Starting resistors protect electrical components, motors and machines. Without a starting resistor, the starting current responsible for the movement would be more than 7 times the normal rated current. High starting currents lead to serious repercussions on the supply network and can cause damage to electrical components, motors and machines. Starting resistors are connected to the rotor circuit to start three-phase motors with slip ring rotors or DC motors and switched off again in stages.

In addition, the starting resistor enables a soft start, which protects electrical and mechanical components. Liquid starters limit the starting current and are preferably used where a very high starting torque is required. The robust design guarantees high operational reliability and a long service life in the most difficult environments.