diff --git a/src/components/generic-filter.js b/src/components/generic-filter.js
index 08305b9..26a3606 100644
--- a/src/components/generic-filter.js
+++ b/src/components/generic-filter.js
@@ -238,6 +238,7 @@ const equipmentsDefinition = {
             nominalVoltage: {
                 name: 'nominalVoltage',
                 type: filteredTypes.range,
+                occurs: 2,
             },
             substationName: {
                 name: 'substationName',