Invitation to Tender Technical Specification for the Supply of

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					Group Code.:                TS-EL
EDMS No.:                   509483
LHC Project document No.:   LHC-AE-CI-0001


The Large Hadron Collider Project                                              IT-3328/TS/LHC




                               Invitation to Tender

                Technical Specification for
     the Supply of Containerized Diesel Generator Sets




                                             Abstract


    This Technical Specification concerns the design, manufacture, test and delivery of
    three containerized diesel generator sets for the backup electricity distribution system
    for LHC and the ATLAS experiment: one diesel generator set of power rating
    750 kVA, output voltage 400 V, one diesel generator set of power rating 900 kVA,
    output voltage 400 V and one diesel generator set of power rating 1000 kVA, output
    voltage 3.3 kV.
    Delivery is foreseen for autumn 2005.




                                         February 2005
IT-3328/TS/LHC                                                                                                                                                               i
LHC Project document No.: LHC-EA-CI-0001




                                                           Table of Contents


1.      INTRODUCTION.......................................................................................................................................... 1
1.1     Introduction to CERN....................................................................................................................................... 1
1.2     Introduction to the LHC Project ....................................................................................................................... 1
1.3     Subject of this Technical Specification............................................................................................................ 1
2.      SCOPE OF THE TENDER .......................................................................................................................... 2
2.1     Scope of the supply........................................................................................................................................... 2
2.2     Items not included in the supply....................................................................................................................... 2
3.      GENERAL CONDITIONS FOR TENDERING AND CONTRACTING.............................................. 2
3.1     Tender procedure .............................................................................................................................................. 2
  3.1.1     Pre-tender discussions ................................................................................................................................ 2
  3.1.2     Alternative solutions ................................................................................................................................... 2
  3.1.3     Preliminary programme ............................................................................................................................. 2
  3.1.4     Subcontractors ............................................................................................................................................ 2
  3.1.5     Country of origin......................................................................................................................................... 2
3.2     Contract execution ............................................................................................................................................ 2
  3.2.1     Responsibility for design, components and performance ..........................................................................2
  3.2.2     Contract follow-up ...................................................................................................................................... 2
  3.2.3     Deviations from this Technical Specification............................................................................................. 2
3.3     Factory access ................................................................................................................................................... 2
4.      TECHNICAL REQUIREMENTS ............................................................................................................... 2
4.1     General description........................................................................................................................................... 2
4.2     Materials............................................................................................................................................................ 2
4.3     Diesel engines ................................................................................................................................................... 2
4.4     Fuel supply system ........................................................................................................................................... 2
4.5     Cooling and ventilation system ........................................................................................................................ 2
4.6     Starting system.................................................................................................................................................. 2
4.7     Alternators......................................................................................................................................................... 2
4.8     Control and regulation system.......................................................................................................................... 2
4.9     Protection equipment ........................................................................................................................................ 2
4.10 Auxiliaries......................................................................................................................................................... 2
4.11 Earthing............................................................................................................................................................. 2
4.12 Container........................................................................................................................................................... 2
4.13 Performance ...................................................................................................................................................... 2
  4.13.1 Diesel engine............................................................................................................................................... 2
  4.13.2 Alternator .................................................................................................................................................... 2
  4.13.3 Regulation system ....................................................................................................................................... 2
4.14 Operational conditions...................................................................................................................................... 2
4.15 External noise ................................................................................................................................................... 2
4.16 Remote control and monitoring........................................................................................................................ 2
  4.16.1 Digital control inputs.................................................................................................................................. 2
  4.16.2 Analog control inputs.................................................................................................................................. 2
  4.16.3 Digital outputs............................................................................................................................................. 2
  4.16.4 Analog monitoring outputs ......................................................................................................................... 2
5.      INFORMATION AND DOCUMENTATION MANAGEMENT............................................................ 2
5.1     Applicable documents ...................................................................................................................................... 2
5.2     Standards........................................................................................................................................................... 2
5.3     On-site work regulations .................................................................................................................................. 2
ii                                                                                                                            IT-3328/TS/LHC
                                                                                                   LHC Project document No.: LHC-EA-CI-0001


