ABB UniSec User manual
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DISTRIBUTION SOLUTIONS
UniSec Digital
Operation and maintenance manual
Index
2UNISEC DIGITAL MANUALE DI FUNZIONAMENTO E MANUTENZIONE
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Safety
Warnings provided in the interest of
safety
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Qualified personnel
Information of crucial importance
• DANGER - highlights the more serious and
immediate risks able to cause severe personal
injuries and death
• WARNING - indicates risks or unsafe actions
which could cause severe personal injuries or
death.
• CAUTION - indicates risks or unsafe actions
which could cause less severe personal injuries or
material damage
• NOTE - highlights important procedures or
requirements which, in the case of non
compliance, could result in material damage
WARNING
Make sure that the specified electrical data are not
exceeded in the conditions is which the apparatus
is used. Keep the manuals in an accessible place
where they can be consulted by all the personnel
involved in the apparatus installation, use and
maintenance operations. The utility provider’s
personnel are responsible for all issues concerning
occupational safety and correct use of the
apparatus
WARNING
Always comply with the instructions in the manual
and the regulations governing good engineering
practice (GEP)! Dangerous voltages can cause
severe injuries or death. Disconnect the supply
source, then earth all live parts before performing
any work on the apparatus.
Comply with the safety regulations in force in the
place of installation
NOTE
This manual is an addition to the operation
and maintenance manual for UniSec panels
1VFM200005
Contacts
DISTRIBUTION SOLUTIONS 3
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Introduction
General aspects
Operation and maintenance manual
Regulations and specifications
CEI EN/IEC
standards
Title
IEC EN 62271-200
IEC EN 62271-1
IEC EN 62271-202
IEC EN 61869-2
IEC EN 61869-3
IEC EN 62271-100
IEC EN 62271-102
IEC EN 62271-105
IEC EN 62271-103
CEI EN 60529
CEI EN 62271-206
CEI EN 60071-2
CEI EN 62271-106
IEC TS 62271-
210:2013
IEC TS 62271-
304:2008
4UNISEC DIGITAL MANUALE DI FUNZIONAMENTO E MANUTENZIONE
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Introduction
Operating conditions
Normal operating conditions
Ambient temperature ° C
Altitude above sea level m
Humidity conditions %
Pollution
Special operating conditions
DANGER
Condensation could form if the switchgear is in
service where the humidity level is high and/or
there are considerable temperature variations.
However, the formation of condensation must be
an exception to the rule in the normal operating
conditions of indoor switchgear. Adequate
preventive measures must be taken along with the
manufacturer (e.g. installation of electric heaters)
to prevent condensation from forming and,
consequently, corrosion or other adverse effects.
The operating system of the heaters depends on
the relative design, while the specifications must
be taken from the order documents
DISTRIBUTION SOLUTIONS 5
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1. Technical data
1.1 Electrical Specifications
Rated current Ir
Feeder
SF Bar
Quantity of SF
NOTE
Consult the manuals of the respective
apparatuses for the specifications of any
additional equipment, e.g. relays and circuit-
breakers
1.2 Internal arc withstand
classification
Current Accessible sides Arcing time
NOTE
UniSec switchgear must be installed
indoors, in conditions suitable for
electrical equipment.
This means that access must be restricted to
authorized personnel only
6UNISEC DIGITAL MANUALE DI FUNZIONAMENTO E MANUTENZIONE
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2. General information about UniSec Digital
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NOTE
The sensors in the monitoring system do
not need to be calibrated
SF
DISTRIBUTION SOLUTIONS 7
2.1 Maintenance intervals
Activity Interval (years)
2.2 Inspection
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2.3 Assistance
2.4 Repair and replacement
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2.5 Measurements transmitted to
the LHMI module
Health diagnosis screen
• Good
• Bad
• Good
• Temp abnormal
• Gas abnormal
• Temp & Gas abnormal
• Real time Temp
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
8UNISEC DIGITAL MANUALE DI FUNZIONAMENTO E MANUTENZIONE
• Ambient parameters
• Gas tank pressure screen
• System setting screen
NOTE
Consult manual 2NGA000492 for further
details about use of the LHMI module
2NGA000492
2.6 Alarms and corrective
NOTE
The threshold values are defined on the
basis of the characteristics of the
components installed and the tests performed to
ensure the apparatus functions correctly.
The threshold values set by the manufacturer cannot
be changed.
DISTRIBUTION SOLUTIONS 9
NOTE
Consult user manual 2NGA000492 of
concentrator MDC4-M for further details
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NOTE
Consult the UniSec operation and
maintenance manual for further details
about maintenance operations
WARNING
If one or more of the temperature values in
the “Real time Temp” screen exceeds 100°C,
maintenance must be planned to find out the reason
for the high temperature value and restore the circuit
to its normal operating conditions
WARNING
The switchgear has been designed for use in
normal operating conditions at up to 95%
relative humidity for 24 hours and up to 90% for one
month. Should the humidity value in the “ambient
parameters” screen exceed these values, the useful
life of the switchgear could become rapidly reduced
10 UNISEC DIGITAL MANUALE DI FUNZIONAMENTO E MANUTENZIONE
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3. Replacement of wireless sensors
and concentrator
Package content
CAUTION
both the concentrator and all the sensors
in the panel must be replaced using the
new components provided in the kit.
The sensors in the kit are already synchronized
with the concentrator
WARNING
If the sensors on the busbars must be
replaced, make sure that the busbar
compartment is de-energized before proceeding with
any operation
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NOTE
the contact tab must be positioned directly
on the sheath or copper busbar. Make sure
that the tab is not on a level with screws or holes
WARNING
The following operations require access to
the cable compartment. Before accessing
the compartment, make sure that the circuit-breaker
and disconnector (if present) are in the open position.
Check that the cables are de-energized and that the
earthing switch is open. Make sure that the cables are
not supplied in any way.
If maintenance operations are required in the low
voltage compartment, first make sure that the
compactment is de-energized
NOTE
• Consult operation and maintenance manual
1VFM200005 for details about tightening torque
and other values
• The maintenance work must be performed using
the tools described in sect. 4.1 of operation and
maintenance manual 1VFM200005
• Consult the circuit diagram supplied with the
switchgear for details about electrical
applications
• After installing electrical applications, make sure
that the wires and cabling do not touch moving
components
DISTRIBUTION SOLUTIONS 11
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Example of assembly on the cable connection
Example of assembly on cable connecting to CT
WARNING
Make sure that the low voltage
compartment is de-energized before
replacing the concentrator
12 UNISEC DIGITAL MANUALE DI FUNZIONAMENTO E MANUTENZIONE
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3. Replacement of wireless sensors
and concentrator
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DISTRIBUTION SOLUTIONS 13
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4. Ambient sensor replacement
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14 UNISEC DIGITAL MANUALE DI FUNZIONAMENTO E MANUTENZIONE
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5. LHMI module replacement
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DISTRIBUTION SOLUTIONS 15
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1VCP000945 - Rev. A, en – Unisec Digital Operation and maintenance manual – 2021.09 (UniSec) (mt)
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For more information please contact:
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More product information:
abb.com/mediumvoltage
Your contact center:
abb.com/contactcenters
More service information:
abb.com/service
© Copyright 2021 ABB. All rights reserved.
The data and illustrations are not binding. We reserve the right to make changes in
the course of technical development of the product.
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