Vacuum Helium Leak Test System for Cast Aluminum Switchgear
Product Information
The cast-aluminium shell shall be filled with SF6 gas. As there might have casting defects, it is necessary to do leak testing before the SF6 fill. The normal solution is the auto vacuum chamber helium leak test system.
Test Concept
Charge high pressure gas into the product for gross leak test and proof testing
Evacuate the vacuum chamber.
Vent gas from the product.
Evacuate the product and charge helium into the product.
Test the helium signal from the vacuum chamber by the leak detector for fine leak judge.
Recover helium from the product.
Vent vacuum chamber
Technical specification
Cycle time: 10min/pcs.
Leak rate: 1×10-6mbar.l/s
Test pressure: 5bar
Main Parts of System
Vacuum pump: Leybold
Vacuum sensor: Inficon
Helium leak detector: Inficon
Pressure sensor: GE
Solenoid valve: Burkert
PLC: Omron
HMI: Omron
