ABB RED650 Technical Manual page 526

Section 15
Monitoring
520
The logical value of the functional output signals changes according to figure 258.
The user can set the hysteresis (XLimHyst), which determines the difference
between the operating and reset value at each operating point, in wide range for
each measuring channel separately. The hysteresis is common for all operating
values within one channel.
Actual value of the measured quantity
The actual value of the measured quantity is available locally and remotely. The
measurement is continuous for each measured quantity separately, but the reporting
of the value to the higher levels depends on the selected reporting mode. The
following basic reporting modes are available:
• Cyclic reporting (Cyclic)
• Amplitude dead-band supervision (Dead band)
• Integral dead-band supervision (Int deadband)
• Amplitude Deadband and 5s cyclic
• Amplitude Deadband and 30s cyclic
• Amplitude Deadband and 1min cyclic
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.
1MRK 505 394-UEN A
Line differential protection RED650 2.2 IEC
Technical manual
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