# Which is the purpose of back up protection?

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The backup protection provides the backup to the main protection during a short circuit whenever it fails in operation or is cut out for repairs. The backup protection is essential for the proper working of the electrical system.

## What is purpose of backup protection Mcq?

Backup protection is provided so as to: Increase sensitivity. Increase speed of protection system. To act in case of failure of primary protection.

## What is primary and backup protection?

Primary protection (Main protection) is the essential protection provided for protecting an equivalent/machine or a part of the power system. As a precautionary measure, addition protection is generally provided and is called Backup Protection.

## What are different types of back up protection?

Types of Secondary or backup protection

• Relay Backup Protection.
• Breaker Backup Protection.
• Remote Backup Protection.
• Centrally Co-ordinate Backup Protection.

## What is backup protection relay?

Definition of backup relay

: a secondary relay to protect a power system against faults in the event of failure of the primary relay to function as desired.

## What is digital protection?

Digital protection is based on the use of computers in power line relaying. … The text covers the mathematical basis of numerical techniques and relay algorithms, the basic elements of digital protection and the fundamentals underlying the commonest algorithmic forms, particularly as applied to line protection.

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## Which type of backup protection is widely used for protection of transmission line?

Types of Backup Protection:

Relays backup protection: Single circuit breaker is used to for both primary and backup relays. Breaker Backup protection: Separate circuit breakers is used for both protections in the same station.

## Which type of backup protection is widely used in power system?

Relay Back-up : in this method , Different breakers are provided for main and back-up protection, both the breakers being in the same station. Breaker Back-up : In this method, separate breakers are provided for primary and backup protection.

## What is secondary protection?

Secondary protection is the term used to describe protection between the solar inverter and the grid. It is comparable to Primary Protection, which is protection within the inverter.