ABB RELION 620 Series Technical Manual page 16

Table of contents
10
Settings.......................................................................................294
Monitored data............................................................................294
Technical data............................................................................ 295
Voltage per hertz protection 24....................................................... 295
Identification............................................................................... 295
Function block............................................................................ 296
Functionality............................................................................... 296
Operation principle..................................................................... 296
Timer characteristics.................................................................. 300
Application.................................................................................. 305
Signals........................................................................................310
Settings.......................................................................................311
Monitored data............................................................................312
Technical data............................................................................ 313
Three-phase remnant undervoltage protection 27R........................313
Identification............................................................................... 313
Function block............................................................................ 314
Functionality............................................................................... 314
Operation principle..................................................................... 314
Application.................................................................................. 316
Signals........................................................................................317
Settings.......................................................................................317
Monitored data............................................................................318
Technical data............................................................................ 318
Frequency protection............................................................................ 318
Frequency protection 81..................................................................318
Identification............................................................................... 318
Function block............................................................................ 319
Functionality............................................................................... 319
Operation principle..................................................................... 319
Application.................................................................................. 325
Signals........................................................................................326
Settings.......................................................................................326
Monitored data............................................................................327
Technical data............................................................................ 327
Load shedding and restoration 81LSH............................................ 327
Identification............................................................................... 327
Function block............................................................................ 328
Functionality............................................................................... 328
Operation principle..................................................................... 328
620 series ANSI
Technical Manual