SMA WB 3000-21 Installation - Manual (Page 54)

9 Disconnecting the Inverter from Voltage Sources SMA Solar Technology AG
54 WB3-5TL-21-IA-en-10 Installation Manual
9 Disconnecting the Inverter from Voltage Sources
1. Stop the small wind turbine system and secure against restart.
2. Disconnect the miniature circuit-breaker and secure against re-connection.
3. If the multi-function relay is used, switch off the load supply voltage.
4. Remove the ESS.
5. Wait until the LEDs, display and if necessary, the load connected to the multi-function relay,
are switched off.
6. Use a current probe to make sure no current is
present in the DC cables.
8. Loosen all six screws of the lower enclosure lid
using an Allen key (AF 3) and remove the enclosure
lid.
Destruction of the measuring device due to overvoltage
• Only use measuring devices with a DC input voltage range up to at least 1,000 V.
7.
Danger to life due to high voltages
The capacitors in the inverter require five minutes to discharge.
• Wait five minutes before opening the enclosure lid.