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Multi storied buildings generally have ___substation
Outdoor
Indoor
GIS
Oil insulated substation
Indoor
Multi-storied buildings utilize indoor substations because they are compact, safer for urban environments, and eliminate the need for large outdoor plots. These installations are specifically designed with fire-resistant equipment and dry-type transformers to ensure safety within limited architectural spaces.
Multi-storied buildings utilize indoor substations because they are compact, safer for urban environments, and eliminate the need for large outdoor plots. These installations are specifically designed with fire-resistant equipment and dry-type transformers to ensure safety within limited architectural spaces.
VsecondaryтАЛ=KVprimaryтАЛтАЛ тАФ Basic transformer turns ratio calculation for voltage step-down
PlossтАЛ=I2R тАФ Governing principle for conductor sizing in indoor cabling
In an indoor substation, the high-voltage (HV) cables are brought directly into the building via underground conduits or protected shafts. The voltage is stepped down to 415V/230V using dry-type or cast-resin transformers to mitigate fire risks associated with oil-filled equipment in proximity to occupants.
Indoor substations use dry-type transformers to avoid fire hazards.
Require strict adherence to IE Rules regarding ventilation and fire suppression systems.
Space optimization is the primary design driver for high-rise buildings.
GIS (Gas Insulated Switchgear) is often used if space is extremely constrained.
Reduced risk of external interference and weather damage
Enhanced safety for surrounding population
Minimum footprint within the building structure
Requires high-cost fire protection and ventilation infrastructure
Complex maintenance due to confined space access
Transformer capacity limited by building ventilation limits
Residential multi-storied complexes
Commercial office buildings
Shopping malls and hospitals
IE Rule 51 specifies the mandatory clearances and safety requirements for electrical installations.
Option D (Oil insulated) is avoided indoors due to the high risk of fire and necessity for expensive oil-containment sumps.
B is correct тАФ Multi-storied buildings utilize indoor substations to save space and enhance safety within urban infrastructure constraints.
Always remember that 'Dry-type' is synonymous with 'Indoor' in high-rise building electrical design due to NEC and IE safety standards regarding combustible fluids.