CHAPTER 6: SETPOINTS
S2 SYSTEM SETUP
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
6–29
Table 6-1: Breaker open / Breaker closed status logic
If the contact input selected under BKR CONNECTED setting is asserted, the breaker is
considered connected to the primary system. When the breaker is determined
disconnected, the breaker state is shown to be neither open, nor closed.
Table 6-2: Breaker status with both contacts configured
User curve
There is one user-programmable User Curve available with the 350 system. Refer to the
S3
Protection/Current Elements/TOC Curves
section for details on how to set the User Curve.
Due to the complexity of the configuration, the User Curve is available only through the
EnerVista 3 Series Setup program.
52a contact
configured
52b contact
configured
Breaker status
Open
Close
Yes
Yes
52a contact open
52b contact closed
52a contact closed
52b contact open
Yes
No
52a contact open
52a contact closed
No
Yes
52b contact closed
52b contact open
No
No
Status unknown
52a contact status
52b contact status
Breaker status
Off
On
open
On
Off
closed
On
On
BKR status failure
Off
Off
BKR status failure