Typical Solution: KTP-1000/10/0.4 kV Package Substation for Solar Power Plants — Complete Set of Diagrams (RU-10, RU-0.4, ShchVP)
Complete set of diagrams for a KTP-1000/10/0.4 kV package transformer substation for solar power plants: 10 kV switchgear (RU-10) on KSO-E-393 cubicles, 0.4 kV switchgear (RU-0.4) on ShchO-90 panels, ShchVP auxiliary-supply cabinet, cable schedule — 31 sheets, PDF. DWG on request.
Published: 11.06.2026 · Author: engineering department of LK Energy LLC
A complete set of working diagrams for a KTP-1000/10/0.4 U1 package transformer substation for a solar power plant: 6 PDF files (31 sheets) — 10 kV switchgear (RU-10) on KSO-E-393V cubicles, 0.4 kV switchgear (RU-0.4) on ShchO-90 panels for eight 100 kW Huawei inverters, the ShchVP auxiliary-supply cabinet, and the complete internal wiring of the substation with a cable schedule. The drawings were produced by LK Energy engineers based on an actual solar power plant project (2021). The PDFs are freely available below; the DWG set is available free of charge on request via the form. If you need questionnaire sheets for 6 kV block package substations and switchgear distribution points (KRP), see the typical solution for a 4.95 MW solar power plant.
How a 10/0.4 kV package substation is arranged within a solar power plant
The inverters of the photovoltaic array (in this solution — 8 × Huawei Sun2000-100KTL-M1, 800 kW combined) feed power to the 0.4 kV switchgear (RU-0.4) cabinets: two ShchO 90-1431 feeder panels with 250 A feeders combine the inverter circuits onto a busbar section, and the ShchO 90-1116 incoming panel with a VA79E-2000 air circuit breaker passes the power on to the TMG-1000/10/0.4 power transformer. The 10 kV side is built on three KSO-E-393 cubicles: a transformer cubicle, a voltage-transformer (VT) cubicle with an NTAMI-10 voltage transformer, and an outgoing line with a BB/TEL vacuum circuit breaker and RS80-MR microprocessor-based protection, through which the plant delivers power to the 10 kV grid.
The set covers more than just the primary circuits: the outgoing-line cubicle diagrams include commercial metering circuits for two meters and a DIRIS A20 power-quality monitor; the VT cubicle includes an uninterruptible power supply unit for the control circuits; the ShchVP cabinet covers the auxiliary supply (lighting with a twilight relay, ventilation, air conditioning, the "Tiras-4P" fire alarm system, and the automated commercial electricity metering system, ASKOE). A separate file covers the substation's internal wiring, including the cable schedule and the compartment interconnection diagram. This solution is for projects with a 0.8 MW solar power plant (8 inverters of 100 kW each) feeding a single package substation; for larger plants with block package substations and a collection point, see the typical solution for a 6 kV package substation and switchgear distribution point for solar power plants; for consumer grid substations, see the 10/0.4 kV package substation with low-voltage switchgear (RUNN); for distribution points without transformation, see the 10 kV distribution point on KSO cubicles.
