Stacja typu Mzb2 20/630 (1000)
Height of the main structure of the substation:
Standard 2300 mm
Optional 2650 mm / 2850 mm

Placement of equipment

Mzb2 (2,9x2,1) 20/630-4"a”
Mzb2 (2,9x2,1) 20/630-4”a”
Mzb2 (2,9x2,1) 20/630-4"b”
Mzb2 (2,9x2,1) 20/630-4”b”
Mzb2 (2,9x2,1) 20/1000-4"a”
Mzb2 (2,9x2,1) 20/1000-4”a”
1 Walls, 90 mm thick - standard
2 Ventilation louvres IP 23D - standard, IP 43 - optional
3 Doors: solid or with ventilation louvres, IP 23D - standard, IP 43 - optional
4 Transformer
5 LV switchgear
5a AMI cabinet / Smart Grid / telemetry / auxiliary
6 MV switchgear

Electrical diagram

Schemat elektryczny stacji Mzb2 20/630 (1000)

Optional equipment was marked with red on the electrical diagram.

Technical parameters / configuration possibilities

Obudowy betonowe Mzb2
Mass / area 2,9x2,1x2,3 (2,9x2,1x2,85)
Main structure 7 500 (8 600) kg
Concrete roof 2 200 kg
Metal roof 400 kg
Usable area 5,22 m2
Technical parameters / configuration possibilities
Transformer* (4) Maximum power / dimension 1000 kVA / 1150 x 1750 x 1850 [mm]
Internal arc resistance classification IAC-AB-20 kA-1s
Enclosure class up to 10 (depending on configuration)
Electrical parameters of switchgears MV LV
Rated voltage up to 25 kV up to 0,8 kV
Rated current 630 A up to 1600 A
Rated short-time withstand current up to 25 kA (1s) up to 35 kA (1s)
Rated peak withstand current up to 63 kA up to 77 kA
Switchgear** Type Maximum number of bays
LV (5) RN-W 12 (for h = 2300) / 15 (for h = 2850)
MV (6) TPM 4 (WLLL or LLLT)
TPM Kompakt (only for h=2850) 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