Dc Connection; Requirements For The Dc Connection - SMA 5000TL Operating Manual

6 Electrical Connection
Procedure:
1. When connecting to the utility grid, fuse the multifunction relay with a separate circuit breaker.
2.
Danger to life due to high voltages
• Ensure that the inverter is disconnected from all voltage sources (see Section 10,
page 57).
3. Prepare the cable:
• Dismantle the cable by no more than 15 mm.
• Strip off the conductor insulation by max. 8 mm.
4. Prepare the cable gland M25 for the connection to the multifunction relay as follows:
• Remove the swivel nut from the cable gland and remove the filler plug.
• Remove the one-hole cable support sleeve from the cable gland and insert the cable into
the one-hole cable support sleeve.
• Press the one-hole cable support sleeve with the cable into the cable gland and lead the
cable into the inverter.
• Screw the swivel nut onto the cable gland.
5. Remove the protective cover of the multifunction relay.
6. Depending on the operating mode, connect the cable to the connecting terminal plate for the
connection to the multifunction relay in accordance with the circuit diagram (see Section 6.4.3,
page 32).
7.
Danger to life due to live cables
If, during inverter operation, an insulated conductor (L1, L2 or L3) becomes detached from the
AC terminal, there is a risk of the multifunction relay cables being live. Touching the cables can
cause fatal electric shock.
• Reattach the protective cover to the multifunction relay. This isolates the AC connection
area in the inverter from other terminals.
8. Tighten the swivel nut of the cable gland.
6.5

DC Connection

6.5.1

Requirements for the DC Connection

Requirements for the PV modules per input:
☐ All PV modules must be of the same type.
☐ All PV modules must be aligned and tilted identically.
☐ On the coldest day based on statistical records, the open-circuit voltage of the PV array must
never exceed the maximum input voltage of the inverter.
38 STP5-12TL-20-BE-en-15
SMA Solar Technology AG
Operating Manual