SMA MULTICLUSTER BOX 12 - Manual (Page 25)

SMA Solar Technology AG 6 Electrical Connection
Operating Manual MC-BOX-12-3-20-BE-en-10 25
Procedure:
1. Insert the control cables into the Multicluster Box (see Section 9.3.1, page 31).
2. Connect the control cables to the spring-cage terminals X107 (see Section 9.4.2, page 35). Make sure that the
poling of the terminals is correct.
6.9.4 Connecting the Control Cables to the Grid Connect Box
Cable requirements:
☐ Conductor material: copper
☐ Conductor cross-section: 1.5 mm² to 2.5 mm²
Procedure:
1. Insert the control cables into the Multicluster Box (see Section 9.3.1, page 31).
2. Connect the control cables to the spring-cage terminals (see Section 9.4.2, page 35).
• X110:1,2: block of grounding contactor of Multicluster Box
• X110:3,4: feedback from grid contactor of Grid Connect Box
• X111:1-4: voltage measurement of Grid Connect Box
• X111:6,7: block of generator contactor of Multicluster Box
• X111:8,9: block of grid contactor of Grid Connect Box
3. Ensure that the insulated conductors are firmly in place.
6.9.5 Connecting the Control Cables to the NA Box
Cable requirements:
☐ Conductor material: copper
☐ Conductor cross-section: 1.5 mm² to 2.5 mm²
Procedure:
1. Insert the control cables into the Multicluster Box (see Section 9.3.1, page 31).
2. Connect the control cables to the spring-cage terminals (see Section 9.4.2, page 35).
• X110:1,2: block of grounding contactor of Multicluster Box
• X110:3,4: feedback from grid contactor of NA Box
• X111:1-4: voltage measurement of NA Box
• X111:6,7: block of generator contactor of Multicluster Box
• X111:8,9: block of grid contactor 2 of NA Box
• X111:11,12: block of grid contactor 1 of NA Box
3. Ensure that the insulated conductors are firmly in place.
Ground connection at terminals X110 and X111
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.
Ground connection at terminals X110 and X111
If the control cable between Multicluster Box and NA Box contains a grounding conductor, the grounding conductor
terminal must not be connected on both sides.