Disconnecting the Inverter from Voltage Sources
Qualified person
Prior to performing any work on the inverter, always disconnect it from all voltage sources as described in this section. Always adhere to the prescribed sequence.
Prerequisite:
The enclosure cover must be removed ( > Remove enclosure lid).
Procedure:
- Use a current clamp to check that no current is present in the DC conductors for the PV modules.
- Write down the positions of the terminal blocks for connecting the PV modules.
- Remove the terminal blocks for connecting the PV modules from the slots.
- Use a suitable measuring device to ensure that there is no voltage between each of the slots PVA, PVB and PVC and PV+ and PV-.
- Ensure that there is no voltage between each of the slots PVA, PVB and PVC and PV+ and PE on the busbar for grounding the PV modules.
- Use a current clamp to ensure that no current is present in the DC conductors for the battery.
- Remove the DC conductors from the connection terminals.
- Use a suitable measuring device to ensure that there is no voltage between the connection terminals BAT+ and BAT-.
- Use a suitable measuring device to ensure that there is no voltage between the connection terminal BAT+ and PE on the busbar for grounding the PV modules.
- Ensure that there is no voltage at the AC connection terminals between L and N.
- Ensure that there is no voltage between L on the AC connection terminals and PE on the busbar for grounding the AC connection.
Also see: