diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 24cb4c1d0..c8d939ba1 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -28,10 +28,11 @@
     <select />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="aa3ee678-6e91-470f-91a9-09e9d8a4756d" name="Changes" comment="Added the bus None check to `grid_analysis`">
+    <list default="true" id="aa3ee678-6e91-470f-91a9-09e9d8a4756d" name="Changes" comment="CGMES: Adding the middle buses of the TR3">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/GridCalEngine/Devices/multi_circuit.py" beforeDir="false" afterPath="$PROJECT_DIR$/src/GridCalEngine/Devices/multi_circuit.py" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/GridCalEngine/Topology/topology.py" beforeDir="false" afterPath="$PROJECT_DIR$/src/GridCalEngine/Topology/topology.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/GridCal/Gui/Diagrams/MapWidget/Branches/map_line_container.py" beforeDir="false" afterPath="$PROJECT_DIR$/src/GridCal/Gui/Diagrams/MapWidget/Branches/map_line_container.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/GridCal/Gui/Diagrams/MapWidget/grid_map_widget.py" beforeDir="false" afterPath="$PROJECT_DIR$/src/GridCal/Gui/Diagrams/MapWidget/grid_map_widget.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/GridCal/Gui/Diagrams/MapWidget2/map_widget.py" beforeDir="false" afterPath="$PROJECT_DIR$/src/GridCal/Gui/Diagrams/MapWidget2/map_widget.py" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -113,7 +114,7 @@
     "Git.Branch.Popup.ShowAllRemotes": "true",
     "MATLAB_INTERPRETER": "/usr/local/MATLAB/R2018a/bin/matlab",
     "Python tests.pytest in tests.executor": "Run",
-    "Python.ExecuteGridCal.executor": "Debug",
+    "Python.ExecuteGridCal.executor": "Run",
     "Python.update_gui_file.executor": "Run",
     "RunOnceActivity.OpenProjectViewOnStart": "true",
     "RunOnceActivity.ShowReadmeOnStart": "true",
@@ -571,7 +572,7 @@
       <option name="_new_targetType" value="&quot;PYTHON&quot;" />
       <method v="2" />
     </configuration>
-    <configuration name="pytest in cgmes_raw_cross_imp_exp_test.py" type="tests" factoryName="py.test" temporary="true" nameIsGenerated="true">
+    <configuration name="pytest in /home/santi/Documentos/Git/GitHub/GridCal/src/tests/cgmes_raw_cross_validation/cgmes_raw_cross_imp_exp_test.py" type="tests" factoryName="py.test" temporary="true" nameIsGenerated="true">
       <module name="GridCal" />
       <option name="ENV_FILES" value="" />
       <option name="INTERPRETER_OPTIONS" value="" />
@@ -609,16 +610,16 @@
     </configuration>
     <list>
       <item itemvalue="Python.ExecuteGridCal" />
+      <item itemvalue="Python tests.pytest in /home/santi/Documentos/Git/GitHub/GridCal/src/tests/cgmes_raw_cross_validation/cgmes_raw_cross_imp_exp_test.py" />
       <item itemvalue="Python tests.pytest in tests" />
       <item itemvalue="Python tests.pytest for test_grid_diff.test_add_stuff_roundtrip" />
       <item itemvalue="Python tests.pytest for test_power_flow.test_controllable_shunt" />
-      <item itemvalue="Python tests.pytest in cgmes_raw_cross_imp_exp_test.py" />
     </list>
     <recent_temporary>
       <list>
         <item itemvalue="Python.ExecuteGridCal" />
         <item itemvalue="Python tests.pytest in tests" />
-        <item itemvalue="Python tests.pytest in cgmes_raw_cross_imp_exp_test.py" />
+        <item itemvalue="Python tests.pytest in /home/santi/Documentos/Git/GitHub/GridCal/src/tests/cgmes_raw_cross_validation/cgmes_raw_cross_imp_exp_test.py" />
         <item itemvalue="Python tests.pytest for test_power_flow.test_controllable_shunt" />
         <item itemvalue="Python tests.pytest for test_grid_diff.test_add_stuff_roundtrip" />
       </list>
@@ -1609,7 +1610,7 @@
       <option name="project" value="LOCAL" />
