SMA MULTICLUSTER BOX 12 - Manual (Page 28)

8 Disconnecting the Multicluster Box and Multicluster System SMA Solar Technology AG
28 MC-BOX-12-3-20-BE-en-10 Operating Manual
8 Disconnecting the Multicluster Box and Multicluster System
1. Switch all loads off.
2. Stop the multicluster system at the master of the main cluster (see documentation of the Sunny Island inverter).
3. Switch off all Sunny Island inverters (see documentation of the Sunny Island inverter).
4. In the Multicluster Box, switch off all circuit breakers of the Sunny Island inverters.
5. Disconnect the main PV distribution board and secure against reconnection.
6. Shut down the generator and secure against reconnection.
7. If a Grid Connect Box or NA Box is installed, perform the following steps:
• Open the Grid Connect Box or NA Box.
• In the Grid Connect Box or NA Box, switch off all circuit breakers and residual-current devices.
• Switch off the AC voltage supply at the grid-connection point.
8. Open the Multicluster Box.
10. Disassemble the protective cover (see Section 9.1, page 29).
11. Ensure that the Multicluster Box is voltage-free.
12. Ground and short-circuit the main PV distribution board outside the Multicluster Box.
13. Ground and short-circuit the generator outside the Multicluster Box.
14. Cover and isolate any adjacent live components.
9. &$87,21
Risk of burns due to hot components
Components and terminals inside the Multicluster Box can get hot during operation. Touching hot components can
cause burns.
• Prior to removing the protective cover, let the Multicluster Box cool down.