Sectional Clearance In Substation

Section clearance is the distance between two sections of substation which enables a person to work on one section of a substation in a safe manner while the other section is charged.

Sectional clearance in substation. All the electrical equipment live parts will be exposed all the electrical equipment in the substation shall be arranged in such a manner to ensure the clearance space between the live parts and other equipment of the substation grounded or ungrounded. Sectional clearance or safety working clearance. It is the clearance between the different phases in a circuit or same phases in different circuits.

Substation safety clearances majority of electrical substations will be air insulated type. Majority of electrical substations will be air insulated type. All the electrical equipment live parts will be exposed all the electrical equipment in the substation shall be arranged in such a manner to ensure the clearance space between the live parts and other equipment of the substation grounded or ungrounded.

Section clearance is chosen in such a manner that phase to earth clearance is maintained between the live point and the approach of the working personnel with adequate margin. This ensures that any person working in the area cannot touch or damage the insulators accidentally. All the electrical equipment live parts will be exposed all the electrical equipment in the substation shall be arranged in such a manner to ensure the clearance space between the live parts and other equipment of the substation grounded or ungrounded.

Safety clearances in extra high voltage substation are very much important to maintain the basic insulation level of the system. The ground clearance is the distance between ground level and bottom of any insulator in an outdoor substation. Indoor substation minimum clearances clearance of conductor on tower norms of protection for ehv class power transformers the bottom most portion of any insulator or bushing in service should be at a minimum height of 2500 mm above ground level.

Sectional clearance is the distance between the live parts of the phases and the terminals of the work section. This is the minimum clearance between the live conductor and the limits of work where spacial clearance is related to the safety of the operating personnel. This clearance is kept as 2 5 meters for all voltage levels.

Adequate clearances should be provided for safety of the operating and maintenance personnel and also to prevent any conducting path between the phases. The limits of work section may be ground or the. This limits of work section or maintenance section may be a platform or ground on which operation personnel can carry out his task safely.