vacuum circuit breaker / short-circuit / high-power / medium-voltage
3AH3

• Type:

  vacuum

• Electrical characteristics:

  short-circuit, high-power, medium-voltage

• Operating mode:

  modular

• Other characteristics:

  indoor

• Current:

  Max.: 8,000 A

  Min.: 1,250 A

• VAC:

  Max.: 40.5 kV

  Min.: 7.2 kV

The powerful 3AH3 vacuum circuit breakers were the first 63- and 72-kA vacuum circuit breakers on the market tested in accordance with IEEE C37.013 for load currents up to 12,000 A and short-circuit currents up to 100 kA. In addition to the standard designs, we can also offer phase-segregated versions with separate switching units. The low resistance in the main current path allows the 3AH3 vacuum circuit breaker to be used with operating currents of up to 6,300 A with no forced cooling, or up to 8,000 A with forced cooling. These modular vacuum circuit breakers can also be installed horizontally using special cooling elements and are suitable for retrofitting in existing systems.