doble TDR9000 - Figure A.39 Set Magnitude of Close Current

TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 A-39
Monday, November 26, 2001 1:09 pm
Close Current
Magnitude
Timing a close test based on close current magnitude is achieved through
a combination of the Close Pulse, Timing Event and Timing Trigger
parameters (Figure A.39).
Figure A.39 Set Magnitude of Close Current
The timing trigger value is set as a percentage of full scale current (of the
range selected) and is adjustable in 10% increments.
The selection made calculates the timing of the Main Contact (t
2
) and
resistor switch (t
1
) (Figure A.40 on page A-40) after the close current
reaches 30% of the selected full scale for the close current range if the T0
option is selected in ”Resistor Switch Timing – Close” on page A-77.
It is important to select the current range (”Current Selection
Probe/Shunt” on page A-68) and percentage of the full scale so that the
value selected in Timing Trigger is less than the maximum value of the
close current.