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
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