SMA GRID CONNECT BOX 12 - Manual (Page 20)

6 Electrical Connection SMA Solar Technology AG
20 GRID-BOX-12-3-20-BE-en-10 Operating Manual
Cable requirements:
☐ Conductor material: copper
☐ Conductor cross-section: 1.5 mm² to 2.5 mm²
Procedure:
1. Insert the control cables into the Grid Connect Box (see Section 9.3, page 25).
2. Connect the control cables to the spring-cage terminals (see Section 9.4.2, page 27).
• X310:1,2: block of grounding contactor of Multicluster Box
• X310:4,5: feedback from grid contactor of Grid Connect Box
• X311:1-4: voltage measurement of Grid Connect Box
• X311:6,7: block of generator contactor of Multicluster Box
• X311:8,9: block of grid contactor of Grid Connect Box
3. Ensure that the insulated conductors are firmly in place.
6.6 Mounting the Kick Plates
Requirement:
☐ All installation work must be completed.
Procedure:
1. Ensure that the power cables are retained with a strain relief.
2. Insert the kick plates and attach with the fastening screws (TX 30, torque: 12 Nm).
Ground connection at terminals X310 and X311
If the control cable between Multicluster Box and Grid Connect Box contains a grounding conductor, the grounding
conductor terminal must not be connected on both sides.