ABB RET670 - Page 11

Overview................................................................................60
Breaker failure protection CCRBRF ......................................61
Broken conductor check BRCPTOC .....................................61
Capacitor bank protection CBPGAPC....................................61
Directional over-power protection GOPPDOP ......................61
Directional under-power protection GUPPDUP .....................61
Instantaneous phase overcurrent protection PHPIOC ..........61
Instantaneous residual overcurrent protection EFPIOC ........62
Negativ sequence time overcurrent protection for
machines NS2PTOC..............................................................62
Four step directional negative phase sequence
overcurrent protection NS4PTOC..........................................62
Four step phase overcurrent protection OC4PTOC ..............62
Pole discordance protection CCRPLD...................................62
Four step residual overcurrent protection EF4PTOC ............62
Sensitive directional residual over current and power
protection SDEPSDE ............................................................63
Thermal overload protection, one time constant LPTTR .......63
Thermal overload protection, two time constants
TRPTTR ................................................................................63
Voltage protection........................................................................63
Overview................................................................................63
Loss of voltage check LOVPTUV ..........................................63
Overexcitation protection OEXPVPH ....................................64
Two step overvoltage protection OV2PTOV .........................64
Two step residual overvoltage protection ROV2PTOV .........64
Two step undervoltage protection UV2PTUV ........................64
Voltage differential protection VDCPTOV .............................64
Frequency protection...................................................................64
Overview................................................................................64
Overfrequency protection SAPTOF .......................................65
Rate-of-change frequency protection SAPFRC ....................65
Underfrequency protection SAPTUF .....................................65
Multipurpose protection...............................................................65
Overview................................................................................65
General current and voltage protection CVGAPC..................65
Scheme communication..............................................................66
Overview................................................................................66
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH .....................................66
Scheme communication logic for residual overcurrent
protection ECPSCH ...............................................................66
Secondary system supervision....................................................66
Overview................................................................................66
Table of contents
5
Operator's manual