TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 I-11
Monday, November 26, 2001 1:09 pm
Figure I.5 shows the Doble ABB AHMA 4/8 Transducer for use with ABB
SF6 Gas circuit breakers using the AHMA 4 or AHMA 8 operating
mechanism. It is shown with the drive fork engaging the optical encoder
assembly and the gauge block in front of the transducer. The gauge block
is used to insure the coupler block is in the same plane as the surface to
which the transducer is attached.
Figure I.5 ABB PA, ELF, and PM (345 kV and above)
SF6 Gas Circuit Breakers