The outdoor type substation has the following advantages over indoor sub-station :-

1. All equipments are within sight and ACCESSIBLE ; faults and defects can therefore, be easily located and rectified.
2. The substation equipments can be spaced sufficiently apart.
3. The effect of fault in one SECTION do not affect the healthy section.
4. The cost of erected is comparatively less as no large buildings are required to be erected to house the substation equipments.
5. The time required for erected is lesser.
6. Future extensions and alterations can be MADE without much difficulty.

The disadvantages of outdoor type substation are as follows :

1. As the equipments are open to atmosphere the influence of rapid fluctuation in ambient temperature, dust and dirt DEPOSITED on the equipments makes it necessary to install specially designed equipments which are costlier.
2. More space is required for the outdoor substation as buses and other live parts are bare and more clearance is necessary.
3. The various SWITCHING operations, fault repair and maintenance become difficult in rough and inclement weather.

The outdoor type substation has the following advantages over indoor sub-station :-

The disadvantages of outdoor type substation are as follows :