SMA SMB - Manual (Page 24)

6 Electrical Connection SMA Solar Technology AG
24 SMB-IA-en-10 Installation Manual
6.3 Connecting the DC Input Cables
Requirements:
☐ The correct conductor cross-section for the DC input cables has been selected.
☐ The DC sub-distributions are switched off.
1. Strip 35 mm insulation off the DC input cables.
2. Fit suitable terminal lugs to the DC input cables (see Section 10 "Technical Data", page 29).
3. Lead the DC input cables through cable glands into the enclosure interior. Make sure polarity
is correct.
4. Tighten the cable glands.
5. Connect the DC input cables to bolt clamps (torque: 30 Nm … 35 Nm).
6. Ensure that the DC input cables are securely in place.
6.4 Connecting the Earth Cable
Requirement:
☐ Earth cable cross-section: at least 16 mm
2
1. Strip the earth cable by 16 mm.
2. Fit suitable terminal lugs to the earth cable (see Section 10 "Technical Data", page 29).
3. Lead the earth cable through a cable gland into the enclosure interior.
4. Tighten the cable gland.
5. Connect the earth cable to the earthing bolts (torque: 14 Nm).
6. Ensure that the earth cable is securely in place.
7. Earth the earth cable in the vicinity of the Sunny Main Box or Sunny Main Box Cabinet, for
example, with an earth rod.
%"/(&3
Lethal electric shock due to live voltage
High voltage is present in the DC sub-distributions. Failure to adhere to safety warnings may lead to
severe or lethal injuries from electric shock.
• Observe all safety rules.
– Disconnect
– Ensure that the device cannot be reconnected
– Check that no voltage is present
– Earth and short-circuit
– Cover or shield any adjacent live components.