ABB REG650 Technical Manual page 376

Section 13
Monitoring
370
processing blocks. The number of processed alternate measuring quantities
depends on the type of IED and built-in options.
The information on measured quantities is available for the user at different locations:
• Locally by means of the local HMI
• Remotely using the monitoring tool within PCM600 or over the station bus
• Internally by connecting the analogue 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 PhaseAngleRef defines the reference. The
PhaseAngleRef is set in local HMI under: 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 (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 each function
block by means of four defined operating thresholds, see figure 189. The
monitoring has two different modes of operating:
• Overfunction, when the measured current exceeds the High limit (XHiLim) or
High-high limit (XHiHiLim) pre-set values
• Underfunction, when the measured current decreases under the Low limit
(XLowLim) or Low-low limit (XLowLowLim) pre-set values.
X_RANGE is illustrated in figure 189.
1MRK 502 034-UEN -
Technical Manual