
Test Plan Items
A-62
72A-1898 Rev. A 11/01
Monday
, November 26, 2001 1:09 pm
Dead Tank/OCB
The section discusses the Dead Tank/OCB Main Contact parameters
(Figure A.74) available for a circuit breaker.
OCB Contact
Channel
Activation
These parameters activate the OCB Main Contact channels and change
the label and/or phase designation for the circuit breaker contacts being
monitored.
OCB Resistor
Ranges
Trip/Close
For circuit breakers with insertion resistors, set a
resistor value range in the Test Plan for the program
to pick up the resistor level, for the time during
which the resistor is in the circuit during circuit
breaker operation, and for correct wipe
measurement.
If there is no resistor in parallel with the contact,
set the resistor range to
NONE
. If the value of the
resistor overlaps both ranges, either can be
selected.
N
OTE
An incorrect resistor range setting can result in an incorrect Wipe
calculation. The Average Velocity values can also be incorrect if
Contact Open or Contact Close was used to specify the velocity
measurement zone.
Figure A.74 Dead Tank/OCB – Parameters
Содержание TDR9000
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