6.    QUALITY ASSURANCE PROVISIONS................................................................................................... 2
6.1   General.............................................................................................................................................................. 2
6.2   Quality control organization............................................................................................................................. 2
6.3   Design approval................................................................................................................................................ 2
6.4   Incoming inspection ......................................................................................................................................... 2
6.5   Production control ............................................................................................................................................ 2
7.    TESTS ............................................................................................................................................................. 2
7.1   Tests to be carried out at the Contractor's premises ........................................................................................ 2
7.2   Final testing ...................................................................................................................................................... 2
7.3   Insulation tests .................................................................................................................................................. 2
7.4   Performance tests.............................................................................................................................................. 2
7.5   Records ............................................................................................................................................................. 2
8.    DELIVERY AND COMMISSIONING ...................................................................................................... 2
8.1   Provisional delivery schedule........................................................................................................................... 2
8.2   Packing and transport to CERN ....................................................................................................................... 2
9.    MAINTENANCE CONTRACT................................................................................................................... 2
10.   CERN CONTACT PERSONS ..................................................................................................................... 2




                                                Terms and Definitions
                      Term                                              Definition
                       CDD                       CERN Drawing Directory
                      EDMS                       Engineering Data Management System
                       QAP                       Quality Assurance Plan
IT-3328/TS/LHC                                                                                             1
LHC Project document No.: LHC-EA-CI-0001




1.       INTRODUCTION

1.1      Introduction to CERN
          The European Organization for Nuclear Research (CERN) is an intergovernmental
organization with 20 Member States*. It has its seat in Geneva but straddles the Swiss-French
border. Its objective is to provide for collaboration among European States in the field of high
energy particle physics research and to this end it designs, constructs and runs the necessary
particle accelerators and the associated experimental areas.
          At present more than 5000 physicists from research institutes world-wide use the
CERN installations for their experiments.

1.2      Introduction to the LHC Project
         The Large Hadron Collider (LHC) is the next accelerator being constructed on the
CERN site. The LHC machine will mainly accelerate and collide 7 TeV proton beams but
also heavier ions up to lead. It will be installed in the existing 27 km circumference tunnel,
about 100 m underground, that previously housed the Large Electron Positron Collider (LEP).
The LHC design is based on superconducting twin-aperture magnets which operate in a
superfluid helium bath at 1.9 K.

1.3      Subject of this Technical Specification
          This Technical Specification concerns the design, manufacture, test and delivery of
three containerized diesel generator sets with of power ratings from 750 kVA to 1000 kVA
and output voltages at 400 V and 3.3 kV. The units shall be container-mounted. The Tender
shall include an option for a maintenance contract with duration of 6 years.
          The successful Bidder, hereinafter called "the Contractor", shall have manufactured
several units similar to the ones covered by this specification i.e. high-reliability units for
safety systems at hospitals, nuclear power plants, airports or telecommunication authorities.
References from such installations, stating the reliability actually obtained, shall be enclosed
with the tender. An offer without these references will not be considered.
          The units shall be designed for highest reliability and fast repair. In particular, all
electronics shall be on plug-in printed circuit boards and all essential functions shall be
remotely monitored. All regulation systems shall be electronic.
          The Contractor shall have all the necessary test equipment to fully confirm the
performance as laid down in this specification.




* CERN Member States are: Austria, Belgium, Bulgaria, Czech Republic, Denmark, Finland, France, Germany,
  Greece, Hungary, Italy, The Netherlands, Norway, Poland, Portugal, Slovak Republic, Spain, Sweden,
  Switzerland and the United Kingdom.
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2.       SCOPE OF THE TENDER

2.1      Scope of the supply
         •    Design, manufacturing, factory tests and transport to the CERN site.
         •    Unloading at CERN and positioning on plinth.
         •    Complete piping system to, as well as inside, the fuel storage tanks.
         •    Any final assembly and installation work necessary on the CERN site.
         •    Complete documentation.

2.2      Items not included in the supply
         •    External switchboards, 3.3 kV or 400 V.
         •    External cabling and connections for 3.3 kV, 400 V and earth.
         •    External auxiliary cabling from the container to the adjacent building.
         •    All civil engineering works.
         •    Fuel storage tanks.


3.       GENERAL CONDITIONS FOR TENDERING AND CONTRACTING
         Please refer to the commercial documents for more complete information.
         Tenders will only be considered from firms having been selected as qualified bidders
by CERN, as a result of the Market Survey ref. MS-3328/TS/LHC. CERN reserves the right
to disqualify any bidder whose reply to this Market Survey is found to have been incorrect.

3.1      Tender procedure

3.1.1    Pre-tender discussions
        The Bidder is strongly encouraged to contact CERN and discuss details of this
Technical Specification before submitting a tender. In particular, CERN wishes to ensure that
no doubt exists as to the interpretation of this Technical Specification.

