Stacja typu Mzb1 20/630
Height of the main structure of the substation:
Standard 2850 mm

Placement of equipment

Mzb1 20/630-4"a”
Mzb1 20/630-4”a”
Mzb1 20/630-3"b”
Mzb1 20/630-3”b”
Mzb1 20/630-1"b”
Mzb1 20/630-1”b”
1 Walls, 120 mm thick - standard, 90 mm thick - optional
Walls without holes - REI 120 fire integrity class
2 Ventilation louvres IP 23D - standard, IP 43 - optional
In ventilation louvres mounted in walls with fire integrity class,
fire dampers are installed (e.g. EI 60 or EIS 120) - optional
3 Doors: solid or with ventilation louvres, IP 23D - standard, IP 43 - optional
Doors with fire resistance e.g EI 60 or EI 120 - optional
4 Transformer
5 LV switchgear
5a AMI cabinet / SMART GRID / telemetry / auxiliary
6 MV switchgear

Electrical diagram

Schemat elektryczny stacji Mzb1 20/630

Optional equipment was marked with red on the electrical diagram.

Technical parameters / configuration possibilities

Obudowy betonowe Mzb1
Mass / area 3,06x1,71 (3x1,65)
Main structure 9 000 (8 000) kg
Concrete roof 2 000 kg
Usable area 4,06 m2
Technical parameters / configuration possibilities
Transformer* (4) Maximum power / dimension 630 kVA / 950 x 1550 x 1850 [mm]
Internal arc resistance classification IAC-AB-20 kA-1s
Enclosure class 10
Electrical parameters of switchgears MV LV
Rated voltage up to 25 kV up to 0,69 kV
Rated current 630 A up to 1250 A
Rated short-time withstand current up to 25 kA (1s) up to 25 kA (1s)
Rated peak withstand current up to 63 kA up to 55 kA
Switchgear** Type Maximum number of bays
LV (5) RN-W 12
MV (6) Rotoblok (1000 mm) 1 (possibility only in „b” version)
TPM / TPM Kompakt 3 (TLL or WLL) / 4 (LLTL)

* Transformer inserted from above, before the roof is attached.

** Detailed selection of switchgears and their equipment is listed in chapters dedicated to individual devices in the catalogue. Example layouts of switchgears and corresponding substation configurations are specified in parentheses. The possibility of installing other types and configurations of switchgears should be arranged every time with the substation manufacturer.

Additional information