Electrical Specification

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VOLUME-5

SPECIFICATIONS

FOR

ELECTRICAL WORKS

PROPOSED AL TADAWI HOSPITAL, AT PLOT NO 2140857, AL GARHOUD COMMUNITY/BLOCK, DUBAI

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PART B – ELECTRICAL WORKS

preparation of shop drawings and obtaining approval from the various authorities prior to execution of work. The contractor shall also be responsible for obtaining all materials and workmanship approval during execution and on completion of works including the connection of permanent power supply and KWH meter. All costs and charges required by the various authorities shall be included in the scope of work except the power connection charges which shall be paid by the client.

LV switchboards and all necessary interconnecting cabling and associated earthing systems.

Soft starters, variable frequency drives.

Motor control centre.

Submain distribution switch gear.

Sub-main distribution cabling including all cable trays, brackets and cleats.

Final sub-circuit wiring including all necessary conduit and trunking.

All general and special purpose power accessories and switchgear.

Standby Generator.

UPS System

Light fittings, switches and all connections for lighting installations.

Lightning protection system, earthing system and harmonic protection.

Central Battery Back up Emergency lighting system

Analogue addressable Fire Alarm system.

CCTV System.

SMATV System.

Voice / Data System.

Lighting Control system.

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Central Clock system.

Public Address / Background Music system.

Nurse Call System

All necessary power supplies terminating in an isolating switch located within 2 meters of the mechanical equipment/panels.

All coordination with other subtrades to supply and install power supply to the various equipment including all conduiting and ducts for the installation of the control wires by the equipment supplier.

Any cost associated with removing existing services of electrical, control system and telephone system.

1.1 The work shall comprise the whole of the labour and, unless otherwise indicated, all the materials necessary to form a complete installation and such tests, adjustments and commissioning as are prescribed in subsequent clauses and as may otherwise be required to give an effective working installation to the satisfaction of the Engineer.

2.0 GENERAL

2.1 This specification is for the Mechanical and Electrical (MEP) works. However, the Instructions to Tenderers, Form of Tender, Conditions of contract, Note on Pricing, Preliminaries Section and any Supplementary Conditions of Contract applicable to Main Contract shall be applicable to this contract also.

2.2 The term Contractor used in the MEP documents and drawings is to be considered to mean the Contractor for MEP works.

2.3 Contractor shall be responsible for proper performance of all MEP systems in accordance with relevant standards and codes and design parameters listed hereinafter.

2.4 Provide all items, articles, materials, operations, sundries, labour, supervision, guarantees, allowances for overhead and profit, etc., to achieve a fully functionable and acceptable system.

2.5 The precedence of documents and drawings shall be as determined in the Main Contract. However, consider the specifications as an integral part of the work together with the drawings. Consider any item or subject omitted from one, but mentioned or reasonably implied on the other as properly and sufficiently indicated and provide the same under the work of this division.

2.6 The Contractor is responsible for developing his own take off of materials and is to make this available as requested to the Consultant.

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3.1 Visit the site of the proposed works and obtain all information as to existing conditions and limitations and all proposed works on adjacent sites and in adjacent areas which might affect the works on this site, whether by Private Individuals or by Government Authorities or others.

3.2 Examine the documents including the Specifications and Drawings of all other Divisions before bidding and again before commencing any portion of the works.

3.3 Neither the Owner nor the Consultant will be responsible for any claim for extra work or expense resulting from the failure of the Contractor to be fully aware of Site Conditions.

4.0 PERMITS FEES AND INSPECTIONS.

4.1 Arrange for inspection of all work by the Local Authorities as and where applicable. This is to occur on an on-going basis throughout construction to avoid delays to the project. On completion of the work, present to the Consultant, for the Owner, final unconditional approval certificates of the Inspecting Authorities.

4.2 Pay fees/charges as levied by the Local Authorities for inspections, approvals, temporary services, connections, etc. at no additional cost to contract.

4.3 Before commencing any work on site, submit the shop drawings (approved by the Consultant) to the Authorities, as and where applicable, for checking and approval. Follow the progress of such drawings to permit the timely approval of them by the Authorities. Comply with any changes requested by the Authorities, but notify the Consultant immediately of any such change and obtain his approval.

5.0 CONTRACT DRAWINGS

5.1 The drawings for services works are design drawings, diagrammatic, and intended to convey the scope of work and indicate general arrangement and approximate locations of apparatus, fixtures, pipe and duct runs, etc. The drawings do not intend to indicate architectural or structural details.

These cannot be used as shop drawings. Contractor must develop own detailed shop drawings for work at site.

5.2 Do not scale drawings. Obtain accurate dimensions to structure and architectural items from drawings of those trades. Confirm by site measurement. Verify location and elevation of all services (Water, Electrical, Telephone, Sanitary, Storm Drainage, Gas, etc.,) before proceeding with the work.

5.3 Make at no extra cost, any changes or additions to materials, and/ or equipment necessary to accommodate structural conditions (pipes or ducts around beams, columns, etc.)