3.1.2    Alternative solutions
          If the Bidder finds that any part of this Technical Specification is difficult, or costly to
meet, he is free to propose an alternative solution, provided that the deviations from this
Technical Specification, together with the reasons and advantages, are clearly indicated in the
Tender. Such alternative solutions shall always be made in addition to a conforming bid,
which must comply fully with this Technical Specification.
          CERN reserves the right to accept or reject the proposed alternative solutions without
justification.

3.1.3    Preliminary programme
         The Bidder shall propose a preliminary design and manufacturing schedule with the
tender, based on the specified CERN provisional delivery schedule.
IT-3328/TS/LHC                                                                               3
LHC Project document No.: LHC-EA-CI-0001


3.1.4    Subcontractors
         The Bidder shall declare in his Tender any subcontractors whose services he intends
to use in the event of a Contract. Refer to the commercial documents for more details. If
awarded the Contract, the Bidder shall restrict himself both to the subcontractors and the
amount mentioned in the Tender. If, for some reason, he wants to change any subcontractor,
or the scope of subcontracted work, or the amount subcontracted, he shall obtain CERN’s
prior agreement in writing.

3.1.5    Country of origin
        Please refer to the commercial documents for specific conditions concerning the
country of origin of the equipment or services to be supplied.

3.2      Contract execution

3.2.1    Responsibility for design, components and performance
         The Contractor shall be responsible for the correct performance of all items supplied,
irrespective of whether they have been chosen by the Contractor or suggested by CERN.
CERN's approval of the design and component choice does not release the Contractor from his
responsibilities in this respect.
         CERN assumes responsibility for the performance of items and sub-systems supplied
by CERN.
         Workmanship shall be of the highest grade and conform to the best modern practice
for the manufacture of high grade machinery and electrical equipment. CERN will upon
request give examples of the minimum acceptable workmanship level.
         All work shall be performed by mechanics and electricians skilled in their various
trades.
         All welding shall be executed by experienced welders holding national qualifications.

3.2.2    Contract follow-up
3.2.2.1 Contract engineer
         The Contractor shall assign an engineer to be responsible for the technical execution
of the Contract and its follow-up throughout the duration of the Contract.
3.2.2.2 Progress report
         The Contractor shall supply, within one month of notification of the Contract, a
written programme detailing the manufacturing and testing schedules. The programme shall
include preliminary dates for inspections and tests.
         A written progress report shall be sent to CERN every month until completion of the
Contract.
3.2.2.3 Design approval and production
          The detailed design shall be submitted to CERN for approval within two months after
notification of the Contract. CERN will give its approval or refusal, in writing, within three
weeks. Component ordering and equipment manufacture shall not start without CERN’s
written prior agreement.
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3.2.3    Deviations from this Technical Specification
         If, after the Contract is placed, the Contractor discovers that he has misinterpreted this
Technical Specification, this will not be accepted as an excuse for deviation from it and the
Contractor shall deliver equipment in conformity with this Technical Specification at no extra
cost.
         During execution of the Contract, all deviations proposed by the Contractor from this
Technical Specification, the Tender, or any other subsequent contractual agreement, shall be
submitted to CERN in writing. CERN reserves the right to reject or accept such proposals
without justification.
         CERN reserves the right to modify this Technical Specification during execution of
the Contract. The consequences of such modifications shall be mutually agreed between
CERN and the Contractor.

3.3      Factory access
         CERN and its representatives shall have free access during normal working hours to
the manufacturing or assembly sites, including any subcontractor’s premises, during the
Contract period. The place of manufacture, as stated in the Tender, may only be changed after
written approval by CERN.


4.       TECHNICAL REQUIREMENTS

4.1      General description
          The units shall be mounted in a container for outdoor use.
          The diesel-generator units will be placed outside the substation for which it supplies
back-up power. The distribution switchboards, handling the power are situated inside the
substation and are not part of this Contract. For the 400 V generator sets, CERN provides a
fully remote-controlled circuit-breaker in the external switchboard for the diesel-generator
connection (ESD 102, figure 1). It is intended that this circuit-breaker shall be tripped by
signals from the protection-gear that is part of this Contract.
          Each unit shall comprise the following:
          • A weatherproof ISO standard container enclosure. A 20 inches enclosure for the
              750 kVA unit, 40 inches enclosure for the 900 kVA and the 1000 kVA units.
          • Diesel engine.
          • Fuel system.
          • Cooling and ventilation system.
          • Starting system including battery and float-charger.
          • Noise reduction system.
          • Three-phase synchronous alternator with excitation equipment.
          • Protection-gear.
          • Control and regulation systems.
          • Auxiliary power distribution.
          • Earthing circuit.
IT-3328/TS/LHC                                                                                  5
LHC Project document No.: LHC-EA-CI-0001


         All components shall normally be manufactured in the CERN member states, be in
current production and likely to be so for at least the next ten years.

