7 Preparing for Commissioning
SMA Solar Technology AG
Operating manual
NA-BOX-12-3-20-BE-en-12
22
7
Preparing for Commissioning
CAUTION
Injury to persons or property damage due to unauthorized access to the grid and PV system
protection of the NA-Box
Unauthorized access or incorrect settings on the grid and PV system protection device in the NA-Box can cause grid
failures, yield losses, damage to the multicluster system or the NA-Box and injuries to persons. Furthermore, the
operating licence may also be revoked.
• Prior to commissioning the NA-Box, secure the grid and PV system protection device against unauthorized
access. The password protection must be activated on the grid and PV system protection device (see grid and
PV system protection documentation).
• Only operate the NA-Box when the grid and PV system protection device is secured against unauthorized
access.
Requirements:
☐ The NA-Box must be correctly mounted (see Section 5, page 14).
☐ All cables must be correctly connected (see Section 6, page 18).
☐ All cables must be tightly enclosed by a membrane or cable feed-through in the floor of the NA-Box.
☐ All power cables must be secured inside or outside the NA-Box.
☐ The floor of the NA-Box must be closed with the base plates (see Section 9.2, page 25). All seals at the base
plates must be correctly positioned.
Procedure:
1. Ensure that the power cables are secured with a strain relief.
2. Insert the kick plates and attach with the fastening screws (TX 30, torque: 12 Nm).
3. Mount the protective cover (see Section 9.5, page 28).
4. Close NA-Box.
5. Ensure that the requirements for commissioning the Multicluster-Box are fulfilled (see Multicluster-Box operating
manual).
