SMA TCS 500-SC Maintenance manual - Manual (Page 12)

3 Maintenance Schedule SMA Solar Technology AG
12 TCS-CP-WH-en-10 Maintenance manual
1 year Medium-voltage
transformer • Check oil level
• Check oil temperature
• Check transformer for oil leaks
• You should switch the tap changer to a
voltage-free state at least once per year with ten
switching cycles in each case across the entire
range. This will prevent oil and carbon deposits
from accumulating on the converter contacts
• Check the paint and the sealing joints of
transformers not currently in operation
• Carry out a check for leaks, rust stains and
damage
• Check cable entries, protective devices, and
control elements for dirt
• Check for local warming as a result of transition
resistance at the overvoltage and undervoltage
connections
• Check the ambient temperature and the room
ventilation
• Check the transformer for operating noise
• Check the transformer protective devices/contact
thermometers and accessories
– Functionality
– Set and check the contacts
– Cabling
• Check the test device
Interval Component Activity