SEQSPVC1
O:14|T:2.5|I:1
BLOCK
CB_CLOSED
DISCON_OPEN
MINCB_OPEN
FUSEF_3PH
FUSEF_V
SEQSPVC2
O:66|T:2.5|I:2
BLOCK
CB_CLOSED
DISCON_OPEN
MINCB_OPEN
FUSEF_3PH
FUSEF_V
CB2_POSITION_CLOSE
CB1_POSITION_CLOSE SEQRFUF1_60-1_FUSEF_U
SEQRFUF2_60-2_FUSEF_U
GUID-0F178891-90AB-4A90-8E4F-53ACCEA7A9F0 V1 EN
Figure 242: Fuse failure monitoring
Note that BUS1_Voltage_Presence and BUS2_Voltage_Presence reflect Bus 1 and 2
voltage status respectively. Depending on the application, these signals can be built on the
status of all the breakers that are connected to voltage sources. Take the Main-Tie-Tie-
Main application as an example and consider a rotating machine on the buses.
GUID-2CC2E9D5-B0B4-409D-A907-08A6F818175D V1 EN
Figure 243: Main-Tie-Tie-Main system
To properly determine the voltage presence on a bus, the positions of all the breakers that
are connected to the bus must be known. For example, consider the Bus 1 in the above
diagram, the incomer source 1, MT1 and other voltage through the tie breakers are
1MAC109016-MB C Section 3
REF615 standard configurations
REF615 ANSI 185
Application Manual
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