ABB ret650 - Back-Up Protection Functions

IEC 61850 or
function name
ANSI Function description Transformer
RET650 (A01) RET650 (A05)
Differential protection
T2WPDIF 87T Transformer differential protection, two winding 1
T3WPDIF 87T Transformer differential protection, three winding 1
REFPDIF 87N Restricted earth fault protection, low impedance 1 2
2.3 Back-up protection functions
GUID-A8D0852F-807F-4442-8730-E44808E194F0 v13
IEC 61850 or
function name
ANSI Function description Transformer
RET650 (A01) RET650 (A05)
Current protection
PHPIOC 50 Instantaneous phase overcurrent protection 2 3
OC4PTOC
51_67
1)
Directional phase overcurrent protection, four steps 2 3
EFPIOC 50N Instantaneous residual overcurrent protection 2 3
EF4PTOC 51N
67N
2)
Directional residual overcurrent protection, four steps 2 3
TRPTTR 49 Thermal overload protection, two time constants 1 1
CCRBRF 50BF Breaker failure protection 2 3
CCPDSC 52PD Pole discordance protection 2 3
Voltage protection
UV2PTUV 27 Two step undervoltage protection 1 1
OV2PTOV 59 Two step overvoltage protection 1 1
ROV2PTOV 59N Two step residual overvoltage protection 1 1
OEXPVPH 24 Overexcitation protection 1 1
Frequency protection
SAPTUF 81 Underfrequency protection 1 1
SAPTOF 81 Overfrequency protection 1 1
SAPFRC 81 Rate-of-change of frequency protection 1 1
1) 67 requires voltage
2) 67N requires voltage
1MRK 504 169-UEN A Section 2
Application
Transformer protection RET650 2.2 IEC 25
Application manual