Dimensioning and protection of control circuits

On-demand webinar

Contemporary primary and secondary protection

Dimensioning and protection of control circuits

Whether robust electromechanics or highly sensitive electronics, all 24 V DC consumers are often supplied by a single regulated switched-mode power supply. To prevent faults at a single consumer from paralyzing the entire system, the control circuit is divided into individual branches and selectively fused.

  • Requirements for the primary and secondary connection
  • Reduced short-circuit current in the control circuit
  • Tripping characteristics of miniature circuit breakers, circuit breakers for equipment and selectivity modules
A technician connects wires to a Siemens control module within an electrical panel, demonstrating work on primary and secondary circuit protection.