SPEC INSTRUMENTATION

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INDEX- SPEC INSTRUMENTATION December 14, 2009

Filed under: control,instrumentation,thermal power plant — shivajichoudhury @ 7:22 am
Tags:
2.DISTRIBUTED DIGITAL CONTROL,MONITORING
1.DESIGN CRITERIA -INSTRUMENTATION
3.OTHER SG/TG RELATED CONTROL & INST
8.CONTROL VALVES& ACTUATORS
6.UNIT CONTROL DESK, UNIT CONTROL PANELS
5.STEAM & WATER ANALYSIS SYSTEM (SWA
4.00.00 MEASURING INSTRUMENTS (PRIMARY A
17.Control Philosophy
About
10.CONTROL AND INSTRUMENTATION CABLE
16.EPABX
13.CONTROL & INSTRUMENTATION FOR PLA
18.TESTING (INSTRUMENTATION)
15.ELECTRICAL ACTUATOR
12.PUBLIC ADDRESS SYSTEM
INSTRUMENTATION VENDERS
9.MAINTENANCE AND CALIBRATION EQUIPMENTS
14.Type Test
11.PROCESS CONNECTION , PIPING AND INSTA
7.ELECTRIC POWER SUPPLY
 

1.SPECIFICATION OF INSTRUMENTATION October 17, 2008

2.DISTRIBUTED DIGITAL CONTROL,MONITORING    
1.DESIGN CRITERIA -INSTRUMENTATION
3.OTHER SG/TG RELATED CONTROL & INST
8.CONTROL VALVES& ACTUATORS
6.UNIT CONTROL DESK, UNIT CONTROL PANELS
5.STEAM & WATER ANALYSIS SYSTEM (SWA
4.00.00 MEASURING INSTRUMENTS (PRIMARY A
17.Control Philosophy
10.CONTROL AND INSTRUMENTATION CABLE
16.EPABX
13.CONTROL & INSTRUMENTATION FOR PLA
18.TESTING (INSTRUMENTATION)
15.ELECTRICAL ACTUATOR
12.PUBLIC ADDRESS SYSTEM
INSTRUMENTATION VENDERS
9.MAINTENANCE AND CALIBRATION EQUIPMENTS
14.Type Test
11.PROCESS CONNECTION , PIPING AND INSTA
7.ELECTRIC POWER SUPPLY

 

1.00.00   DESIGN CRITERIA

 

   The Bidder shall provide Control  & Instrumentation

 

         System for control, monitoring and operation of entire

 

         Plant in all regimes of operation in safe and most

 

         Efficient manner.  The Bidder shall provide all systems,

 

         Equipment, accessories and associated equipment in a

 

         Fully operational condition acceptable to the Owner. 

 

         The  bidder shall also provide all  material,  equipment

 

         and  services which may not be  specifically  stated  in

 

         The specifications but are required for completeness of

 

         The equipments/systems furnished by the bidder and for

 

         Meeting   the   intent   and   requirements   of    this

 

         Specifications.   The work shall be   consistent with

 

         Modern power plant practices and shall be in compliance

 

         With all applicable codes, standards, guidelines and

 

         Safety requirements in force on the date of award of the

 

         contract.  The  requirements  of  statutory  authorities

 

         (e.g.  MOEF, Inspector of Factories, IBR,TAC,  CPCB/SPCB

 

         etc. with regard to various plant areas like main plant,

 

         fuel oil plant/system, chlorination plant, fire fighting

 

         system,  Emission  measurements etc.)shall  be  complied

 

         even if not actually spelt out.

 

         The   bidder  shall  provide  all  systems/   equipments

 

         described in this specification for one unit. There  are

 

         Two Units  are in the scope of bidder.

 

 

 

 

1.01.00  Reliability and Availability

 

         Each  component & system offered by the bidder shall  be

 

         of    established   reliability.  The   minimum   target

 

         reliability  of  each  piece  of  equipment  like   each

 

         electronic  module/card.  Power supply, peripheral  etc.

 

         shall  be  established by the  Bidder,  considering  its

 

         failure  rate/mean time between failure(MTBF),  meantime

 

         to  repair(MTTR),  such  that the  availability  of  the

 

         Complete C&I system is assured for 99.7% or better.

 

         Further the bidder shall ensure that all  equipment/part

 

         of  his  system, that is not listed  under  recommended

 

         spares  shall have normal life expectancy exceeding  the

 

         expected life of the plant i.e. thirty (30) years.

 

         In  order  to ensure the target reliability  the  Bidder

 

         shall  ensure  selection of  proper  materials,  control

 

         manufacturing process, use quality controlled components

 

         and  parts, take adequate design margins &  Derating  of

 

         Electronic components and parts and carry out necessary

 

         tests etc. 

 

         The bidder shall submit detailed reliability calculations

 

         for  each system/ equipment which (with the help  of  a

 

         schematic  of various sub-system connected in series  or

 

         in  parallel as the case may be and MTBF &  MTTR  values

 

         for the various equipments) shall show that availability

 

         calculation   is  as  per  IEEE  standard-  P  1046   or

 

         equivalent.  This shall be submitted by bidder along with

 

         bid.

