SMA SC 500CP XT Installation - Manual (Page 37)

6. Disassemble the protective covers of the fuses (see Section 7.2.2, page 41).
7. Remove all fuses and disconnection blades from all fuse holders of the inverters. Use an LV/HRC fuse extractor.
6.2.3 Disconnecting the AC Side
1. Switch off the inverter (see Section 6.2.1, page 36).
2. Disconnect the DC side (see Section 6.2.2, page 36).
3. Externally disconnect the AC voltage of the MV transformer.
4. Switch off the AC disconnection unit in the inverter.
5. Ensure that no voltage is present.
6. Cover or isolate any adjacent live components.
6.2.4 Disconnecting the Supply Voltage and External Voltages
1. If the supply voltage is only to be disconnected upstream from
the circuit breaker, switch the circuit breaker of the supply
voltage off.
2. If the supply voltage is also to be disconnected downstream from the supply voltage circuit breaker, switch the
external circuit breaker of the supply voltage off.
Tip: The external circuit breaker of the supply voltage is usually located in a subordinate distribution station.
3. Disconnect any additional external voltage.
4. Switch the motor-protective circuit-breakers of the grid
monitoring off.
6 Disconnecting and Reconnecting SMA Solar Technology AG
Operating Manual 37 SCCPXT-IA-E4-en-44