power systems

Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
COMPANY OVERVIEW
MESAR S.r.l., estabilished in 1986, works in the field of the design and manufacturing of
electronic equipments, in power conversion, data transmission and integrate supply fields.
Our products find applications both in the terrestrial field, naval, avionic and railway, both
civil and military versions.
Technologies are highly innovative, they come from collaborations with research institutes,
universities and international companies.
Ing. FAGGIONI, member of the committee IEC and CENELEC for the standardization of
the products in power supply area.
Mesar is composed of experts coming from well know Companies as Contraves,
Elettronica, Mes, Selenia, Pulsar etc., with great experience in the field of the scientific
search and development.
The company is located in an industrial area of 3000m2, close to the National Road
Tiburtina, nearby Tivoli and Villa Adriana.
Today mesar is composed of 52 employees:
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Management
Marketing
Administration
1
3
2
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Production
R&D
Quality assurance
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22
2
Mesar’s main customers:
o
o
o
o
o
o
SELEX SI
MBDA
DATAMAT
OTO MELARA
GALILEO
EUROSYSNAV
o
o
o
o
o
o
AVIOLACO
IAS (CNR) ATTIVITA’ SPAZIALI
SELEX – COM
CISDEG
VITROCISET
RHEIMETALL ITALIA
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
INTRODUCTION
MESAR S.r.l. an Italian company located in Tivoli nearby Rome is since 1986
active in the field of production for all kinds of electric and electronic parts and
devices for Military and Civil Applications. Navy, Air force, Army, Air traffic Control,
Railways.
MESAR also offers a wide range of after sales service, support and assistance to
the customer such as, among others: repairs of electromechanical and electronic
devices of highly sophisticated technological contents including overhauling of
UPS, generators, inverters, converters, power stations.
1986. Fabrizio Faggioni and Carla Corbani founded MESAR S.r.l.
1989. First collaboration with ENEA (Alternative Energies Italian Agency).
1992. Mesar realised the first static converter for railway application.
1993 Mesar became part of the companies cooperating with the
Ministry of University , technological & research dept.
1995. Mesar started developing a multivoltage battery chargers.
1996. Italian Navy qualified Mesar as Supplier for converters devices
1997 Italian Ministry of Defence assigned a NATO code to Mesar (A8746)
1999. Mesar produced a water cooled AC/DC Converters for INFN Linear
Technology.
1998. Mesar is qualified ISO 9001,
1998. Mesar has been qualified as RF and power conversion official supplier
by a Finmeccanica Company.
1999. Mesar produced air cooled AC/DC Converters for INFN Switching
Technology.
1999 Italian Navy qualified Mesar as Supplier for Electric & Electronics military
devices
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
2000. Trenitalia (Italian Railway Agency) qualified Mesar as
“Static converter official supplier”.
2001. Mesar opened a second workshop in Tivoli, the covered area grows
up to 2000 m2
2002 Mesar obtained a Quality qualification from Italian Navy
2003 Contract with Indian Air Force for the supply of Fiber
Optic Radar data link for 20+20 military Airports. Has been awarder to
Mesar
2004. The high efficiency power converter (>94%) on service,
Mesar award a fund for high innovative products from E.U.
2005
RAI (Italian Television network Agency) qualified Mesar as Supplier for
converters
2006. The Mesar obtained ISO 14001.
2007. Mesar participated to the upgrading of N. 6 FREGATES “Maestrale”
Class and N. 2 Antiaircraft Battle Ships “DDG” Class for
Italian Navy.
2007. Ansaldo Breda qualified Mesar as “Static converter official supplier”.
2007. Mesar has been appointed by EUROPEAN COMMISSION as official
Supplier.
2007. The Mesar starts the construction of the new Factory, the covered area
will grow up to 7000 m2
2008 Mesar has been qualified by RFI (State owned Organization for Railways)
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
In the last years Mesar designed and produced for the Italian and international
Customers different kinds of equipment with innovative solutions and state of the
art technology.
Mesar equipment are characterized from robustness and high reliability, typical
requirement of the military and civil applications.
Mesar proposal is characterized by:
More than 20 years of experience
Advanced technical solutions
State of the Art
High performances
High efficiency
High reliability
Field proven equipment
Fully Compliant with NATO Military Standards
After Sales Support
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
INTEGRATED SYSTEMS
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Power conversion systems for Raylwais & Rolling Stock
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Military Systems for Navy, Army and Air Force
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Air Traffic control Systems
ACTIVITIES
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Production
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Site survey
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Project Management
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Programs Management
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Contract Management
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Installation
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Commissioning
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Factory & Site Acceptance tests
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Repair
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Logistics
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Maintenance
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Training
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Upgrading
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Revamping
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
CONTROL TOWER FOR NAPOLI HARBOUR
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
NON - DIRECTIONAL BEACON
Installation and maintenance
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
CONSOLES
PM396
OPERATING CONSOLE
NAVY WEAPON SYSTEMS CONTROL UNIT INCLUDES:
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VME COMPUTER
ACQUISITION CARDS
HD, CD-ROM
FDDI / LAN COMUNICATION
TWO KEYBOARDS (ONE MULTIFUNCTIONAL)
TRACK – BALL
LCD DISPLAY POWER
POWER ASSURED BY UPS
PDU FOR:
POWER CONTROL
FAN CONTROL
DC SERVICE POWER
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
MULTI OPERATORS
DISTRIBUTED INTELLIGENCE PHILOSOPHY
ATC CONSOLES:
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COMPUTERS
LARGE SCREEN HIGH RESOLUTION COLOR DISPLAY
Communication Systems VCCS
GPS
TIME CODE GENERATORS
NAVIGATION AIDS (ADF, GONIO)
Ground to Air Communication
METEREOLOGICAL Stations
MESAR is able to integrate a full Air traffic Control Centres
composed of different kind of equipment including Control
Towers and Navigational AIDS
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
REMOTE CONTROL SYSTEM FOR COMPUTER
INTERCONNECTION CONSOLES SYSTEM
PM258 – PM 259
COMPUTER LOCAL – REMOTE
SWITCHING SYSTEM WITH HIGH
DEFINITION VIDEO CAPABILITY
THE SYSTEM ALLOWS TO SWITCH LOCAL
– REMOTE WORK STATION (MAX 100mt
FOR 2KX2K VIDEO DEFINITION)
OPERATIVE SYSTEMS:
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UNIX
WINDOWS
THE SYSTEM CAN REMOTE:
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VIDEO (2000X2000)
KEYBOARD
AUDIO (2 CHANNEL)
RS232
AVOIDING FANS NOISE AND HEATING DUE TO THE PRESENCE OF COMPUTERS
IN THE CONTROL ROOM
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
MINI RADAR DISPLAY UNIT
PM292B
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ROUTING 4 GROUPS OF RADAR
VIDEO AND ANGOLAR SIGNALS
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REMOTE AND LOCAL CONTROL
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INTERNAL TEST SIGNAL
GENERATOR
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COMPACT SIZE
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BARCO® RADAR SCAN
CONVERTER COMPATIBLE
INTERFACE
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FRONT PANEL LOCAL TEST POINT
OUTPUTS
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19” RACK MOUNTING
THE MESAR PM292B MINI RDU UNIT IS A VERY VERSATILE EQUIPMENT THAT IS
ABLE TO ROUTE UP TO FOUR RADAR CHANNEL TO VIDEO PROCESSOR FOR
DISPLAY MANAGEMENT.
