diff --git a/open-reac/src/main/resources/openreac/reactiveopf.run b/open-reac/src/main/resources/openreac/reactiveopf.run
index a7f05e5b..56eac450 100644
--- a/open-reac/src/main/resources/openreac/reactiveopf.run
+++ b/open-reac/src/main/resources/openreac/reactiveopf.run
@@ -548,7 +548,7 @@ for {(qq,m,n) in BRANCHCC_REGL: regl_ratio_min[1,branch_ptrRegl[1,qq,m,n]] <= te
 }
 # Looking for unconsistencies
 let tempo := 0; # If non zero, major inconsistency detected
-for {(qq,m,n) in BRANCHCC_REGL} {
+for {(qq,m,n) in BRANCHCC_REGL: substation_Vnomi[1,bus_substation[1,m]] > 30 and substation_Vnomi[1,bus_substation[1,n]] > 30} {
   let temp1 := regl_ratio_min[1,branch_ptrRegl[1,qq,m,n]];
   let temp2 := regl_ratio_max[1,branch_ptrRegl[1,qq,m,n]];
   if voltage_lower_bound[1,bus_substation[1,m]]*temp1*branch_cstratio[1,qq,m,n] > voltage_upper_bound[1,bus_substation[1,n]]
@@ -585,7 +585,7 @@ for {(qq,m,n) in BRANCHCC_REGL} {
   }
 }
 # Consistency for transformers with fixed ratio
-for {(qq,m,n) in BRANCHCC_REGL_FIX} {
+for {(qq,m,n) in BRANCHCC_REGL_FIX: substation_Vnomi[1,bus_substation[1,m]] > 30 and substation_Vnomi[1,bus_substation[1,n]] > 30} {
   let temp1 := tap_ratio[1,regl_table[1,branch_ptrRegl[1,qq,m,n]],regl_tap0[1,branch_ptrRegl[1,qq,m,n]]];
   if voltage_lower_bound[1,bus_substation[1,m]]*temp1*branch_cstratio[1,qq,m,n] > voltage_upper_bound[1,bus_substation[1,n]]
   then {