What is the function of Lockout Relays in Electrical Power Systems?
Lockout relays are critical components of electrical power systems that provide protection and safety. Here’s a basic description of their function:
Primary Function
Trip and prevent circuit breakers from reclosing under particular fault situations.
Operation
- Protective relays activate when a significant defect is detected.
- Once activated, they remain locked out unless manually reset.
Key Purpose
- Avoid automatic reclosing following severe faults.
- Inspect equipment before re-energising it.
- Prevent recurring harm caused by persistent problems.
Application
- Transformer protection.
- Generator protection.
- Busbar protection.
- Transmission line protection.
Types
- Electromechanical relay
- Solid state relay
- Microprocessor-based relay
Advantages
Advantages include increased system reliability, reduced equipment damage, and improved staff safety.
Lockout relays have an essential function for ensuring power system integrity and safety by preventing malfunctioning equipment from being automatically re-energised.