Vacuum dead-tank circuit breaker 3AV2 DT, Blue portfolio up to 550 kV class, SF6-free vacuum interrupter with clean-air insulation — detailed ratings available on request

• EHV dead-tank stage of the SF6-free 3AV Blue vacuum circuit-breaker platform, hierarchy product line "Blue Dead Tank up to 550 kV (3AV)"
• Dead-tank arrangement: interrupters in an earthed metal tank, line entry through bushings that can accommodate current transformers
• Zero F-gas concept of the Blue portfolio: clean-air insulation (80 % nitrogen / 20 % oxygen) with zero global warming potential from the insulating medium
• No gas handling rules, gas reporting or accounting, and no toxic decomposition products — the clean-air medium can simply be vented
• No published ratings table in this library for the 550 kV stage — the Blue DT flyer documents the 3AV1 generation (72.5–145 kV); 3AV2 DT ratings on request