EACH RADAR CHANNEL IS MADE BY 4 ANALOG VIDEO SIGNALS AND 3 DIGITAL
SIGNALS (ACP, TRIGGER AND NORTH PULSE).
THE PM292B ALSO HAS A TEST SIGNAL SYNTHESIZER, WICH CAN HELP THE
USER FOR EQUIPMENT AND CONNECTIONS TESTING. THE SELECTION BETWEEN
THE DIFFERENT SIGNAL SOURCE CAN BE MADE THROUGHT FRONT PANEL
SWITCH, OR BY REMOTE CONTROLLING.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
COMMUNICATIONS, CODIFICATION, CODE CONVERSION,
STANDARD & SPECIAL PROTOCOLS
TRANCODIFIER
PM260
RS232 TO CD2 INTERFACE
THIS UNIT CONVERS PROTOCOL
RS232 TO “CD2” STANDARD SIGNALS
RS232
CD2
PM244
CD2 TO RS232 INTERFACE
THIS UNIT CONVERTS PROTOCOL “CD2” TO RS232
STANDARD SIGNALS
RS232
CD2
PM565
ADP INTERFACE
THIS UNIT CONVERTS PROTOCOL
“AIRCAT 500” TO “HDLC” STANDARD
SIGNAL
AIRCAT 500
RS232
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
PM179
MULTIPLE DATA ACQUISITION AND
RADIO TRASMISSION UNIT
RACK UNIT FOR MULTIPLE
PROVIDED MODEM INTERFACE AND
RADIO LINK
INTERNAL UPS AND POWER
DISTRIBUTION PANEL FOR EXTERNAL
SUBUNIT
220V IN
220 OUT 2KW 30” BACK-UP
PM 179 ASSEMBLY
PM181 MULTIMODEM SUB-UNIT
PM181
MULTIMODEM RACK UNIT
8 MODEM
34 Kbit/sec. “SWITCHED LINE”
230V 200W POWER
MULTIPLE LAMPS FOR ACTIVITY
CONTROLS
REAR CONNECTORS FOR
ERGONOMIC INTERCONNECTION
PM175
MULTISERIAL SWITCH / GATEWAY
16 + 16 RS232 INPUT LINE
1 LAN OUT
SINGLE OR MULTIPLE LINE
SWITCHING
3 UNITS 19” RACK MOUNTING
FRONT PANEL ACCESS FOR
CONNECTION/ONE
CHECK AND JUMPER
220V 200W POWER
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
PM247
MULTISERIAL SWITCH
96 + 96 INPUT - 96 OUT
12 CARDS + 1 CONTROL MODULE
REMOTE – LOCAL PROGRAMMING BY
RS232 DATA LINE
MODULAR CONSTRUCTION 19” RACK
220V 200W POWER
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
SSR TEST TRASPONDER
Test system for SSR performance on-line contral
Mode A,C,S level 3 flight ID
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
PM593 TEST TRANSPONDER
Mesar proposes a system to verify and control the performances and the functionalities of
the SSR (Secondary Surveillance Radars).
The “Test Transponder” equipment can be installed in the vicinities of the airport and it
supplies continuous information concerning the correct functionality of the SSR to the aim
of the safety of the air traffic.
The equipment is already predisposed for the new functionalities (Mode S) that will be
utilised in short time under the disposition of the ICAO and Eurocontrol, International
Agencies devoted to the Air Traffic Control for the rules and the safety of the national and
international flights.
The equipment is completely programmable and comes turnkey supplied provided of
transmission systems and infrastructures in single or double configuration .
The Test Transponder unit is an equipment for ATC (Air Traffic Control) systems that
permits to on-line check the SSR functionality because, when installed in a known position,
it responds to radar interrogations with the same massage format of an avionic
transponder with user programmable replay codes.
The unit has been designed with modular architecture and in compliance with ICAO
requirements for mode 3/A, C and S (levels elementary 1-2 e level enhanced 3).
The user can enable/disable the mode S funtionality, so the test transponder can simulate
a target with identity code and quote user defined (if only mode A/C are enabled) or a
target with mode S reply user defined (if mode S is enabled).
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
A replay delay is also applicable to place the simulated target in a specific position far
away from the site of installation and the input/output levels can be adjusted by means of
two programable attenuators.
The test transponder can be managed from local, by means of a touch screen control
panel, or from remote, by means of a redundant ethernet connection TCP/IP.
Hereinafter the block diagram of the unit.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
The unit can be installed in single or double redundant configuration, in order to obtain the
requested reliability level.
In redundant systems, the units can share the same antenna (partially redundant system),
or every unit can be directly connected to its antenna (completely redundant system).
In a partially redundant system, only one unit is normally active and the other one is a
reserve that became active only in case of failure of the main test transponder.
In the following figure a completely redundant system example is reported.
The benefits of the completely redundant system (respect to partially one) are:
Operative benefit - The spare unit is not a "cold unit" but, with an opportune delay
time in the reply, it can be seen by the SSR as a second test unit, virtually displaced
from the first TTU unit .
Logistic benefit - The maintenance actions needed to replace an eventually broken
unit don't stop the workability of the system.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
SHELTER KIT FOR TEST TRANSPONDER INSTALLATION
It is a relatively compact and lightweight shelter, purpose-made to accomodate all the
system devices set and the technicians for the normal maintenance.
It is easily to assemble it on a metal or cement base and the technical personnel can
access into it by a door. The shelter is provided with a thermal insulation walls and an air
conditioner system to preserve the internal temperature into the system operative
temperature range .
The shelter is provided mechanically and electrically preassembled except for the
antenna's pole that will be positioned on the place. Four strong hooks placed on the roof
make possible to easily transfer it to another place with a normal lift-up machine.
The shelter can be dispatched with common terrestrial or marine means of transports.
The shelter is available in two different versions: 2x2m and 2.5x2.5m both with 2.9m of
height.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
Equipment cabinet
Rack standard 19”
Antenna
Housekeeping system
Air conditioner system
TTU
Air conditioner system
UPS
Auxiliary
system
Housekeeping system
It is an active and passive monitoring system to supervise the weather and security status
of the installed system.
