Test Plan Items
A-82 72A-1898 Rev. A 11/01
Monday, November 26, 2001 1:09 pm
Travel Parameters
Figure A.95 shows the Travel parameters and specifications available for
a circuit breaker.
Figure A.95 Travel – Parameters and Specifications
Total Travel,
Contact Wipe
Parameters include:
Total Travel This is the total Circuit Breaker Main Contact travel
during close or open operations. Negative
tolerance for total travel must never be greater than
the specified total travel.
This is the Transducer Connecting Rod or Rotary
Adapter travel, if the Transducer Connecting Rod
or Rotary Adapter and Main Contact travel are
identical (Transfer Function is 1).
Contact Wipe (Close) This is the distance the Transducer Connecting Rod
or Rotary Adapter moves from the first Main
Contact make to the fully closed position of the
circuit breaker.
The Main Contact used to calculate wipe is
determined by the phase selected on the Motion
Channel Parameters (Refer to ”Motion Channel
Parameters” on page A-56).
Negative tolerance for contact wipe must never be
greater than the specified contact wipe.
For Oil Circuit Breakers, the Instrument determines wipe for each Motion
Channel that is activated and has a transducer connected to it.
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