Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Pole mounted sub stations are used for............ distribution
Primary
Secondary
Both A and B
None of the above
Secondary
Pole-mounted substations are compact outdoor distribution substations specifically designed for secondary distribution networks. They are typically used to step down the distribution voltage (e.g., 11 kV) to the consumer utilization voltage (e.g., 400V/230V).
Pole-mounted substations are compact outdoor distribution substations specifically designed for secondary distribution networks. They are typically used to step down the distribution voltage (e.g., 11 kV) to the consumer utilization voltage (e.g., 400V/230V).
VsecondaryтАЛ=KVprimaryтАЛтАЛ тАФ where K is the transformer turns ratio
S=3тАЛ├ЧVLтАЛ├ЧILтАЛ тАФ apparent power calculation for 3-phase secondary output
The substation consists of a pole-mounted transformer connected to the high-voltage distribution feeder through drop-out fuses and lightning arresters. The transformer uses electromagnetic induction to convert high primary distribution voltage to low secondary voltage, which is then fed into the local low-voltage network via a low-tension distribution board (LTDB) mounted on the same or adjacent pole.
Used for step-down of distribution voltage levels.
Installed on H-poles or 4-pole structures depending on transformer capacity.
Typical ratings range from 16 kVA to 500 kVA.
Cost-effective solution for rural and semi-urban electrification.
Requires minimal ground space
Easy to install and maintain
Economical for low-density load areas
Limited power handling capacity
Exposed to harsh environmental conditions
Difficulty in performing major repairs on-site
Rural electrification
Feeding individual industrial units
Supplying residential localities
Primary substations are usually indoor or larger outdoor grid substations that handle bulk transmission voltages (33kV/66kV and above).
Secondary distribution substations are the final step in the voltage conversion before reaching the consumer.
B is correct тАФ Pole-mounted substations are specifically designated as secondary substations to provide low-voltage supply to end users.
Remember that 'Primary' usually refers to transmission or sub-transmission levels, while 'Secondary' almost exclusively refers to the low-voltage distribution level.