GE Industrial Solutions Entellisys System User Manual - Manual (Page 87)

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6.0.2.2 Buses, topologies and the Association Matrix
In the system in Figure 6-1, circuit breakers M1, M2, and T1 are topology circuit breakers, since
their state (i.e., open or closed) determines how the buses are powered. In the system shown in
Figure 6-1, there are three different ways in which a bus can be powered, so there are three
topologies for each zone:
Zone 1
• Topology 1: Bus 1 powered by source at M1 (or not powered)
• Topology 2: Bus 1 powered by source at M2
• Topology 3: Bus 1 powered by sources at M1 and M2
Zone 2
• Topology 1: Bus 2 powered by source at M2 (or not powered)
• Topology 2: Bus 2 powered by source at M1
• Topology 3: Bus 2 powered by sources at M1 and M2
This topology definition is summarized in the Table 6-1 below. Entellisys refers to this table as
the Association Matrix.
NOTE: Bus 1 in Zone 1 is always powered by the source connected to circuit breaker M1 (or is
unpowered), except for the following two cases:
Case 1: The circuit breaker M1 (Topology Circuit Breaker 1) is open and circuit breakers M2
(Topology Circuit Breaker 2) and T1 (Topology Circuit Breaker 3) are closed. In this case Bus 1 is
powered by the source connected to M2. For that row in the Association Matrix, the Topology for
Zone 1 is therefore 2.
Case 2: All three topology circuit breakers are closed, in which case Bus 1 is powered by the
sources connected to M1 and M2, in parallel. For that row in the Association Matrix, the
Topology for Zone 1 is therefore 3. For Zone 1, all other rows in the Association Matrix are set to
1. A similar analysis applies to Zone 2.
Table 6-1 Association Matrix
T1 M2 M1 Zone 1 Topology Zone 2 Topology
Open Open Open 1 1
Open Open Closed 1 1
Open Closed Open 1 1
Open Closed Closed 1 1
Closed Open Open 1 1
Closed Open Closed 1 2
Closed Closed Open 2 1
Closed Closed Closed 3 3