Knowledge Base Article #152 - HU Instantaneous Test not stopping correctly
DateApr 18, 2007
ByENOSERV
Filed UnderRTS Routine
ClassRoutine
 
Issue Addressed
 
Causes of Issue
Working with the HU.fst and a Manta MTS-5000. Is having a problem with the Instantaneous Test. Has 8.7 for Winding 1 so it should be 87 amps but for some reason is caluclating 104 amps instead.
 
Solution to this Issue
The message the client is receiving should be �The variable STOP is 104.40 amps. This is�..�

The key to this is that the STOP value that is entered in Action Specs will allow the test to go to 104.40 amps. Since STOP is set to 120% of the expected pickup value of 87, 87 * 1.2 = 104.4.

To make the test run, set STOP to 103%. This will allow the test to ramp to 89.6 amps, close the limit of the MTS-5000.

The next option would be to hookup to a different winding with a lower tap, maybe Winding 2. Then look in the Global Defines and change the formula to calculate based off of WDG_TAP2 rather than WDG_TAP1.

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