ABB Relion 650 Series Technical Manual page 428

Section 13
Monitoring
• Locally by means of the local HMI
• Remotely using the monitoring tool within PCM600 or over the station bus
• Internally by connecting the analog output signals to the Disturbance Report function
Phase angle reference
All phase angles are presented in relation to a defined reference channel. The General setting
parameter
Configuration/Analog modules/Reference channel service values.
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 (
P, Q, PF, V, I, F, IA, IB, IC, VA, VB, VC, VAB, VBC, VCA, I1, I2, 3I0, V1, V2 or 3V0). 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 each function block by means
of four defined operating thresholds, see figure 229. The monitoring has two different modes of
operating:
• Overfunction, when the measured current exceeds the High limit (
XHiHiLim ) pre-set values
(
• Underfunction, when the measured current decreases under the Low limit (
low limit (
X_RANGE is illustrated in figure 229.
Y
High-high limit
High limit
Low limit
Low-low limit
IEC05000657 V1 EN-US
Figure 229: Presentation of operating limits
Each analog 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). The output may be connected to a measurement
expander block (XP (RANGE_XP)) to get measurement supervision as binary signals.
The logical value of the functional output signals changes according to figure 229.
422
PhaseAngleRef defines the reference. The PhaseAngleRef is set in local HMI under:
XLowLowLim ) pre-set values.
X_RANGE = 3
X_RANGE= 1
X_RANGE=0
X_RANGE=0
X_RANGE=2
X_RANGE=4
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XZeroDb where X equals S,
XHiLim ) or High-high limit
Hysteresis
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Line distance protection REL650
1MRK 506 326-UUS B
SEMOD54417-303 v4
SEMOD54417-137 v3
SEMOD54417-140 v3
XLowLim ) or Low-
t
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