What are the different types of digital protection schemes?
Types of protection
- High-voltage transmission network. …
- Generator sets. …
- Overload and back-up for distance (overcurrent) …
- Earth fault/ground fault. …
- Distance (impedance relay) …
- Back-up. …
- Low-voltage networks. …
What are the types of protection scheme?
It also covers principles of various power system protection relays and schemes including special power system protection schemes like differential relays, restricted earth fault protection, directional relays and distance relays etc.
How does digital privacy work?
Digital privacy (also internet or online privacy) means the protection of any data a user creates or transmits while navigating the web via a mobile or desktop device.
What are the requirements of protection of lines?
The protection scheme must satisfy the following requirements: a) Under normal conditions the breakers are not tripped. b) Under fault conditions only the breakers closest to the fault on the source side are tripped. c) If the closest breaker fails to operate, the next breaker closer to the source should trip.
What are protection devices?
Protective devices are used to maintain the primary function by means such as bringing in standby equipment when the main equipment fails or to provide protection in relation to secondary functions such as safety or environment.
What is the main objective of protection?
Ensure that each object is accessed correctly and only by allowed processes.
What is essential quality of protection?
Sensitivity. The protection must be able to distinguish between healthy and fault conditions, i.e., to detect, operate and initiate tripping before a fault reaches a dangerous condition. On the other hand, the protection must not be too sensitive and operate unnecessarily.
What are the different components of the digital relay?
A digital relay consists of the following main parts: processor, analogue input system, digital output system and independent power supply .
What is the difference between numerical relay and static relay?
A big difference between conventional electromechanical and static relays is how the relays are wired. … Electromechanical and static relays have fixed wiring and the setting is manual. Numeric relays, on the other hand, are programmable relays where the characteristics and behavior can be programmed.