It is composed of an anti-intrusion system that alert headquarter in case of any nongranted access or sabotage.
The environmental control into the shelter is performed by a set of sensors to monitor
constantly the temperature, humidity and presence of smoke.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
Redundant Climatization
In extreme conditions weather places, the thermal insulation walls of the shelter could be
not enough to guarantee the optimal environmental conditions for the system. In this case,
optionally, the shelter can be arranged to lodge a redundant air conditioner system.
Rack Standard 19” or Mini Rack 19”
Inside the shelter are present a set of 19" standard rack with depth range from 500mm to
800mm and 2105mm maximum height.
Depending on the selected system (simple system or redundant system) the basic kit is
provided with one or two 19" mini-racks as represented in the following figure.
L 600, P500, H 736 mm
Optionally, different sizes for the rack are available to fits particular requirements. The
available racks are reported in the following table.
Type
Rack 19”
Rack 19”
Rack 19”
Rack 19”
Rack 19”
Rack 19”
Width(mm)
600
600
600
600
600
600
Depth(mm)
600
600
600
800
700
800
Height(mm)
1215
1702
1967
1967
2105
2105
All available racks are DIN - IEC - CEI standards compliant.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
UPS
In order to guarantee a protected, stable and continuous power supply, a UPS system is
provided with the basic installation kit. The UPS is outfitted to operate with all common AC
power network.
Antenna
The provided antenna is a flat panel type antenna with a 15dBi gain and +/- 12.5° main
beam aperture. The directionality is required to avoid unwanted interrogations issued from
the other SSR eventually present nearby. The antenna is equipped with an N-type
connector, and preferentially must be used with RG8-type cable or equivalent. Different
cable could be used too, but in this case the associated power loss must be carefully
considered.
Discharge devices
To complete the kits, various optionally protection devices are available:
•
•
Current discharger for the antenna to redirect the high energy loads of the lightnings
on the RF lines.
Voltage discharger to guarantee the dielectric insulation of the devices installed
inside the shelter.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
PM672 TRANSPONDER with TARGET GENERATOR
L’assieme PM672 è un TRANSPONDER, disponibile in banda S, L, C, X ed utilizzabile, in
fase di testing del radar primario, per simulare la presenza di un target posto ad una
specifica distanza dal radar, in posizione fissa o in movimento rispetto ad esso.
Nello specifico, l’impulso radar ricevuto viene opportunamente elaborato (filtrato,
amplificato,
eventualmente
ritardato
temporalmente
e
shiftato
in
frequenza)
e
successivamente ritrasmesso verso il radar.
Tramite l’utilizzo di opportune linee di ritardo in fibra ottica, è possibile introdurre sull’eco di
ritorno un delay (settabile a step di 20µsec nel range 20÷140µsec) per fare in modo che il
target simulato venga visto dal radar shiftato in distanza, ovviando così alle problematiche
che l’utilizzo dell’STC (Sensitivity Time Control) compoporterebbe per installazioni del
transponder fatte a distanze troppo ravvicinate rispetto al radar.
È possibile introdurre sull’eco di ritorno uno shift in frequenza (selezionabile nel range
0.2÷200kHz a step di 1Hz) per fare in modo che l’eco di ritorno venga visto, per effetto
doppler, come un oggetto in movimento ad una specifica velocità.
Inoltre è possibile agire sui livelli di potenza ricevuta e ritrasmessa settando
opportunamente due attenuatori programmabili inseriti sulle linee di ricezione e
trasmissione, rispettivamente.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
Tipici utilizzi del transponder sono l’allineamento del radar primario e la determinazione del
pattern d’antenna.
Con riferimento al diagramma a blocchi riportato di sopra, tutta l’elaborazione del segnale
radar è effettuata nella
sezione RF con la gestione della logica di controllo. Il PC
costituisce l’interfaccia tra la logica di controllo ed il monitor LCD/touch screen presente
sul pannello frontale ed utilizzato come interfaccia utente, per eseguire le operazioni di
settaggio e controllo.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
PM870 S BAND MTI MARKER
Il PM870 è un MTI MARKER operante in banda S ed utilizzabile per effettuare
l’allineamento del radar primario.
Durante il suo funzionamento operativo, l’MTI Marker ritrasmette l’impulso ricevuto dal
radar primario introducendo su di esso un effetto doppler, per fare in modo che l’eco di
ritorno passi attraverso il filtro MTI del radar e si presenti sul monitor PPI del controllore
come un riferimento stazionario.
L’MTI Marker, nella sua configurazione standard, si compone di tre parti principali:
1.
Antenna
2.
Riflettore attivo
3.
Alimentatore AC/DC
L’antenna è un’antenna a pannello a polarizzazione lineare che viene accorpata al
riflettore attivo in un’unica soluzione meccanica, per garantire ingombri ridotti e maggiore
facilità di installazione. Per avere la possibilità di lavorare sia in polarizzazione orizzontale
che verticale il montaggio dell’antenna sul riflettore è invariante per rotazioni di 90°.
Il Riflettore attivo è dotato (dal lato opposto rispetto all’antenna) di appositi supporti per
montaggio su palo e, nella sua configurazione tipica, viene alimentato in continua
(+12VDC) tramite un alimentatore AC/DC da installazione indoor.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
Opzionalmente il riflettore attivo può essere alimentato con batteria standard da 12VDC
per autoveicoli oppure a pannelli solari.
Sono disponibili due diverse versioni di riflettore attivo che differiscono tra loro per la
possibilità di introdurre o meno una amplificazione ed un delay sull’eco di ritorno.
Nella versione più semplice (non amplificata e senza delay) ed economica, il riflettore
attivo si presenta come nello schema a blocchi riportato nella figura seguente.
Dal punto di vista funzionale, l’impulso radar ricevuto viene rivelato per determinarne la
durata temporale e per consentire la sincronizzazione dello sfasamento doppler con la
PRF del radar.
In particolare, lo sfasamento introdotto è tale da impostare la frequenza doppler ad un
valore pari a PRF/2. Al variare della PRF, la frequenza doppler viene automaticamente
riadattata al nuovo valore di PRF, evitando così ogni intervento manuale sul dispositivo
durante il suo funzionamento operativo.
L’elaborazione sulla fase viene fatta sul solo impulso “corto” (durata tipica di 1÷10µsec)
per fare in modo che l’impulso lungo, originando un eco di ritorno con fase sempre
costante, venga visto dal radar come un bersaglio fisso e quindi cancellato.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
L’altra tipologia di riflettore attivo, consente di inserire una amplificazione ed un delay
sull’eco di ritorno.
