IEC 61850/
Function
block
name
ANSI
Function description
Breaker
REQ650 (A01A)
3Ph/1CB/1BB
REQ650 (A11A)
1Ph/1CB/1BB
REQ650 (B11A)
1Ph/1CB/2BB
Voltage protection
UV2PTUV
27
Two step undervoltage protection
1
1
1
OV2PTOV
59
Two step overvoltage protection
1
1
1
ROV2PTOV 59N
Two step residual overvoltage protection
1
1
1
LOVPTUV
27
Loss of voltage check
1
1
1
Frequency protection
SAPTUF
81
Underfrequency function
2
2
2
SAPTOF
81
Overfrequency function
2
2
2
SAPFRC
81
Rate-of-change frequency protection
2
2
2
Breaker protection REQ650 ANSI
1MRK 505 269-BUS -
Product version: 1.1
Issued: April 2011
ABB
9