Breaking through vacuum interruption’s 200 kV barrier, 252 kV vacuum interrupters now challenge SF6’s dominance for 80% of HV switchgear. With IEC’s new DC circuit breaker standard approved and 550 kV vacuum breakers targeting 2026 completion, learn how non-uniform axial magnetic fields enable reliable HVDC interruption. Critical for grid decarbonization as China Southern Grid deploys 252 kV vacuum breakers in the field.
Interview with Shenli Jia
Professor at Sichuan University and Xian Jiaotong University
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