SMA MEDIUM VOLTAGE POWER STATION 500SC-JP System Manual page 155

SMA Solar Technology AG
Figure 48: Switch positions of the AC disconnection unit from ABB
Position Designation
A Switch position on
B Central switch position
C Switch position off
Additionally required maintenance material (not included in the scope of delivery):
☐ Test device approved by the manufacturer of the AC disconnection unit, e.g. TT1 by ABB
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. Use the test device to check whether the AC disconnection unit is ready for operation (instructions for testing are
included in the documentation of the testing device).
2. If the AC disconnection unit is not ready for operation, contact (see Section 17 "Contact", page 256).
System Manual
Explanation
The AC disconnection unit is closed.
The AC disconnection unit was tripped and is open.
The AC disconnection unit is open.
MVPS22JP-SH-en-11
10 Maintenance
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