SMA MEDIUM VOLTAGE POWER STATION 500SC-JP - Checking the Surge Arresters

Damage to bolted connections through overtightening
If the permitted torques are exceeded, bolted connections can be damaged. In this case, fault-free operation of the
inverter is no longer ensured.
• Only tighten loose bolted connections to the prescribed torque. Torque specifications are indicated in the circuit
diagram of the inverter. If there is any information missing, contact (see Section17 "Contact", page256).
Procedure:
1. Check that the bolted connections of all assemblies are securely in place.
If bolted connections are loose, tighten them using a torque wrench.
2. Check whether all bolted connections of the power cabling are securely in place.
If bolted connections are loose, tighten them using a torque wrench.
3. Check the insulation and connections for any discoloration or change in appearance.
If insulation and connections are discolored or changed, contact us (see Section17 "Contact", page256).
4. Check the bolted connections for damage and contact elements for corrosion.
If bolted connections are damaged or contact elements corroded, replace them.
10.5.6 Checking the Surge Arresters
Figure 43: Position of the surge arresters
Position Designation
A Ready indicator
Additionally required maintenance material (not included in the scope of delivery):
☐ A surge arrester testing device approved by the manufacturer of the surge arrester such as the PM20 by DEHN +
SÖHNE GmbH + Co. KG.
10 Maintenance
SMA Solar Technology AG
System ManualMVPS22JP-SH-en-11148