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
Capacity of a pole mounted substations is generally up to
500 kVA
200 kVA
400 kVA
1000 kVA
200 kVA
A pole-mounted substation is a distribution substation where the transformer is mounted on a single or H-pole structure. Due to mechanical constraints related to the weight and load-bearing capacity of the utility poles, the capacity of these transformers is typically restricted to 200 kVA.
A pole-mounted substation is a distribution substation where the transformer is mounted on a single or H-pole structure. Due to mechanical constraints related to the weight and load-bearing capacity of the utility poles, the capacity of these transformers is typically restricted to 200 kVA.
S=3тАЛ├ЧVLтАЛ├ЧILтАЛ тАФ Apparent power capacity of a 3-phase transformer
IratedтАЛ=3тАЛ├ЧVLтАЛSтАЛ тАФ Calculation of full load current based on substation rating
These substations step down the high voltage primary distribution (typically 11 kV or 22 kV) to low voltage (415 V) for consumer use. They consist of a drop-out fuse, lightning arrestor, and a pole-mounted transformer. The design assumes the structure can safely support equipment weights corresponding to ratings up to 200 kVA; exceeding this often requires a plinth-mounted or indoor substation design.
Used for step-down distribution of electricity to residential and commercial loads.
Installed on overhead transmission poles to save ground space.
Commonly uses an outdoor, oil-immersed, self-cooled transformer.
Subject to weight restrictions determined by the pole structure strength.
Requires very little ground space.
Cost-effective installation in rural and semi-urban areas.
Quick and easy to maintain.
Limited power capacity compared to plinth-mounted types.
Equipment is exposed to harsh atmospheric conditions.
Higher risk of bird or animal-induced faults.
Rural electrification networks.
Small-scale township distribution.
Temporary power supply for construction sites.
Ratings above 200 kVA or 500 kVA generally require mounting on a civil foundation (plinth) for safety and structural stability.
Option A (500 kVA) is typically associated with ground-mounted or substation kiosks, not standard pole-mounted assemblies.
B is correct тАФ Standard pole-mounted substations are limited to 200 kVA due to the mechanical strength and weight-bearing limitations of the mounting poles.
Always remember that for competitive exams, 'pole-mounted' implies weight limitations, whereas 'plinth-mounted' or 'unit substation' allows for higher ratings (500 kVA and above).