diff --git a/src/controller/model_utils/signal_reducer.rs b/src/controller/model_utils/signal_reducer.rs
index 17c198e..b497899 100644
--- a/src/controller/model_utils/signal_reducer.rs
+++ b/src/controller/model_utils/signal_reducer.rs
@@ -1,6 +1,10 @@
 #[allow(non_snake_case)]
 pub fn reactive_resistance_of_capacitor(Cm: f64, L: f64, f: f64) -> f64 {
-    1f64 / (2f64 * std::f64::consts::PI * f * Cm * L)
+    if f == 0.0 || Cm == 0.0 || L == 0.0 {
+        0.0
+    } else {
+        1f64 / (2f64 * std::f64::consts::PI * f * Cm * L)
+    }
 }
 
 #[allow(non_snake_case)]
@@ -10,10 +14,18 @@ pub fn full_resistance_of_capacitor(Xc: f64, Rs: f64, Rm: f64, L: f64) -> f64 {
 
 #[allow(non_snake_case)]
 pub fn voltage_from_signal_source(Vs: f64, Xc: f64, Z: f64) -> f64 {
-    (Vs * Xc) / Z
+    if Z == 0.0 {
+        0.0
+    } else {
+        (Vs * Xc) / Z
+    }
 }
 
 #[allow(non_snake_case)]
 pub fn coef_of_signal_reduce(Vs: f64, V: f64) -> f64 {
-    Vs / V
+    if V == 0.0 {
+        0.0
+    } else {
+        Vs / V
+    }
 }