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TechnoCrazed

Tag: current protection

25.13 Auxiliary and lockout (86) relays Education

25.13 Auxiliary and lockout (86) relays

adminFeb 3, 2020
An important type of “accessory” relay, especially for legacy electromechanical protective relays, is the...
25.12 Distance (21) protection Education

25.12 Distance (21) protection

adminFeb 3, 2020
A form of protection against faults on long-distance power lines is called distance relaying, so named...
25.11 Directional overcurrent (67) protection Education

25.11 Directional overcurrent (67) protection

adminFeb 3, 2020
While 50 and 51 (instantaneous and time overcurrent) relay functions monitor line current magnitude and guard against...
25.10 Differential (87) current protection Education

25.10 Differential (87) current protection

adminFeb 3, 2020
One of the fundamental laws of electric circuits is Kirchhoff’s Current Law, which states the algebraic sum of...
25.9 Instantaneous and time-overcurrent (50/51) protection Education

25.9 Instantaneous and time-overcurrent (50/51) protection

adminFeb 3, 2020
Perhaps the most basic and necessary protective relay function is overcurrent: commanding a circuit breaker to...
25.8 ANSI/IEEE function number codes Education

25.8 ANSI/IEEE function number codes

adminFeb 3, 2020
In the United States, the ANSI and IEEE organizations have standardized a set of numerical codes referring to...
25.7 Introduction to protective relaying Education

25.7 Introduction to protective relaying

adminFeb 3, 2020
Circuit breakers used in residential, commercial, and light industrial service are self-tripping devices: they...
25.4 Single-line electrical diagrams Education

25.4 Single-line electrical diagrams

adminFeb 3, 2020
Electrical power grids primarily consist of three-phase AC circuits. This means most power lines...
25.3 Interconnected generators Education

25.3 Interconnected generators

adminFeb 3, 2020
Any power grid large enough to meet the demand of an entire nation must have multiple generators drawing from multiple...

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