MT(m)-10/0.4-1 X 160
MT(M) Small compact transformer substation
| Dimensions (H.W.D.), mm | |
|---|---|
| Number of transformers | |
| Transformer rated voltage MV/LV, kV | |
| Transformer rated voltage MV/LV, kV | |
| Degree of protection: | |
| Altitude above sea level: | |
| Ambient temperature: | |
| Relative humidity: | ≤ 100% (at +25°C) |
| Ventilation: | Passive (natural convection) / Active (mechanical forced ventilation) |
| Standards: | LST EN 62271-202 |
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.
10 kV voltage compartment
Rated voltage: 10 kV
10kV
Maximum voltage:
12kV
Test voltage (50Hz, 1 min):
28kV
Rated frequency:
50Hz
Impulse test voltage (1.2/50 μs):
75kV
switchgear compartment maintenance:
External
Gas-Insulated Switchgear insulation:
Air ; 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:
≥250 A
Short-circuit current of 0.4 kV busbars:
25kA
Peak short-circuit current of 0.4 kV busbars:
40kA
Maintenance of 0.4 kV section:
One-sided - external
Rated insulation voltage of devices:
690V
Additional information
Medium voltage:
Installed by SCHNEIDER ELECTRIC RM6 cages, but other ABB SafeRing, SafePlus, SCHNEIDER ELECTRICAL FBX, SIEMENS 8DJH cages conforming to LST EN 62271- 200 can be installed.
Transformer:
Prepared space with an oil collection pit (≤530 liters) for a three-phase hermetic oil transformer (≤1200x870x1400 mm) up to 160 kVA power.
Low voltage:
Incoming fuse-switch block; Space for control metering; Space for commercial metering (KAS); Designated space for up to 3 linear fuse-switch blocks; Aluminum busbars with pressed-in bushings (for convenient mounting of fuse-switch blocks); Space for generator connection; Auxiliary panel (SRS); Space for TSPĮ panel installation.
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; 1-phase C16 circuit breaker for protection of TSPĮ equipment power supply.
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.
