SMA SUNNY BOY 1.5 - Connecting the Inverter to the Utility Grid

Safety in accordance with IEC62109 when the grounding conductor monitoring is
deactivated
In order to guarantee safety in accordance with IEC62109 when the grounding conductor
monitoring is deactivated, you have to connect additional grounding:
• In order to guarantee safety in accordance with IEC62109 when the grounding
conductor monitoring is deactivated, you have to connect additional grounding (see
Section6.3.3, page29): The additional grounding conductor must have the same cross-
section as the connected grounding conductor at the connecting terminal plate for the AC
cable. This prevents touch current if the grounding conductor at the connecting terminal
plate for the AC cable fails.
Connection of additional grounding
In some countries, additional grounding is generally required. In each case, observe the
locally applicable regulations.
• If additional grounding is required, connect an additional grounding that has at least the
same cross-section as the connected grounding conductor to the connecting terminal
plate for the AC cable (see Section6.3.3, page29). This prevents touch current if the
grounding conductor at the connecting terminal plate for the AC cable fails.
6.3.2 Connecting the Inverter to the Utility Grid
Requirements:
☐ Only the connecting terminal plate supplied may be used for the AC connection.
☐ 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 AC circuit breaker and secure it against reconnection.
2. Unscrew the swivel nut from the cable gland for
the AC connection at the connector cap.
3. Thread the swivel nut over the AC cable.
6 Electrical Connection
SMA Solar Technology AG
Operating Manual 27SB15-25-1VL-40-BE-en-11