Lightning and overvoltage protection Water Treatment Plants by onetwo3

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									Lightning and overvoltage protection
             Water Treatment Plants
EXPERTISE OVERALL PROTECTION
                                                                                                     How to protect
                                                                                            water treatment plants?
Renowned expertise in lightning protection
                                             ABB Lightning Protection Group has                                       Water is a fundamental utility. Its increased
                                             several decades of experience and uses                                   consumption is the reflection of population
                                             its technological expertise to provide                                   growth and an improved standard of living.
                                             protection against lightning and                                         Water and wastewater treatment plants are
                                             overvoltage.                                                             particularly exposed to lightning risks, due
                                             In addition to up-to-date expertise with its                             to vast surface areas and exposure of
                                                                                                                      frequently isolated sites. Lightning strikes
                                             global lightning protection offer (external
                                                                                                                      are a major component in the risk to be
                                             and internal), ABB Lightning Protection
                                                                                                                      assumed, both because of the direct effect
                                             Group now offers a wide range of
                                                                                                                      of lightning on the structure (External
                                             lightning conductors and surge arresters
                                                                                                                      Lightning Protection Installation), and the
                                             dedicated to the water cycle: collection,                                overvoltages on the facility (Internal
                                             treatment, storage, transport and                                        Lightning Protection Installation).
                                             distribution...
                                                                                                                      The consequences of lightning on
                                             ABB Lightning Protection Group also has                                  treatment plants have repercussions on all
                                             a laboratory comprising various                                          equipment and overvoltage will directly
                                             generators capable of testing all                                        affect instrumentation and remote
                                             equipment under real conditions with                                     management devices as well as PLCs…
                                             different amplitudes of surge currents, in
                                             order to optimize protection solutions.                                  The protection of water cycle facilities
                                                                                                                      against overvoltage involves all types of
                                                                                                                      structures, i.e. pumping stations,
                                                                                                                      treatment plants, storage, transport and
                                                                                                                      distribution.




                                             LESPS laboratory in Bagnères-de-Bigorre (65)




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                                                        - Flowmeters
                                                        - Level
                                                        measuring
                                                        devices
                                                        - Temperature
                                                        measuring
                                                        devices         - Probes
                                                        - Pressure      - Flowmeters
                                                        measuring       - Meters
                                                        devices
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                                                                                                        - Recorders
                                - Flowmeters                                                            - Sensors
                                - Probes                                                                - Flowmeters
                                - Level measuring                                                       - Level measuring
                                devices                                                                 devices
                                - Temperature                                                           - Temperature
                                measuring devices                                                       measuring devices
                                - Pressure
                                measuring devices
INDIRECT STRIKES
        and pumping stations
Protection of treatment plants
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                                                         Telecom
                                                                                                              4
                                                         operator
                                                                                                                    Automaton                                             - Flowmeter (with
                                                                                                                                                 5
                                                                                                              2                                                           integrated sensors)

                                                                                                                                3                                         - Chlorine analyzer
                                                          Energy
                                                        distributor                               Main                                                                    - Sensors
                                                                                      1
                                                                                                 switch
                                                                                                 board
                                                                                                                        Flowmeter

                                                                                                                              3                                    2

                                                To lightning arrester
                                                  interconnection
                                                    inspection pit                                                                                                            - Reservoirs
                                                                                                                                                                              - Filtration tank
                                                                                                                                                                              - Settling tank
                                                                                                                                                                              - Distribution
ABB Lightning Protection            1     Protection of the power supply line input
Group offers a
comprehensive range                          Name             Iimp (10/350)   Imax (8/20)      Reference           Function / Comment
of surge arresters adapted             OVR T1 3N 25 255-7        25kA              -        2CTB815101R8800                  Type 1
to the protection of water and
wastewater treatment plants.       2     Protection of the pump feed line
ABB recommends the
                                             Name             Iimp (10/350)   Imax (8/20)      Reference           Function / Comment
installation of Type 1 lightning
arresters upstream of the          OVR T2 1N 40 275 s P TS          -          40 kA        2CTB803952R0200                   Type 2

facilities. In addition, Type 2
                                    3     Transmission line protection
fine protections must be
positioned as near to the                    Name             Iimp (10/350)   Imax (8/20)     Reference            Function / Comment
equipment needing
                                          OVR TC 6V P               -          10 kA        2CTB804820R0000         RS422/RS485 - Profibus DP
protection as possible.
Transmission lines, telephone      3     Transmission line protection
lines, computer connection
                                             Name             Iimp (10/350)   Imax (8/20)      Reference           Function / Comment
or current loop must also
be protected against                      OVR TC 24V P              -          10 kA        2CTB804820R0200     LS - 4/20mA - 4/20Ma HART - Profibus PA

overvoltages. In this case,
                                    4     STN link protection
ABB Lightning Protection
Group recommends                             Name             Iimp (10/350)   Imax (8/20)      Reference           Function / Comment
pluggable OVR TC P surge
                                         OVR TC 200FR P             -          10 kA        2CTB804820R0500                      STN*
arresters.
                                   5     Protection of the coaxial links
                                             Name             Iimp (10/350)   Imax (8/20)      Reference           Function / Comment

