Network Analyzer - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

Network Analyzer

138 | © 2013 ABB | 1SDH001000R0002 - L7804
Path
Main page - Menus - Measurements - Network Analyzer (for the measurements and the
counters)
Main page - Menus - Settings - Network Analyzer (for the control parameters)
Description
The Network Analyzer function allows you to set controls on long cycle voltage and current in
order to analyze the operation of the your system.
For this purpose, voltages and currents are monitored, so as to find:
• Average voltage.
• Short term voltage drops or interruptions.
• Short duration voltage increases.
• Slow voltage drops.
• Slow voltage increases.
• Imbalances between the voltages.
• Harmonic distortion of voltages and currents.
Each monitoring is associated with control parameters set by the user and counters that are
incremented each time there are control conditions set.
NOTE:
• On the display the cumulative counter and the counters refer to the last 24 hours
of activity (2 counters for each monitoring) are available.
• With external communication the cumulative counter and the counters refer to the
last 7 days of activity (8 counters for each monitoring) are available.
Average voltage
The average voltage is calculated considering the positive sequence of three-phase voltage
system.
There are two alarm counters:
• Over voltages counts the times in which the medium voltage rises above a threshold.
• Under voltages counts the times in which the average voltage falls below a threshold.
Parameters that can be set for the check are:
Parameter Description
Defines the upper alarm threshold.
High Threshold
It is expressed as % Un.
Defines the lower alarm threshold.
Low Threshold
It is expressed as % Un.
Monitor time
Defines the time interval between successive measurements.
NOTE: the monitor time is the same parameter available for the measurements of
currents and maximum voltages.
The checking is completed by these measurements:
• Cumulative positive sequence.
• Cumulative negative sequence.
• Positive sequence of the last period.
• Negative sequence of the last period.
NOTE: The measurements of the sequences are available following the path: Main
page - Menus - Measurements - Network Analyzer- Sequences Voltages.
Continued on the next page
Ekip Touch protection release | 16 - Hi-Touch measurements
ABB | SACE Emax 2