4.2       Materials
         Materials used in the manufacture of the specified equipment shall be of the kind,
composition and physical properties best suited to their various purposes and in accordance
with the best engineering practices. In particular, insulating materials shall be self-
extinguishing and not release any toxic or corrosive products when subjected to fire.
         Metal surfaces shall be appropriately prepared before painting, i.e. all enclosures shall
be degreased and sand-blasted. Appropriate paints should be used on inside and outside
surfaces: primer and gloss, in total not less than 150 µ dried and hardened. The inside colour
shall be white, the outside shall be RAL 7001 (German colour standard).
         All components shall be clearly marked for identification. Terminals and auxiliary
wiring shall be colour coded according to the CERN code:
          R-phase:                  orange
          S-phase:                  green
          T-phase:                  violet
          Non-specified phase:      brown
          Neutral:                  light blue
          Earth:                    yellow-green striped
          + 48 V, + 24 V            red
          - 48 V, - 24 V            blue.
          All screws, bolts, studs, washers and nuts shall be in accordance with the metric
system.
         All wiring shall be executed in a neat manner and be enclosed in ducts or collected in
harnesses wherever appropriate.
         All wiring and cables shall have halogen- and sulphur-free insulation and sheath.
CERN can name possible suppliers on request.
         All 400/230 V wiring and terminals shall be segregated from other wiring and
terminals so as to allow connection and repair work without risk of touching 400/230 V live
parts.

4.3       Diesel engines
          The models chosen shall be suitable for the purpose and have a proven reliability
record.
        All moving parts shall be protected with covers or grilles.
        All parts shall be easily accessible and serviceable.
        The cooling water shall be electrically preheated for highest reliability.
        A thermometer shall be mounted, measuring the exhaust temperature of the
turbocharger, if such a device is employed.
        A system for pre-lubrification of the engine is an advantage and can be offered as an
option.
        The engine air intake shall be inside the container.
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                                                         LHC Project document No.: LHC-EA-CI-0001


4.4      Fuel supply system
          A flexible steel-reinforced hose and pipe system with quick-connections and any
other necessary accessories shall be provided to pump the fuel from the external fuel tanks.
CERN will only provide the plastic fuel tanks proper.
          The fuel system shall have an internal tank sufficient for 1 hour running at full load.
The tank shall be refilled with an electric feed-pump and a manual back-up pump. These feed
pumps will have to lift the fuel from external tanks 3 m below ground level.
          The internal tank shall have a visible level gauge, a level monitor controlling the
electric feed pump and an overfill protection i.e. a return line to the external storage tanks. The
internal tank shall have a drain pipe to the external fuel tank allowing drainage of the internal
tank in case of fire. The tank shall be mounted for gravity feed to the injection pump.
          The fuel feed line shall have a flowmeter for remote monitoring and a fuel filter that
can easily be examined visually.
          A manual direct emergency stop shall be provided on the fuel feed in an appropriate
position. It shall be indicated with a large red button. An extension shall be provided on the
outside of the container. A padlockable fuel valve shall be provided to facilitate safe
interventions.
          The Contractor shall equip the external storage tank with a level monitoring system.

4.5      Cooling and ventilation system
         A complete, autonomous, cooling and ventilation system shall be provided for the
unit. External cooling water will not be provided.
         The system shall be designed to cope with the local weather conditions. In particular,
the Bidder shall demonstrate how the design copes with heavy snowfall.

4.6      Starting system
         The starting system shall comprise an electric starter motor, a Ni-Cd-battery and an
appropriate battery charger.
         The system shall be calculated for at least 3 complete starting attempts without
overheating of any component, nor recharging of the battery.
         The charger shall also provide all necessary remote monitoring signals.
         Appropriate ventilation shall be provided for the battery considering all service
conditions.

