ABB Relion 670 Series Technical Reference Manual page 473

1MRK 505 208-UEN B
Y
Value Reported
(1st)
(*)Set value for t: XDbRepInt
IEC05000500 V1 EN
Figure 241: Periodic reporting
Technical reference manual
• Cyclic reporting (Cyclic)
• Amplitude dead-band supervision (Dead band)
• Integral dead-band supervision (Int deadband)
Cyclic reporting
The cyclic reporting of measured value is performed according to chosen setting
(XRepTyp). The measuring channel reports the value independent of amplitude or
integral dead-band reporting.
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 (XZeroDb),
then the measuring channel reports the new value to a higher level, if this is
detected by a new measured value. This limits the information flow to a minimum
necessary. Figure 242
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
t (*) t (*)
shows an example with the amplitude dead-band
Section 13
Monitoring
Value Reported
Value Reported
Y4
Y5
t (*)
t
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