Standard Solution: 0.4 kV Switchboard on ShchO-90 Panels for a Two-Transformer Package Substation
A ready-made set of diagrams for a 0.4 kV ShchO-90 switchboard for a two-transformer package substation: specification sheet, incomers, sectionalizing panel with ATS, feeder panels. PDF open access, DWG on request.
Published: 11.06.2026 · Author: Engineering Department of LK Energy LLC
A ready-made documentation set for a 0.4 kV switchboard of a two-transformer package substation on seven ShchO-90 panels: a specification sheet with a table of panels and devices, a single-line diagram and layout plan of the 0.4 kV switchgear with dimensions, as well as schematic diagrams of individual panels — incomers for 630 and 1600 A, a sectionalizing panel with ATS (automatic transfer switch), and a feeder panel. The documents were developed by LK Energy engineers for real orders from 2021. Some sheets are in Russian (projects from before 2022); new sets are produced by LK Energy in Ukrainian. The PDF is freely available below; the source drawings are available on request via the form.
What ShchO-90 Is and Where It Is Used
ShchO-90 panels (single-side-access switchboard panels, series 90) are a standard design for assembling a 0.4 kV switchboard: the 0.4 kV switchgear of transformer substations (package substations, KTP — complete transformer substations), distribution points, and building service entrance/distribution devices. The switchboard is assembled from individual single-side-access panels installed in a row against a wall and connected by common busbars: incomer panels from the power transformers, a sectionalizing panel (with automatic transfer switch, ATS, where required), and feeder panels with outgoing circuits.
For a two-transformer package substation, the standard configuration is two incomer panels from transformers T1 and T2, a sectionalizing panel between the two busbar sections, and feeder panels for outgoing lines with commercial or technical metering. This is exactly the scheme implemented in this set: 7 ShchO-90 panels, a single-line diagram of the 0.4 kV switchgear in the specification sheet, and an equipment layout plan referenced to the transformer bays.
When a design engineer needs a ShchO-90 panel diagram for a specific site, the starting point is the specification sheet: it sets out, in tabular form, the ratings of switch-disconnectors and circuit breakers, trip settings, current transformers, measuring instruments, and the purpose of each feeder. This set covers the standard task and can be adapted to other 0.4 kV switchgear configurations.
Technical Parameters of the Solution
- Rated voltage: 380 V; rated busbar current: 1300 A
- Busbars and PEN conductor: AD31 80×8
- Switchboard composition: 7 panels — 2 incomers ShchO 90-1114 (from T1, 400 kVA, and T2, 630 kVA), sectionalizing panel ShchO 90-1318 with ATS, 2 feeder panels ShchO 90-1413* (for commercial metering), 2 feeder panels ShchO 90-1438*
- Incomer panels: RE19-43-311400 switch-disconnector 1600 A + VA79E-2000 circuit breaker 1600 A (per the specification sheet of the real site; selection is based on the calculated load), TSh-0.66 accuracy class 0.5S current transformers (6 per incomer), VCF multimeter, mounting space for a GAMA 300 meter
- Sectionalizing panel: 2 RE19-41-311400 switch-disconnectors 1000 A + YCM8E-1000H circuit breaker 1000 A, ATS circuit
- Feeder panels: YCM8E-250H/400H and YCB6N-63 circuit breakers, T-0.66 accuracy class 0.5S current transformers
- Layout plan: front of 7 panels 6×700 = 4200 mm, ShM busbar bridge L=970 mm to the T1/T2 bays
- Additional diagrams of other versions: 1600 A incomer on an HGS16A3B (65 kA) with telemechanics, sectionalizing panel ShchO 90-1313 with ATS on a UAN10A3B 1000 A (85 kA) with an RNPP-311M voltage monitoring relay, 630 A incomer on an NSX630N Micrologic 2.3, 630 A feeder
- Year of development: 2021; diagram language: Russian. Source drawings made in KOMPAS (.cdw); DWG/DXF export provided on request
- Parameters of a specific version (device ratings, trip settings, number of panels, metering) are agreed upon based on the specification sheet
Set Contents and Downloads
| No. | Document | Contents | Sheets | Diagrams |
|---|---|---|---|---|
| 1 | Specification sheet for ShchO-90 panels (two-transformer package substation) | Table of 7 panels with devices and a single-line diagram + layout plan of the 0.4 kV switchgear | 3 | |
| 2 | Incomer panel ShchO 90-1114, 1600 A | Schematic electrical diagram: HGS16A3B 1600 A, GAMA 300 metering, remote control/telemetry | 2 | |
| 3 | Sectionalizing panel ShchO 90-1313 with ATS, 1000 A | Main circuit diagram + full ATS circuit: UAN10A3B 1000 A, RNPP-311M voltage monitoring relay, telemechanics | 5 | |
| 4 | Incomer panel ShchO 90-1113, 630 A | Schematic diagram: RE19-39 + NSX630N Micrologic 2.3, NIK2301 meter, KSO lighting circuits | 1 | |
| 5 | Feeder panel ShchO 90-1421, 630 A | Schematic diagram of the outgoing line: RE19-39 + NSX630N, T-0.66 600/5 | 1 |
Items 2-5 are per-panel diagrams of ShchO-90 panels from other real orders from 2021: examples of versions with different equipment.
Diagram Previews
DWG Set on Request
The source drawings are made in KOMPAS (.cdw); we provide a DWG/DXF export on request. We will send the set and the specification sheet for your site to your email free of charge.
Frequently Asked Questions
Can these diagrams be used in a working project?
Yes — as a standard base solution. Adaptation to a specific site, selection of device ratings, calculation of trip settings, and compliance with the current PUE (Electrical Installation Rules) / DSTU (Ukrainian national standards) are the responsibility of the design engineer. The diagrams correspond to real orders manufactured in 2021.
What equipment is specified in the diagrams?
RE19 switch-disconnectors (630-1600 A), VA79E-2000 circuit breakers, YCM8E (250-1000 A), YCB6N-63, NSX630N Micrologic 2.3, HGS16A3B, UAN10A3B; TSh-0.66 and T-0.66 accuracy class 0.5S current transformers; RNPP-311M voltage monitoring relay; GAMA 300 and NIK2301 meters. For versions with other equipment, please contact us.
Why are the diagrams in Russian?
This is working documentation from real orders from 2021 in our archive. We develop new sets in Ukrainian — the structure and circuit solutions remain unchanged.
How can I get the source files (DWG/CDW)?
Fill out the form on this page — we will send the source drawings to your email within one business day.
Does LK Energy manufacture ShchO-90 panels?
Yes. ShchO-90 panels are a standard product of our production facility in Odesa: we manufacture individual panels and complete 0.4 kV switchboards to a specification sheet, with more than 3000 units of equipment produced since 2015. We will help you select equipment and fill out the specification sheet: +38 067 104 94 91.
The diagrams are provided as a reference standard solution. Adaptation to the site, verification of protective device selectivity, and compliance with current standards (PUE, DSTU, DBN — State Building Norms) are the responsibility of the design engineer. LK Energy is not liable for the use 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