ABB UniSec Handbuch für Betrieb und Wartung - Seite 7
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D I S T R I B U T I O N S O LU T I O N S
2.1 Maintenance intervals
We recommend carrying out maintenance at the
following intervals:
Activity
Interval (years)
Inspection
5
Maintenance
5
Repair
Based on need
(1) In more complex operating conditions, it is recommended to
appropriately reduce these intervals
2.2 Inspection
• For UniSec Digital units, the same inspection
instructions indicated in paragraph 4.3 of the
UniSec 1VFM200005 manual remain valid.
• For the UniSec Digital monitoring system, it is
necessary to check the correct communication
between the MDC4 -M concentrator and all the
sensors connected to it.
If the value "0" is shown in the LHMI module or in
the mobile APP, it means that the sensor is faulty or
not connected correctly.
In this case it is necessary to check that the wiring is
carried out according to the wiring diagram, if it is
still not possible to display the measurement
correctly, contact ABB.
2.3 Assistance
For UniSec Digital units, the same assistance
instructions indicated in paragraph 4.4 of the UniSec
1VFM200005 manual remain valid.
2.4 Repair and replacement
• Based on statistical information and the
characteristics of the wireless temperature
sensors, it is recommended to replace these
sensors every 15 years.
• For UniSec Digital units, the same repair
instructions indicated in paragraph 4.5 of the
UniSec 1VFM200005 manual remain valid.
• If a component of the monitoring system needs to
be replaced, refer to paragraphs 5.6 and 7.
(1)
(1)
2.5 Measurements transmitted to
the LHMI module
The LHMI module allows the parameters measured
by the sensors installed in the unit to be monitored.
Use the "Up" and "Down" arrows to change screens.
The viewable screens are illustrated and described
below.
Health diagnosis screen
This screen shows the general condition of the
system by indicating its "health status, which can
be:
• Good: f all the parameters are within the specified
limits
• Bad: If at least one parameter is not within the
specified limits
The parameter beyond the specified limits appears
in the "Diagnosis" line:
• Good: If all the parameters are within the
specified limits
• Temp abnormal: In the case of temperature
imbalance between the phases
• Gas abnormal: If the pressure exceeds the limits
• Temp & Gas abnormal: If the temperature and gas
exceed the limits
"Maxim Temp" indicates the maximum temperature
value measured by the wireless temperature sensor
in the main circuit.
• Real time Temp: This screen displays the absolute
temperature measurements in the "Busbar, CB
and Cable" points of the main circuit for each of
the three phases L1, L2 and L3.
WARNING
There is one LHMI module configuration
for all the units. Consequently, value "0"
may appear in some units when a temperature
sensor has not been installed
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