QUICK START GUIDE RELION® 620 SERIES 3
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Most common function blocks
Function ANSI
Protection
Three-phase non-directional overcurrent protection, low stage PHLPTOC 3I> 51P-1
Three-phase non-directional overcurrent protection, high stage PHHPTOC 3I>> 51P-2
Three-phase non-directional overcurrent protection, instantaneous stage PHIPTOC 3I>>> 50 P/51P
Three-phase directional overcurrent protection, low stage DPHLPDOC 3I> → 67-1
Three-phase directional overcurrent protection, high stage DPHHPDOC 3I>> → 67-2
Non-directional earth fault protection, low stage EFLPTOC Io> 51N-1
Non-directional earth fault protection, high stage EFHPTOC Io>> 51N-2
Non-directional earth fault protection, instantaneous stage EFIPTOC Io>>> 50N/51N
Directional earth fault protection, low stage DEFLPDEF Io> → 67N-1
Directional earth fault porotection, hig stage DEFHPDEF Io>> → 67N-2
Admittance based earth-fault protection EFPADM Yo> → 21YN
Wattmetric based earth-fault protection WPWDE Po> → 32N
Transient / intermittent earth-fault protection INTRPTEF Io> → IEF 67NIEFH
Harmonics based earth-fault protection HAEFPTOC Io>HA 51NHA
Negative-sequence overcurrent protection NSPTOC I2> 46
Phase discontinuity protection PDNSPTOC I2/I1> 46PD
Residual overvoltage protection ROVPTOV Uo> 59G
Three-phase undervoltage protection PHPTUV 3U< 27
Three-phase overvoltage protection PHPTOV 3U> 59
Positive-sequence undervoltage protection PSPTUV U1< 47U+
Negative-sequence overvoltage protection NSPTOV U2> 47O-
Frequence protection FRPFRQ f>/f<,df/dt 81
Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR 3lth>F 49F
Loss of phase (undercurrent) PHPTUC 3l< 37F
Circuit breaker failure protection CCBRBRF 3 I >/I o>B F 51BF/51NBF
Three-phase inrush detector INRPHAR 3l2f> 68
Master trip TRPPTRC Master Trip 94/86
Arc protection ARCSARC ARC 50L/50NL
High impedance fault detection PHIZ PHIZ PHIZ
Load shedding and restoration LSHDPFRQ UFLS/R 81LSH
Multipurpose analog protection MAPGAPC MAP MAP
Loss of load supervision LOFLPTUC 3l< 37M
Motor load jam protection JAMPTOC Ist> 51LR
Motor start-up supervision STTPMSU Is2t n< 49,66,48,51LR
Phase reversal protection PREVPTOC I2>> 46R
Thermal overload protection for motors MPTTR 3lth>M 49M
Motor differential protection MPDIF 3dl>M 87M
Voltage per hertz protection OEPVPH U/f> 24
Three-phase thermal overload protection for power transformers, two time constants T2PTTR 3lth>T 49T
Stabilized and instantaneous differential protection for 2-winding transformers TR2PTDF 3 d l>T 87T
Numerical stabilized low impedance resticted earth-fault protection LREFPNDF dIoHi> 87NL
High impedance based restricted earth-fault protection HREFPDIF dIoHi> 87NH
The most common function blocks are listed below, please refer to the 620 series Technical Manual for the full list.
The available function blocks varies depending on the selected IED and configuration used.
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