RELAY COORDINATION SETTINGS

Characteristics of relay Coordination

In all interconnected power systems, relay protection is the primary instrument. These systems isolate fault in all connected power systems, a relay protection device is a primary instrument. These systems separate fault locations with a healthier network. You can detect a fault by monitoring several changes. These are voltage dip, current changes, frequency, temperature, etc. However, only proper relay coordination ensures fast and reliable relay operation.

A relay system must operate correctly. Also, it must not work incorrectly. The degree of certainty in these situations is reliability. In short, how sound the protection system is, decides its reliability.

A protection system must isolate the minor portion of the fault condition, making it more selective, limiting service gaps, and ensuring continuous service.

A protection system must be fast. It should isolate the faulty areas in minimum time. It leads to less thermal stress. Also, it minimizes the short circuit damage to equipment.

A power system protection relay should be simple. You can find and correct faults quickly in a simple system.

A sensitive protection system detects minor fault conditions in no time. Sensitivity is essential in high impedance faults.

An efficient protection system will require a considerable cost. However, the best would be to achieve maximum protection in budget.