SMA SC 500HE-20 Installation - Manual (Page 39)

SMA Solar Technology AG 9 AC and DC Connection
Installation Manual SCxxxHE-20-IA-IEN111210 39
9.4 Cable Connection
9.4.1 Requirements
Cable
• Only use copper or aluminum cables.
• AC cables are designed to carry maximum voltages of 1 450 V to ground and an effective
value of 800 V.
• Connect a maximum of 2 DC cables to each fuse input.
Terminal lugs
• Only use tin-plated crimp-type terminal lugs.
• The width of the terminal lugs must exceed the washer diameter (32 mm). This will ensure that
the defined torques are effective over the whole surface.
9.4.2 Cleaning the contact surfaces of terminal lugs and
connection lugs
1. Clean the contact surfaces with a clean cloth and ethanol cleaner.
2. Clean the contact surfaces with the non-woven abrasive included in the delivery until they have
a slight metallic shine. Avoid damage to the coated contact surfaces.
3. Remove metal dust with a clean cloth and ethanol cleaner.
4. Do not touch the contact surfaces again after cleaning.