SMA SC 500CP XT Installation - Manual (Page 22)

Risk of fire due to failure to observe torque specifications on live bolted connections
Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances
increase. This can cause components to overheat and catch fire.
• Ensure that live bolted connections are always tightened with the exact torque specified in this document.
• When working on the device, use suitable tools only.
• Avoid repeated tightening of live bolted connections as this may result in inadmissibly high torques.
Danger to life due to arc fault caused by damaged connection busbars
If excessive force is exerted while connecting the cables, the connection busbars can be bent or damaged. This will
lead to reduced clearances and creepage distances. Reduced clearances and creepage distances can lead to arc
faults.
• Cut the cables to the correct length and prepare them for connection.
• Position the terminal lugs on the connection busbars ensuring a large contact surface.
• Tighten to the specified torque.
DC-side disconnection
The DC main distributions and DC subdistributions should be equipped with load-break switches or circuit
breakers. Load-break switches or circuit breakers enable trouble-free DC-side disconnection of the inverter.
5.2 Preparing the Installation
5.2.1 Replacing the Desiccant Bag in the Inverter
Desiccant bag in the inverter cabinet
The desiccant bag in the inverter cabinet protects the electronic components from moisture. The desiccant bag
must be replaced by a new desiccant bag included in the scope of delivery one day before commissioning.
Procedure:
1. Remove and dispose of the desiccant bag located under the inverter bridges.
2. Remove the desiccant bag included in the scope of delivery from the foil and position it under the inverter bridges.
5.2.2 Mounting the Ventilation Plate
The guide rails for the ventilation plate are located in the floor area of the inverter cabinet.
Procedure:
• Slide the ventilation plate into the guide rails in the inverter cabinet. The ventilation grid in the ventilation plate
should be facing the rear panel.
☑ The ventilation plate is flush with the inverter.
✖ The ventilation plate will not go all the way in?
• Grip the ventilation plate from underneath and press the middle part upwards while sliding it in.
5 Installation SMA Solar Technology AG
Operating Manual SCCPXT-IA-E4-en-44 22