diff --git a/iidm/iidm-impl/src/main/java/com/powsybl/iidm/network/impl/NodeBreakerVoltageLevel.java b/iidm/iidm-impl/src/main/java/com/powsybl/iidm/network/impl/NodeBreakerVoltageLevel.java
index a9b283e99f2..9de68df1721 100644
--- a/iidm/iidm-impl/src/main/java/com/powsybl/iidm/network/impl/NodeBreakerVoltageLevel.java
+++ b/iidm/iidm-impl/src/main/java/com/powsybl/iidm/network/impl/NodeBreakerVoltageLevel.java
@@ -388,6 +388,8 @@ BusExt getConnectableBus(int node) {
             BusExt[] connectableBus2 = new BusExt[1];
             graph.traverse(node, (v1, e, v2) -> {
                 if (connectableBus2[0] != null) {
+                    // traverse does not stop the algorithm when TERMINATE, it only stops searching in a given direction
+                    // this condition insures that while checking all the edges (in every direction) of a node, if a bus is found, it will not be lost
                     return TraverseResult.TERMINATE;
                 }
                 connectableBus2[0] = getBus(v2);