SMA STP 15000TL - Manual (Page 48)

10 Disconnecting the Inverter from Voltage Sources
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.
Destruction of the measuring device due to overvoltage
• Only use measuring devices with a DC input voltage range of 1,000 V or higher.
Procedure:
1. Disconnect the circuit breaker from all three line conductors and secure against reconnection.
2. If the multifunction relay is used, switch off any supply voltage to the load.
3. Test whether there is an acoustic signal.
If an acoustic signals sounds and the display shows an error message that prohibits
disconnecting the ESS, wait until dark. The ESS can only be disconnected once it is dark.
If no acoustic signal sounds and the display does not show an error message, remove the ESS.
4. Wait until the LEDs and the display have gone out.
5. Remove all six screws from the lower enclosure
lid using an Allen key (AF 3).
6. Flip the lower enclosure lid up and remove it.
7.
Risk of burns when touching the DC protective cover
The DC protective cover can get hot during operation.
• Do not touch the DC protective cover.
8. Use an appropriate measuring device to ensure that no voltage is present at the AC
connecting terminal plate between L1 and N, L2 and N, and L3 and N. Insert the test probe
into each round opening of the terminal.
10 Disconnecting the Inverter from Voltage Sources SMA Solar Technology AG
Operating Manual STP15-17TL-10-BE-en-10 48