Vanguard CT-7000 - Manual (Page 65)

CT-7000 Operating Instructions
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9.18 Slow-Close Test
The CT-7000 offers a unique feature called a "Slow-Close" test. The test permits users to
measure the distance of a breaker's contact travel from the fully opened position to the contact or
"touch" position, to the contact wipe, or penetration distance. The test requires the operator to
manually jack the breaker's contact from the fully open position to the fully closed position.
Contact channel 1, 2, 3 and the transducer channel 1 will be used for “Slow-Close” test. The
CT-7000 will measure the contact touch and contact wipe for each contact channel.
Contact touch is the distance measured from the contact fully opened to the first position
where the contact channel is electrically closed.
Contact wipe, or penetration, is the distance measured from the contact position first,
electrically closed to the final closed, latching position.
Table 23.0 Performing a Slow-Close Test
STEP OPERATION ACTION DISPLAY
1 SELECT DIAGNOSTIC MENU. PRESS # 4 KEY. 1. SLOW CLOSE TEST
2. PRINT DATA
3. TEST TRANSDUCER
4. CHECK HOOK UP
2 SELECT SLOW CLOSE TEST. PRESS # 1 KEY. BREAKER SLOW CLOSE TEST
RMV CB GND (1 SIDE)
"ENTER" TO BEGIN
3 START SLOW CLOSE TEST. PRESS THE "ENTER"
KEY.
CONTACT 1:OPEN
CONTACT 2:OPEN
CONTACT 3:OPEN
LIFT TO CLS BREAKER NOW
4 CONTINUE TO CLOSE BREAKER. NO ACTION. LIFT BRKR TO CLS POS
THEN PRESS "ENTER"
TO FIND CONTACT WIPE
5 RETURN TO MAIN MENU. NO ACTION. 1. TIME BRKR
2. GET RSLT
3. SET UP
4. DIAGNOSTIC
NOTE
The user can also save a Slow-Close test report in the EEPROM. A typical report
of a Slow-Close test is shown on the next page in Figure 25.0.