Vanguard CT-6500 - Manual (Page 28)

CT-6500 Operating Instructions
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9.1.3 Timing CLOSE-OPEN Operation Using Contact Channel #1
The CLOSE-OPEN operation of the breaker simulates a condition where a breaker is
closed on a fault. There are 3 choices for the user to setup the CLOSE-OPEN operation:
1. Contact #1 CLOSE
Open operation is initiated after contact channel # 1 is closed. Refer to
Table 6.0 on the next page.
2. Set DELAY
The user can set a delay from 10 to 500 ms between a CLOSE command
to the OPEN command.
3. No DELAY
Both the CLOSE and OPEN commands are initiated by the CT-6500
simultaneously. The OPEN coil is energized when the Open auxiliary switch
makes.
NOTE
If the Contact #1 CLOSE choice is used, the CT-6500 will first initiate a CLOSE
command and then send an OPEN command only when it detects that the main
contact #1 is closed. The mode truly simulates when the breaker is closing on a fault
condition in the field.