5.4 Alter, at no additional cost, the location of materials and/ or equipment as directed, provided that the changes are made before installation and do not necessitate additional material.

5.5 Install all ceiling mounted components (Diffusers, grilles, detectors, light fixtures, emergency lights, fire detectors, loudspeakers, camera points, etc.) in accordance with the reflected ceiling drawings which are to be prepared by the Contractor and coordinated with all

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trades. These must be submitted for approval and be approved before any work commences on site.

5.6 Leave space clear and install all work to accommodate future materials and/or equipment as indicated and/or supplied by other divisions of work of the contract. Install all pipe runs, conduit runs, cable trays, etc., to maintain maximum headroom and clearances, and to conserve space in shafts and ceiling spaces and under floors, and to provide adequate space for service and maintenance.

5.7 Confirm on the site the exact location of outlets and fixtures.

6.0 SHOP DRAWINGS, BUILDER’S WORK DRAWINGS AND MATERIAL SUBMITTALS

6.1 Within 15 days of award of Contract, submit programme of works. Alongwith the programme, submit a schedule detailing proposed submission dates for all Material Submittals, Shop drawings and Builder’s work drawings. Allow 15 days review period by the Consultant for each submission.

6.2 Contractor must obtain, from the Consultant, approvals of all materials, equipment and drawings within appropriate time to facilitate work at site, but, within 75 days latest, from the Contract award date. This period includes any required resubmissions till final approval is obtained.

6.3 Prepare drawings in conjunction with all trades concerned, showing sleeves and openings for all passages through structure and all insert sizes and locations.

6.4 Prepare composite construction drawings, fully dimensioned, of piping and equipment in tunnels, shafts, mechanical equipment rooms and areas, and all other critical locations to avoid a conflict of trades.

Base equipment drawings upon shop drawings and include but do not necessarily limit to, all details pertaining to access, cleanouts, tappings, sleeves, electrical connections, drains, location and elevation of pipes, ducts, conduits, etc., obtained from consultation with, and agreement of, all trades involved.

6.5 Prepare drawings of equipment bases, pump pits, anchors, inertia slabs, floor and roof curbs, wall openings, trenches.

6.6 Prepare all drawings to scale as agreed with the Consultant. Generally, the scale shall be 1:50 for layouts and 1:20 for Details and Sections, etc. Forward these drawings, approved by all trades concerned to the Consultant for his records. Provide copies in a number as specified elsewhere in the Contract but not less than four sets.

6.7 Drawings production and presentation is a Contractual matter and any delay in making these submissions will be considered a Contractual delay and may be subject to Contractual penalties in accordance with Contract documents.

6.8 The Consultant will only consider shop drawings bearing the stamp of the Contractor and all Subcontractors involved. Check for all pertinent information such as physical dimensions, make, performance, electrical characteristics and indicate the intended use and location before submitting these drawings. Use reference symbols or enumeration to correspond to the design drawings.

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6.9 Assume responsibility for accuracy of equipment dimensions related to space available, accessibility for maintenance and service, compliance with inspection authorities codes. Ensure that shop drawings indicate working weights of all equipment.

6.10 The submission of samples, wherever required by Consultant, will be subject to the same procedure as that of shop drawings. One set of such samples shall be required to be brought to site and kept there after approval till substantial completion.

6.11 The Consultant will mark the drawings "Approved / Approved with comments / Revise and Resubmit / Not Approved. Contractor shall resubmit accordingly.

6.12 The Consultant is not responsible for any delays caused by the inadequacy of the Contractor's drawings or his failure to obtain initial or subsequent approval. Any time taken by the Contractor to obtain approval after the originally scheduled date will be considered as a delay to the contract caused by the Contractor.

6.13 The Consultant's review shall not relieve the Contractor from responsibility for deviations from the Contract documents, unless he has, in writing, called the Consultant's attention to such deviations at the time of submission of drawings. The Consultant's approval shall not relieve the Contractor from the entire responsibility. Any approval by the Consultant shall be on the understanding that any item submitted shall be ordered with options and modifications to fully meet the specification. Any fabrication, erection, setting out or other work done in advance of receipt of stamped drawings shall be done entirely at the Contractor's risk and cost.

6.14 Furnish prints of the reviewed details to all other parties who may require them for proper coordination of their work, and furnish all information necessary for the work as a whole.

6.15 Obtain Manufacturers' installation directions to aid in the proper execution of the work. Submit two copies of such directions to the Consultant prior to installation, for use in inspecting the work.

7.0 RECORD (AS-BUILT) DRAWINGS

7.1 As the job progresses mark on one set of prints to accurately indicate the status of installed work. Have the prints available for inspection at the site at all times. 30 days before commissioning, finalise the As Built drawings and submit 2 sets as draft to the consultant for checking and approval. Upon approval, submit one set of transparencies and three sets of prints to the consultant for onward transmission to the client. Also submit a CD containing soft copies of all As Built drawings and technical details of all systems and equipments.