Dal punto di vista funzionale, l’impulso radar ricevuto, dopo essere stato opportunamente
filtrato ed amplificato nel front-end, viene rivelato ed elaborato per determinarne la durata
temporale: anche in questo caso, un impulso “corto” (durata tipica di 1÷10µsec) viene
processato e ritrasmesso al radar mentre un impulso “lungo” viene soppresso
(commutando l’antenna su un carico a 50Ohm).
Il processamento dell’impulso corto consiste nell’introdurre uno sfasamento doppler che,
come nel caso precedente, si sincronizza automaticamente con la PRF del radar, ed un
delay.
Il delay viene ottenuto con l’utilizzo di un link ottico a modulazione diretta e di un
avvolgimento in fibra ottica di opportuna lunghezza (quella corrispondente al ritardo
desiderato).
La possibilità di poter avere un target shiftato in distanza (rispetto alla posizione fisica di
installazione dell’apparato) e di maggiore intensità (rispetto al caso precedente), predilige
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
la scelta verso questa tipologia di riflettore in tutte le applicazioni in cui sia richiesta ampia
versatilità nella determinazione del sito di installazione.
Per entrambe le tipologie di MTI Marker, è possibile effettuare il set up ed il monitoraggio
sul corretto funzionamento tramite un apposito pannello di controllo, accessibile da uno
sportello a tenuta posto nel lato inferiore del riflettore attivo.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
PM1074 X BAND MTI MARKER
Il PM1074 è un MTI MARKER operante in banda X ed utilizzabile per effettuare
l’allineamento del radar primario.
Analogamente al PM870 è anch’esso costituito da un’antenna ed un riflettore attivo che
vengono accorpati in un’unica soluzione meccanica per garantire ingombri ridotti e
maggiore facilità di installazione.
In questo caso l’antenna è un paraboloide a polarizzazione circolare con la possibilità di
essere configurata per lavorare sia con polarizzazione destrorsa che sinistrorsa.
Per quanto riguarda la modalità di installazione, il sistema di alimentazione ed il principio
di funzionamento valgono le stesse considerazioni fatte per il caso del PM870.
In particolare, anche per questo prodotto sono disponibili due versioni distinte di riflettore
attivo che differiscono tra loro per la possibilità di avere o meno un guadagno ed un ritardo
sull’eco ritrasmesso, con diverso impatto sulla versatilità di installazione.
Anche per questo apparato, da un apposito sportello a tenuta allocato sul lato inferiore, è
possibile accedere ad un pannello di controllo per eseguire le operazioni di configurazione
e di monitoraggio.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
PM1102 ADS-B GROUND STATION
Il PM1102 è una stazione di terra in grado di ricevere i dati trasmessi dai velivoli che si
trovano nella propria area di sorveglianza, elaborarli e codificarli in modo opportuno per
trasferirli al centro di controllo ATC (Air Traffic Control).
Le informazioni ricevute, relative alla posizione dell’aeromobile, alla sua quota ed al suo
identificativo, vengono raccolte nel centro ATC, fuse eventualmente con altre informazioni
(provenienti ad es. da altri radar secondari) e sfruttate per:
migliorare l’ affidabilità nei servizi di ATC;
estendere il controllo del traffico aereo in zone prive di copertura radar;
controllare i veicoli in movimento a terra, nelle zone aeroportuali.
Più nello specifico, le ground stations si inquadrano all’interno di un contesto integrato di
ricezione che, nella sua configurazione tipica, si compone delle seguenti parti principali:
Una o più stazioni riceventi (AGS - ADS-B Ground Station)
Un sistema di elaborazione (ARS - ADS-B Reporting System)
Un sistema di gestione (AMS - ADS-B Management System)
Una unità di registrazione (REC - Recording)
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I dati ricevuti dalle AGS vengono dapprima elaborati localmente per demodulare il
contenuto informativo, codificarlo in formato Asterix cat.21 ed inviarlo, tramite connessione
ethernet ridondata, verso il centro di elaborazione (ARS).
Il centro di elaborazione, anch’esso ridondato, seleziona (con opportuno criterio di scelta) i
pacchetti provenienti dai due canali di ingresso per estrapolare un unico flusso dati in
uscita da instradare (in modalità ridondata) verso il Radar Data Processor (non riportato
nella figura di sopra).
I dati che transitano sulle due LAN sono accessibili anche dal Management System (che
svolge le funzionalità di monitor tecnico e di presentazione dei dati), oltre che da una unità
di registrazione (REC).
Dal punto di vista costruttivo, gli apparati relativi all’ARS ed al Recording vengono
realizzati in rack standard da 19” e posizionati in armadi, l’unità AMS è un server di tipo
tower, posizionato nei pressi della postazione di supervisione.
Per quanto riguarda le AGS, si possono avere sia soluzioni indoor (rack standard da 19”)
che outdoor (in cui tutta l’elettronica è contenuta all’interno di un box a tenuta stagna).
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Nell’ottica di migliorare l’affidabilità del sistema, la stazione ricevente è completamente
ridondata.
Ciascun canale ricevente utilizza un’antenna omnidirezionale ed un ricevitore a
demodulazione di inviluppo, per rivelare gli squitter emessi sulla portante di 1090MHz e
fornire un segnale video in uscita, che viene successivamente elaborato dalla sezione
digitale (scheda processing e single board computer). L’elaboratore digitale effettua la
decodifica dei messaggi ADS-B ricevuti e la loro successiva ricodifica nel formato “Asterix
cat.21” (richiesto per l’invio dei dati al centro ATC). Inoltre, gestisce lo scambio di
messaggi di monitoraggio e controllo utilizzando il protocollo SNMP (Simple Network
Management Protocol).
Il flusso dati (protocollo Asterix) ed i messaggi di gestione e controllo (protocollo SNMP)
vengono inviati su connessione LAN, ridondata per ciascuno dei due canali riceventi.
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Ciascuna stazione contiene un trasmettitore di test che, ogni qualvolta venga richiesto dal
sistema di gestione (AMS), emette, sulla portante di 1090MHz, un segnale noto che viene
ricevuto e decodificato da entrambi i canali riceventi: dalla comparazione del segnale
video demodulato con il segnale di riferimento noto, il sistema è in grado di verificare il
corretto funzionamento di ciascuna delle due catene riceventi.
Inoltre, le Ground Stations integrano un ricevitore GPS (anch’esso ridondato) per
consentire di effettuare le operazioni di:
correzione dei dati di posizione;
sincronizzazione dell’orario.
Il sistema stazione-antenna definisce il centro di un area che si estende fino al limite di
copertura del sistema, oltre il quale non è possibile ottenere la decodifica affidabile dei
segnali provenienti dagli aeromobili.
Aumentando il numero delle stazioni si ottiene un sistema più affidabile e preciso mentre
distribuendo più stazioni sul territorio si aumenta anche la copertura del sistema.
