Connecting The Utility Grid; Connecting Control And Measuring Cables Of The Multicluster-Box - SMA GRID-CONNECT-BOX 12 Instrucciones De Funcionamiento

SMA Solar Technology AG
5. Ensure that a right-hand rotating magnetic field is present at the connection point of the Multicluster-Box.
6. Provide for strain relief of the power cables in the spring-cage terminal by attaching them to the appropriate cable
support rail. Use the strain reliefs and counter-sleeves provided.
6.4

Connecting the Utility Grid

Cable requirements:
☐ Conductor material: copper
☐ Conductor cross-section: 50 mm² to 150 mm²
☐ The power cables must be ground-fault and short-circuit protected.
☐ Line conductors, the neutral conductor and grounding conductor must have the same cross-section.
☐ The AC conductors and DC conductors must always be routed in separate cables.
Procedure:
1. Insert the power cables into the product (see Section 9.2, page 24).
2. Connect the grounding conductor to the spring-cage terminal PE at terminal X301:4 (see Section 9.3,
page 25).
3. Connect the neutral conductor to the spring-cage terminal N at terminal X301:5.
4. Connect the line conductors to the spring-cage terminals L1, L2 and L3 at terminal X301:1-3.
5. Ensure that a right-hand rotating magnetic field is present at the connection point of the Multicluster-Box.
6. Provide for strain relief of the power cables in the spring-cage terminal by attaching them to the appropriate cable
support rail. Use the strain reliefs and counter-sleeves provided.
6.5

Connecting Control and Measuring Cables of the Multicluster-Box

Assignment of spring-cage terminals with the control cables:
Figure 9 : Overview of the spring-cage terminals
Position
A
B
C
Operating manual
1 2
A
Designation
Multicluster-Box grounding contactor interlock (DC)
Grid-Connect-Box AC contactor feedback (DC)
Grid Connect Box voltage measurement (AC)
3 4 5 6 1 2 3 4 5 6 7 8 9 10 11 12 13
PE PE PE PE PE
X310 X311
B D E
C
GRID-BOX-12-3-20-BE-xx-12
6 Electrical Connection
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