SMA SC 500HE-20 Maintenance Manua - Manual (Page 23)

SMA Solar Technology AG 6 Maintenance Under Voltage-Free Conditions
Maintenance Manual SC500-800HE20-WH-en-10 23
– Depress the lever and lift the surge arrester
upwards out of the top-hat rail.
– Insert the new surge arrester into the top-hat rail
from above and press it against the top-hat rail.
– Connect the cables to the terminals from which you removed them before.
3. Use the testing device to check that the surge arrester is operational (instructions for testing are
included in the testing device user manual).
Replace the surge arrester if it is faulty.
6.4.5 Replacing the GFDI/Soft Grounding Relay
Figure 6: Position of the GFDI and the soft grounding relay
Item Description
A GFDI
B Soft grounding relay