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RADAR EXTRACTOR & TRACKING SYSTEM
The Radar Extractor and Tracking System (RETS) processing performs by the following
main functions:
Clutter Map Processing and Constant False Alarm Rate (CFAR) Threshold
Generation
Plot Extraction
Track While Scan (TWS)
Hereinafter is shown a block diagram with the main functional blocks of the RETS:
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The RETS performs a clutter adaptive processing in order to determine the constant false
alarm rate threshold for target detection (hit) in any weather conditions .
The RETS performs processing of the radar digital raw video based on CFAR and Clutter
Map techniques in order to calculate, for each radar cell over all covered zones,
appropriate detection threshold with 10-6 constant false alarm rate. CFAR and Clutter Map
algorithms are designed to mitigate masked zones and reflections effects generated by
existing buildings.
In case of absence of analog video data the RETS stops its functionality by providing an
alarm message to the operator and by freezing the situational map (thresholds, extraction
parameters, ….).
The Plot Extraction function makes RETS capable to generate the plot object starting from
a cluster of target hits.
The Plot Extractor has been designed in order to associate a radar plot object for each
moving or fixed target (i.e. aircraft) onto all airport covered areas. Separate cluster of hits
of two near targets are processed as two separate target plots and not fused.
The Plot Extractor is able to manage very large targets (like a big aircraft) as well as very
small targets (vehicles) onto covered zones. One large target detected as more than one
cluster of hits (target splitting effects) is processed as one target
The Plot Object is basically represented by the geometric/gravity centre coordinates of the
associated target’s hits cluster. The plot coordinates are corrected by taking into account
the antenna height above the ground.
The Plot Extractor is able to inhibit plots generation in certain required zones according to
the Plot Inhibition Map (PIM). This functionality, useful for instance in case of radar signal
reflections, is selectable and adjustable in off-line mode by dedicated Plot Extractor
Maintenance tool in Maintenance Technical Display (MTD).
The Track While Scan function has the task to generate the Target Report starting from a
target plot object. The algorithms are based on robust Kalman filtering to avoid track loss
and false target report.
The TWS provides Target Report of all fixed and moving detected/extracted targets inside
airport covered zones (Apron area and Movement area: taxiways and runways).
The RETS transmits data (tracks and plots) by using Ethernet 1000 Base T LAN with
TCP/IP protocol. The RETS provides as output Target Reports (tracks and plots data)
according to EUROCONTROL ASTERIX CAT10 standard protocol format.
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The setup of RETS functionalities is performed by acting on a dedicated Maintenance
Technical Display (MTD) designed basically for system maintenance purposes and
performances evaluation.
Through HMI is available the presentation of the following data:
Airport Topographic Map with Apron and movement areas
Raw radar video (PPI with range and azimuth information) by using at least 8 bit
colours palette
hits
plots
tracks
The HMI presents the following RETS status information:
BITE ON (OFF) (the RETS is running with video test)
RETS RUNNING OK (NO OK)
RETS OFF LINE
The HMI presents all RETS alarms like for instance:
analog radar video missing
ASTERIX LAN disconnected
too many plots
too many targets
The RETS is based on a standard 19” industrial rack PC with LINUX Professional
platform,.
The RETS PC is powered by standard 220/230 V 50 Hz.
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AIR CONDITIONING – COOLING CONTROL SYSTEMS
MAIN CONTROL SYSTEM mod. PM533
Main Control System designed to drive the Blower Shutters PM 510 to be used for A/C
systems and Cooling Systems.
BLOWER SHUTTER mod. PM510
The motors are connected to relevant mechanical Valves and drive by the Main Control unit
PM 533. Air flow is regulated according to pre-setted parameters and temperature values.
38
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HEATING SYSTEM mod. PM806-807
The preheating battery is constituted from a container which dimensions are
adapted to being fixed to wall, inside of a premises, in correspondence of the
openings of income of the air of ventilation of a conditioning unit. The container will
concur the passage of the air and will lodge the heating elements necessary
(resistors) to carry out the assigned function.
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TEMPERATURE CONTROLLER mod. PM 750
Designed to measure and display the ambient temperature up to a distance of 50mt from
the headquarter.
The use is ideal in housekeeping system to monitor constantly the temperature in the
system room (or shelter, etc.).
Temperature Sensor is powered by the industrial standard 4-20mA standard to minimize
the coupled noise.
The user can set the alarm/prealarm threshold in order to start visive and acoustic
signalling if the temperature is out of range.
Relay contacts are available in order to remote the alarms.
The unit can be programmed via serial port and optionally with LAN.
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RADAR SIGNAL GENERATORS
PM 498
PM498
DINAMIC MODULAR RADAR SIMULATOR
-
-
-
EUROCARD SIZE
RADAR SIMULATION WITH:
- VIDEO PULSE WIDTH 0,5÷100ns
- VIDEO DISTANCE 1÷250 miles
- RPM 1 TURN EACH 4÷12 sec.
- PRF 250÷1000Hz
CHARACTERISTICS:
- 4 VIDEO SIGNAL
- 1 TRIGGER
- 1 ACP SERIAL 12 -14 -16bit
- 1 NORD RS422
LCD DISPLAY FOR EASY SET-UP AND CONTROL
VIDEO & TRIGGER COAX 5V 75 ohm
ACP & NORD
DIFFER RS422
POWER 15Vdc≤1A
The PM498 is a programmable generator of Radar Video Signals, to be integrated
in an appropriate slot of MINI RDU Mod. PM292.
The generator emulates four VIDEO and its relevant TRIGGER, ACP and NORTH.
The PM498 is fully programmable through a menu interface by means of the
controls located on the front panel.
The PM498 is able to emulate an immense range of radar scenes generating
various types of marks corresponding to search radars, approach radars, Tracking
radars etc.
The set of signals and programmable functions available render the PM498 an
able instrument to optimize the procedures of installation, testing, setting up and
maintenance of Radar Display Systems
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MAIN FUNCTIONALITIES of the PM498
• Emulation of Signals ACP, NORTH, TRIGGER, VIDEO
• 4 VIDEO Signals independently configurable
• Trigger with parametric PRF from 250 to 1500 Hz
• Emulation of trigger of STAGGERED type
• Configurable ACP, 12 or 14 bit
• Configurable Antenna rotation Period.
• Emulation of video RING type, fixed target, target in motion
• Possibility of sectorization of rings
• Programmable distance of the targets from 1 to 250 NM
• Configurable angle-shot of the targets to steps of one degree
• 10 memories for the storage of the scenes
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RACK MOUNTED RADAR SIMULATOR
PM363
-
FRONT PANEL DISPLAY
FRONT PANEL SWITCH
SIMULATION OF FLIGHT “ROUND WITH 4
PRESET DISTANCES” CHARACTERISTICS:
- 2 VIDEO SIGNAL (75hom)
- 1 TRIGGER (75hom)
- 1 ACP (PARALLEL 14 bit) RS422
- 1 NORD RS422
Questi apparati trovano applicazione nei test e nella simulazione di scenari radar, i
particolare :
- Generare segnali radar per verificare la funzionalità ti tutta o parte della struttura radar
aeroportuale
- Verificare la funzionalità di una parte (per es. i terminali video) quando il resto del
sistema è in operativo.
