SECTION 4
• PROTECTION AND CONTROL
TABLE OF CONTENTS
• PROTECTION AND CONTROL ......................................................................................... 4-1
INTRODUCTION.................................................................................................................................... 4-1
Using Protection and Control Functions ............................................................................................. 4-1
SETTING GROUPS ............................................................................................................................... 4-1
BESTlogic Settings for Setting Group Control ................................................................................... 4-2
Automatic Setting Group Control........................................................................................................ 4-4
Automatic Control by Monitoring Line Current ................................................................................ 4-5
Group Control by Monitoring Reclose Status ................................................................................. 4-5
Group Control by Monitoring Fuse Loss Status .............................................................................. 4-6
Operating Settings for Setting Group Control .................................................................................... 4-6
Logic Override of the Setting Group Control Function ....................................................................... 4-8
Retrieving Setting Group Control Status from the Relay ................................................................... 4-8
OVERCURRENT PROTECTION (BE1-700C) ...................................................................................... 4-9
50T - Instantaneous Overcurrent Protection with Settable Time Delay ............................................. 4-9
BESTlogic Settings for Instantaneous Overcurrent Protection ....................................................... 4-9
Operating Settings for Instantaneous Overcurrent Protection ...................................................... 4-11
Retrieving Instantaneous Overcurrent Protection Status from the Relay ..................................... 4-12
51 - Time Overcurrent Protection ..................................................................................................... 4-12
BESTlogic Settings for Time Overcurrent Protection ................................................................... 4-13
Operating Settings for Time Overcurrent Protection .................................................................... 4-14
Retrieving Time Overcurrent Protection Status from the Relay ................................................... 4-15
Programmable Curves ..................................................................................................................... 4-15
Setting Programmable Curves...................................................................................................... 4-16
46 Curve ....................................................................................................................................... 4-17
Negative-Sequence Overcurrent Protection .................................................................................... 4-17
Negative-Sequence Pickup Settings ............................................................................................ 4-17
Negative-Sequence Coordination Settings ................................................................................... 4-18
Delta/Wye Transformer Application .............................................................................................. 4-19
Generator Application ................................................................................................................... 4-19
VOLTAGE PROTECTION (BE1-700V) ............................................................................................... 4-19
24 - Overexcitation Protection .......................................................................................................... 4-19
Theory of Operation for Overexcitation Protection ....................................................................... 4-20
BESTlogic Settings for Overexcitation Protection ........................................................................ 4-21
Operating Settings for Overexcitation Protection ......................................................................... 4-22
Programmable Alarm for Overexcitation Protection ..................................................................... 4-23
Settings Example for Overexcitation Protection ........................................................................... 4-24
Retrieving Overexcitation Protection Status from the Relay ........................................................ 4-26
27P/59P - Phase Undervoltage/Overvoltage Protection .................................................................. 4-26
BESTlogic Settings for Phase Undervoltage/Overvoltage Protection .......................................... 4-27
Operating Settings for Phase Undervoltage/Overvoltage Protection ........................................... 4-28
Retrieving Phase Undervoltage/Overvoltage Protection Status from the Relay .......................... 4-29
27X/59X - Auxiliary Undervoltage/Overvoltage Protection .............................................................. 4-29
BESTlogic Settings for Auxiliary Undervoltage/Overvoltage Protection ....................................... 4-30
Operating Settings for Auxiliary Undervoltage/Overvoltage Protection ........................................ 4-31
Retrieving Auxiliary Undervoltage/Overvoltage Protection Status from the Relay ....................... 4-33
47 - Negative-Sequence Overvoltage Protection ............................................................................. 4-33
BESTlogic Settings for Negative-Sequence Overvoltage Protection ........................................... 4-33
Operating Settings for Negative-Sequence Overvoltage Protection ............................................ 4-34
Retrieving Negative-Sequence Overvoltage Protection Status from the Relay ........................... 4-35
FREQUENCY PROTECTION (BE1-700V) .......................................................................................... 4-35
81 - Over/Under Frequency Protection ............................................................................................ 4-35
BESTlogic Settings for Over/Under Frequency Protection ........................................................... 4-36
Operating Settings for Over/Under Frequency Protection ............................................................ 4-37
Retrieving Over/Under Frequency Protection Status from the Relay ........................................... 4-39
BREAKER FAILURE PROTECTION (BE1-700C) ............................................................................... 4-39
9376700990 Rev M
BE1-700 Protection and Control
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