Upper Isolator and Lower Circuit Breaker Switch (40.5kV, 1250A)

This configuration places the isolator above and the circuit breaker below, rated for 40.5kV and 1250A. It utilizes high-precision welded stainless steel gas compartments with independent safety pressure relief.

Modular Design: Supports flexible combination/expansion of units (no gas charging/discharging), adapts to high-voltage metering, and suits SF6 fully insulated ring main units/multi-circuit distribution cabinets.
Structural Safety: Armored structure with metal partitions; primary part of fully insulated structure reaches IP67 protection level.
Hermetic & Low-Consumption: 30-year gas tightness (no leakage); corrosion-resistant mechanism (self-lubricating bearings) enables maintenance-free operation, low energy consumption, high reliability, and long service life.
Expandable Busbar: Plug-in silicone connectors (full insulation/shielding) ensure stable conductivity; modular connection eases future capacity expansion.

The equipment operates under normal indoor conditions in accordance with IEC 62271-1 and GB3906.

Environmental Conditions:

Temperature: Maximum +40°C, 24-hour average +35°C, Minimum -40°C.

Humidity: Maximum 24-hour average relative humidity 95%, maximum monthly average 90%.

Altitude Limits:

Can be installed up to 1500 meters without gas pressure adjustment.

Consultation with pre-sales technical support is required for installations above 2500 meters. Reduced atmospheric pressure at high altitudes (≥1500m) can cause the air compartment to bulge.

Special Conditions:

Operation must comply with the named standards. For special or harsh operating environments, an agreement must be reached between the end user and the manufacturer.