Transformer substations
Walk-in container transformer substation 100 to 1600 kVA
Where it is used and how it is built
Applications
- manufacturing plants and industrial halls
- hospitals, schools, wastewater treatment plants and other public buildings
- logistics and retail centres
- customers with billing metering on the MV side
- sites with planned capacity expansion
- substations handed over to a DSO whose standard specifies internal operation
Design
- Enclosure width 2.55 m up to 630 kVA and for the 2 x 630 kVA arrangement (2.96 m on request), 2.96 m from 800 to 1250 kVA and for two transformers above 630 kVA; from 1600 kVA a custom multi-segment enclosure.
- Length depends on the number of MV panels and the size of the LV switchboard: 3.00 to 8.00 m at a width of 2.55 m, 2.96 to 8.56 m at 2.96 m, in steps of 0.20 m.
- Transformer chamber at the end wall; with two transformers, two chambers at both ends of the enclosure.
- MV switchgear along the rear wall, LV switchboard perpendicular to it next to the chamber partition, cable basement hatch in the corridor.
- Foundation with cable basement and oil sump for the full oil volume, natural ventilation, anti-condensation heating, lighting and auxiliary supply switchboard.
Advantages
- Switching, meter readings and inspections under a roof.
- Space for an MV metering panel, meter cabinet, telecontrol and spare LV feeders.
- Expansion without replacing the enclosure: future rating, up to 24 outgoing and spare LV feeders, a second transformer.
- With two transformers, two LV sections with a bus coupler: servicing one transformer does not shut down the site.
Limitations
- Greater weight: body, foundation with basement and roof are transported separately.
- Excavation for the cable basement: foundation base approx. 0.90 m below ground level, plus a 0.10 m bedding layer.
- Larger plot area and higher enclosure cost than a compact substation.
Typical configurations and substation codes
| Rating | Substation code | Enclosure | Enclosure weight | MV panels | Metering | LV main device | LV outgoing feeders |
|---|---|---|---|---|---|---|---|
| 100 kVA | ENG-B100-15S-LT-06-KN1 | KSW 2.55 x 3.20 m | approx. 17.8 t | L+T, HH 10 A | LV, 150/5 A | switch-disconnector 250 A | 6 x NH1 250 A |
| 160 kVA | ENG-B160-15S-LT-06-K | KSW 2.55 x 3.20 m | approx. 17.8 t | L+T, HH 16 A | LV, 250/5 A | switch-disconnector 400 A | 6 x NH2 400 A |
| 250 kVA | ENG-B250-15S-LT-06-K | KSW 2.55 x 3.20 m | approx. 17.8 t | L+T, HH 25 A | LV, 400/5 A | switch-disconnector 630 A | 6 x NH2 400 A |
| 400 kVA | ENG-B400-15S-LPT-06-K ready set | KSW 2.55 x 4.00 m | approx. 20.7 t | L+P+T, HH 31.5 A | MV, 20/5 A | switch-disconnector 800 A | 6 x NH2 400 A |
| 630 kVA | ENG-B630-15S-LLPT-08-K ready set | KSW 2.55 x 4.60 m | approx. 23.7 t | L+L+P+T, HH 40 A | MV, 25/5 A | switch-disconnector 1250 A | 8 x NH2 400 A |
| 630 kVA | ENG-B630-15S-LPT-06-K ready set | KSW 2.55 x 4.00 m | approx. 20.7 t | L+P+T, HH 40 A | MV, 25/5 A | switch-disconnector 1250 A | 6 x NH2 400 A |
| 630 kVA, na 1000 kVA | ENG-B630-15S-LPT-06-KD1000 ready set | KSW 2.96 x 4.56 m | approx. 28 t | L+P+T, HH 40 A | MV, 25/5 A | air circuit breaker 1600 A, Icu min. 24 kA | 6 x NH2 400 A |
| 800 kVA | ENG-B800-15S-LPT-08-K | KSW 2.96 x 4.56 m | approx. 28 t | L+P+T, HH 50 A | MV, 40/5 A | air circuit breaker 1250 A, Icu min. 20 kA | 8 x NH2 400 A |