- Generare carichi anomali virtuali di traffico aereo per verificare le prestazioni del sistema
in caso di “sovraccarico” – “troppi aerei da controllare simultaneamente”.
- Generare un segnale radar “anomalo” per verificare come le apparecchiature e gli
operatori reagiscono di fronte ad un problema.
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DYNAMIC RADAR EMULATOR
PM614 & PM615
PM614 and PM615
The PM614 is a module that adds to the functionalities of the PM498 a output
driver interface, in this case is possible to use the equipment as stand-alone
generator based on rack 19 ' '. as all the MESAR series of Fiber optic systems for
radar data transmission.
In alternative the generator PM614 can be lodged inside of mini-rack as portable
instrument inclusive of battery package.
Associated to the portable mini-rack MESAR PM615, generator PM614 on hand
allows to have a most useful instrument, portable and easy usable on the field
installation, testing, setting up and maintenance of Radar Display Systems
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MAIN FUNCTIONALITIES of GENERATOR PM614
The PM614 includes all the functionalities of the PM498, and moreover:
• Output driver for unbalanced signals (on BNC) and balanced signals RS422
on multipolar connectors type “D” on the front panel
• 4 Video signals, with relevant Trigger, North, ACCP.
• Parallel ACP output 12/14 bit
• Completely independent and transportable, with rechargeable batteries if
associated to minirack PM615
• Rack 19 ' '(32TE)
MAIN FUNCTIONALITIES of MINIRACK PM615
• Rechargeable batteries package
• Quick Built –in Battery Charger
• Possibility of lodging of modules of MESAR series like video splitter, RS422
splitter, emitters and receivers on fiber optic, etc
(8TE available with Inserted PM614)
PORTABLE MINIRACK mod. PM 615
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Example of Radar Signal displayed
Fixed Target
Moving Target
Full Scan
Sectorized Ring
Interface Menu Display
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Y COUPLER mod. PM861
Y COUPLER mod. PM681
Description:
Redundant serial interface router with capability to route an input signal to dual output
interface (the messages are doubled in order to achieve the maximum exchange
reliability).
The unit can be SW reconfigurable as Ethernet-to-Serial Gateway maintaining the
redundant functions or perform a multihead gateway.
Benefits:
• Gateway HDLC-IEEE802.3
• HDLC I/F doubler
• HDLC Hub-Switch
• IEEE 802.3 Hub/Switch
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GPS mod. PM803
TIME CODE GENERATOR
GPS Network Time Server mod. PM803
Description:
Designed for network synchronization, the unit will act as NTP server on standard LAN
systems. For single unit synchronization it is possible to use a standard RS232 interface.
Standard interface protocols are used, the NMEA 0183 for input serial interface and NTP
protocol for LAN, simplifying and minimizing the engineering costs associated with
integrating task. The output serial interface can be user tailored via SW.
Programmed with serial port, USB or LAN.
Optionally the unit is able to transmit the geographical position.
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ANTENNA MOTOR DRIVE UNIT
PM318 - amdu
ANTENNA SOFT - START
-
DOUBLE MOTOR
DOUBLE STARTER
REMOTE CONTROL
EMI FILTER
ELETTRONIC UNIT FOR ANTENNA’S SOFT
START
THE UNIT DRIVES TWO ELETTRIC MOTOR BY
TWO SOFT STARTER IN ORDER TO ASSURE
RELIABILITY.
THE UNIT OPERATES IN LOCAL – REMOTE
MODE WITH DIAGNOSTIC PANEL A DOUBLE
EMI FILTER PROTECT THE UNIT AND LINE
FROM NOISE.
MOTOR CONTROL SYSTEM PM 775 – PM809
3Ø INVERTER FOR MOTOR SPEED CONTROL
3KW
TRIPICAL APPLICATION
- SMAL ANTENA ROTATION
- COOLING CONTROL
- FAN CONTROLS
INPUT 380 ÷ 440V 3Ø 50÷60Hz
OUTPUT 0 - 400V 3Ø 0 – 60Hz
SINUSOIDAL OUTPUT WAVE EMI FILTRED
3kw pm775
10kw pm809
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PM207
SAFETY SWITCH
FOR THE SAFETY OF THE OPERATORS
-
USED AS SECURITY BLOCK OF UNITS THAT COULD MOVE OR TURN
USED FOR MOTORS UP TO 40Kw
CHARACTERISTICS:
- 4 CONTACTS
- 660Vac MAX
- 63A FOR CONTACT
-
380V 3Ø 50Hz
USED TO PUT DOWN NETWORK ARMONICS
THE UNIT ELIMINATE DIFFERENTIAL AND COMMON MODE NOISE
USED TO PREVENT NETWORK TROUBLES PROPAGATE TO THE USES
USES TO PREVENT THAT USERS NOISE PROPAGATE TO THE OTHERS
INTERNAL FAN COOLING
DIGITAL INSTRUMENTS FOR VOLTAGE – CURRENT – POWER COS Φ
AND FREQUENCY MEASURAMENTS
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FIBER OPTIC
51
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OPTICAL FIBER MODEM mod. PM645
THE TTU IS BASED ON A MODULAR HW ARCHITECTURE USED TO MEET THE
DIFFERENT ICAO REQUIREMENTS AS MODE A OR C OR S WITH DIFFERENT
LEVELS.THE UNITS CAN BE INSTALLED IN SINGLE OR DOUBLE OR TRIPLE
CONFIGURATION IN ORDER TO ACHIEVE THE HIGHEST RELIABILITY LEVEL.
IN MULTIPLE INSTALLATION ALL THE UNITS COULD SHARE THE SAME ANTENNA OR
EACH UNIT CAN HAVE THE OWN ONE
THE TTU IS BASED ON A MODULAR HW ARCHITECTURE USED TO MEET THE
DIFFERENT ICAO REQUIREMENTS AS MODE A OR C OR S WITH DIFFERENT
LEVELS.THE UNITS CAN BE INSTALLED IN SINGLE OR DOUBLE OR TRIPLE
CONFIGURATION IN ORDER TO ACHIEVE THE HIGHEST RELIABILITY LEVEL.
