This document introduces the features of the Siemens SIMOSEC 12 type medium-voltage air-insulated switchgear, including application scenarios, technical data, product range, panel design, operation, components, cable connection, transformers, indicating and measuring equipment, transformer monitoring systems, protection systems, low-voltage compartment, low-voltage equipment, interlocks and locking devices, dimensions, installation, standards and more.
The SIMOSEC 12 is a factory‑assembled, type‑tested, three‑phase, metal‑enclosed, indoor medium‑voltage switchgear designed for power distribution in substations, high‑rise buildings, industrial plants and other applications. It offers a modular, space‑saving design with optional low‑voltage compartments and panel heating for severe ambient conditions.
Key features include air‑insulated busbars, gas‑insulated three‑position switch‑disconnector, vacuum circuit‑breaker up to 630 A, and integrated low‑voltage niche. The catalog details electrical data, pressure values, temperature ranges, dimensions, and compliance with IEC and GB standards, as well as reliability and safety information.
| Rated voltage | 12 kV |
|---|---|
| Rated normal current of feeders | 630 A |
| Rated lightning impulse withstand voltage | 60 kV |
The SIMOSEC 12 is rated for up to 12 kV.
The rated normal current of the ring‑main feeders is 630 A.