10 kV switching station on КСО-Е cells: 17 turnkey cubicles for a site in Uman

The task

The client needed a complete 10 kV switching station, not a set of separate cubicles: the delivery had to arrive as one assembly that mates together, shares a single protection scheme and carries documentation for every cubicle.

Three requirements shaped the design:

• 17 bays — two incomers, bus sectionalising, outgoing feeders, metering. Single-side maintenance: the station sits against a wall, accessible from the front only.
• One protection logic — microprocessor protection relays across the cells, with an identical operator interface and telecontrol readiness.
• Compact cubicle width — 800 mm per bay, so that all 17 cells fit the switchroom.

The solution

We built the whole station in house: frames, busbars, switchgear, secondary circuits, marking and testing — one site, one team.

• Frame and layout. КСО-Е-393 cells for single-side maintenance, 2300×800×800 mm, 180 kg each. The 17 cells are arranged in two rows along the room.
• Main circuits. Busbars on post insulators running the length of the row, phase colour marking (yellow / green / red), class-2 bolted joints to GOST 10434-82 with anti-loosening thread protection.
• Switching. Vacuum circuit breakers; rated main-circuit current 630 and 1000 A depending on the bay.
• Protection and automation. Each cubicle front carries a microprocessor protection relay with Ukrainian control labelling — "Увімкнути / Вимкнути / Квитування", and signalling for emergency trip, overcurrent protection operation, earth-fault protection operation and device failure. A separate "ТМ: Вивід / Ввід" selector marks the cell as telecontrol-ready.
• Secondary circuits. Interposing relays, MCBs for the supply circuits, terminal rows XT1–XT5 with every conductor tagged, cubicle thermostat and heater.
• Documentation. Each of the 17 cells has its own factory passport with a serial number and a bill of components.

For designers: the typical solution "10 kV switching station on КСО cells" and КСО protection schemes — drawings and requirement questionnaires.

Figures (from the passports)

КСО-Е-393 single-side-maintenance switchgear cells, 2024

Composition by function (per the front-panel marking): incomer, bus-section, feeder and metering cubicles.

Photo report: from frame to the finished station

We'll build your switching station to your single-line diagram

КСО cells, busbars, protection relays, secondary circuits — from the diagram to factory testing and a passport for every cubicle. Leave a request and an engineer will size the assembly to your number of bays.