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Gas Insulated high voltage switchgear typically uses an SF6 gas environment to quench arcing when the circuit breaker is activated. A typical high voltage circuit breaker assembly consists of three breakers (one for each power phase) mounted on a common frame with an associated panel that contains control electronics and plumbing to manage the SF6 gas. The individual breakers are enclosed in “tanks” which contain the pressurized SF6 gas environment around the switch mechanism. SF6 leakage can occur in many locations, including: porosity in aluminum tank castings, casting assembly seals, welds, ceramic insulators and associated joints, and interconnecting distribution piping. Leak testing of the subassemblies and finished product provide confidence that the sufficient pressurized SF6 gas will be contained inside the unit to prolong its functional life, minimize maintenance, and reduce environmental emissions.
Helium Vacuum (HV): An automated method where the test part or test fixture is evacuated to full vacuum while helium is introduced to the opposite barrier of the part.
Helium Accumulation (HA): An automated method of capturing and accumulating helium in an enclosure surrounding a part pressurized with helium.
Helium Sniffing (HS): A manual method of sniffing a pressurized part to detect helium escaping a leak.
Multi-Gas Sniffing (MS): A manual method of sniffing a pressurized part using a variety of instruments specifically designed for non-helium tracer gases such as refrigerants, hydrogen and SF6.
Custom options and systems are available. Request a Quote to meet your needs.