ABB REL 356

ABB REL 356 Current Differential Protection
Page iv
Table of Contents
Reclose Block Enable (RBEN) ................................................................................................................. 3-6
Stub/Open Breaker Timer (SOBT) ............................................................................................................ 3-6
Open Breaker (OPBR) .............................................................................................................................. 3-6
Very Low Set Phase Current Unit (IE) ...................................................................................................... 3-7
Low Set Phase Unit (IPL) ......................................................................................................................... 3-7
High Set Phase Overcurrent Unit (IPH) .................................................................................................... 3-7
Low Set Ground Unit (IGL) ....................................................................................................................... 3-7
High Set Ground Overcurrent Unit (IGH) ................................................................................................... 3-7
Current Differential System Settings ............................................................................................................... 3-8
Trip Desensitizing (TDES) ........................................................................................................................ 3-8
Operating Threshold (OTH) ...................................................................................................................... 3-8
Sequence Coefficients (C0, C1, C2) ......................................................................................................... 3-9
Automatic Channel Delay Measurement (ALDT)..................................................................................... 3-11
Lead/Follow Mode (LDFL) ....................................................................................................................... 3-11
Local Delay Timer (LDT)......................................................................................................................... 3-11
Unit Identification (UNID) ........................................................................................................................ 3-11
Communication Speed Selection (KBPS) - 56/64 kbps versions only ..................................................... 3-12
Transfer Trip (TTRP) .............................................................................................................................. 3-12
Transmit Clock Source (XCLK) - 56/64 kbps versions only .................................................................... 3-12
Loopback (LPBK) ................................................................................................................................... 3-12
Transmitter Level (XMTR) - Audiotone version only................................................................................ 3-12
Receiver Level Signal Detector (RLSD) - Audiotone version only ........................................................... 3-12
Fault Locator and Distance System Common Settings ................................................................................. 3-12
Ohms Per Unit Distance (XPUD)............................................................................................................ 3-12
Distance Unit Type (DTYP) .................................................................................................................... 3-12
Positive Sequence Impedance Angle (PANG) ........................................................................................ 3-13
Zero Sequence Impedance Angle (GANG) ............................................................................................. 3-13
Zero Sequence to Positive Sequence Impedance Ratio (ZR) ................................................................. 3-13
Backup System Settings - Version with Distance Option only ...................................................................... 3-13
Backup System Enable (BKUP) ............................................................................................................. 3-13
Loss of Potential Block (LOPB).............................................................................................................. 3-13
Directional Units Settings ............................................................................................................................. 3-13
Forward Directional Phase Unit (FDOP) ................................................................................................. 3-13
Forward Directional Ground unit (FDOG) ................................................................................................ 3-13
Ground Directional Unit Polarization (DIRU)............................................................................................ 3-14
Ground Backup Unit Settings - Version with Distance Option only ................................................................ 3-14
Medium Set Ground Overcurrent Unit (IOM) ........................................................................................... 3-14
Ground Overcurrent Timer (TOG) ........................................................................................................... 3-14
Zone 2 and Zone 3 Settings - Versions with Distance Option only ................................................................ 3-14
Zone 2 Phase Reach (Z2P) .................................................................................................................... 3-15
Zone 2 Phase Timer (T2P) ..................................................................................................................... 3-15
Zone 2 Forward Ground Reach (Z2GF) ................................................................................................... 3-15
Zone 2 Reverse Ground Reach (Z2GR) .................................................................................................. 3-15
Zone 2 Ground Timer (Z2G) ................................................................................................................... 3-15
Zone 3 Phase Reach (Z3P) .................................................................................................................... 3-15
Zone 3 Phase Timer (T3P) ..................................................................................................................... 3-15
Zone 3 Forward Ground Reach (Z3GF) ................................................................................................... 3-15
Zone 3 Reverse Ground Reach (Z3GR) .................................................................................................. 3-15
Zone 3 Ground Timer (T3G) ................................................................................................................... 3-15
Out of Step Settings - Versions with Distance Option only ........................................................................... 3-15
Out of Step Trip (OST) ........................................................................................................................... 3-16
Out of Step Block (OSB) ........................................................................................................................ 3-16
Inner Blinder (RT) ................................................................................................................................... 3-16