About ALFA BLUE ASNA-RMU
Patented SF₆-Free Solution
By using ambient air as the insulating medium, this innovative technology eliminates the need for gas monitoring and interruptions for refilling, thus reducing maintenance costs and increasing system reliability.
The hermetically sealed design ensures safe and stable operation without the risk of leaks or pressure fluctuations, offering long-term reliable performance.
The busbar disconnector has the same operating sequences as an **SF₆ load-break switch**.
A single cell can replace the following functions:
- Line with disconnector
- Line with circuit breaker
- Transformer with circuit breaker
- Transformer with fuses (in combination with a self-powered relay)
ALFA BLUE SF6-FREE Benefits
A sustainable solution based exclusively on natural air, with a low environmental impact and zero emissions.
Operates maintenance-free for up to 40 years, offering advanced protection against short circuits
The circuit breaker enables quick adaptation to various configurations and operations.
It does not require refills and poses no risk of gas leaks.
Single-phase insulation is patented for performance.
Hermetically sealed design with balanced pressure, ensuring the air pressure is maintained constant.
TEHNICAL DATA
| ⚡︎ | Nominal Current | 630A/1250A |
| ⚡︎ | Rated Short-Circuit Breaking Current | 20kA |
| ⚡︎ | Rated Short-Time Withstand Current | 4s |
| ⚡︎ | Electrical Endurance Level E2 | 5 short-circuit making operations |
| ⚡︎ | Electrical Endurance Level M2 | Mechanical endurance of 10,000 cycles |
| ⚡︎ | Internal Arc Classification | (IAC) AFLR 20kA 1s |
| ⚡︎ | Nominal Voltage | 24 kV |
ALFA BLUE ASNA RMU Booklet