ABB REL 356

ABB REL 356 Current Differential Protection
Page vi
Receiver Level Signal Detector (RLSD) - Audiotone version only ........................................................... 3-29
Fault Locator and Distance System Common Settings ................................................................................. 3-29
Ohms Per Unit Distance (XPUD)............................................................................................................ 3-29
Distance Unit Type (DTYP) .................................................................................................................... 3-29
Positive Sequence Impedance Angle (PANG) ........................................................................................ 3-29
Zero Sequence Impedance Angle (GANG) ............................................................................................. 3-29
Zero Sequence to Positive Sequence Impedance Ratio (ZR) ................................................................. 3-29
Backup System Settings - Versions with Distance Option only .................................................................... 3-30
Backup System Enable (BKUP) ............................................................................................................. 3-30
Loss of Potential Block (LOPB).............................................................................................................. 3-30
Directional Units Settings ............................................................................................................................. 3-30
Forward Directional Phase Unit (FDOP) ................................................................................................. 3-30
Forward Directional Ground Unit (FDOG) ................................................................................................ 3-30
Ground Directional Unit Polarization (DIRU)............................................................................................ 3-30
Ground Backup Unit Settings - Version with Distance Option only ................................................................ 3-30
Medium Set Ground Overcurrent Unit (IOM) ........................................................................................... 3-30
Ground Overcurrent Timer (TOG) ........................................................................................................... 3-31
Zone 2 and Zone 3 Settings - Versions with Distance Option only ................................................................ 3-31
Zone 2 Phase Reach (Z2P) .................................................................................................................... 3-31
Zone 2 Phase Timer (T2P) ..................................................................................................................... 3-31
Zone 2 Forward Ground Reach (Z2GF) ................................................................................................... 3-31
Zone 2 Reverse Ground Reach (Z2GR) .................................................................................................. 3-32
Zone 2 Ground Timer (T2G) ................................................................................................................... 3-32
Zone 3 Phase Reach (Z3P) .................................................................................................................... 3-32
Zone 3 Phase Timer (T3P) ..................................................................................................................... 3-32
Zone 3 Forward Ground Reach (Z3GF) ................................................................................................... 3-32
Zone 3 Reverse Ground Reach (Z3GR) .................................................................................................. 3-32
Zone 3 Ground Timer (T3G) ................................................................................................................... 3-32
Out of Step Settings - Versions with Distance Option only ........................................................................... 3-32
Out of Step Trip (OST) ........................................................................................................................... 3-32
Out of Step Block (OSB) ........................................................................................................................ 3-33
Outer Blinder (RU) .................................................................................................................................. 3-33
Out of Step Detection Timer (OST1) ...................................................................................................... 3-33
Out of Step Trip Way In Timer (OST2) ................................................................................................... 3-33
Out of Step Trip Way Out Timer (OST3) ................................................................................................ 3-33
Out of Step Trip Override Timer (OSOT) ................................................................................................ 3-34
Remote Setting and Time Settings ............................................................................................................... 3-34
Remote Setting (SETR).......................................................................................................................... 3-34
Time Settings (TIME, YEAR, MONTH, DAY, WKDAY, HOUR, MIN) ..................................................... 3-34
Setting Example - Tapped Load Application ................................................................................................. 3-34
Line and Transformer Data ........................................................................................................................... 3-34
Settings for OTH, C0, C1 and C2 for Tapped Load Applications ................................................................... 3-35
Section 4 Measuring Elements and Operational Logic
Composite Sequence Filter............................................................................................................................. 4-1
Current Differential Algorithm .......................................................................................................................... 4-1
Communication Channel Options .................................................................................................................... 4-3
Data Communication ................................................................................................................................ 4-4
9600 bps Audiotone Interface ................................................................................................................... 4-4
56/64 kbps Digital Communication Interfaces........................................................................................... 4-4
Adaptive Communication Channel Delay Measurement ............................................................................ 4-4
Relay Functions.............................................................................................................................................. 4-5
Direct Transfer Trip .................................................................................................................................. 4-5
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