Protection against lightning
To prevent unforeseen situations during a thunderstorm, it is necessary to establish lightning protection and inside the house. For this, electric shields in the house are supplied with additional devices — modular devices. They will prevent overstrain in the mains. Steppervisor limiters (OPN) are similar to standard circuit breakers, which are automatically disconnected. The difference is that the OPN does not have a shutdown lever. The device is mounted between the phase or between the zero wire and grounding. What happens when a super -flow enters the electric network? Overvoltage occurs in the network, but thanks to the OPN, the load is redistributed and excess energy goes through the zero protective conductor (re) to the ground.