The PV strings are installed in the same way as all other Phoenix Contact SCBs. During planning, you only need to take into account a 230 V AC power supply for the motorized fire department switch.
The control of the fire department switch is...
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The PV strings are installed in the same way as all other Phoenix Contact SCBs. During planning, you only need to take into account a 230 V AC power supply for the motorized fire department switch.
The control of the fire department switch is designed as an undervoltage release. This means that the DC circuits are closed when the 230 V AC power supply is applied. Interrupting or shutting down the 230 V AC power supply results in the DC circuits opening. Two unused terminal points per conductor (L+N) and two cable glands for cable entry are available on the SCB for connecting the AC power supply. This allows you to loop through the AC power supply from SCB to SCB.
Observe the maximum permissible connection cross-sections and the line protection for the 230 V AC power supply as well as the increasing nominal currents with several SCBs or motorized fire department switches on a common AC power supply.
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