SMA NR-STP-DC-EMV, Replacement Manual

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5 Disconnecting the Inverter from Voltage Sources SMA Solar Technology AG
Replacement Manual DC-EMV-STPTL10-RM-xx-10 12
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 DC input voltage range of 1000 V or higher.
Procedure:
1. Disconnect the circuit breaker from all three line conductors and secure against reconnection.
2. If an additional DC load-break switch is available, switch off the DC load-break switch and
secure against re-connection.
3. If the multifunction relay is used, switch off any supply voltage to the load.
4.
DANGER
Danger to life due to electric shock and electric arc when disconnecting
the ESS in the event of an error
If an acoustic signal sounds, the inverter is in error mode. In this case, the removal of the
ESS results in death or serious injury due to electric shock and electric arc.
• Test whether there is an acoustic signal.
• If an acoustic signals sounds and the display shows an error message that prohibits
removing the ESS, wait until dark. The ESS can only be removed once it is dark.
• If no acoustic signal sounds and the display does not show an error message, remove
the ESS.
5. Wait until the LEDs and the display have gone out.
6. Release all six screws of the lower enclosure lid
using an Allen key (AF 3).
7. Flip the lower enclosure lid up and remove it.
ENGLISH