IEC 61850/
Function
block
name
ANSI
Function description
Transformer
RET650 (A01)
2W/1CB
RET650 (A05)
3W/1CB
RET650 (A07)
OLTC
SAPTUF
81
Underfrequency function
4
4
4
SAPTOF
81
Overfrequency function
4
4
4
SAPFRC
81
Rate-of-change frequency protection
2
2
4
Transformer protection RET650
1MRK 504 127-BEN -
Product version: 1.1
Issued: February 2011
10
ABB