Sheet-arch crossarm for pin insulators

The term “sheet-arch” refers to a metal structure that surrounds the rigid insulator, usually made of ceramic or composite material, to protect it against mechanical and environmental stresses.

This allows the insulator to maintain its electrical capabilities while being resistant to external forces (such as strong winds, snow, or impacts) that could otherwise damage it or affect its performance.

Role of sheet-arch armoring for NVR1 insulators:

Mechanical protection: These armors help maintain the integrity of rigid insulators by protecting them against shocks and physical stresses, such as those generated by cables under tension.

Durability: The armor enhances resistance to wear and corrosion, which is essential for outdoor installations, particularly in harsh environments (coastal or industrial zones, for example).

Electrical stability: Beyond its mechanical function, the armor ensures the insulator retains its insulating properties, thereby reducing the risk of short circuits or failures caused by moisture, dirt, or temperature variations.

Ease of maintenance: These devices are designed to be durable while allowing simplified maintenance, which is an advantage in managing large-scale electrical infrastructures.

The NVR1 model designates a specific series of these armors, used in particular applications depending on the standards and configuration of the electrical installations.

This solution thus guarantees the longevity and reliability of rigid insulators, a key element in electrical networks, especially in high-voltage lines.