ABB REC670 Operator's Manual page 10

Table of contents
4
Overview......................................................................................53
Differential protection...................................................................53
Overview................................................................................53
High impedance differential protection HZPDIF ....................53
Current protection........................................................................54
Overview................................................................................54
Breaker failure protection CCRBRF ......................................54
Broken conductor check BRCPTOC .....................................54
Directional over-power protection GOPPDOP ......................54
Directional under-power protection GUPPDUP .....................54
Instantaneous phase overcurrent protection PHPIOC ..........54
Instantaneous residual overcurrent protection EFPIOC ........55
Four step phase overcurrent protection OC4PTOC ..............55
Pole discordance protection CCRPLD...................................55
Four step residual overcurrent protection EF4PTOC ............55
Sensitive directional residual over current and power
protection SDEPSDE ............................................................55
Stub protection STBPTOC ....................................................56
Thermal overload protection, one time constant LPTTR .......56
Thermal overload protection, two time constants
TRPTTR ................................................................................56
Voltage protection........................................................................56
Overview................................................................................56
Loss of voltage check LOVPTUV ..........................................56
Two step overvoltage protection OV2PTOV .........................56
Two step residual overvoltage protection ROV2PTOV .........57
Two step undervoltage protection UV2PTUV ........................57
Voltage differential protection VDCPTOV .............................57
Frequency protection...................................................................57
Overview................................................................................57
Overfrequency protection SAPTOF .......................................57
Rate-of-change frequency protection SAPFRC ....................57
Underfrequency protection SAPTUF .....................................58
Multipurpose protection...............................................................58
Overview................................................................................58
General current and voltage protection CVGAPC..................58
Scheme communication..............................................................58
Overview................................................................................58
Scheme communication logic for distance or
overcurrent protection ZCPSCH ............................................58
Current reversal and weak-end infeed logic for distance
protection ZCRWPSCH .........................................................59
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH .....................................59
Operator's manual