4.7      Alternators
         The alternators shall be synchronous 3-phase machines of a brushless type.
         The 3.3 kV alternator may have either one or two bearings, the 400 V alternators shall
have a single bearing.
         The alternators shall be equipped with an automatic voltage regulator of solid-state
type. The output voltage shall be adjustable ± 5%.
IT-3328/TS/LHC                                                                                  7
LHC Project document No.: LHC-EA-CI-0001


4.8      Control and regulation system
         A control system shall be provided, implementing all necessary sequencing to start,
run and stop the diesel under all the foreseen operating conditions. It shall be controllable from
a manual control panel as well as from a remote control system.
         The stop sequence shall comprise an internally programmed delay for cool-down
before stopping the engine.
         An electronic regulation shall be used for the frequency control.
         An automatic electronic synchronizer shall be provided acting as soon as the
synchronizing signal is within the cowed range. The synchroniser shall send status signals to
the remote control system.
         A load sharing controller shall be provided, activated by the control input parallel
operation. Its reference level shall be manually adjustable while running and have a range
of 10-100%.
         Signalling shall be provided for all frequent anomalies. The signals shall be separated
in two groups, faults and warnings. Fault signals shall stop the unit and warning signals shall
prevent starting. All signals shall be memorized, displayed with LED's and duplicated for the
remote monitoring.
         Faults shall include as minimum:
         •   Summed electrical fault, alternator.
         •   Oil pressure too low.
         •   Water temperature too high.
         •   Overspeed.
         •   Oil temperature too high.
         Warnings shall include as minimum:
         •   Oil level low.
         •   Water level low.
         •   Internal fuel tank level too low.
         •   Internal fuel tank level too high.
         The manual control panel shall comprise as a minimum:
         •   Display of phase and line voltages.
         •   Display of phase currents.
         •   Display of cos Ø.
         •   Display of frequency 45-55 Hz.
         •   Operation time counter.
         •   Water temperature gauge.
         •   Oil pressure gauge.
         •   Start button.
         •   Stop button.
         •   Fault and warning display.
         •   Fault reset button.
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                                                         LHC Project document No.: LHC-EA-CI-0001


4.9     Protection equipment
         The Contractor shall provide all the protection equipment necessary to adequately
protect the alternator against all external and internal faults under any service condition.
         The Contractor shall study and propose solutions that guarantee selectivity with the
CERN L.V. distribution system under the different service conditions.
        The following protection functions at minimum shall be implemented:
        •    Overload, thermal image.
        •    Overcurrent.
        •    Overvoltage, undervoltage.
        •    Reverse active power.
        •    Over- and underfrequency.
        •    Earth fault.
        •    For the 3.3 kV system: excitation fault.
        If during parallel operation a fault occurs, the envisaged mode of operation is the
following:
        1.    The protection equipment issues order to trip the generator circuit-breaker.
        2.    The external control system takes the decision to separate networks or not
              depending on evolution of fault situation.
        3.    If networks are separated the generator is reconnected by the control system as
              rapidly as possible.

4.10    Auxiliaries
        An internal 400/230 V power distribution system shall be made with the following
independently protected circuits:
         •    Battery charger.
         •    Internal lighting.
         •    Ambient heating.
         •    Fuel pump.
         •    Engine water preheating.
         •    Small power outlets.
         Protection shall be with circuit-breakers. Auxiliary power will be externally provided,
one 3-phase circuit for auxiliaries and 1-single phase circuit for an emergency light. The
corresponding standardized CEE 17 connectors for the outside connections shall be included.
         Auxiliary power is not available during a mains failure until the generator-set is
running.

4.11    Earthing
        An earthing system shall be provided in which all important components are
individually connected to a common earthing busbar. The busbar shall be connected to the
CERN earthing system with a 120 mm2 Cu-cable brought out of the container close to the
power connections.
IT-3328/TS/LHC                                                                                  9
LHC Project document No.: LHC-EA-CI-0001


         The neutral terminal of the alternator shall be connected separately to the earth
busbar. If necessary for protection reasons, a contactor shall be included.
         All parts of the earthing circuits shall be in copper. The cross-sections shall be chosen
conservatively.

