Connecting To Ground - SMA SUNNY STRING-MONITOR Technical Description

SMA Solar Technology AG
Procedure:
• Clean the contact surfaces of the terminal lugs
• Connecting the DC Main Cable
Clean the contact surfaces of the terminal lugs
1. Clean the contact surfaces with a clean cloth and ethanol cleaner.
2. Clean the contact surfaces with an abrasive fabric. Avoid damage to the coated contact
surfaces.
3. If the contact surfaces have a light metallic shine, then they are sufficiently cleaned.
4. Remove metal dust with a clean cloth and ethanol cleaner.
Connecting the DC Main Cable
1. Remove the filler-plugs from the cable glands.
2. Guide the DC main cable through the cable glands into the enclosure interior. Make sure
polarity is correct when doing this.
3. Fit the DC main cable with terminal lugs.
4. Connect the DC main cable to the bolt clamp.
Observe the correct polarity when doing this and
tighten the bolt clamp with 20 Nm torque.
5. Make sure the DC main cable sits firmly in place.
6. Tighten the cable glands.
5.6 Connecting to Ground
To guarantee the functionality of the integrated overvoltage protectors, they must be connected to an
external ground.
1. Remove the filler-plugs from the cable gland.
2. Guide the ground cable through the cable gland into the enclosure interior.
3. Strip the ground cable 14 mm.
4. Connect the ground cable to the ground terminal. Tighten the ground terminal to 3.5 Nm torque.
5. Tighten the cable gland.
6. Ground the grounding cable in the vicinity of the Sunny String-Monitor, for example, with a
ground rod.
Technical Description
5 Electrical Connection
SSM-TEN103132 27