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

Page 29

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CT-7000 Operating Instructions

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-7000
simultaneously. The OPEN coil is energized when the Open auxiliary switch
makes.

NOTE

If the Contact #1 CLOSE choice is used, the CT-7000 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.