Product overview
Toshiba’s 24 kV solid-insulated switchgear encapsulates primary conductive parts in epoxy resin and uses a vacuum circuit breaker. The published architecture does not use SF6 for primary insulation.
Verified configuration
The official specification table for type KA-20M25 states 24 kV, 630 A or 1,250 A, 25 kA rated short-time withstand and 50/60 Hz. LearnSwitchgear records 1,250 A as the upper value for this identified type, not as the rating of every functional unit.
Engineering significance
The design provides a comparison with dry-air GIS because its dielectric architecture, thermal behaviour, inspection access, end-of-life process and failure modes differ materially.
Lifecycle caution
The global page still cites the historical IEC 298 designation. Confirm current IEC 62271 conformity, type-test certificates, production status, service support and regional availability before considering the product for a new project.