ABB REL 356

ABB REL 356 Current Differential Protection
Page v
Table of Contents
Outer Blinder (RU) .................................................................................................................................. 3-16
Out of Step Detection Timer (OST1) ...................................................................................................... 3-16
Out of Step Trip Way In Timer (OST2) ................................................................................................... 3-16
Out of Step Trip Way Out Timer (OST3) ................................................................................................ 3-16
Out of Step Trip Override Timer (OSOT) ................................................................................................ 3-17
Remote Setting and Time Settings ............................................................................................................... 3-17
Remote Setting (SETR).......................................................................................................................... 3-17
Time Settings (TIME, YEAR, MONTH, DAY, WDAY, HOUR, MIN) ........................................................ 3-17
Settings for Tapped Load Applications.......................................................................................................... 3-17
Introduction ............................................................................................................................................ 3-17
Settings for OTH, C0, C1 and C2 for Tapped Load Applications ............................................................. 3-18
Setting Example - General Case................................................................................................................... 3-19
Line Data ...................................................................................................................................................... 3-19
For Current Differential Measurement ..................................................................................................... 3-19
For Fault Locating and Fault Recording .................................................................................................. 3-19
For Distance Backup Protection ............................................................................................................. 3-19
Relay System Setup..................................................................................................................................... 3-19
Firmware Version (VERS) ...................................................................................................................... 3-19
System Frequency (FREQ) .................................................................................................................... 3-19
Readout in Primary Values (RP) ............................................................................................................. 3-19
Current Transformer Type (CTYP) .......................................................................................................... 3-19
Current Transformer Ratio (CTR) ............................................................................................................ 3-20
Voltage Transformer Ratio (VTR) ........................................................................................................... 3-20
Digital Fault Recording Information ............................................................................................................... 3-20
Trigger for Storing Oscillographic Data (OSC) ........................................................................................ 3-20
Trigger for Storing Fault Records (FDAT) ............................................................................................... 3-20
Ground Trigger Pick Up Level (TRGG) ................................................................................................... 3-20
Phase Trigger Pick Up Level (TRGP) ..................................................................................................... 3-21
Protection System Settings .......................................................................................................................... 3-21
Change Detector (CD) ............................................................................................................................ 3-21
Dedicated Direct Transfer Trip (DDTT) ................................................................................................... 3-21
Low Set Current Supervision (ILTS) ....................................................................................................... 3-22
Reclose Block Enable (RBEN) ............................................................................................................... 3-22
Stub/Open Breaker Timer (SOBT) .......................................................................................................... 3-22
Open Breaker (OPBR) ............................................................................................................................ 3-22
Very Low Set Phase Current Unit (IE) .................................................................................................... 3-23
Low Set Phase Unit (IPL) ....................................................................................................................... 3-23
High Set Phase Overcurrent Unit (IPH) .................................................................................................. 3-23
Low Set Ground Unit (IGL) ..................................................................................................................... 3-23
High Set Ground Overcurrent Unit (IGH) ................................................................................................. 3-24
Current Differential System Settings ............................................................................................................. 3-24
Trip Desensitizing (TDES) ...................................................................................................................... 3-24
Operating Threshold (OTH) .................................................................................................................... 3-24
Sequence Coefficients (C0, C1, C2) ....................................................................................................... 3-25
Automatic Channel Delay Measurement (ALDT)..................................................................................... 3-28
Lead/Follow Mode (LDFL) ....................................................................................................................... 3-28
Local Delay Timer (LDT)......................................................................................................................... 3-28
Unit Identification (UNID) ........................................................................................................................ 3-28
Comunication Speed Selection (KBPS) - 56/64 kbps versions only ........................................................ 3-28
Transfer Trip (TTRP) .............................................................................................................................. 3-28
Transmit Clock Source (XCLK) - 56/64 kbps versions only .................................................................... 3-28
Loopback (LPBK) ................................................................................................................................... 3-29
Transmitter Level (XMTR) - Audiotone version only................................................................................ 3-29