                                        PHF AN 50 BNC m/f           -          20 kA           8150 02 12               Antenna protection


                                   OVR TC P surge arresters                            Name                 Reference
                                                                                OVR TC 6V C           2CTB804821R0000
* Switch Telecom Network :         are equipped with pluggable
                                                                                OVR TC 24V C          2CTB804821R0200
analog telecom line                cartridges to facilitate
                                                                                OVR TC 200FR C        2CTB804821R0500
                                   maintenance operations.
INDIRECT STRIKES          Protection
of transport - distribution systems
                                       Flowmeter with separated sensor
                                       It is necessary to protect                  ssi
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                                       remote management boxes




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                                       in transport and distribution                                                                    1
                                       systems. Surge arresters are
                                       positioned on the one side
                                       on the STN transmission line                                      Remote management box
                                       connecting the automat with                                         (flowmeter + automat)
                                       the control plant and,                           2
                                       on the other, on the 4/20mA                                                                     STN line
                                       connection linking the
                                       flowmeter with the sensor.                                                                                                   Control
                                                                                                                                                                    plant
                                                                                                                                     : protections



                                       Flowmeter with integrated sensor                                                                             co
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                                       into the flowmeter, only the
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                                       automat needs protection. In                                                                1
                                       this case, a surge arrester
                                       must be installed on the
                                       4/20mA connection linking
                                                                                                                  Automat
                                       the automat with the
                                       flowmeter. The STN*               2
                                                                                                                                STN line
                                       transmission line connecting
                                       the automat with the control
                                                                                                                                                                 Control
                                       plant must also be protected                                                                : protections                 plan
                                       as explained in the example
                                       above.                        1 STN                  link protection
                                                                                Name                Imax (8/20)       Reference                    Function / Comment

                                                                        OVR TC 200FR P                   10 kA    2CTB804820R0500                               STN*


                                                                         2       Transmission line protection
                                       * Switch Telecom Network :               Name                Imax (8/20)      Reference                     Function / Comment
                                       analog telecom line
                                                                              OVR TC 6V P                10 kA    2CTB804820R0000                    RS422/RS485 - Profibus DP


                                                                         2       Transmission line protection
                                                                                Name                Imax (8/20)      Reference                     Function / Comment

                                                                          OVR TC 24V P                   10 kA    2CTB804820R0200 LS - 4/20mA - 4/20mA HART - Profibus PA
DIRECT STRIKES
         Protection
of storage systems
                      Protection against direct
                      strikes on structures such
                      as water towers requires the                                                                                       Simple rod
                                                                                                                                     or OPR 30 lightning
                      installation of an ESE                                                                                             conductor
                      or a simple rod lightning
                      conductor (on the upper part)                             ion line pro
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                      and implementation




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                      of an efficient earthing
                      connector. The resistance                                                              3
                      of the lightning earthing
                      connector must be less than
                      10 ohms. Appropriate
                      inspection equipment is used
                      to check this resistance
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                      at the time of installation.                           m lin protec
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                      According the IEC 62305-4,
                      the installation of a Type 1                                                           2
                      SPD upstream of the facility
                      is necessary in case of an
                      external lightning protection
                      system.                                                 power supp
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                                                                                                             1
                                                                                                                 Transmission line




                       1   Protection of the power
                           supply line input
                                                                                      Power
                         Name            OVR T1 3N 25 255-7                           input                    Level and flow        Sensors
                      Iimp (10/350)            25 kA                                                         rate measurement,
                                                                                                                   remote
                      Reference          2CTB815101R8800                                                       management…

                      Function                Type 1

                       2   STN line protection
                         Name            OVR TC 200FR P
                      Imax (8/20)            10 kA                                      : protections
                      Reference         2CTB804820R0500
                      Function                STN

                       3   Transmission line
                           protection
                         Name             OVR TC 24V P
                      Imax (8/20)                10 kA
                      Reference        2CTB804820R0200
                      Function    LS; 4/20mA; 4/20mA HART; Profibus PA
                                 Imp. Carret-Vène - Septembre 2007-




ABB Lightning Protection Group
22, rue du 8 Mai 1945
95340 - Persan
France


Tel : +33 (0) 1 30 28 60 88
Fax : +33 (0) 1 30 28 60 79

								
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