IN MULTIPLE INSTALLATION ALL THE UNITS COULD SHARE THE SAME ANTENNA OR
EACH UNIT CAN HAVE THE OWN ONE
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FIBER OPTIC DATA TRANSCEIVER SYSTEMS
MESAR fiber optic systems are based on totally modular configurations, that permit easy
application-specific adaptation, easy system improvements, and easy failure fixing. Optical
links with length of over 20km without the use of intermediate amplifications are made
possible by the single-mode high-power laser transmitters used.
There are modules for many signal typologies, that can live together on the same
mainframe that furnishes the power supplies, optionally redundant, and the data bus for
the multiplexed modules.
Redundant data paths are also made possible by modular data switching systems.
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8 DIGITAL CHANNEL MODULES
PM310 (COAX TX) & PM311 (COAX RX) PM322 (RS422 TX) & PM323 (RS422 RX)
PM310, PM311, PM322 and PM323
modules are used to realize a transmission system
on
optical fibre of 8 digital signals (ON-OFF)
with unbalanced coaxial interface (0 … 5V)
or RS422 differential interface.
8 fast digital signals transmission by a single optical
fibre
RS422 or COAX input and output interface
COAX - RS422 mixed combination possibility
50ns sampling time
54
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PM271 RS232 MODULES
PM271 modules emulate a DCE RS232 peripheral and
implement the bi-directional asynchronous or synchronous
transmission-reception of serial data and control signals, typical
of RS232 standard (DTR, RTS, CTS, DSR, clock for
synchronous communications). Moreover, at the output of each
module PM271, an internally generated clock signal with jumper
configurable frequency up to115.2kb/s is also available.
As many as 16 RS232 channels can be implemented by a single
duplex fiber connection using the PM272 MASTER module.
PM276 & PM277 TELEPHONIC MODULES
PM276 and PM277 modules permit to extend a telephone line with full DTMF and decadic
composing support. PM276 module provides interface for the phone set and the PM277
module provides interface for the provider line. Line to Phone or Phone to Phone
connection are possible. As many as 16 phone channels can be implemented by a single
duplex fiber connection using the PM272 MASTER module.
PM371 BALANCED AUDIO WITH T/L MODULE
PM371 modules permit to extend a differential audio line and a
talk/listen signal. It can be useful to interface radio devices to
remote offices. As many as 16 audio channels can be implemented
by a single duplex fiber connection using the PM272 MASTER
module.
55
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PM304 & PM305
16 DISCRETE CHANNEL MODULES
PM304 & PM305 allow to recreate on the PM304 module the open-closed state of 16
contacts according to the configuration of 16 contacts applied to the PM305 module inputs.
As many as 16 channels each with 16 contacts can be implemented by a single duplex
fiber connection using the PM272 MASTER module.
PM272 MASTER MODULE
The PM272 MASTER module is used to multiplex on a single duplex optical link as many
as 16 modules among the ones described above that support the multiplexing function.
Other modules are available, like ethernet media converters, and other signal
typologies can be transceived on request. Contact MESAR sales manager for more
information.
56
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BUFFER/SPLITTER MODULES
Coax analog splitter modules (PM269) and 8 channel RS422 splitter modules (PM488) are
available to buffer one input to four outputs.
PM269 COAX VIDEO BUFFER
Bandwidth: DC to 10MHz
Input and output dynamic: -1V … 5V @ 75Ω load
Jumper configurable 75Ω input termination
PM488 RS422 BUFFER
Repetition on the 4 outputs of a series of 8 differential signals
Jumper configurable input terminations
SWITCHING MODULES
Switching modules for various typologies of signals are available to allow the
implementation of redundant data links, with automatic commutation logic that can
automatically switch to the secondary link in case of failure of the primary link. Remote
control of the switching state is also possible.
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PM270 MAINFRAME
The mainframe integrates the following functions:
Mechanical container
Single or dual supply system
Cooling system
BITE and remote signals system
Electrical data bus
It is endowed with sliding runners which allow to insert modules from the front. The
mechanical dimensions are for standard 19’’ rack
mounting.
ASSY FAILURE LED
CABLE AND AIR PASSING FOR VENTILATION
PM279 POWER SUPPLY
The PM279 power supply receives AC energy from the
transformers (with voltage selector) placed inside the
mainframe. The module converts AC into DC, filters it, and
provides optical and electrical status information.
Two PM279 can be placed inside a PM270 mainframe to
implement redundand power supply
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EXAMPLE OF APPLICATION
PHONES
ALARMS
PM272
PM305
2 F. O.
PM276
PM271
PM304
UP TO 40km
PM277
PM272
RS232 DEVICE
ALARMS
SURVEILLANCE
RS232 DEVICE
PHONE LINES
59
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EXAMPLE OF APPLICATION
PM274
PM275
60
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PM206 and PM208 MODULES
50/125 MULTIMODE FIBER DATA LINK
The PM206 module transmits five RS422 signals to the fibers and
receives two signal from the fibers, repeating them on two RS422 outputs .
The PM208 module is the complementary module for the PM206.
It receives from the fibers five digital signals, repeating them on five RS422 outputs, and
transmits two RS422 digital signals to the fibers.
5 MHz typical bit rate
propagation time ≈100ns + fiber path
1.5km 50/125 fiber link typical length
Jumper configurable RS422 input termination
MIL STD conformity
RS422
CH1
CH1
CH2
CH2
CH3
CH3
CH4
CH4
CH5
CH5
CH6
PM206
PM208
CH7
RS422
CH6
CH7
7 x multimode fibers
61
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POWER SYSTEMS
- UNINTERRUPTABLE POWER SYSTEMS UPS with
5 levels of redundancy
- AC STABILISER
- POWER FACTOR CORRECTORS
- DIESEL GENERATORS
- NETWORK FILTERS AGAINST NOISES & INTERFERENCES
62
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UPS – UNINTERRUPTABLE POWER SYSTEM
UNINTERRUPTABLE POWER SYSTEM FOR SAFETY AND SIGNALLING
(RFI IS732 Spec.)
The ON-LINE power system assures V/F stabilized feeding voltage to the loads, in several input
conditions, The unit is made up by the following sub-units:
a) AC section n°1 and n°2 made up by:
• rectifier
• Inverter
• static switch
b) Emergency AC section
• isolating transformer
• stabilizer
• static switch
c) DC Section
d) N°2 batteries
e) PFC section
f) controller section
• sectioning and protections
• logic and diagnostics
g) Generator
• Diesel engine
• Generator
• Generator logic
• Mains/generator switching unit
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
The system works ONLINE, normally the loads are feed through AC section 1; The AC section 2 is
the swappable hot-stand-by. In case of failure or an overload the loads are switched to the
emergency ac section Accumulators are always online, they feed the loads in the mean time
between the mains failure and the end of generator startup phase.
In case of generator failure the batteries feed the loads until they are discharged.
