MT-10/0.4-1 X 1000

(MT) Compact transformer substations

Basic Information

Height (mm):

2660

Width (mm):

3150

Depth (mm):

2400

Techniniai parametrai

Rated frequency:

50Hz

Degree of protection:

IP44

Altitude above sea level:

≤ 2000 m

Ambient temperature:

'-35+35°C

Relative humidity:

≤ 100% (at +25°C)

Ventilation:

Passive (natural convection) / Active (mechanical forced ventilation)

Basic Information

Description

Designed for receiving 10 kV, 50 Hz electrical power and transforming it to 0.4 kV voltage for distribution to users; this is an outdoor service transformer substation connected to external networks via underground cables.

Enclosure:

The substation consists of a reinforced concrete foundation and a metal enclosure with a removable roof. The substation is divided into three sections separated by partitions: 10 kV compartment, power transformer compartment, 0.4 kV compartment.

Standards:

LST EN 62271-202

10 kV voltage compartment

Rated voltage: 10 kV

10 kV

Maximum voltage:

12 kV

Test voltage (50Hz, 1 min):

28 kV

Rated frequency:

50 Hz

Impulse test voltage (1.2/50 μs):

75 kV

switchgear compartment maintenance:

External

Gas-Insulated Switchgear insulation:

Air or SF6 gas

Network neutral:

Isolated

Degree of protection:

IP3X

Service category:

LSC2A

Switchgear

According to AB 'ESO' technical requirements

Surge arresters:

According to AB 'ESO' technical requirements

0.4 kV voltage compartment

Rated current of 0.4 kV busbars:

≥1900 A

Short-circuit current of 0.4 kV busbars:

25 kA

Peak short-circuit current of 0.4 kV busbars:

40 kA

Maintenance of 0.4 kV section:

One-sided - external

Rated insulation voltage of devices:

690 V

Additional information

Medium voltage:

Installed with SF6 gas insulation, compliant with standards LST EN 62271-1, LST EN 62271-100, LST EN 62271-200, ABB SAFE PLUS or SAFE RING, SCHNEIDER ELECTRIC RM6 or FBX, SIEMENS 8DJH switchgear; location for mounting the TSPĮ panel.

Transformer:

"Prepared space with an oil collection pit for a three-phase hermetic oil transformer; (≤1600x1100x1800) up to 1000 kVA.

Low voltage:

Incoming fuse-switch block;Space for control metering;Space for commercial metering (KAS);Designated space for up to 8 linear fuse-switch blocks;Aluminum (Al) or Copper (Cu) busbars with pressed-in bushings (for convenient mounting of fuse-switch blocks);Auxiliary panel (SRS).

Grounding conductors:

Transformer construction: 10 mm²; Doors: 4 mm².

Internal use panel

Plug socket ~230V with grounding contacts, protected by RCCB and 1-phase C16A circuit breaker; 1-phase C6A circuit breaker for protection of 10 kV short-circuit indicator power supply; 1-phase C6A circuit breaker for lighting protection.

Verification metering

One location (three-phase) is allocated for the control electrical metering device and test terminal in the 0.4 kV distribution equipment compartment; upon order, current transformers are installed and connected.

Equipment details:

The power transformer is loaded from the top by removing the roof. The transformer is placed on wheels into designated fixed positions that prevent movement. MV – Medium Voltage compartment with equipment; LV – Low Voltage compartment with equipment; KAS – Commercial metering.

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