110kv cable termination

For high-voltage applications like 110kv, you must prioritize insulation materials, typically Liquid Silicone Rubber (LSR) or EPDM, which offer superior tracking resistance and hydrophobicity. Ensure the termination matches the cable cross-sectional area (e.g., 240mm² to 1200mm²) and the insulation diameter. Key performance metrics include Partial Discharge (PD) levels < 5pC at 1.5U0 and a Basic Insulation Level (BIL) of at least 550kV to withstand lightning surges.

Suppliers must provide test reports according to IEC 60840, which governs power cables with extruded insulation and their accessories for rated voltages above 30kV up to 150kV. Additionally, look for IEEE 48 compliance for outdoor terminations. It is vital to verify Type Test Reports from independent laboratories like KEMA, CESI, or CPRI to ensure the product can handle long-term electrical stress.

Dry-type terminations (using solid interface technology) are increasingly preferred because they are explosion-proof, maintenance-free, and environmentally friendly as they eliminate the risk of oil leakage. Oil-filled (porcelain) terminations are traditional and robust but require regular pressure monitoring and oil sampling, making them more suitable for legacy systems where weight and leakage are less of a concern.

For coastal or high-pollution areas, you must specify a creepage distance (typically 31mm/kV or higher) to prevent flashovers caused by salt or dust accumulation. For indoor GIS (Gas Insulated Switchgear) applications, ensure the termination is a plug-in type compatible with IEC 62271-209 standards for standardized interfaces.

Always request a Factory Acceptance Test (FAT). For 110kv equipment, you should hire a third-party inspector to witness the AC withstand voltage test and partial discharge test before the goods leave the factory. On Made-in-China.com, prioritize Audited Suppliers who have undergone comprehensive on-site verification of their production facilities.

These items are fragile and heavy. Ensure the supplier uses IPPC-certified fumigated wooden crates with internal shock-absorption padding. For porcelain insulators, specify vertical crating to prevent structural cracks during sea transit. Ensure the Incoterms clearly define the point of risk transfer, preferably using CIF or DAP to include insurance coverage for high-value cargo.

Focus on the Total Cost of Ownership (TCO) rather than just the unit price. Negotiate for a longer warranty period (typically 24-36 months) and the inclusion of installation kits (stress cones, lubricants, and specialized tools). Ask for a price breakdown of the raw materials (silicone/copper) to understand how market fluctuations affect your final quote.

Utilize Secured Trading Services provided by Made-in-China.com to protect your payment. Use a staged payment structure: 30% deposit, 60% after successful FAT/inspection, and 10% after receipt of the Bill of Lading or site commissioning. This ensures the supplier remains committed to quality throughout the production cycle.