ABB RELION RET670, Operator'S Manual

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Mho Impedance supervision logic ZSMGAPC.......................81
Pole slip protection PSPPPAM ..............................................81
Power swing detection ZMRPSB ..........................................81
Power swing logic ZMRPSL...................................................81
Current protection........................................................................82
Breaker failure protection CCRBRF.......................................82
Broken conductor check BRCPTOC......................................82
Capacitor bank protection CBPGAPC....................................82
Directional over-power protection GOPPDOP.......................82
Directional under-power protection GUPPDUP......................82
Instantaneous phase overcurrent protection PHPIOC...........82
Instantaneous residual overcurrent protection EFPIOC.........83
Negative sequence time overcurrent protection for
machines NS2PTOC..............................................................83
Four step directional negative phase sequence
overcurrent protection NS4PTOC..........................................83
Four step phase overcurrent protection OC4PTOC...............83
Pole discordance protection CCRPLD...................................83
Four step residual overcurrent protection EF4PTOC.............83
Sensitive directional residual over current and power
protection SDEPSDE.............................................................84
Thermal overload protection, one time constant LPTTR........84
Thermal overload protection, two time constants
TRPTTR.................................................................................84
Voltage protection........................................................................84
Loss of voltage check LOVPTUV...........................................84
Overexcitation protection OEXPVPH.....................................84
Two step overvoltage protection OV2PTOV..........................85
Two step residual overvoltage protection ROV2PTOV..........85
Two step undervoltage protection UV2PTUV.........................85
Voltage differential protection VDCPTOV..............................85
Frequency protection...................................................................85
Overfrequency protection SAPTOF........................................85
Rate-of-change frequency protection SAPFRC.....................86
Underfrequency protection SAPTUF......................................86
Multipurpose protection...............................................................86
General current and voltage protection CVGAPC..................86
Scheme communication..............................................................86
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH......................................86
Scheme communication logic for residual overcurrent
protection ECPSCH................................................................87
Secondary system supervision....................................................87
Current circuit supervision CCSRDIF.....................................87
Table of contents
8
Operator's manual