Yes — 35kv switchgear and 33kv switchgear belong to the same 40.5kV equipment class. Panels rated 36kV or 40.5kV serve 33kV networks with margin for insulation. In compact outdoor applications, the same system also uses a ring main unit at transformer tap points, so a 33kV project frequently combines a 35kV-class switchboard with RMUs.
No — gis switchgear is one option, not a requirement. Many 33kV utility projects still use metal clad switchgear with air insulation indoors. The metal clad vs metal enclosed choice is separate from gas versus air: metal clad for withdrawable breakers, metal enclosed for fixed panels, and gis only when space or land cost forces a compact layout.
Gas insulated switchgear seals busbar and breakers in SF6, shrinking the footprint by up to 60 percent — the standard for urban and indoor substations. Air insulated switchgear uses open clearance and solid insulation with vacuum interrupters, needs more room, but has no gas handling and suits coastal or LEED-tracked sites. For 33kV both are accepted at utility level.
It depends on the substation role. Metal clad switchgear lets operators roll the vacuum breaker out on guide rails for inspection without touching the busbar. Metal enclosed switchgear keeps a simple fixed construction — cheaper and smaller, but the whole panel must be de-energized for breaker work. At 33kV, utility feeders normally spec metal clad.
33kV switchgear handles primary distribution at utility substations, wind and solar collector stations, and large industrial plants. For indoor switchboards, buyers choose between metal clad switchgear, with withdrawable breakers and IEC 62271-200 Form 3/4 segregation, and metal enclosed switchgear, with fixed breakers at 20-30 percent lower cost.
CE certified as standard. IEC 62271-200 type-tested for short-circuit, temperature rise, and dielectric performance. Market-specific compliance available: SASO for Saudi Arabia, SNI for Indonesia, GOST for Russia. Third-party testing at KEMA or ASTA arranged on request. Test reports and material certs ship with the panels.
Our 11kV switchgear is type-tested from 25kA to 40kA short-circuit withstand per IEC 62271-200. The busbar is silver-plated copper with insulated supports throughout. Every panel includes internal arc classification where specified. Type-test reports from accredited labs ship with every order.
15kV switchgear typically refers to metal clad or metal enclosed indoor panels rated for 15kV class systems, common in North America and parts of Asia. A ring main unit is a specific compact switchgear configuration designed for ring network topology — it can be rated at 12kV, 15kV, or 24kV depending on the market. An RMU at 15kV performs the same ring switching and transformer protection function as at 12kV, just with higher clearance distances and different test certificates. You cannot swap a metal clad panel for an RMU — they serve different positions in the network and use different form factors.
