Key Points to Consider During the Acceptance of Solar Power Plants

1. Was the facility installed in accordance with its project?
2. Was the underground cable installation carried out in accordance with the Cable Installation Procedures and Principles?
3. Are there route marker plates (gabara) on the cable route? (To be used at a maximum of every 50 m, at all turns and road crossings)
4. At building entrances, are the cables installed inside pipes? Is the space between the pipe and the cable filled with suitable material?
5. Is there interior lighting in electrical installations?
6. Are insect screens installed in ventilation openings?
7. Is there a Danger of Death Warning Sign on all movable doors?
8. Is there a Transformer Name plate on the door of each transformer center (transformer + cell + panel)?
9. Are all doors opening outward and made of steel sheet?
10. Are there automatic battery-powered Emergency Lamps in every section of transformer centers?
11. Is there a Fire Extinguisher (CO2) within 25 m of each transformer center?
12. Is there a First Aid Kit within 25 m of each transformer center?
13. Is the operating grounding below 1 ohm and the protective grounding below 1 ohm?
14. At the PV plant entrance, fences, structures, concrete kiosks, inverters, cable trays, etc., are the warning signs specified in the annex used?
15. Cables must be labeled.

2- TRANSFORMER COMPARTMENT:

1. Are the transformer nameplate values compatible with the project?
2. Is there body grounding of the transformer at two points, on the cover and at the base?
3. Is there a chain and Danger of Death Warning Sign at the entrance of the transformer compartment?
4. Is there insulation on LV and MV bushings to protect against contact?
5. Are the transformer wheels fixed with wedges?
6. Is all metal equipment in the transformer compartment grounded?
7. Is there at least 60 cm distance between the transformer and the walls? (Not applicable for concrete kiosks)
8. Are MV cable cross-sections compatible with the project?

3- MV CONTROL COMPARTMENT

1. Is the installation of the cells carried out in accordance with the project?
2. Do MV cells have body grounding?
3. Is all metal equipment in the MV control compartment grounded?
4. Is the distance between the cells and the rear wall equal to or greater than 10 cm?
5. Are MV gloves, insulating mats, and stools available?
6. Is there a BAR-24 separately for each MV Control compartment?
7. Is there a Fire Extinguisher (CO2) within a maximum of 25 m of each MV Control Compartment?
8. Is the top of the cable duct in the cell compartment covered with galvanized sheet metal?
9. Is there a single-line diagram in the MV Control Compartment?
10. Are there plates on MV cells indicating input/output information?
11. Is there a First Aid Instruction for electrical accidents?
12. When the power goes out, the autoproducer breaker must open.
13. When the power is restored, the autoproducer breaker must close.
14. When the autoproducer breaker is opened manually, it must not reclose automatically.

4- LV PANEL and FIELD COMBINER PANEL

1. Are the nameplate values of the LV Panel compatible with the project?
2. Does the LV Panel have body grounding?
3. Is all metal equipment in the LV panel compartment grounded?
4. Are the ratings of the MCCB and outgoing fuses in the LV Panel compatible with the project?
5. In the LV panel, when power is cut from MV, the motorized MCCB must open (if specified in the project).
6. In the LV panel, when power is supplied from MV, the motorized MCCB must close (if specified in the project).
7. When opened manually in the LV panel, the motorized MCCB must not reclose (if specified in the project).
8. When the motorized MCCB is opened manually, there must be no energy on the lower busbars of the MCCB.
9. Are measuring devices connected before the MCCB? (Do they measure energy when the MCCB is open (0)?)
10. Are MV cable cross-sections compatible with the project?
11. In the field panel, are DC fuses correct and are RCD values correct? Are short-circuit breaking capacities correct?
12. LV panels must have an Emergency Trip Button that directly trips the transformer protection cell.

5- INVERTER

1. The manufacturing date of panels and inverters must not exceed 5 years. Serial numbers of inverters and panels are important.
2. Inverter power ratings and configurations must comply with the project.
3. When grid power is cut, a test must be performed to verify that the inverters stop operating.
4. The presence of DC fuses and surge arresters inside the inverter must be checked according to the project.

6- SOLAR PANELS

1. The manufacturing date of panels and inverters must not exceed 5 years. Serial numbers of inverters and panels are important.
2. Does it comply with the site layout plan? Are panel placements and quantities correct? Are panel power ratings correct?
3. Special attention must be paid to the front-rear height, tilt angles, and spacing between panels to ensure compliance with the project.

7- FIELD APPLICATIONS: CONSTRUCTION–STRUCTURE–FENCE–CABLE TRAY

1. Installation must be carried out in accordance with the approved construction project.
2. Special attention must be paid to the front-rear height, tilt angles, and spacing between panels to ensure compliance with the project.
3. Warning signs specified in the annex must be used frequently on fences, cable trays, and piles.
4. There must be barbed wire under the fence.
5. Fire extinguishers must be available at various points in the field (especially near field panels).
6. Concrete kiosks and field combiner panel access roads must be suitable for vehicle access (gravel/paving/asphalt/stabilized, etc.).
7. There must be no grass, trees, or bushes in the field.

8- GROUNDING–LIGHTNING PROTECTION –LV SURGE ARRESTER

1. Grounding must be carried out in accordance with the approved grounding project.
2. When using Cu and Al during grounding, bimetal must be used at connection points and precautions must be taken against oxidation.
3. Even if not included in the project, all metal equipment in the facility (doors, fences, etc.) must be grounded.
4. Both operating and protective grounding must be below 1 ohm.
5. A report proving that grounding measurements were carried out by an authorized engineer, authorization documents, calibration certificates, must be submitted as an annex to the provisional acceptance report.
6. Were Class B+C Surge Arresters used on AC and DC lines and Class D Surge Arresters on communication lines?
7. Was the External Lightning Protection System bonded to equipotential? Were spark gap arresters used?
8. Was the External Lightning Protection System designed in accordance with IEC 62305? Are the air terminals used anticorrosive?
9. Were measurements of the External Lightning Protection System carried out in accordance with IEC standards?
10. Was equipotential bonding achieved in the facility? Does the resistance difference across the facility exceed 0.2 ohms?