MRw 20/630-1. Station skid dedicated to emergency power supply

Technical parameters, electrical diagram, downloads, a a description of the substation on skids powered overhead line type MRw20/630-1 production ZPUE S.A.

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The station is dedicated to, among others: back-up power with power supply from overhead or cable lines.

For over 20 years, the ZPUE S.A. company has been manufacturing stations in aluminum and aluzinc MRw type housings, which are delivered to the domestic and European markets.
We offer stations designed for the profes-sional power engineering industry as well as solutions dedicated to aggregate and mineral open-cast mines, rail transport, wind farms, photovoltaic power stations, and biogas plants. Thanks to the company’s own means of transport, we can deliver fully-equipped stations to their assembly destinations.

Station type MRw 20/630-1. Station on the skids - sample solution

Top view of the station type MRw 20/630-1
Top view of the station type MRw 20/630-1
Electrical diagram of the station type MRw 20/630-1
Electrical diagram of the station type MRw 20/630-1
Front elevation of the station type MRw 20/630-1
Front elevation of the station type MRw 20/630-1

Electrical equipment

Depending on the destination, stations are equipped with MV switchgears of the company’s own production:

  • MV – primary energy distribution: RELF, RELF ex, RXD, RXD 36.
  • MV – secondary energy distribution: Rotoblok, Rotoblok SF, Rotoblok VCB, TPM, or other after consultation with the manufacturer.

On the low voltage side, switchgears are used, such as: RN-W, ZR-W, Instal-Blok, Sivacon, or other after consultation with the manufacturer.

Station parameters

   MV LV
Ur - Rated voltage up to 36 kV up to 1000 V
Ir - Rated continuous current up to 4000 A up to 6300 A
IK - Rated short-time withstand current up to 40 kA (3s) up to 105 kA (3s)
IP - Rated peak withstand current up to 100 kA up to 231 kA
fr - Power frequency withstand 50/60 Hz
Maximum transformer power T1/T2 up to 4000 kVA
Protection degree IP23D up to IP43 (IP55)

{tab Station construction} {tab Colouristics}


Housing colour door, shutters, roof
RAL 9016 RAL 9016
RAL 7032 RAL 7032
RAL 7023 RAL 7023
RAL 5010 RAL 5010


  1. The colours presented in the table may appear different in reality! While choosing colours, always compare them with the original colour pallets.
  2. It is possible to make a design accord-ing to individual architectural re-quirements taking into consideration all the available means and materials which are used to finish metal surfac-es.
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ZPUE S.A., as one of few companies that manu-factures prefabricated container stations, has its own fleet. Transport services provided by the company are aimed to lower the costs of trans-porting ZPUE S.A. devices and to improve the quality of customer service. We offer a transport set with a total permissible weight of 70 tonnes, which can transport even 50 tonnes of load. We have the latest generation of vehicles with Euro 6 exhaust emission (a norm of limiting exhaust emission by new vehicles sold in the European Union).

Flota ZPUE


Przykład transportu stacji transformatorowej produkcji ZPUE

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Mounting of the station is presented accord-ing to an example of MRw 20/2x630-6 station.
The fully equipped station is delivered to its destination mounting place.
The station should be mounted on ZPUE S.A. prefabricated F-1 type foundation blocks or on a cast-in-place strip foundation.
The first step in mounting such a station on F-1 type foundation blocks is trench excavation. External grounding of the station should be made in the prepared trench. It is recom-mended that it be made in the form of a grounding outer ring or another form, in accordance with local requirements regarding the grounding of electrical power devices.
Under the F-1 foundation blocks, sand and gravel ballast should be used with a final thickness of at least 20 cm (after compacting). The thickness of the base made of sand and gravel must be adapted to local soil-water conditions and the frost zone. The sand and gravel ballast area must be leveled for the station, and the quality of the grounding prepared should be confirmed by a certificate of final acceptance.
F-1 foundation blocks should be mounted on such a prepared place, and then the station must be leveled.
Cover the F-1 foundation blocks gradually with a 20cm concentrated layer of filter ground.
Particular attention should be paid while covering the place where the cables enter to the ducts, because mechanical compacting can cause damage to these elements. It is important that the F-1 foundation blocks should not extend less than 10 cm above the finished area.
Placing on difficult and complicated ground and water conditions, and in mining and post-mining areas should only be performed after the drawing up of an individual project. It should be done by authorized engineering- geological designers, under qualified con-struction supervision.
Other mounting solutions of the stations are presented in points 11.1 and 11.2. Such stations are placed on the subsoil.

Posadowienie stacji MRw


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