Connecting The Inverter To The Utility Grid - SMA 5000TL Operating Manual

6 Electrical Connection
Overvoltage category:
The inverter can be used in grids of overvoltage category III or lower in accordance with
IEC 60664-1. That means that the inverter can be permanently connected to the grid-connection
point of a building. In case of installations with long outdoor cabling routes, additional measures to
reduce overvoltage category IV to overvoltage category III are required (see the Technical
Information "Overvoltage Protection" at www.SMA-Solar.com).
6.3.2

Connecting the Inverter to the Utility Grid

Requirements:
☐ The connection requirements of the grid operator must be met.
☐ The grid voltage must be in the permissible range. The exact operating range of the inverter is
specified in the operating parameters.
Procedure:
1. Disconnect the circuit breaker from all three line conductors and secure against reconnection.
2. Unscrew all six screws of the enclosure lid using an Allen key (AF 5) and remove the enclosure
lid. Ensure that the conical spring washers are retained.
3. Remove the adhesive tape from the enclosure opening for the AC cable.
4. Attach the M32x1.5 cable gland to the enclosure opening for the AC cable using a counter
nut.
5. Route the AC cable into the inverter through the cable gland. If necessary, slightly loosen the
swivel nut of the cable gland.
6. Dismantle the AC cable.
7. Shorten L1, L2, L3 and N by 5 mm each.
8. Strip 18 mm of the insulation from each of L1, L2, L3, N and the grounding conductor.
9. Push the safety levers of the AC connecting terminal plate right up to the stop.
10.
Risk of fire if two conductors are connected to one terminal
If you connect two conductors to a terminal, a fire can occur due to a bad electrical
connection.
• Never connect more than one conductor per terminal.
11. Connect PE, N, L1, L2 and L3 to the connecting terminal plate for the AC cable according to
the labeling. The direction of the rotating magnetic field of L1, L2 and L3 is not relevant.
30 STP5-12TL-20-BE-en-15
SMA Solar Technology AG
Operating Manual