Abstract: The invention relates to a switching device for short-circuiting and earthing at least two phases in an electric power network. The device comprises a first phase contact, a second phase contact, and an earthed, movable contact, which can, on the one hand, assume a first position, where the contact is insulated from the phases, and, on the other hand, a second position, where the contact is connected to the phase contacts and thereby earths and short-circuits the phases.

Abstract: The invention relates to a switching device for short-circuiting and earthing at least two phases in an electric power network. The device comprises a first phase contact, a second phase contact, and an earthed, movable contact, which can, on the one hand, assume a first position, where the contact is insulated from the phases, and, on the other hand, a second position, where the contact is connected to the phase contacts and thereby earths and short-circuits the phases.

Abstract: A power switch disposed in a housing includes a contact breaker configured to connect and disconnect a low-voltage switchgear from a power source supplying the low-voltage switchgear, a triggering device configured to disconnect the low-voltage switchgear in an overload event, a current detection device, a control device, a first evaluation device configured to evaluate an accidental arc overcurrent, and a second evaluation device configured to evaluate the accidental arc overcurrent. The power switch is configured to be activated via an overcurrent signal generated by an arc monitoring system in response to the accidental arc overcurrent. The overcurrent signal is linked to the at least one triggering signal. The second evaluation has a threshold above a threshold of the first evaluation device. The triggering device is configured to be activated via a turn-off pulse when a signal from the current detection device is above the threshold of the second evaluation device.

Abstract: A power switch disposed in a housing includes a contact breaker configured to connect and disconnect a low-voltage switchgear from a power source supplying the low-voltage switchgear, a triggering device configured to disconnect the low-voltage switchgear in an overload event, a current detection device, a control device, a first evaluation device configured to evaluate an accidental arc overcurrent, and a second evaluation device configured to evaluate the accidental arc overcurrent. The power switch is configured to be activated via an overcurrent signal generated by an arc monitoring system in response to the accidental arc overcurrent. The overcurrent signal is linked to the at least one triggering signal. The second evaluation has a threshold above a threshold of the first evaluation device. The triggering device is configured to be activated via a turn-off pulse when a signal from the current detection device is above the threshold of the second evaluation device.