The generator is normal off, it substitutes the ac mains only in case of failure or if the mains is out
of tolerance. The DC loads are feed trough DC section Here below there is the list of the available
version of power system
POTENZE NOMINALI DEI MODULI BASE
SUB UNIT NOMINAL POWER
ALTRI DATI
OTHER CHARACTERISTICS
SISTEMA
INTEGRATO
UNINTERRUPTABLE
POWER SYSTEM
(400V 3Ø+N)
Rami
Corrente
Alternata
AC
output
Rami
Corrente
Continua
DC
output
Sezione
Rifasamento
PFC section
Gruppo
Elettrogeno
Generator
Capacità
Batteria
Battery
capacity
Elementi
Batteria
N°
elements
Corrente
Massima
Raddrizzatore
Rectifier max
current
Rendimento
Singolo Ramo
Raddr/Inverter
Single inverter
efficiency
(kVA)
10
15
20
30
40
50
60
75
100
140
180
225
300
360
(kVA)
10
15
20
30
40
50
60
75
100
140
180
225
300
360
(kW)
5
5
5
10
10
10
10
10
10
10
10
10
10
10
(kVAR)
15
22
30
44
57
69
84
106
137
193
252
308
395
492
(kVA)
15
25
30
50
60
75
100
120
150
200
270
340
450
550
(Ah)
50
75
100
150
200
250
300
400
500
580
800
1000
1160
1600
N.
120
120
120
120
120
120
120
120
120
156
156
156
156
156
(A)
55
80
110
160
200
250
290
380
500
540
700
850
1100
1360
(η)
≥80
≥80
≥80
≥80
≥80
≥85
≥85
≥85
≥85
≥85
≥88
≥88
≥88
≥88
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
POWER FACTOR CORRECTOR / PFC
PFC section is made up by an ACTIVE FILTER working by compensation,: the active filter injects
on the line the same harmonics generated by loads but with the opposite sign, this allows to
reduce the rejected harmonics to a value near zero.
To ensure a good power factor correction the unit generates three sinusoidal current, these
currents are squared and their amplitudes depends on loads reactive currents.
The section is divided into two sub-sections, a computer unit that reads continuously the load
current and determinates the respective contents of harmonic and reactive currents, and a power
section that injects the pre-determined harmonic currents with opposite sign.
The power section is made up by an impressed voltage inverter, regulated by current PWM
The PFC section main features are:
ACTIVE OPERATION:
The PFC section arranges to real harmonic and reactive situations in real time.
The arrangement to current load amplitude variation are very fast, it takes at maximum two mains
frequency cycles, so the harmonic attenuation is valid in variable load conditions too.
CORRECTION ACTIONS
The PFC section generates reactive currents to compensate the reactive power consumption, so
the power factor is always on range (cosf=0.95)
NOISE PROOF
Possible harmonic currents rejected from close users doesn’t affect the PFC section, because the
unit doesn’t read them.
Possible waveform distortions doesn’t affect the PFC sections
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
NO RESONANCE
Due to the PFC section technology it is impossible to have oscillations
NO CONSUMPTION
The absorbed active power is limited to power section loss (inverter, inductor, cables) The PFC
section generates only reactive and harmonic currents with no significative energy exchange with
AC mains
EASY DISCONNECTION
In case of failure or maintenance the PFC section can be easily disconnected by means of
its main switch, obviously without interruption for the loads
AC STABILIZER SECTION
This section stabilizes the three phases output voltage to 400Vac ±2% for an input variation of
±20%
In case of one AC section has a failure this section feeds the no break bus, in case of AC mains
failure the generator feeds the AC stabilizer section
The section is connected in parallel to AC mains. The connection is made up by injection
transformer: with this solution the stabilizer absorbs only the power needed to stabilize output
voltage, with great advantages on sizes, weight and efficiency
The parallel connection allows an easy service and maintenance, by-pass is automatic and doesn‘t
affect the loads
Output voltage regulation is made by a back-back configuration double converter.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
NETWORK FILTER
PM427
HARMONIC FILTER
-
20KW
380V 3Ø 50Hz
USED TO PUT DOWN NETWORK ARMONICS
THE UNIT ELIMINATE DIFFERENTIAL AND COMMON MODE NOISE
USED TO PREVENT NETWORK TROUBLES PROPAGATE TO THE USES
USES TO PREVENT THAT USERS NOISE PROPAGATE TO THE OTHERS
INTERNAL FAN COOLING
DIGITAL INSTRUMENTS FOR VOLTAGE – CURRENT – POWER COS Φ
AND FREQUENCY MEASURAMENTS
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
LINDY -
PM788
LAN REMOTE CONTROLLED POWER DISTRIBUTION
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
MAINTENANCE AND LOGISTICS
MESAR S.r.l. with operational centre and premises in Tivoli was born in 1998 on
the initiative of Mr Faggioni Fabrizio and professional men with many years of
experience in the field of ATC and Radar systems for military and civil application
Initially they specialized in producing Power Systems for railways vehicles and
rolling stock, then they extended, with confirmed success, their experiences in the
fields of turn key project for ATC and Airport Management Systems.
Currently MESAR S.r.l. operates, but not exclusively, in the field of the production
of Electronics products and is organized in order to develop, to plan and to
construct of any kind of high technology equipment .
MESAR S.r.l.
operates also in the field of the maintenance, upgrading,
preparation and construction of particulars used for ATC Systems and Airports for
the national and international customers as well.
MESAR S.r.l. turnkey projects satisfy the requirements of the biggest company
like SELEX Sistemi Integrati, ENAV (Italian Civil Aviation), Italian Air Force, Indian
Air Force, others Ministries of Defence in Europe and in Asia.
MESAR S.r.l. is always sensible towards the new market necessities and
constantly determined to improve its quality and technology level with a continual
and interactive partnership established with other Italian Companies and the
Customers themselves.
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
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Mesar s.r.l. Via dei Canneti,5-Pontelucano [email protected] tel. +39.0774.32.65.28 / 32.65.16
COMPANY PROFILE
MESAR S.r.l., estabilished in 1986, works in the field of the design and manufacturing of
electronic equipments, in power conversion, data transmission and integrate supply fields.
Our products find applications both in the terrestrial field, naval, avionic and railway, both
civil and military versions.
Technologies are highly innovative, they come from collaborations with research institutes,
universities and international companies.
Ing. FAGGIONI, member of the committee IEC and CENELEC for the standardization of
the products in power supply area.
Mesar is composed of experts coming from well know Companies as Contraves,
Elettronica, Mes, Selenia, Pulsar etc., with great experience in the field of the scientific
search and development.
The company is located in an industrial area of 3000m2, close to the National Road
Tiburtina, nearby Tivoli and Villa Adriana.
MESAR operates since 1997 in compliance with ISO 9001 - 2000 Certified by the
CERMET
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