SMA MEDIUM VOLTAGE POWER STATION 500SC-JP - Checking the DC Switchgear

10.5.12 Checking the DC switchgear
Figure 49: Indicators on the DC load-break switch
Position Designation
A Spring status indicator
B Position indicator
C ON button
D OFF button
Requirements:
☐ Supply voltage must be present.
Danger to life from electric shock due to live voltage
High voltages are present in the conductive components of the inverter. Touching live components results in death or
serious injury due to electric shock.
• After switching off the inverter, wait at least 15minutes before opening it to allow the capacitors to discharge
completely.
• Wear suitable personal protective equipment for all work on the product.
• All work must be carried out in accordance with this document. All safety information must be observed.
• Do not touch any live components of the inverter or the medium-voltage grid. Comply with all applicable safety
regulations for handling medium-voltage grids.
Procedure:
1. Switch the inverter to Stop (see Section7.4.1, page100).
2. Open the doors of the interface cabinet.
3. Check whether the DC load-break switch is switched off and indicating the Off position.
If the DC load-break switch is not switched off or not indicating the position Off, contact (see Section17
"Contact", page256).
4. Close the doors of the interface cabinet.
10 Maintenance
SMA Solar Technology AG
System ManualMVPS22JP-SH-en-11156