ABB RED650, Technical Manual

Page: 146 / 926

7.1.7.10 Measurement
Measurement supervision
SEMOD54417-130 v4
The protection, control, and monitoring IEDs have functionality to measure and
further process information for currents and voltages obtained from the pre-
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
GUID-8568A19F-0100-4A1A-B3C3-444FD7D6F00B v1
X equals Z in the name of the below mentioned settings.
Zero point clamping
GUID-4894EF16-3376-48EB-863F-9CE14487ACAB v1
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 setting
(
XZeroDb where X equals Z).
Continuous monitoring of the measured quantity
SEMOD54417-140 v5
Users can continuously monitor the measured quantity available in the function
block by means of four defined operating thresholds, see figure
61 . 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 61 .
Section 7
1MRK 505 394-UEN A
Impedance protection
140 Line differential protection RED650 2.2 IEC
Technical manual