From c57ad65bc73be3076d43fca08864dd6cf81b9791 Mon Sep 17 00:00:00 2001
From: Sahas Subramanian <sahas.subramanian@proton.me>
Date: Tue, 31 Mar 2026 11:16:09 +0200
Subject: [PATCH 1/2] Hide unconnected breakers from component graph

Signed-off-by: Sahas Subramanian <sahas.subramanian@proton.me>
---
 src/frequenz/gridpool/_graph_generator.py | 25 +++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/frequenz/gridpool/_graph_generator.py b/src/frequenz/gridpool/_graph_generator.py
index b309ee3..185fea2 100644
--- a/src/frequenz/gridpool/_graph_generator.py
+++ b/src/frequenz/gridpool/_graph_generator.py
@@ -3,8 +3,11 @@
 
 """Formula generation from assets API component/connection configurations."""
 
+import logging
+
 from frequenz.client.assets import AssetsApiClient
 from frequenz.client.assets.electrical_component import (
+    Breaker,
     ComponentConnection,
     ElectricalComponent,
 )
@@ -12,6 +15,8 @@
 from frequenz.client.common.microgrid.electrical_components import ElectricalComponentId
 from frequenz.microgrid_component_graph import ComponentGraph
 
+_logger = logging.getLogger(__name__)
+
 
 class ComponentGraphGenerator:
     """Generates component graphs for microgrids using the Assets API."""
@@ -57,6 +62,26 @@ async def get_component_graph(
         if any(c is None for c in connections):
             raise ValueError("Failed to load all electrical component connections.")
 
+        breakers = [c for c in components if isinstance(c, Breaker)]
+        connected_breakers = [
+            b
+            for b in breakers
+            if any(
+                b.id in (c.source, c.destination) for c in connections if c is not None
+            )
+        ]
+
+        if connected_breakers:
+            _logger.warning(
+                "The following breakers are connected to other components, "
+                + "which is not supported by the component graph generator and may "
+                + "lead to graph traversal issues: %s",
+                [b.id for b in connected_breakers],
+            )
+        elif breakers:
+            _logger.debug("Dropping unconnected breakers: %s", [b.id for b in breakers])
+            components = [c for c in components if not isinstance(c, Breaker)]
+
         graph = ComponentGraph[
             ElectricalComponent, ComponentConnection, ElectricalComponentId
         ](components, connections)

From 8cf5bcc8500e65541f7efac77533917004e0230d Mon Sep 17 00:00:00 2001
From: Sahas Subramanian <sahas.subramanian@proton.me>
Date: Tue, 31 Mar 2026 11:20:34 +0200
Subject: [PATCH 2/2] Update release notes

Signed-off-by: Sahas Subramanian <sahas.subramanian@proton.me>
---
 RELEASE_NOTES.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 6f30afe..4d0613b 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -10,7 +10,7 @@
 
 ## New Features
 
-<!-- Here goes the main new features and examples or instructions on how to use them -->
+- If there are unconnected breakers at a site, they are now hidden from the component graph.  If there are breakers with connections to other components, they are still sent to the component graph.  This is a temporary measure until the graph traversal supports breakers.
 
 ## Bug Fixes