SMA SSM-U-1615 - Manual (Page 29)

Connecting the DC main cables to the busbar using terminal lugs(see Section 6.3.3, page 29
)
• DC main cable 70 mm 2 to 400 mm 2 made of aluminum or copper
– Aluminum cable: additionally required material: bimetal ring terminal lugs
– Copper cable: tin-plated copper ring terminal lugs are preassembled
Connecting the DC main cables to the busbar using V box terminals(see Section 6.3.4,
page 32)
• DC main cable 70 mm 2 to 300 mm 2 made of aluminum or copper
Additionally required material: V box terminals (see Section 6.3.4.1 "Requirements and
Conditions", page 32) (see Section 14, page 72)
6.3.3 Connecting the DC Main Cables to the Busbar using
Terminal Lugs
Cable requirements for connection with terminal lugs:
☐ Use copper or aluminum cables only.
☐ The cables must be designed for the maximum PV voltage.
☐ Maximum number of cables per potential: 2
☐ Permitted cable cross-section: 70 mm
2 to 400 mm 2
Terminal lug requirements:
☐ For the connection of copper cables, use only tin-plated copper tube terminal lugs.
☐ For the connection of aluminum cables, use only bimetal tube terminal lugs.
☐ For the connection, use only the screws, nuts and washers which are preassembled on the
busbar.
☐ The terminal lugs must be designed for the given temperature. Temperature: +95°C
☐ The width of the terminal lugs must exceed the washer diameter. Washer diameter: 32 mm.
This will ensure that the defined torques are effective over the whole surface.
☐ Maximum width of the terminal lugs when connecting two cables per potential: 48 mm.
If using cables with small cross-sections, the cable lugs can be installed next to each other.
If using cables with large cross-sections, the cable lugs must be installed one behind the other.
Additionally required mounting material (not included in the scope of delivery):
☐ For the connection of copper cables: tin-plated copper tube terminal lugs for screw size M12
☐ Clean cloth
☐ Ethanol cleaning agent
6 Installation SMA Solar Technology AG
Operating Manual 29 SSMUXX15-BE-en-10