ABB Relion 650 Series Technical Manual page 379

1MRK 511 424-UEN B
Bay control REC650 2.2 IEC
Technical manual
Phase angle reference
All phase angles are presented in relation to a defined reference channel. The
General setting parameter PhaseAngleRef defines the reference, see section
"Analog inputs".
Zero point clamping
Measured value below zero point clamping limit is forced to zero. This allows the
noise in the input signal to be ignored. The zero point clamping limit is a general
setting (XZeroDb where X equals S, P, Q, PF, U, I, F, IL1-3, UL1-3, UL12-31, I1,
I2, 3I0, U1, U2 or 3U0). Observe that this measurement supervision zero point
clamping might be overridden by the zero point clamping used for the
measurement values within CVMMXN.
Continuous monitoring of the measured quantity
Users can continuously monitor the measured quantity available in the function
block by means of four defined operating thresholds, see figure 177. The
monitoring has two different modes of operating:
• Overfunction, when the measured quantity exceeds the High limit (XHiLim) or
High-high limit (XHiHiLim) pre-set values
• Underfunction, when the measured quantity decreases under the Low limit
(XLowLim) or Low-low limit (XLowLowLim) pre-set values.
X_RANGE is illustrated in figure 177.
Y
High-high limit
High limit
X_RANGE=0
Low limit
X_RANGE=2
Low-low limit
X_RANGE=4
IEC05000657 V3 EN-US
Figure 177: Presentation of operating limits
Each analogue output has one corresponding supervision level output
(X_RANGE). The output signal is an integer in the interval 0-4 (0: Normal, 1:
High limit exceeded, 3: High-high limit exceeded, 2: below Low limit and 4: below
Low-low limit).
Y = Magnitude of the Measured Quantity
X_RANGE = 3
X_RANGE= 1
Hysteresis
X_RANGE=0
Section 10
Monitoring
SEMOD54417-303 v5
SEMOD54417-137 v4
SEMOD54417-140 v5
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IEC05000657-3-en.vsdx
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