1.01.01  When  more than one device uses the same measurement  or

 

         control  signal, the transmitter and  other  components/

 

         module  shall  be fully equipped to provide  all  signal

 

         requirements.  The system shall be arranged so that  the

 

         failure  of any monitoring device or control  components

 

         or  spurious intermediate grounding in the  signal  path

 

         shall  not  open the signal loop nor cause the  loss  or

 

         malfunction  of signal to other devices using  the  same

 

         signal.

 

1.01.02  To  ensure availability, adequate redundancy  in  system

 

         design shall be provided.  Redundancy of components  and 

 

         system  shall  be dictated by availability  criteria  in

 

         Cl.1.01.00,  to  ensure that  the   system  availability

 

         target  as  well as safety  considerations  in  critical

 

         applications are fully met.

 

         To  ensure the availability of control system,  suitable

 

         redundancy  shall  be provided at sensor  sensor  level,

 

         hardware  and  software.   For  the  protection   system

 

         independent  sensing device shall be provided to  ensure

 

         adequate safety of plant equipment.

 

1.02.00  Standardization

 

         To  ensure  smooth  and  optimal  maintenance  including

 

         efficient   spare  parts  management  of   various   C&I

 

         instruments/   equipments  like   vibration   monitoring

 

         systems,    all   4-20   mA   electronic    transmitters/

 

         transducers,   control  valves,  actuators   and   other

 

         instruments/  local devices etc. being furnished  by  the

 

         bidder  for  SG,  TG and  other  plant  auxiliaries  for

 

         similar applications, the bidder shall ensure that  they

 

         are of the same make series and family of hard wares.

        

1.03.00  Operability & Maintainability

 

     1.  The design of the control systems and related equipments

 

         shall adhere to the  principle of `Fail Safe’  operation

 

         wherever   safety  of  personnel/  plant  equipment   is

 

         involved. `Fail Safe’ operation signifies that the   loss

 

         of  signal,  loss  of  excitation  or  failure  of   any

 

         component shall not cause a hazardous condition however,

 

         at  shall also be ensured that occurrence of false  trips

 

         are avoided/ minimized.

 

         The  types of failure, which shall be taken into  account

 

         for ensuring operability of the plant shall include  but

 

         not limited to -

 

         -  Failure of sensor or transmitter

         -  Failure of controller other modules during  automatic

            operation

         -  Loss of motive power to final control element

         -  Loss of control power

         -  Loss of instrument air

 

     2.  The  choice  of hardware shall also  take  into  account

 

         sound  maintainability principles and  techniques.   The

 

         same  shall  include  but shall not be  limited  to  the

 

         following :-

 

         -  Standardization of parts

         -  Minimum use of special tools

         -  Grouping of functions

         -  Interchangeability

         -  Malfunction  identification  facility  facility/self

            surveillance facility

 

         -  Easy modular replacement

 

         -  Fool proof design providing proper identification and

            other  features  to preclude  improper  mounting  and

            installation.

         -  Appropriate  Derating of electronic  components  and

            parts

 

     3.  Equipment/  devices which require maintenance  shall  be

 

         suitably located to ensure easy accessibility.

 

     4.  The   bidder  shall  supply  all  necessary   furniture

 

         including ergonomically designed chairs & desks for  use

 

         at the room desks and various programming stations.  All

 

         the  equipment like programmers stations,  PC’s  various

 

         peripherals  & similar devices shall be   complete  with

 

         desks, stands and other mounting accessories.

 

         All  necessary furniture such as table,  desks,  chairs

 

         etc.  shall  also be furnished to set up  maintenance  &

 

         calibration equipment laboratories and the same shall be

 

         completely erected & commissioned by the bidder.

 

1.04.00  The  equipment  shall employ latest state  of  the   art

 

         technology  to guard against obsolescence. In any  case,

 

         bidder  shall  be  required to ensure  supply  of  spare

 

         parts  for lifetime of the plant.  In case, it is  felt

 

         by  the  bidder  that certain  equipment/  component  is

 

         likely to become obsolete the bidder shall clearly bring

 

         out  the same in his bid and indicate steps proposed  to

 

         deal with such obsolescence.

 

1.05.00  Colour  Shade

 

1.05.01  Colour shade of  panel/ desk and Local panel,  cabinets,

 

         LIE etc.

 

a)    External colour  – RAL  7032

      b) Interior         – Briliant White

 

1.05.02  Colour of instrument  Junction Boxes  – Sky Blue      

 

1.05.03  Colour of Electrical  Actuator        – Blue            

 

1.05.04  Colour of  instrument  cable          – Sky Blue        

 

1.06.00  Environmental Conditions

 

         Instruments,  devices  and  equipment  for  location  in

 

         outdoor/indoor conditions area shall be designed to suit

 

         the  environmental conditions indicated below and  shall

 

         suitable   for  continuous operation  in  the  operating

 

         condition of coal fired utility.

 

1.06.01  Outdoor Location

 

     a)  Temp.Range          – 0-55 Deg.C

 

     b)  Relative Humidity   – 0-100%

 

     c) Atmosphere          – Dirty air

 

 

1.06.02       Indoor Location

 

     a) Temp. Range          – 0-50 Deg.C

 

     b) Relative Humidity   – 5-95 %

 

 

1.06.03       DCS, PLC etc shall design for operation in ambient

 

         Temperature ranges 0- 50 Deg.C.

 

1.07.00 Grounding

 

         Grounding System for DDCMIS, PLC, P A System etc. shall be  prefer  as per  IEEE standard  and  separate  from  Electrical grounding.

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