Rated voltage: 12kV / 24kV (main circuit).
Rated current:
Main busbar/load switch: 630A, 1250A (common); up to 1600A or 2000A (specific manufacturer/design).
Fuse circuit (-F combination): usually ≤125A or 200A (with fuse protection transformer).
Rated frequency: 50Hz.
Rated short-circuit breaking current:
Load switch: 20kA, 25kA (effective value).
Fuse: Provides short-circuit breaking capacity (determined by fuse parameters, much higher than load switch).
Rated short-circuit closing current: 50kA, 63kA (peak value).
Rated short-time withstand current (Icw): 20kA / 4s, 25kA / 3s (effective value).
Rated peak withstand current (Ipk): 50kA, 63kA (peak value).
Rated insulation level (typical value of 12kV cabinet):
Power frequency withstand voltage (1min): 42kV to ground/phase-to-phase; 48kV at isolation break.
Lightning impulse withstand voltage: 75kV to ground/phase-to-phase; 85kV at isolation break.
(The value of 24kV cabinet is higher, refer to GB standard)
Main circuit resistance: ≤ design value (such as ≤150μΩ @ 630A, depending on the manufacturer).
Protection level:
Casing: IP4X (anti-≥1mm solid).
Internal compartment: IP2X (proof ≥12.5mm solid).
Fuse cartridge: IP6X (dust-tight).
SF6 gas parameters:
Rated filling pressure: 0.04～0.05 MPa (gauge pressure, at 20℃).
Annual leakage rate: ≤0.5%/year (or ≤1%/year, lower for high-demand designs).
Alarm pressure: usually set at 0.03 MPa.

High safety: Strict "five-protection" interlocking, SF6 insulation, pressure relief channel, and reliable grounding design.
Compact structure: Modular design, small footprint, especially suitable for places with limited space.
High reliability: SF6 has excellent insulation performance, reliable gas box sealing, and long maintenance-free period (up to more than 20 years).
Convenient operation: The three-position switch has high integration, simple and labor-saving manual operation; optional electric operation.
Strong environmental adaptability: The sealed gas box effectively resists harsh environments such as moisture, condensation, dirt, and dust.
Flexible expansion: Standardized unit combination, easy to build a ring network system or terminal distribution station.
Good intelligent foundation: Easy to upgrade to an intelligent ring network cabinet to support distribution automation.

Urban distribution network ring network power supply node.
Terminal substations (10kV side) in industrial and mining enterprises, residential areas, commercial centers, hospitals, schools, etc.
High voltage room of box-type substation (European box-type substation).
Low voltage side or collector line of booster station in wind farm and photovoltaic power station.
Switch station.