Ct-7000 operating instructions – Vanguard CT-7000 User Manual

Page 28

CT-7000 Operating Instructions

9.1.2 Timing an OPEN Operation With Insertion Resistors

The CT-7000 can time breakers with insertion resistors. The insertion resistor can

range from 10 to 7,000 Ohms. Any insertion resistor more than 7,000 Ohms is detected as
an open circuit. The timing window results will show the main contact time and the insertion
resistor contact time. Graphic reports will show the main contact and the resistor contact
activities on each of the channels.

Table 5.0 Open Operation With Insertion Resistor

STEP

OPERATION

ACTION

DISPLAY

READY TIMER FOR BREAKER OPERATION.

PRESS #1 KEY.

INSERTION RESISTOR?

1.NO

2.YES

SELECT INSERTION RESISTOR.

PRESS #2 KEY.

RESISTOR VALUE:

1.LESS THAN 1000 OHM

2.1000 to 2000 OHM

3.MORE THAN 2000 OHM

SELECT LESS THAN 1000 OHM RESISTOR

RANGE.

PRESS #1 KEY.

TIMING WINDOWS:

1.WINDOW = 1 SEC

2.WINDOW = 10 SEC

3.WINDOW = 20 SEC

SELECT 1-SECOND WINDOW.

PRESS #1 KEY.

TRIGGER MODE:

1. Internal Trigger

2. External Trigger

SELECT INTERNAL TRIGGER.

PRESS #1 KEY.

TIMING MODE:

1. OPEN

2. CLOSE

3. O-C

4. C-O

5. O-C-O

SELECT OPEN OPERATION.

PRESS #1 KEY.

OPEN TIMING

Hold "ARM" Switch,

Then "START".

"STOP" to ABORT

INITIATE OPEN COMMAND.

HOLD THE "ARM"

SWITCH AND

PRESS THE "START" KEY.

TEST IN PROGRESS

Hold "ARM" Until

Test complete.

(Up to 15 seconds)

ANALYZER IS READY TO OUTPUT RESULTS.

NONE.

1.TIME BREAKER

2.GET RESULT

3.SET-UP

4.DIAGNOSTIC

NOTE

The user can set the CT-7000 to print tabulated and graphical reports automatically
after it completes a test. See Paragraph 9.21 for the automatic print setting.