Chapter 30
System Protection
계기 변압기
Instrument transformers include voltage and current transformers.
The primary winding of a current transformer typically has a single turn or a conducting ...
과전류 계전기
Overcurrent relays, connected to the secondary current of a current transformer, are crucial for protecting circuits.
There are two types: Instantaneous ...
방사형 시스템 보호
Radial systems utilize time-delay overcurrent relays to minimize load interruption. When a fault occurs, the nearest breaker opens first, while upstream ...
리클로저 및 퓨즈
Automatic circuit reclosers protect distribution circuits by interrupting and automatically reclosing an AC circuit according to a preset sequence.
...
방향성 계전기
Directional relays, designed for unidirectional fault currents, improve power system safety and efficiency.
On power lines with a directional relay, ...
보호 구역
In power systems, the entire setup is divided into protective zones. If a fault occurs within a zone, it is isolated, protecting the rest of the system.
...
임피던스 릴레이를 통한 라인 보호
Coordinating time-delay overcurrent relays in complex radial systems can be challenging, as can directional overcurrent relays in multi-source ...
차동 계전기
Differential relays protect generators, buses, and transformers.
In a fault-free generator, identical current transformers keep the relay inactive as no ...
파일럿 및 숫자 릴레이(Pilot and Numeric Relaying)
Pilot relaying, a form of differential protection, utilizes communication channels to compare terminal quantities on widely spread transmission lines. It ...
Copyright © 2025 MyJoVE Corporation. 판권 소유