| 1000 kVA | ENG-B1000-15S-LPV-08-K ready set | KSW 2.96 x 4.56 m | approx. 28 t | L+P+V, circuit breaker | MV, 40/5 A | air circuit breaker 1600 A, Icu min. 24 kA | 8 x NH2 400 A |
| 1250 kVA | ENG-B1250-15S-LPV-10-K | KSW 2.96 x 4.56 m | approx. 28 t | L+P+V, circuit breaker | MV, 50/5 A | air circuit breaker 2000 A, Icu min. 30 kA | 10 x NH2 400 A |
| 1600 kVA | ENG-B1600-15S-LPV-10-K | custom, multi-segment | per design | L+P+V, circuit breaker | MV, 75/5 A | air circuit breaker 2500 A, Icu min. 39 kA | 10 x NH2 400 A |
| 2 x 400 kVA | ENG-B2x400-15S-LPTT-08-K | KSW 2.55 x 6.00 m | approx. 29.4 t | L+P+T+T, HH 31.5 A | MV, 40/5 A | 2 x switch-disconnector 800 A | 8 x NH2 400 A per section |
| 2 x 630 kVA | ENG-B2x630-15S-LPTT-08-K | KSW 2.55 x 6.00 m | approx. 29.4 t | L+P+T+T, HH 40 A | MV, 50/5 A | 2 x switch-disconnector 1250 A | 8 x NH2 400 A per section |
| 2 x 800 kVA | ENG-B2x800-15S-LPTT-10-K | KSW 2.96 x 6.96 m | approx. 40.1 t | L+P+T+T, HH 50 A | MV, 75/5 A | 2 x air circuit breaker 1250 A, Icu min. 20 kA | 10 x NH2 400 A per section |
| 2 x 1000 kVA | ENG-B2x1000-15S-LPVV-10-K | KSW 2.96 x 7.16 m | approx. 42.5 t | L+P+V+V, circuit breaker | MV, 100/5 A | 2 x air circuit breaker 1600 A, Icu min. 24 kA | 10 x NH2 400 A per section |
Values from the Energeks station configurator for a 15 kV network and MV switchgear with solid and air insulation. Enclosure weights are indicative, without equipment and transformer. Click a code to open the configuration in the configurator.
Plan, elevations and single-line diagram
Drawings of a sample configuration from the station configurator. The full drawing set for any configuration can be downloaded in the configurator without registration (in Polish).
Clamps and covers on the transformer
TOC-1 LV clamps
Standard in substations up to 630 kVA: horizontal, lugless, set of 3 x /U and 1 x /N; M12, M20 or M30 selected to suit the rating.
View product
OZNN covers
4 insulating covers for LV clamps made of flexible self-extinguishing plastic, fitted after the cables are connected.
View productMK 5 flat clamps
For a future rating from 800 kVA, when the LV connection has 3 or more cables per phase.
From substation code to quotation
Choose a type
A substation type or a ready set with a configuration that recurs most often in projects.
Adjust in the configurator
Rating, voltage, MV panels, metering, feeders and options; each configuration gets a substation code.
Download documents
Technical design, data sheet, single-line diagram, drawings and bill of materials, no login.
Request a quote
Send the substation code, location and date. Price on request.
One supplier for substation and transformer
SF6-free MV switchgear
Solid and air insulation, air insulation or a gas with GWP below 1. In line with EU Regulation 2024/573.
MarkoEco2 transformer
Hermetically sealed oil-immersed, losses to Ecodesign Tier 2, 60-month warranty. Cast resin TeoEco2 on request.
Documentation at once
Technical design for adaptation by your designer, data sheet, drawings and bill of materials from the configurator, no registration.
18 weeks with transport
Standard lead time of 18 weeks from order, transport to the site specified by the customer.
Open the configurator (The configurator and the shop are in Polish; documents can be downloaded without registration.)
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