SMA SC 500HE-20 Maintenance Manua - Manual (Page 31)

SMA Solar Technology AG 6 Maintenance Under Voltage-Free Conditions
Maintenance Manual SC500-800HE20-WH-en-10 31
6.8 Maintenance after Connecting the Control Voltage
6.8.1 Connecting the Voltage
1. Open the doors of the interface cabinet.
2. Switch on the grid monitoring miniature
circuit-breaker.
3. Connect additional external voltage.
4. Connect external voltage supply externally.
5. Connect AC circuit breaker.
6. Connect the DC voltage in the main distributor or the sub-distributor.
7. Connect the AC voltage of the medium-voltage transformer externally.
8"3/*/(
High voltages that can cause fatal electric shocks are present in the live components of
the inverter.
• Move the key switch to the "Stop" position and ensure it cannot be reconnected accidentally.
• Do not touch any live components in the inverter or the medium-voltage grid. Comply with all
applicable safety regulations for handling medium-voltage grids.
• All previously removed protective covers must be mounted.