Connecting a Rapid Shutdown Initiator to the Digital Input GSI

Qualified person

The DC disconnect switch of the inverter acts as the rapid shutdown initiator. To connect the SMA Rapid Shutdown Initiator (RSI-US-50) as an additional external rapid shutdown initiator, follow the instructions below. Following connection, both the DC load-break switch of the inverter and the external rapid shutdown initiator can be used. In systems with multiple inverters, the DC load-break switch of one inverter does not disconnect the other inverters in the system.

Requirements:

  • The cable for connecting the external rapid shutdown initiator must be pre-assembled.

  • The external rapid shutdown initiator must be mounted (see manual for the rapid shutdown initiator).

Additionally required material (not included in the scope of delivery):

  • 1 conduit (trade size: 19.05 mm (0.75 in) or smaller with suitable reducer bush)

  • Sealing compound for sealing the join between the conduit and inverter if a weep hole has been added to the conduit

  • 1 rain-tight conduit fitting or conduit fitting for wet locations complying with UL 514B (trade size: 19.05 mm (0.75 in) or smaller with suitable reducing bush)

Procedure:

  1. Disconnect the inverter from all voltage sources ( > Disconnecting the Inverter from Voltage Sources).
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  2. Unplug the 2-pole connector to which the DC load-break switch is connected from the GSI slot.
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  3. Insert the adapter included in the scope of delivery of the SMA Rapid Shutdown Initiator into the GSI connector.
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  4. Plug the 2-pole connector to which the DC load-break switch is connected into a slot on the adapter.
  5. Remove the filler plug from the middle enclosure opening.
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  6. Insert a conduit fitting in the center enclosure opening and tighten with the counter nut from the inside.
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  7. Run the cable for connecting the external rapid shutdown initiator through the conduit into the inverter and attach the conduit to the conduit fitting.
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  8. Plug a 2-pole connector from the scope of delivery of the SMA Rapid Shutdown Initiator into the second slot on the adapter.
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  9. Attach the conductors for the rapid shutdown initiator to the 2-pole terminal block.
  10. Tug lightly to ensure that the conductors are secured in the terminals.
  11. If a weep hole has been added to the conduit, seal the conduit with sealing compound.
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  12. Switch on the rapid shutdown initiator.
  13. Make further connections.
  14. Commission the inverter.

    Also see:

    Connection of Several Inverters to a Rapid Shutdown Initiator
    Mounting the WLAN Antenna