Precision Substation Fittings For Substation Construction And Maintenance

Huixing Zhongdian (Beijing) Electric Co., Ltd. manufactures high-quality substation fittings, key components that serve as the "joints and ligaments" of power substation systems. These products act as connectors, fasteners and clamps, enabling reliable electrical conduction, mechanical support and equipment protection for 10kV–220kV AIS and GIS substations.

Core Advantages and Technical Features

1. Superior Mechanical Performance

• Made of high-grade copper, aluminum and alloy steel with high tensile strength, they can withstand conductor weight, wind loads, ice loads and short-circuit electrodynamic forces.
• They are precisely fabricated for zero-gap assembly to ensure solid mechanical connections and low contact resistance.
• The anti-vibration structure absorbs energy from wind-induced vibration and short-circuit impacts to prevent fatigue failure.
• A variety of connection methods including bolting, crimping, wedge clamping and welding cater to various installation requirements.

2. Excellent Electrical Conductivity

• Featuring tin or zinc-plated surfaces, these fittings have low contact resistance (≤10μΩ), limit temperature rise to within 65K and effectively reduce energy losses.
• Copper-aluminum transition fittings prevent galvanic corrosion between dissimilar metals.
• The optimized streamlined structure for high-voltage application reduces corona discharge and radio interference.
• Insulated models are available to improve operational safety in high-voltage environments.

3. Strong Environmental Adaptability

• Surface treatments including hot-dip galvanizing, Dacromet coating and passivation provide excellent resistance against salt spray, acid rain and industrial corrosion.
• Busbar expansion joints compensate for thermal expansion and contraction to prevent structural damage.
• Self-locking wedge clamps require minimal maintenance and cut overall lifecycle costs.
• Lightweight aluminum structures simplify installation and reduce loads on supporting frames.

4. Rational Structure for Easy Installation

• The modular design is compatible with standard substation layouts.
• T-type piercing clamps allow branch connections without cutting main busbars, thus shortening construction downtime.
• Fully compliant with GB/T 31239 and IEC standards, they feature excellent universal interchangeability.
• The integrated design combines connection, fastening and protection functions into a single unit.

Product Classification and Core Functions

Key Application Scenarios

1. Main Equipment Connection

• Copper-aluminum equipment clamps are used for transformer-to-busbar connections to ensure efficient power transmission and stable mechanical performance.
• Special terminal fittings are matched with circuit breakers and disconnectors to adapt to frequent switching operations.
• Special connecting components are used for instrument transformer wiring to ensure accurate signal transmission for measurement and protection systems.

2. Busbar System Installation & Layout

• Busbar supports are fitted with expansion joints during busbar installation to accommodate thermal displacement.
• MGT-type T-connectors are used for T-branch wiring without interrupting main busbar operation.
• Special clamps and supports are used for tubular busbar installation to meet the high-current transmission requirements of high-voltage substations.

3. Insulator and Steel Structure Fixing

• Suspension clamps are paired with suspension insulators to support conductors vertically.
• Tension clamps are used alongside tension insulators to withstand the full tension of conductors.
• U-bolts, ball clevises and other components fasten insulator strings to substation steel frameworks.

4. Severe Working Condition Application

• All fittings feature reliable short-circuit dynamic and thermal stability to maintain structural integrity under fault conditions.
• Anti-corrosion models are suitable for coastal and industrially contaminated areas, while frost-resistant types are suitable for cold regions.
• Low-corona optimized products are specially designed for 110kV–220kV high-voltage substations.

5. Daily Maintenance and Renovation Projects

• Standardized products enable quick equipment replacement and shorten power outage duration.
• Parallel groove clamps allow fast conductor splicing and power capacity upgrading.
• Mechanical connection fittings can serve as temporary connection solutions for emergency fault repairs.

Huixing Zhongdian Substation Fitting Integrated Solutions

We provide a complete range of the above substation fittings, together with matching grounding materials and cable termination accessories. All products are manufactured in strict accordance with GB and IEC international standards and enjoy high compatibility with mainstream substation equipment worldwide. We offer customized products tailored to specific project requirements, alongside fast delivery and full-process technical services ranging from solution design to on-site installation guidance.

Substation fittings are indispensable for the safe and stable operation of modern power systems. As power grids develop toward higher voltage levels and intelligent operation, market demand for high-precision, maintenance-free and long-service-life substation fittings continues to grow. Committed to delivering premium substation fittings that meet strict industry standards, Huixing Zhongdian Electric endeavors to support the construction of safe, efficient and robust power infrastructure worldwide.