Vanguard VCBA ver.10.xx - Manual (Page 74)

REV 2 VCBA VERSION 10.xx SOFTWARE MANUAL
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6.0 TIMING A CIRCUIT BREAKER USING THE VCBA SOFTWARE
The VCBA software can be used to control a CB analyzer and run circuit breaker timing tests.
The following tests are supported: OPEN, CLOSE, OPEN-CLOSE, CLOSE-OPEN, OPEN-CLOSE-
OPEN, and STATIC RESISTANCE. Also, a test plan for a specific breaker can be used with the test
(please see section
5.10 for details). If a test plan is used, the Pass/Fail indicator will be
displayed based on the settings in the test plan.
6.1 Performing an OPEN or CLOSE test
To perform an OPEN or CLOSE test:
1. Make sure the VCBA software is running. Connect the CB analyzer to the PC via the RS-
232C port.
2. Put the CB analyzer in Computer Interface Mode. Please see section 3.2 for details.
3. Click on the File menu and select Time Breaker (alternatively you can click on the Time-
CB menu from the Main menu bar). The following window will be displayed:
4. From the “Type” radio box group, select either “Open” or “Close”.
5. From the “Timing Window” radio box group, select the desired timing window.
NOTE
• For the 1-second timing window, the timing resolution is ±100 micro-
seconds
• For the 10-second timing window, the timing resolution is ±1.0 milli-
seconds
• For the 20-second timing window, the timing resolution is ±2.0 milli-
seconds