A contactor is an electromagnetically operated remote switch for high electrical powers. A low current can be used to switch a larger current. They ensure a galvanic separation between the control circuit and the connected electric circuit. Installation contactors in series HS for installation in distribution boards are extremely quiet and have very low-noise switching processes, are highly versatile thanks to their utilization categories and have a long mechanical and electrical service life. The magnetic coil of this series is suitable for continuous operation (100% duty cycle).