Communication devices in the relay protection room
Let's start with brief description of seven most known and most used communication medias used in power system communications (in terms of protection and automation):.
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How to connect protection inputs to relay protection
The objective of relay protection is to quickly isolate a faulty section from both ends so that the rest of the system can function satisfactorily.
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The preparedness of relay protection refers to
Relay protection is the discipline of designing schemes that detect faults, coordinate relays, and isolate equipment without outages. Protective relays and devices have been developed over 100 years ago to provide "lastline"of defense for the electrical systems. They are intended to quickly identify a fault and isolate it so the balance of the system continue to run under normal conditions.
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Cable trench under relay protection
Cable joint breakdown accidents have occurred frequently in recent years and have gradually become an important concern of the power maintenance department.
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Relay protection according to different functions
The various protective functions available on a given relay are denoted by standard. For example, a relay including function 51 would be a timed overcurrent protective relay. Types of Protective Relays: Protective relays are categorized by their mechanism (electromagnetic, static, mechanical) and function (time-based, current, voltage). Its main purpose is to safeguard electrical equipment like transformers, generators, and transmission lines from damage due to. It functions as a watchdog by constantly surveying multiple system components including voltage, current, frequency, and phase angle. A protective relay definition is; a switchgear device used to detect faults & begin the circuit breaker operation to separate the faulty element of the system.
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