Insulated Contact Box

Insulation Contact Box is one of the important components of the primary main circuit of the air-insulated withdrawable metal-enclosed switchgear. The design performance affects the overall performance of the switchgear.
According to the quality function, the functions of the contact box are: insulation shielding, contact busbar support, and compartment separation. The functions of the contact box can be integrated or separated, but the main function is insulation shielding, insulation between the high-voltage primary live main circuit and the grounded partition cabinet, and between phases. For the support of the busbar and the contact, it can be on the contact box, or it can be supported by insulators or other insulating parts, and the compartment separation can be separated by steel plates or insulating plates. The key quality characteristics CTQ need to meet the insulation, dynamic thermal stability requirements, and temperature rise requirements under long-term operating current.