Input-distributing device (hereinafter referred to as IAD) is designed for input, metering and distribution of electrical energy in three-phase networks with a voltage of 380/220V frequency of 50/60 Hz with a solidly earthed neutral, as well as provides protection of outgoing lines from overload and short-circuit currents. Switchgears are installed in residential, public and industrial buildings, as well as in individual houses and cottages. Switchgear can be single panel or multi-panel.
The switchgear is a combination of low-voltage switching devices with control, protection and regulation devices. Switchgear protected version are boxes frameless or cabinets frame construction, in which the panels with equipment are built in. In the lower part of the structure are located busbars N and PE, to connect, respectively, the external zero working and zero protective conductors.
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