Disconnecting the Inverter from Voltage Sources
Qualified person
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.
- Only use measuring devices with a measurement ranges designed for the maximum AC and DC voltage of the inverter.
Procedure:
- Shut down the AC voltage supply and secure against unintentional reconnection.
- Switch off both DC load-break switches of the inverter and secure against reconnection.
- Wait until the LEDs have gone out.
- Use a current clamp to ensure that no current is present in the DC cables.
- Note the position of the DC connectors.
- Unlock the DC connector using the corresponding unlocking tool and remove (refer to the manufacturer manual for further information).
- Ensure that the DC connectors on the product and those that are equipped with DC conductors are in perfect condition and that none of the DC conductors or DC plug contacts are exposed.
- Ensure that no voltage is present at the DC inputs on the inverter using a suitable voltage detector.
- Wait 5 minutes before proceeding.
- Check that there is no voltage at the AC connection between L1 and L2, L2 and L3, L1 and L3 and L1 and grounding conductor, L2 and grounding conductor, L3 and grounding conductor and between L1 and N, L2 and N and L3 and N using a suitable voltage detector. For this purpose, hold the test prods to the conductors' ring terminal lugs.
DANGER
Danger to life due to high voltages
Even after disconnection, there are residual voltages on the product that must be removed.