4.12     Container
          The maximum dimensions are in principle those of standard containers 20’ and 40’. If
the Bidder proposes to mount equipment in such a way that the overall dimensions change, he
shall seek prior approval from CERN as there are space restrictions.
          The floor shall have an appropriate non-skid surface for operator safety.
          Sufficient space shall be provided inside the container around engine and alternator to
facilitate routine maintenance and most repairs.
          A collector device under the engine shall receive any leaking fluids.
          Gasket doors shall be provided for easy access and for any removal of equipment.
          Two lockable flaps, with gaskets and insulated bulkhead-seal shall be provided: one
for power cables and one for control cables and auxiliary power.
          Space shall be provided for two fire extinguishers (supplied by CERN) with easy
access, one at each door.
          All lock cylinders shall be of type KABASTAR1. The identification number will be
given to the Contractor.
          Electric radiators with thermostats shall be provided for ambient heating to +15°C.
          A tool kit shall be provided for each unit with all special tools necessary for the
maintenance.
          The 40’ containers housing the 900 kVA and 1000 kVA units shall be installed
together with a third container. The layout is shown in Fig. 5, indicating possible use of the
third container.

4.13     Performance

4.13.1   Diesel engine
         Shaft speed                                  1500 rpm

4.13.2   Alternator
         Power ratings are continuous power

         750 kVA, 400V type
         Rated voltage                                 400 V
         Rated active power                            600 kW
         Rated apparent power (cos ∅ = 0.8)            750 kVA



1
    BAUER SA - CH-8260 WETZIKON - Tel. 01/931.61.11
10                                                                                 IT-3328/TS/LHC
                                                        LHC Project document No.: LHC-EA-CI-0001


         900 kVA, 400 V type
         Rated voltage                                400 V
         Rated active power                           720 kW
         Rated apparent power (cos ∅ = 0.8)           900 kVA

         1000 kVA, 3.3 kV type
         Rated voltage                                3.3 kV
         Rated active power                           800 kW
         Rated apparent power (cos ∅ = 0.8)           1000 kVA

         Rated frequency                             50 Hz
         Max sub-transient reactance                 12%
         Max transient reactance                     20%
         Vector group                                YN
         Total distortion in output voltage
         under worst case conditions                 < 2%

4.13.3   Regulation system
         Frequency tolerance        Dynamic          < 5%      ∆P = 35%
                                    Static           < 1%
         Voltage tolerance                           < 2%

4.14     Operational conditions
         The unit will be positioned outdoors at an altitude of 600 m above sea level.
         The ambient air temperature conditions are:
                              Outdoor                Indoor
         Maximum             + 40° C Maximum         + 40° C
         Minimum             - 25° C Minimum         - 5° C
          The unit will be exposed to direct sunlight. For cooling design purposes a heat influx
of up to 1 kW/m2 shall be used.
          The unit will be positioned on a concrete foundation supplied by CERN. The main
fuel storage tanks, supplied by CERN, are located underground inside this foundation.
          The external control and signalling voltage is 48 V DC, +l0/-20%.
          The operating voltage of the auxiliary supply is 3 x 400 V +10/-15%.
          The unit will normally not be operating but shall permanently be ready for service. It
will be required to operate in case of mains failure or certain other fault conditions. It is
estimated that the unit will run less than 200 hours per year and start less than 50 times per
year.
          The unit may work on an isolated network as well as in parallel with the mains.
Commutation back to normal operation will always be done with re-synchronizing. The test
runs will be done in parallel with the mains.
IT-3328/TS/LHC                                                                                 11
LHC Project document No.: LHC-EA-CI-0001


         For the 750 kVA unit, the load comprises 60-70% asynchronous motors and 20-30%
thyristor-controlled equipment or rectifiers. The remainder is mainly lighting equipment. The
motors may have up to 80 kVA unit power.
         The unit shall be ready to accept 50% of the load after 10 seconds and 100% after
20 seconds.
         The load on the 900 kVA unit consists of multiple small users.
         The load on the 1000 kVA unit consists of identical resistor unit, sequentially
energised.
         The neutral of the alternator shall be directly earthed except during parallel operation.
         The fuel used for the diesel engines shall be extra light heating oil.

4.15       External noise
         Sound level ≤ 75 dBA at 1 m.
         CERN attaches great importance to the low noise level produced by the equipment. In
consequence the Contractor shall guarantee that the A-weighted sound level does not exceed
the value specified. If the noise level exceeds this value the unit is rejected.
         The unit shall be subjected to a complete sound level measurement. A record shall be
supplied to CERN.
         The sound level shall be measured with all auxiliaries operating.

