Vanguard CT-8000 - Manual (Page 34)

CT-8000 USER’S MANUAL REV 2
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The following screen will be displayed:
Type the time value using the numeric keypad and then press the
[ENTER]
key.
The analysis points will be set and you will be returned to the “START-UP” menu.
2. CONTACT MINUS TIME
Press the [2] key to select the CONTACT MINUS TIME option.
NOTE
For the contact minus time, the user enters the time (in milliseconds)
before the contact channel #1 makes the transition from OPEN to
CLOSE or CLOSE to OPEN to define the analysis point #2.
The following screen will be displayed:
Type the time value using the numeric keypad and then press the [ENTER] key.
The analysis points will be set and you will be returned to the “START-UP” menu.
NOTES
• Average velocity through the arc zone is calculated using the following formula:
V
avg
= Distance / Time
• The breaker contact velocity can be recalculated based on the data stored in the
memory after any new analysis points are selected. The user does NOT need to
operate the breaker again to acquire new contact velocity data after changing the
analysis points because the new velocity will be calculated from the travel data
stored in the memory from the last operation.
• For complex velocity calculations, the user can create a test plan using the
included CT-8000 Breaker Analysis PC Software. The test plan can then be
downloaded to the CT-8000 and recalled before running timing tests.
OPEN ANALYSIS PT 2
ENTER TIME FROM CH1
TIME (mS): 000.0
“ENTER” TO CONFIRM
OPEN ANALYSIS PT 2
ENTER TIME FROM CH1
TIME (mS): 000.0
“ENTER” TO CONFIRM