Figure 130: Forcing Cb Closed Signals - GE P642 Technical Manual

P64x
Open indication is produced by ANDing together the statuses of the relevant CBs. This is dependent on the model
and the terminal status configuration, and is shown in the logic diagram.
For cases where there are no auxiliary contacts available, the CB Open 3 ph signal must be forced low to avoid a
false Pole Dead indication. You can do this by forcing all five CBx Closed DDB signals high using opto-inputs as
shown below.
High
V01230

Figure 130: Forcing CB Closed signals

P64x-TM-EN-1.3
Opto Input 7
Opto Input 8
Opto Input 9
Opto Input 10
Opto Input 11
Chapter 13 - Monitoring and Control
1
CB1 Closed
1
CB2 Closed
1
CB3 Closed
1
CB4 Closed
1
CB5 Closed
281