Back-up protection functions
IEC 61850/
Function
block
name
ANSI
Function description
Breaker
REQ650 (A01A)
3Ph/1CB/1BB
REQ650 (A11A)
1Ph/1CB/1BB
REQ650 (B11A)
1Ph/1CB/2BB
Current protection
PHPIOC
50
Instantaneous phase overcurrent protection
1
SPTPIOC
50
Instantaneous phase overcurrent protection
1
1
OC4PTOC
51/67
Four step directional phase overcurrent
protection
1
OC4SPTOC
51/67
Four step phase overcurrent protection
1
1
EFPIOC
50N
Instantaneous residual overcurrent
protection
1
1
1
EF4PTOC
51N/
67N
Four step directional residual overcurrent
protection
1
1
1
SDEPSDE
67N
Sensitive directional residual overcurrent
and power protection
1
1
1
LPTTR
26
Thermal overload protection, one time
constant
1
1
1
CCRBRF
50BF
Breaker failure protection
1
CSPRBRF
50BF
Breaker failure protection
1
1
STBPTOC
50STB
Stub protection
1
1
1
CCRPLD
52PD
Pole discordance protection
1
1
1
BRCPTOC
46
Broken conductor check
1
1
1
GUPPDUP
37
Directional underpower protection
1
1
1
GOPPDOP
32
Directional overpower protection
1
1
1
DNSPTOC
46
Negative sequence based overcurrent
function
1
1
1
Breaker protection REQ650 ANSI
1MRK 505 269-BUS -
Product version: 1.1
Issued: April 2011
8
ABB