Connection of limit states (heavy element)
When an inductive circuit is broken, a voltage occurs that can be more than twice the operating voltage in the case of alternating current and in the case of direct current up to 10 times. the operating voltage. Furthermore, there is virtually never a “distinct and absolute” break in the circuit. This means that repeated breaks of the circuit occur. The voltage spike can cause a current surge through the tongue element and destroy it.
Lämpliga skydd för tungelementen återfinns på t.ex. ELFA