ABB RED650, Technical Manual

Page: 148 / 926

In addition to the normal cyclic reporting the IED also report spontaneously when
measured value passes any of the defined threshold limits.
IEC05000500-2-en.vsdx
V
a
lu
e
1
Y
t
V
a
lu
e
2
V
a
lu
e
3
V
a
lu
e
4
Value Reported
(1st)
Value Reported
V
a
lu
e
5
Value Reported
Y1
Y2
Y5
Value Reported
Value Reported
Y3
Y4
(*)Set value for t: XDbRepInt
t (*) t (*) t (*) t (*)
IEC05000500 V2 EN-US
Figure 62: Periodic reporting
Amplitude dead-band supervision
SEMOD54417-163 v6
If a measuring value is changed, compared to the last reported value, and the
change is larger than the ±ΔY pre-defined limits that are set by user (
XDbRepInt ),
then the measuring channel reports the new value to a higher level. This limits the
information flow to a minimum necessary. Figure
63 shows an example with the
amplitude dead-band supervision. The picture is simplified: the process is not
continuous but the values are evaluated with a time interval of one execution cycle
from each other.
Section 7
1MRK 505 394-UEN A
Impedance protection
142 Line differential protection RED650 2.2 IEC
Technical manual