ABB RELION REL670, Operator'S Manual

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Broken conductor check BRCPTOC (46).....................................56
Directional over-power protection GOPPDOP (32)......................57
Directional under-power protection GUPPDUP (37)....................57
Instantaneous phase overcurrent protection PHPIOC (50)..........57
Instantaneous residual overcurrent protection EFPIOC
(50N).............................................................................................57
Four step phase overcurrent protection OC4PTOC (51_67)........57
Pole discrepancy protection CCRPLD (52PD).............................58
Four step residual overcurrent protection EF4PTOC
(51N67N)......................................................................................58
Sensitive directional residual over current and power
protection SDEPSDE (67N)..........................................................58
Stub protection STBPTOC (50STB).............................................58
Thermal overload protection, one time constant LPTTR
(26)...............................................................................................58
Voltage protection..............................................................................59
Overview.......................................................................................59
Loss of voltage check LOVPTUV (27)..........................................59
Overexcitation protection OEXPVPH (24)....................................59
Two step overvoltage protection OV2PTOV (59).........................59
Two step residual overvoltage protection ROV2PTOV
(59N).............................................................................................59
Two step undervoltage protection UV2PTUV (27).......................60
Voltage differential protection VDCPTOV (60).............................60
Frequency protection.........................................................................60
Overview.......................................................................................60
Overfrequency protection SAPTOF (81)......................................60
Rate-of-change frequency protection SAPFRC (81)....................60
Underfrequency protection SAPTUF (81).....................................61
Multipurpose protection.....................................................................61
Overview.......................................................................................61
General current and voltage protection CVGAPC........................61
Scheme communication....................................................................61
Overview.......................................................................................61
Scheme communication logic for distance or overcurrent
protection ZCPSCH (85)...............................................................61
Phase segregated scheme communication logic for
distance protection ZC1PPSCH (85)............................................62
Current reversal and weak-end infeed logic for distance
protection ZCRWPSCH (85).........................................................62
Table of contents
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Operator's manual