ABB REL650 Technical Manual page 124

Section 6
Impedance protection
Y
Value Reported
(1st)
(*)Set value for t: XDbRepInt
IEC05000500 V2 EN-US
Figure 50: Periodic reporting
118
In addition to the normal cyclic reporting the IED also report spontaneously when
measured value passes any of the defined threshold limits.
Value Reported
Y2
Y1
t (*)
Amplitude dead-band supervision
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
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.
Value Reported
Y3
Y4
t (*) t (*)
1MRK 506 382-UEN A
Value Reported
Value Reported
Y5
t (*)
IEC05000500-2-en.vsdx
51 shows an example with the
Line distance protection REL650 2.2 IEC
Technical manual
t
SEMOD54417-163 v6