Doble TDR900 User Guide
72A-2612-01 Rev. A 09/06
7
Figure 5. TDR900 OCB Connection
2.6 Sectional Test Cable Option (EHV – Live tank)
This cable option allows for a sectional test (also known as an EHV or a Live tank test)
on a breaker and measures each contact independently for multiple breaks per phase. The
EHV cables are one per phase, each spanning two breaks.
Figure 6. TDR900 EHV Connections: two sets of three
2.7 Motion Option
The Motion option allows for a motion (travel) measurement on a breaker. A transducer
is needed to introduce the motion measurement to the TDR900.
Figure 7. TDR900 Motion Connections
OCB test Connection
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