Search results with tag "Directional overcurrent"
Protection Basics - IEEE Region 5
r5.ieee.orgNov 18, 2019 · Understand Basic Protection Principles • Overcurrent (50, 51, 50N, 51N) • Directional overcurrent (67, 67N) • Distance (21, 21N) • Differential (87) Overcurrent Relays Protect Radial Lines = LOAD ++ Source Line LOAD E I Z ZZ = FAULT + Source Line E I Z m•Z I
MEDIUM VOLTAGE SWITCHGEAR - alfanar
www.alfanar.comC - Power System Protection 28 a- Basic Requirements of Protection System 28 b- Relays 29 1- Protective Relays 29 • Overcurrent Relay 29 • Directional Overcurrent Relay 29 • Differential Relay 30 2- Auxiliary Relays 30 • Tripping Relays 30 • Monitoring Relays 31 • Contacts Multiplication Relays 31
![Index [fecime.org]](/cache/preview/4/b/6/f/7/6/c/b/thumb-4b6f76cbe136715f4dd742f1e6a628ee.jpg)
Index [fecime.org]
fecime.orgwww.GEMultilin.com 23 513 ANSI Standard Device Number Device No. Description ANSI Standard Device Number INDEX Device No. Description 59 Overvoltage Relay 60 Voltage or Current Balance Relay 61 Machine Split Phase Current Balance 62 Time-Delay Stopping or Opening Relay 63 Pressure Switch 64 Ground Detector Relay 65 Governor 66 Starts per Hour 67 AC Directional Overcurrent Relay