250°C under short circuit conditions, with superior dielectric strength

• Copper tape screen (CTS) – Provides effective electromagnetic shielding and fault current carrying capability, ensuring stable operation and personnel safety

• LSZH (low smoke zero halogen) outer sheath – Emits minimal smoke and no toxic halogen gases when exposed to fire, making it ideal for installations in confined or public spaces

• Flame retardant (FR) properties – Self-extinguishing characteristics prevent fire propagation along the cable route

• Polyethylene (PE) sheath material – Offers excellent moisture resistance and mechanical protection

Applications

• This medium voltage power cable is widely used across multiple sectors. In utility power distribution, it serves as a primary feeder cable for 33kV substations and as distribution cable for industrial park power grids.
• For renewable energy projects, the cable is commonly used in large-scale solar farm collection systems, onshore and offshore wind farm medium voltage connections, and battery energy storage system (BESS) interconnections.
• In infrastructure projects, it provides reliable power for airport and seaport distribution systems, tunnel and metro power supply networks, and data center medium voltage feeds.
• The cable is also extensively deployed in heavy industrial facilities including steel mills, petrochemical plants, automotive manufacturing facilities, and mining operations.
• For commercial installations, it serves high-rise building main feeders, hospital power distribution systems, and university campus primary networks.

Construction Details

• The cable features a Class 2 stranded copper conductor made from high-purity oxygen-free copper, ensuring maximum conductivity and flexibility for easier installation.
• Surrounding the conductor is a semi-conductive conductor screen that provides smooth electrical stress distribution and prevents partial discharges that could compromise cable life.
• The XLPE insulation layer forms the heart of the cable, providing excellent electrical properties, thermal stability up to 90°C continuous operation, and resistance to aging and moisture ingress.
• An insulation screen consisting of a semi-conductive layer combined with the copper tape screen ensures proper electrical stress control and provides a path for fault currents.
• The copper tape screen (CTS) is applied helically with overlapping construction, offering electromagnetic shielding and serving as an earth fault current return path.
• A separation sheath provides mechanical protection between the screen and armour (where applicable), ensuring structural integrity.
• The LSZH outer sheath in black color completes the construction, providing UV resistance, moisture barrier, mechanical protection, and fire safety characteristics.

Parameters

Why Choose LSZH Sheathed Medium Voltage Cable?

• The LSZH (low smoke zero halogen) sheath represents the gold standard for fire safety in electrical installations. Zero halogen emission during combustion means no toxic hydrogen chloride gas is released, eliminating the risk of acid gas inhalation and equipment corrosion.
• Low smoke density ensures visibility is maintained at over 60% light transmittance, allowing building occupants to locate exits safely during a fire emergency. The LSZH sheath is also UV stabilized for outdoor installation and resists moisture ingress even in underground ducts or direct burial applications.
• The copper tape screen provides effective electromagnetic interference (EMI) shielding, protecting sensitive control and communication circuits that may run parallel to the power cable while also ensuring rapid fault detection by protection relays.

Installation Guidelines

• For proper installation, the cable should be stored on clean, dry reels and protected from direct sunlight and moisture before use. The minimum recommended pulling tension is approximately 50 times the conductor cross-sectional area in Newtons, with basket weave pulling grips to distribute tension evenly across the cable.
• When routing the cable, maintain a minimum bending radius of 15 times the overall diameter during pulling operations. For long runs, use cable rollers at regular intervals to reduce friction and prevent sheath damage. Avoid sharp edges and ensure all duct entries are properly bushed.
• For termination, use appropriately sized copper lugs and follow the termination kit manufacturer’s instructions precisely. The copper tape screen must be properly earthed at both ends as per local regulations and engineering standards. After installation, perform insulation resistance testing with a 5kV DC megger, followed by high voltage testing per IEC 60502-2 requirements.

Frequently Asked Questions

What does the Cu/XLPE/CTS/LSZH/FR/PE designation mean?
Each element specifies a construction feature: Cu indicates copper conductor, XLPE is cross-linked polyethylene insulation, CTS denotes copper tape screening, LSZH means low smoke zero halogen outer sheath, FR indicates flame retardant properties, and PE designates the sheath material as polyethylene.

What voltage system is this cable designed for?
The cable is rated for 19/33kV, making it suitable for 33kV primary distribution systems. The maximum system voltage capability is 36kV.

Is this cable suitable for direct burial?
Yes, the LSZH outer sheath provides good moisture resistance for underground installation. However, for areas with rodent activity or high mechanical risk, additional protection such as sand bedding or conduit may be recommended.

What is the advantage of copper tape screening?
The copper tape screen provides electromagnetic shielding to protect nearby sensitive equipment from interference, serves as a fault current return path, and ensures personnel safety by maintaining equipotential bonding.

Why choose LSZH over PVC sheath?
In a fire, standard PVC cables emit dense black smoke and toxic hydrogen chloride gas. LSZH sheath produces minimal smoke and no halogen gases, greatly improving safety in tunnels, high-rise buildings, hospitals, and any enclosed public space.

Do you provide free samples?
Yes, free samples are available upon request with the customer responsible only for shipping costs

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