Check that the inverter is de-energized

Qualified person

Before carrying out any work on the inverter, always check that the inverter is de-energized as described in this section. Always adhere to the prescribed sequence.

WARNING

Danger to life due to electric shock from destruction of the measuring device due to overvoltage

Overvoltage can damage a measuring device and result in voltage being present in the enclosure of the measuring device. Touching the live enclosure of the measuring device results in death or lethal injuries due to electric shock.

  1. Only use measuring devices with a measurement ranges designed for the maximum AC and DC voltage of the inverter.
  2. Only use measuring devices with measurement ranges designed for the maximum DC voltage of the battery.

Requirement:

Procedure:

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  1. Use a current clamp to check that no current is present in the DC conductors for the PV modules.
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  2. Use a current clamp to ensure that no current is present in the DC conductors for the battery.
  3. Note the positions of the DC conductors.
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  4. Disconnect 1 DC conductor from the terminals and immediately insulate it to prevent contact between the stripped conductors. Repeat the procedure for each DC conductor.
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  5. Verify the absence of voltage at all terminals between PV+ and PV- using a suitable voltage detector.
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  6. Veryfy the absence of voltage between the PVA+ and PE terminals, as well as between PV- and PE, on the busbar used for grounding the PV modules.
  7. Use a suitable voltage detector to ensure that there is no voltage between the connection terminals BAT+ and BAT-.
  8. Verify the absence of voltage between the BAT+ and PE terminals, and between the BAT- and PE terminals, on the busbar used for grounding PV modules, using an appropriate voltage detector.
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  9. Make sure there is no voltage at the AC terminals between L1 and N as well as between L2 and N.
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  10. Make sure there is no voltage between L1 and L2 on the AC terminals and PE on the busbar for grounding the AC connection.

    Also see:

    Remove enclosure lid
    Cleaning