       <updated>1706010683113</updated>
     </task>
-    <option name="localTasksCounter" value="438" />
+    <option name="localTasksCounter" value="439" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -1655,7 +1656,6 @@
     </option>
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="Improved the LinearMultiContingencies update function which was likely missing operations" />
     <MESSAGE value="Added the roseta figures&#10;minor refactor" />
     <MESSAGE value="Fixed bug when setting the file label for when loading many CIM files&#10;&#10;Minor refactoring" />
     <MESSAGE value="5.0.3 - light refactoring of some functions" />
@@ -1680,7 +1680,8 @@
     <MESSAGE value="Improved the drag&amp;drop of substations into the map (WIP)" />
     <MESSAGE value="Fixed save_excel that now exports the legacy system" />
     <MESSAGE value="Added the bus None check to `grid_analysis`" />
-    <option name="LAST_COMMIT_MESSAGE" value="Added the bus None check to `grid_analysis`" />
+    <MESSAGE value="CGMES: Adding the middle buses of the TR3" />
+    <option name="LAST_COMMIT_MESSAGE" value="CGMES: Adding the middle buses of the TR3" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
@@ -2528,13 +2529,13 @@
     <SUITE FILE_PATH="coverage/GridCal$node_groups_run.coverage" NAME="node_groups_run Coverage Results" MODIFIED="1707392255868" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/examples" />
     <SUITE FILE_PATH="coverage/GridCal$newton_equivalence_utils.coverage" NAME="newton_equivalence_utils Coverage Results" MODIFIED="1687725154112" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/tests" />
     <SUITE FILE_PATH="coverage/GridCal$update_gui_all.coverage" NAME="update_gui_all Coverage Results" MODIFIED="1696580506087" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/GridCal/Gui" />
-    <SUITE FILE_PATH="coverage/GridCal$ExecuteGridCal.coverage" NAME="ExecuteGridCal Coverage Results" MODIFIED="1719519740944" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/GridCal" />
+    <SUITE FILE_PATH="coverage/GridCal$ExecuteGridCal.coverage" NAME="ExecuteGridCal Coverage Results" MODIFIED="1719523218100" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/GridCal" />
     <SUITE FILE_PATH="coverage/GridCal$MVRSM_mo.coverage" NAME="MVRSM_mo Coverage Results" MODIFIED="1707735080331" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/trunk/MVRSM" />
     <SUITE FILE_PATH="coverage/GridCal$graph_save2.coverage" NAME="graph_save2 Coverage Results" MODIFIED="1702996105426" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/GridCalEngine/IO/rdf_test" />
     <SUITE FILE_PATH="coverage/GridCal$Nosetests_in_test_latin_hypercube_py.coverage" NAME="Nosetests in test_latin_hypercube.py Coverage Results" MODIFIED="1708506956216" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/tests" />
     <SUITE FILE_PATH="coverage/GridCal$controllable_shunt_editor.coverage" NAME="controllable_shunt_editor Coverage Results" MODIFIED="1718358432978" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/trunk/qt_related" />
     <SUITE FILE_PATH="coverage/GridCal$plexel_circuit.coverage" NAME="plexel_circuit Coverage Results" MODIFIED="1706090549808" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/trunk/plexel" />
-    <SUITE FILE_PATH="coverage/GridCal$pytest_in_tests.coverage" NAME="pytest in tests Coverage Results" MODIFIED="1719518159222" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/tests" />
+    <SUITE FILE_PATH="coverage/GridCal$pytest_in_tests.coverage" NAME="pytest in tests Coverage Results" MODIFIED="1719520335924" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/tests" />
     <SUITE FILE_PATH="coverage/GridCal$lightmap.coverage" NAME="lightmap Coverage Results" MODIFIED="1655892740020" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/research/map" />
     <SUITE FILE_PATH="coverage/GridCal$Nosetests_for_admittance_matrix_test_test3.coverage" NAME="Nosetests for admittance_matrix_test.test3 Coverage Results" MODIFIED="1706045531246" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/tests" />
     <SUITE FILE_PATH="coverage/GridCal$V1_refractored.coverage" NAME="V1_refractored Coverage Results" MODIFIED="1617214204840" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/src/research/PGD" />
diff --git a/src/GridCal/Gui/Diagrams/MapWidget/Branches/map_line_container.py b/src/GridCal/Gui/Diagrams/MapWidget/Branches/map_line_container.py
index 587ccd463..3627b9275 100644
--- a/src/GridCal/Gui/Diagrams/MapWidget/Branches/map_line_container.py
+++ b/src/GridCal/Gui/Diagrams/MapWidget/Branches/map_line_container.py
@@ -63,6 +63,16 @@ def __init__(self,
         self.enabled = True
         self.original = True
 
+    def setWidthScale(self, val: float):
+        """
+        Set the width scale of the line
+        :param val:
+        """
+        for segment in self.segments_list:
+            pen = segment.pen()  # get the current pen
+            pen.setWidthF(val)  # Set the fractional thickness of the line
+            segment.setPen(pen)  # Assign the pen to the line item
+
     def clean_segments(self) -> None:
         """
         Remove all segments from the scene
diff --git a/src/GridCal/Gui/Diagrams/MapWidget/grid_map_widget.py b/src/GridCal/Gui/Diagrams/MapWidget/grid_map_widget.py
index 38bc73025..c3ed16b50 100644
--- a/src/GridCal/Gui/Diagrams/MapWidget/grid_map_widget.py
+++ b/src/GridCal/Gui/Diagrams/MapWidget/grid_map_widget.py
@@ -22,7 +22,8 @@
 from collections.abc import Callable
 from PySide6.QtSvg import QSvgGenerator
 from PySide6.QtCore import (Qt, QSize, QRect, QMimeData, QIODevice, QByteArray, QDataStream, QModelIndex)
-from PySide6.QtGui import (QIcon, QPixmap, QImage, QPainter, QStandardItemModel, QStandardItem, QColor, QDropEvent)
+from PySide6.QtGui import (QIcon, QPixmap, QImage, QPainter, QStandardItemModel, QStandardItem, QColor, QDropEvent,
+                           QWheelEvent)
 
 from GridCalEngine.Devices.Diagrams.map_location import MapLocation
 from GridCalEngine.Devices.Substation import Bus
@@ -819,6 +820,26 @@ def dropEvent(self, event: QDropEvent):
                 self.circuit.add_substation(obj=api_object)
                 self.add_api_substation(api_object=api_object, lat=lat, lon=lon, r=0.01)
 
+    def wheelEvent(self, event: QWheelEvent):
+        """
+
+        :param event:
+        :return:
+        """
+        max_zoom = self.map.max_level
+        min_zoom = self.map.min_level
+        zoom = self.map.zoom_factor
+        scale = 0.1 + zoom / (max_zoom - min_zoom)
+
+        # rescale lines
+        for dev_tpe in [DeviceType.LineDevice,
+                        DeviceType.DCLineDevice,
+                        DeviceType.HVDCLineDevice,
+                        DeviceType.FluidPathDevice]:
+            graphics_dict = self.graphics_manager.get_device_type_dict(device_type=dev_tpe)
+            for key, lne in graphics_dict.items():
+                lne.setWidthScale(scale)
+
     def change_size_and_pen_width_all(self, new_radius, pen_width):
         """
         Change the size and pen width of all elements in Schema.
diff --git a/src/GridCal/Gui/Diagrams/MapWidget2/map_widget.py b/src/GridCal/Gui/Diagrams/MapWidget2/map_widget.py
index ae92eb840..1f47701fd 100644
--- a/src/GridCal/Gui/Diagrams/MapWidget2/map_widget.py
+++ b/src/GridCal/Gui/Diagrams/MapWidget2/map_widget.py
@@ -755,6 +755,7 @@ def wheelEvent(self, event: QWheelEvent):
         """
         Handle a mouse wheel rotation.
         """
+        self.editor.wheelEvent(event)
 
     def resizeEvent(self, event: QResizeEvent = None, updateDiagram: bool = True):
         """