SF6 Gas-Filled Load Switch (40.5kV, 630A)

Rated for 40.5kV and 1250A in a compact layout.
Upper isolator and lower breaker for flexible operation.
CNC-processed and robot-welded for high precision.
Independent pressure relief for personnel safety.
Modular design ensures easy installation and scalability.
Suitable for industrial, commercial, and renewable energy grids.

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Product parameters

Model	Parameters
Rated voltage (kV)	40.5
Rated current (A)	630
Rated frequency (Hz)	50
Rated short-circuit making current (peak)	50
Rated short-time withstand current duration	4
Rated peak withstand current (peak)	50
Rated short-time power frequency withstand voltage (Phase-to-Phase, Phase-to-Earth)	95
Rated Lightning Impulse Withstand Voltage Peak (Phase-to-Phase, Phase-to-Earth)	185
Rated Short-Time Power Frequency Withstand Current (Break)	95
Rated Lightning Impulse Withstand Voltage Peak (Break)	95
Rated Cable Charging Breaking Current	20
SF6 Charging Pressure (Gauge Pressure at 20°C) MPa	0.045
Contact Force	200-300
Three-Phase Non-Simultaneous Contact Opening (ms)	≤2
Three-Phase Non-Simultaneous Contact Closing (ms)	≤2
Circuit Resistance (uΩ)	≤50

Features

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.

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