Interruption in Air
A-2 72A-1898 Rev. A 11/01
Monday, November 26, 2001 1:09 pm
Interruption in Air
The following discussions explain circuit breaker interruption in air,
including:
• Air-Magnetic Circuit Breakers
• Air-Blast Circuit Breakers
Air-Magnetic
Circuit Breakers
Figure A.2 and Figure A.3 on page A-4 explain the process that occurs
for current interruption in an Air-Magnetic Circuit Breaker.
The distinctive feature of Air-Magnetic Circuit Breakers is the use of a
magnetic field to lengthen the arc and force it into a labyrinth of
insulating plates where it is stretched, dispersed and cooled by the
interleaved arc plates.