Technical parameters of the solution
- Power transformer: TMG-1000/10/0.4-D/Yn-11, 1000 kVA
- Generation: 8 Huawei Sun2000-100KTL-M1 inverters (800 kW combined), power collected on the 0.4 kV side; Huawei SmartLogger 3000A data logger
- 10 kV switchgear (RU-10): 3 KSO-E-393V cubicles (630 A busbars) — outgoing line cubicle KSO-E-393-17V (BB/TEL-10-20/630, RS80-MR-3221, four-winding TCS2-12 current transformers, 2 metering points, DIRIS A20), transformer cubicle KSO-E-393-00*, VT cubicle KSO-E-393-11A (NTAMI-10, PN-011 fuses, OPNp-10 surge arresters)
- 0.4 kV switchgear (RU-0.4): incoming panel ShchO 90-1116 (VA79E-2000 air circuit breaker, 2000 A, T-0.66 current transformer 2000/5, accuracy class 0.5s) + 2 feeder panels ShchO 90-1431 (4 × 250 A feeders each, VA-73)
- Auxiliary supply: ShchVP cabinet — lighting with an SOU-2 twilight relay, ventilation (7 fans with thermostats), air conditioning, "Tiras-4P" fire alarm system, power supply for ASKOE and relay protection and automation (RZA); uninterruptible power supply for control circuits in the VT cubicle
- Year developed: 2021, diagram language — Ukrainian (some labels on the 2021 sheets are in Russian)
- Ratings for a specific implementation are agreed via the questionnaire sheet
Contents of the set and downloads
| No. | Document | Contents | File |
|---|---|---|---|
| 1 | 10 kV switchgear (RU-10) questionnaire sheet | Three KSO-E-393V cubicles: primary connection diagrams, equipment, cubicle widths (1 sheet) | |
| 2 | Cubicle No.1 "Outgoing Line" KSO-E-393-17V | Schematic diagrams: BB/TEL-10-20/630, RS80-MR-3221, metering circuits for 2 meters, DIRIS A20, bill of materials (6 sheets) | |
| 3 | Cubicle No.3 "VT" KSO-E-393-11A | Schematic diagrams: NTAMI-10, PN-011 fuses, uninterruptible power supply unit, busbar arrangement (3 sheets) | |
| 4 | 0.4 kV switchgear (RU-0.4) — ShchO-90 cabinets | Schematic diagrams: incoming panel ShchO 90-1116 with VA79E-2000, and two feeder panels ShchO 90-1431 for inverter feeders (4 sheets) | |
| 5 | ShchVP auxiliary-supply cabinet | General view and diagrams: lighting, ventilation, air conditioning, fire alarm system, power supply for ASKOE/RZA (5 sheets) | |
| 6 | Internal wiring of the package substation | Equipment layout, lighting, ventilation, fire alarm system, compartment interconnections, cable schedule (12 sheets) |
Preview
DWG set on request
We will send the complete DWG set to your email free of charge: 10 kV switchgear (RU-10) diagrams (questionnaire sheet, outgoing line, VT cubicle), 0.4 kV switchgear (RU-0.4) on ShchO-90 panels, and the internal wiring of the package substation with the cable schedule.
Frequently asked questions
Can this solution be used in the design of our own solar power plant?
Yes — as a typical base solution for a solar power plant delivering 0.8 MW (8 inverters of 100 kW each) through a single 10/0.4 kV package substation. Site-specific adaptation, calculation of relay protection and automation (RZA) settings, and compliance with the applicable PUE (electrical installation rules) and DSTU (Ukrainian national standards) are the responsibility of the design engineer. The diagrams were produced based on an actual 2021 solar power plant project.
What equipment is specified?
KSO-E-393V cubicles and ShchO-90 panels manufactured by LK Energy, a BB/TEL-10-20/630 vacuum circuit breaker, RS80-MR-3221 protection, an NTAMI-10 voltage transformer, a VA79E-2000 air circuit breaker, a TMG-1000/10/0.4 transformer, and Huawei Sun2000-100KTL-M1 inverters.
How is this solution different from the "6 kV package substation and switchgear distribution point for solar power plants"?
That solution consists of questionnaire sheets for KTP-1250 block package substations and a switchgear distribution point (KRP) collection point for large plants with several blocks. This one is a complete set of schematic diagrams for a single turnkey KTP-1000 10/0.4 kV package substation: primary and secondary circuits, auxiliary supply, internal wiring, and the cable schedule.
How can I get the DWG files?
Fill out the form on this page — we will send the set to your email within one business day.
Does LK Energy manufacture this equipment?
Yes. KSO-E cubicles, ShchO-90 panels, auxiliary-supply cabinets, and fully assembled package substations are manufactured at our own production facility in Odesa; we build solar power plants on a turnkey basis as an EPC contractor. Consultations for design engineers: +38 067 104 94 91.
The diagrams are provided as a reference typical solution. Site-specific adaptation, calculation of relay protection and automation (RZA) settings, and compliance with applicable standards (PUE, DSTU, DBN) are the responsibility of the design engineer. LK Energy is not liable for the application of this solution without adaptation to the conditions of a specific site.
Any questions left?
Write or call us — we answer to the point. Preliminary reply within 24 hours.
+380 67 104 94 91