
TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01
A-69
Monday
, November 26, 2001 1:09 pm
• F. W. Bell CG-100A clip-on, Hall effect probe, with current
ranges of 10 A and 100 A.
This probe provides 1 V output on both ranges, when current is at
maximum. It is also capable of 100% overload, bringing output
to 2 V.
The Instrument has two current ranges to use with the probe:
• Low – 20 A
• High – 200 A
The following example shows how inappropriately selected current
ranges can give misleading test results. Trip current was measured using
the TDR9000, an external 1 V/10 A shunt and a F. W. Bell CG-100A
clip-on probe with 10 A and 100 A ranges.
Example #1 (Figure A.81)
Ranges selected: Probe - 10 A, TDR9000 - Low (20 A)
Current Monitoring Trip Operation I
shunt
.631 x 10 = 6.31 A
Figure A.81 Current Monitoring Trip Operation
Содержание TDR9000
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