Cubicle Gas Insulated Switchgear (C-GIS)
Mitsubishi Electric manufactures Cubicle Gas Insulated Switchgear, which we call C-GIS, at ratings up to 72.5kV. In particular the 72.5kV design offers a unique solution to the market place along with a long supply record and Mitsubishi Electric’s reputable manufacturing quality and reliability.
72.5kv C-GIS – 6 panel suite
Notable features of this solution include:
Flexible Design: Switchgear that provides some of the greatest system flexibility in the market, designed to allow freedom when configuring the layout for cable lead-in and power/control cable terminals.
Space saving – Effective, flexible layout: The functional modular structure of the switchboard contributes to ensuring an efficient layout capable of fitting easily into the installation space.
The busbars are installed in two busbar sections, allowing the freedom to create a layout appropriate for the electrical room.
Laboursaving – Reduction of manpower: The optional condition-based maintenance (CBM) unit detects abnormalities in operating devices and other components. This helps prevent failures and realizes efficient maintenance, leading to shorter inspection times and reducing lifecycle costs. Solid insulation can be added to the busbar connectors as an option to allow future system expansion between switchgear. This option not only reduces the gas processing work, but also contributes to reduced installation work when expanding the system.
Energy Saving – Reduced Operating Costs: An electro-magnetic vacuum circuit breaker (VCB) operating mechanism has been adopted, reducing operating energy by approximately 70% compared to conventional motor-spring operating mechanisms.
Optimal equipment placement and the shortest possible main-circuit conductor enables a reduction in power loss (heat value) of up to 60% by minimizing electrical resistance compared to its previous model.
High reliability – Long-term, Trouble free Operation: Electro-magnetic VCB operating mechanisms have been adopted, realizing an ever higher level of reliability. The reduced number of partst1 also translates into a lower chance of failure. HG-VA & HG-VG models have 30% fewer parts compared to our conventional motor-spring VCB operating mechanisms.
Safe Design – Ensures operator’s safety: Busbars and other main-circuit components are fitted inside strong, grounded, metal containers to secure safety. Tests have been carried out to confirm that insulation performance can withstand system voltage even if the gas pressure drops to atmospheric pressure.
Minimal Maintenance – Reduced Maintenance Costs: The high-tech electro-magnetic VCB operating mechanisms provide maintenance-free use for a period of over 15 years.
Environmentally friendly – SF6-free: Mitsubishi Electric Co. is a global leader in dry compressed-air insulation technologies, which has been developed through extensive experience in designing and developing SF6 switchgear. Under dry, clean and compressed conditions, air has good insulation properties, making it an ideal solution for switchgear insulation (dry-air insulation is only available for HG-VA).