SMA 1000-1SC, System Manual

Page: 135 / 258

Task
Check the function of the fans with order option "+50°C/+55°C".
Make sure that the grounding contacts are securely in place and show no discoloration or corrosion.
Check the function of the doors and hinges and lubricate them.
Check whether the hinges at the service platform of the medium-voltage compartment function properly.
Check the function of the lighting.
10.2.2.3 MV Transformer
Required maintenance material (not included in the scope of delivery):
☐ Thermographic camera
Maintenance under voltage-free conditions
Task See
Check the tightness of the MV transformer and slightly retighten the screws, if necessary. Documentation for
the MV transformer
For each tap changer, perform a switching test of ten switching cycles across the entire range
under voltage-free conditions. This will prevent oil and carbon deposits from accumulating on
the converter contacts.
Remove any rust patches and repaint.
Check and clean the cable entries, protective device, contact thermometer and control ele-
ments.
Check the contacts of the low-voltage terminals for discoloration. Check whether the protec-
tive covers of the low-voltage terminals are present and intact.
Check whether the contacts of the medium-voltage terminals are intact.
Clean the insulators.
Check the terminals for heating as a result of transition resistances using a thermographic
camera.
Check the protective devices, contact thermometers, accessories and cabling. Check the func-
tion and settings. Documentation for
the MV transformer
Check the torques of the screws.
Check and lubricate the rubber seals on the cable entries.
Check the MV transformer for operating noise.
Check the grounding of the transformer.
Check the oil temperature.
Check the oil level. Refill the oil, if necessary.
10 Maintenance SMA Solar Technology AG
System Manual 135 MVPS22JP-SH-en-11