ABB ret650 - Page 8

Back-up protection functions
IEC 61850 or
Function
name
ANSI Function description Transformer
RET650
RET650 (A01) 2W/1CB RET650 (A05) 3W/1CB RET650 (A07) OLTC
Current protection
PHPIOC 50 Instantaneous phase overcurrent protection, 3–phase output 0–3 2 3
OC4PTOC 51/67 Four step phase overcurrent protection, 3-phase output 0–3 2 3 2
EFPIOC 50N Instantaneous residual overcurrent protection 0–3 2 3
EF4PTOC 51N/67N Four step residual overcurrent protection, zero/negative sequence
direction
0–3 2 3 2
TRPTTR 49 Thermal overload protection, two time constants 0–3 2 3 2
CCRBRF 50BF Breaker failure protection, 3–phase activation and output 0–3 2 3
CCRPLD 52PD Pole discordance protection 0–3 2 3
GUPPDUP 37 Directional underpower protection 0–2 1 1 2
GOPPDOP 32 Directional overpower protection 0–2 1 1 2
DNSPTOC 46 Negative sequence based overcurrent function 0–2 1 2
Voltage protection
UV2PTUV 27 Two step undervoltage protection 0–2 1 1 2
OV2PTOV 59 Two step overvoltage protection 0–2 1 1 2
ROV2PTOV 59N Two step residual overvoltage protection 0–2 1 1 2
OEXPVPH 24 Overexcitation protection 0–1 1 1
Frequency protection
SAPTUF 81 Underfrequency function 0–4 4 4 4
SAPTOF 81 Overfrequency function 0–4 4 4 4
SAPFRC 81 Rate-of-change frequency protection 0–4 2 2 4
Transformer protection RET650
1MRK 504 137-BEN B
Product version: 1.3
8 ABB