4.16       Remote control and monitoring
          The diesel generator set will be fully remote controlled from an external SCADA
system. This system will also perform all the monitoring necessary to obtain the required high
reliability.
          All digital signals shall be transmitted via galvanically isolated relay contacts.
          The connectors shall be AMPHENOL C146E or equivalent.

4.16.1     Digital control inputs
           START command is given by an external contact closure of 200-1000 ms duration.
           STOP command is given by an external contact closure of 200-1000 ms duration.
           EMERGENCY STOP command is given by opening a normally closed external
circuit.
         RESET command is given by an external contact closure of 200-1000 ms duration.
         PARALLEL OPERATION command is given by an external contact closure for the
duration of said operation.

4.16.2     Analog control inputs
        A 3-phase 400 V signal will be provided for the synchronizing voltage. This input
will be connected to the appropriate source by the external control system. The unit shall
automatically synchronize when the proper voltage is present.
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4.16.3   Digital outputs
          All status signals are signalled by a contact closure to STATUS COMMON.
          STARTING status shall be indicated from the reception of the START command,
until the unit can accept load.
          RUNNING status shall be indicated from the moment the unit can accept load, until a
STOP command is received or a fault or emergency stop occurs.
          COOLING DOWN status shall be indicated from the moment the unit receives a
STOP command until the internally programmed delay has run out and the engine stopped.
          STAND-BY status shall be indicated at all other times if no fault is detected and the
unit is ready for start.
          SYNCHRONIZED status shall be indicated when the alternator output voltage is in
synchronism with the voltage at the synchronizing input.
          SYNCH SIGNAL OK shall be indicated when the external synchronizing signal is
inside range.
          All fault and warning signals, together with a summary fault and summary warning,
shall be signalled by contacts opening on fault (or warning).

4.16.4   Analog monitoring outputs
         Approval should be sought from CERN as to the type of analog signal transmission
used to the external microcomputer system. Examples of acceptable signals are 4-wire Pt100
and pulse train from V/f-converter.
         The following analog quantities shall be monitored permanently and transmitted as
analog electric signals:
         •   Container ambient temperature.
         •   Engine water temperature.
         •   Engine oil temperature.
         •   Engine oil pressure.
         •   Starting-battery voltage.
         •   Battery-charger current.
         •   Shaft speed.
         •   External fuel tank level.
        A means shall be provided to detect abnormal engine conditions e.g. cylinder
temperature, exhaust temperature or fuel flow. The corresponding analog electric signal shall
be remotely available.


5.       INFORMATION AND DOCUMENTATION MANAGEMENT
         A complete documentation per type of generator set shall be submitted to CERN.
         A complete set includes: mechanical drawings and electrical circuit and wiring
diagrams.
         A complete parts list in two copies shall be provided, including details and
specifications of all components, manufacturer, type number, etc.
IT-3328/TS/LHC                                                                                13
LHC Project document No.: LHC-EA-CI-0001


         Marking of components on the drawings shall correspond with those on the
equipment. All wiring coding shall appear on the diagrams such that it is easy to follow the
circuit on the drawing as well as in the equipment. The drawings must be neat and to a good
professional standard.
         The mechanical drawings shall be executed with all dimensions marked according to
the metric system.
         An instruction manual shall be created for the equipment in English or French and be
supplied with the unit. It shall contain a complete description of the equipment and, in
particular, its theory of operation. It shall further detail fault finding, test procedures and
recommended regular maintenance. A total of 3 manuals per type of generator set shall be
delivered.

5.1      Applicable documents
        Please refer to the cover letter or Instructions to Bidders for the complete list of
enclosed documents which form part of this Invitation to Tender.
        Please note that the quality assurance documents, CERN standards and Purchasing
documents referred to in this Technical Specification are on the enclosed CD-Rom entitled
"CERN Official Documents".

5.2      Standards
         The equipment shall in all respects comply with the relevant ISO and IEC standards
         All drawings delivered shall comply with ISO and IEC drawing recommendations, in
particular with regard to symbols and component designations.

5.3      On-site work regulations
        If work is to be carried out on the CERN site, attention is drawn to the fact that
CERN has specific rules concerning e.g. safety regulations applicable to works of Contractors
at CERN, access to and activities on the CERN site, occupational health and safety on the
Organization's site and special health and safety matters.


6.       QUALITY ASSURANCE PROVISIONS

6.1      General
         CERN requires a very high reliability from this equipment due to its function of
protecting personnel as well as complex equipment of high value. The Bidder shall
demonstrate that his design aims at the required reliability and that the quality control is of a
sufficient level.

