SMA NR-STP150H-ACCON Manual De Instrucciones página 15

SMA Solar Technology AG
15. Use an appropriate measuring device to ensure that
no voltage is present at the AC terminal block
between L1 and N, L2 and N, and L3 and N.
Insert the test probe of the multimeter into the round
opening in the terminal.
16. Use an appropriate measuring device to ensure that no voltage is present at the AC terminal
block between L1 and PE, L2 and PE, and L3 and PE. Insert the test probe into each round
opening of the terminal.
17. Ensure that no voltage is present between any terminal of the multifunction relay and PE of the
AC terminal block.
18. Disconnect the communication assembly from the
inverter. To do so, release and remove the ribbon
cable from the communication assembly.
Discharging residual voltages in the inverter
Prior to removing individual assemblies, all assemblies must always be discharged.
1.
Danger to life due to high voltages in the inverter
The capacitors in the inverter take 5 minutes to discharge.
• Wait 5 minutes before opening the upper enclosure lid.
2. Unscrew all screws from the upper enclosure lid (hex socket, AF 4).
3. Pull the upper enclosure lid forward to remove it.
4. Remove the DC protective cover. To do so, release all 4 screws from the DC protective cover
(hex socket, AF3) and remove it.
5. Discharge the H-AST assembly at the contact points using a 2-pole voltage detector without
intrinsic voltage source:
Replacement Manual
5 Disconnecting the Inverter from Voltage Sources
DANGER
STPTL-30-H-AC-CON-RM-xx-10 15