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Test Plan Items
A-92 72A-1898 Rev. A 11/01
Monday
, November 26, 2001 1:09 pm
Velocity Open
Zone 1 and 2
Velocity Open Zone 1 is comprised of Open and Close parameters listed
above. Zone 2 is similar to Zone 1 and is totally independent of Zone 1
(Figure A.108 on page A-91).
Distance – Distance The Circuit Breaker Average Velocity is calculated
between the two distances specified. Distances are
relative to the final closed position (0.000 in/mm)
of the circuit breaker (Figure A.116 on page A-97).
In Figure A.109, the end distance (
T0 ) must be less
than the start distance ( FROM ).
Figure A.109 Contact Close Distance – Distance
Distance – Time The Circuit Breaker Average Velocity is calculated
between the distance specified and a time after the
circuit breaker mechanism passes the first specified
point. Distance is relative to the final closed
position (0.000 in/mm) of the circuit breaker
(Figure A.110).
Figure A.110 Contact Closed Distance – Time
Starting Open Position
(start of test)
From
Distance
To
Distance
Final
Closed Position
Starting Open Position
(start of test)
From
Distance
To
Distance
Final
Closed Position
Zone 1