Vanguard VCBA ver.10.xx - Manual (Page 76)

REV 2 VCBA VERSION 10.xx SOFTWARE MANUAL
74
6.2 Performing an OPEN-CLOSE test
For an OPEN-CLOSE test, the CB analyzer will first open then close the circuit breaker after a
preset time (in milli-seconds). To perform an OPEN-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 “Open-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
6. From the “Insertion Resistor” radio box group, select the desired insertion resistance
value.
7. From the “Trigger Type” radio box group, select the trigger type.