SMA PVO-N-20 - Manual (Page 43)

SMA Solar Technology AG 9 Disconnecting the SMA PV Offset Box from Voltage Sources
Installation Manual PVO-BOX-IA-en-10 43
9 Disconnecting the SMA PV Offset Box from Voltage
Sources
1. Disconnect the inverter from all voltage sources (see the inverter installation manual).
2. Switch off the miniature circuit-breaker of the SMA PV Offset Box and secure against inadvertent
re-connection.
3. If a fault indication relay is connected, switch off the voltage supply to the fault indication relay
and secure against inadvertent re-connection.
6. Using a suitable multimeter, ensure that no voltage against earth (FE) is present on the DC
outputs of the SMA PV Offset Box. Only use multimeters with a DC input voltage range up to at
least 1,000 V.
4.
Danger to life due to high voltages in the PV array
During operation with the SMA PV Offset Box, dangerously high voltages may be present at
the PV array due to leakage capacitances.
• Wait one minute for the PV array to discharge before pulling the DC connectors.
5.
Danger of electric arcs if the DC circuit is interrupted by Y plugs
• Do not use Y plugs to interrupt the DC circuit.
• Release and remove all DC connectors on
the SMA PV Offset Box. To do this, insert a
flat-blade screwdriver (blade width: 3.5 mm)
into one of the side slots and pull the DC
connectors straight down. Do NOT PULL
ON THE CABLE.
7.
Danger to life due to high voltages
The SMA PV Offset Box takes 1 minute to discharge.
• Wait 1 minute before opening the enclosure lid.