State True/False for the following statements:

1. Outdoor substations are costlier as compared to indoor substations.

2. Indoor substations require zero maintenance.

Question

Question

This question was previously asked in

MPPGCL JE Electrical 28 April 2023 Shift 2 Official Paper

Answer 1

The correct answer is option 4.

Explanation

Outdoor substations are usually cheaper than indoor substations because they do not require expensive building enclosures or as much insulation. Indoor substations require additional space, construction, and ventilation, making them more costly.
No substation is completely maintenance-free. Indoor substations require regular maintenance to ensure safe and reliable operation, including cleaning, checking insulation, and monitoring equipment conditions.

Difference between Indoor and Outdoor Substations:

Parameters	Indoor Substation	Outdoor Substation
Construction	The construction of the indoor substation is complicated.	The construction of the outdoor substation is not more complicated.
Voltage	These substations install up to the 66kV voltage level.	These substations install for beyond the 66kV voltage level.
Location	Generally, the indoor substations place inside the building.	The outdoor substations place outside the building.
Space Required	There is required a small space.	There is required plenty of space.
Installation	Cannot easily expand the installation of indoor substations.	Can easily expand the installation of outdoor substations.
Cost	The cost of the indoor substation is low.	The cost of the outdoor substation is high.
Fault Condition	Very easy to clear the fault.	Very difficult to clear the fault.
Maintenance	Indoor substation requires high maintenance.	Outdoor substation requires less maintenance.
Safety	Indoor substations are much safer.	Outdoor substations are not much safer.