6.2      Quality control organization
         The quality control shall be independent from the production department. It shall not
use the same personnel.
         Quality control shall be exercised at four levels: design approval, incoming
inspection, production control and final testing.
14                                                                                 IT-3328/TS/LHC
                                                        LHC Project document No.: LHC-EA-CI-0001


6.3      Design approval
       The complete design, including important design calculations, shall be submitted to
CERN for approval.

6.4      Incoming inspection
         All components shall undergo an incoming inspection, visual as well as functional,
with registered rejection rates.

6.5      Production control
         In-house manufactured components and sub-assemblies shall be inspected and tested
by the quality control department. Records shall be kept.


7.       TESTS

7.1      Tests to be carried out at the Contractor's premises
         CERN reserves the right to be present, or to be represented by an organization of its
choice, to witness any tests carried out at the Contractor's or his subcontractors' premises. The
Contractor shall give at least 10 working days notice of the proposed date of any such tests.

7.2      Final testing
        The final product shall be fully tested by the quality control. A burn-in or accelerated
ageing procedure shall be employed to eliminate weak components.

7.3      Insulation tests
        All electrical circuits shall be insulation tested to earth (chassis) and to each other
with 2 kV, 50 Hz for 1 min.
        The insulation resistance to earth and between circuits shall be at least 50 MΩ.
        The alternator shall be tested according to IEC 34.

7.4      Performance tests
         Tests shall be executed according to ISO 3046 and IEC 34.

7.5      Records
       A test record shall be established for each equipment with the individual test results.
Two copies of this record shall be delivered with the equipment.


8.       DELIVERY AND COMMISSIONING

8.1      Provisional delivery schedule
         The delivery dates are laid down in the Tender Form.
IT-3328/TS/LHC                                                                                  15
LHC Project document No.: LHC-EA-CI-0001


8.2       Packing and transport to CERN
         The Contractor is responsible for the packing and, where included, the transport to
CERN. He shall ensure that the equipment is delivered to CERN without damage and any
possible deterioration in performance due to transport conditions.


9.        MAINTENANCE CONTRACT
          The Bidder shall, as an option, offer a maintenance contract, the conditions of which
shall respect the following paragraphs.
          The starting date shall be at the provisional acceptance of the first unit and the
Contract shall be valid up to 6 years from the provisional acceptance of the last unit.
Thereafter the Contract shall be renewable each year.
          The price shall be based on a yearly running of less than 200 hours.
          CERN will execute a periodic test run with 75% load for 1 hour every 2 weeks,
unless otherwise agreed.
          CERN will make a brief visual inspection at least once every 4 weeks. The inspection
points shall be prescribed by the Contractor.
          The Contractor shall guarantee a starting and running reliability of at least 99%. A
starting attempt is defined as failed, if after 3 cranking periods the engine is not running. A run
is failed if the engine stops before stop order is given.
          The Contract shall cover all costs and spare parts for the contractually fixed periodic
interventions as well as any necessary non-scheduled intervention.
          The Contractor shall guarantee intervention on site within 48 hours of CERN's notice
by fax or telephone, holidays included.


10.       CERN CONTACT PERSONS
          Persons to be contacted for technical matters:

     Name/Department/Group                    Tel-Fax                             Email

J. GASCON                         Tel: +41.22.767.29.78              Jose.Gascon@cern.ch
                                  Fax: +41.22.767.56.00
In case of absence:

J. PEDERSEN                       Tel: +41.22.767.54.68              John.Pedersen@cern.ch
                                  Fax: +41.22.767.56.00
16                                                                                  IT-3328/TS/LHC
                                                         LHC Project document No.: LHC-EA-CI-0001




          Persons to be contacted for commercial matters:

     Name/Department/Group                   Tel-Fax                             Email

J. PAJUNEN                       Tel: +41.22.767.20.25              Jyri.Pajunen@cern.ch
                                 Fax: +41.22.767.75.45
In case of absence:
                                 Tel: +41.22.767.30.92              Sebastien.Sonnerat@cern.ch
S. SONNERAT
                                 Fax: +41.22.767.75.45
IT-3328/TS/LHC                                                     17
LHC Project document No.: LHC-EA-CI-0001




Annex A:       List of Drawings
1. Safety network principle point 5         LHCEM--0002-3
2. Container site layout for combined 900 kVA and 1000 kVA plant


Annex B:       CD-Rom "CERN Official Documents"