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
To Next Page
Loading...