7.2 Show on the record drawings the installed inverts of all services entering and leaving the building and the property. Dimension underground services at key points of every run in relation to structure and building. Record all elevations for underground services in relation to floor level of the building and give reference datums to Municipal benchmarks.

8.0 OPERATION AND MAINTENANCE MANUALS

8.1 Upon successful commissioning, submit one draft of Operation and Maintenance Manuals for review and approval of Consultant.

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1. HVAC. 2. Electrical

3. Low Current Systems. 4. Fire alarm system. 5. Central battery system. 6. Plumbing and Drainage. 7. Fire and Safety.

8. Any Services other than above.

8.2 The minimum information required is as follows :

1. Catalogs highlighting the Make, Model and other necessary details for all Material and Equipment installed.

2. List of Local Agents / Suppliers for all Materials and Equipment with Telephone, Fax and Email address.

3. Detailed description of systems operation.

4. Procedures for Preventive, regular and the breakdown maintenance, with Manufacturer’s Operation and Maintenance Catalog for all Systems / Equipments. 5. Commissioning data for all Systems / Equipment.

6. List of recommended spares. (Ensure availability of the spares for at least 7 years). 7. Diagnosis of faults / remedy action guidelines.

8.3 Upon approval of the draft by the Consultant, submit 4 set of manuals to Consultants for onward submission to the Owner. Atleast one set of the manuals shall contain originals of catalogues and brochures.

9.0 TEMPORARY SERVICE.

9.1 Do not use any of the permanent service facilities during construction, unless specific written approval is obtained from the Consultant and the Owner or where specifically allowed elsewhere in the Contract Documents.

9.2 In the event that mains power is not available or is not of sufficient capacity for commissioning and testing, supply, install and operate diesel generator(s) of the correct capacity.

Any generator must have full safety features and must be maintained regularly to ensure site power at all times.

10.0 COOPERATION

10.1 Confer with all trades installing equipment which may affect the work of this division, and arrange equipment in proper relation with that equipment installed under all Divisions of the Contract.

10.2 Furnish all items to be built in by others, in time, complete with all pertinent information, commensurate with the progress of the work.

10.3 Store materials neatly and out of the way and clean up all refuse caused by the work daily.

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Before this Contractor undertakes work in any area he must prepare a list of deficiencies in that area which affect his works, or which could possibly be construed as being caused by himself if not noted. In the event that such deficiency list is not prepared, then he shall be deemed responsible for such deficiencies. Any list shall be brought to the attention of the Consultant forthwith.

12.0 SUPERVISION.

12.1 The Subcontractor will maintain at site, as necessary for the performance of the Contract, qualified personnel and supporting staff, with proven experience in erecting, testing, and adjusting projects of comparable nature and complexity.

12.2 Before commencing work the Contractor will submit details of the proposed Engineers and Supervisors, including copies of their Certificates. If in the Consultant's opinion the proposed Engineers or Supervisors are not adequately qualified or are otherwise unacceptable, the onus is on the Contractor to submit alternates until such approval is given.

12.3 Where the Contractor's staff becomes during the Contract deficient in performance, the Contractor is to remedy the situation by immediate and appropriate replacement, to Consultant’s approval.

12.4 Approval of the Contractor's Engineers or Staff shall in no way prevent the withdrawal of that approval at any time during the Contract should the Consultant so desire. In the event of such disapproval, Contractor will be required to rectify the position as stated above within 14 days.

12.5 In the event of any negligent or severely detrimental behavior the Consultant has the right to order the removal from site of any Engineer, Supervisor, or worker on a “forthwith" basis.

13.0 CLEANING.

13.1 Each day as the work proceeds and on completion, clean up and remove from the premises all rubbish, surplus material, equipment, machinery, tools, scaffolds, and other items used in the performance of the work. Clean out dirt and debris and leave the buildings broom clean with no stains and in a condition acceptable to the Consultant.

13.2 Where electrical items form part of the visible finish in the rooms, protect from over-painting, etc. and give all items a final cleaning before handing over of the project.

14.0 ACCESSIBILITY, ACCESS PANELS AND DOORS.

14.1 Any item of equipment requiring maintenance shall be located so as to be accessible for maintenance or repair without removing adjacent structures, equipment, pipings, ducts or other materials.

14.2 Install all concealed equipment requiring adjustment or maintenance in locations easily accessible through access panels or doors. Install systems and components to result in a minimum number of access panels. Indicate access panels on as-built drawings.

14.3 Provide the respective Division of work with panels, doors or frames, complete with all pertinent information for installation.

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Ensure that access doors are installed in a manner to match the building grids where applicable.

14.4 Prepare detail drawings showing location and type of all access doors in coordination with other trades before proceeding with installation and hand these to the Contractor to obtain approval.

14.5 Size all access doors to provide adequate access and commensurate with the type of structure and Architectural finish. Should it be necessary for persons to enter, provide a minimum opening of 600 x 450mm.

14.6 Ensure proper fire rating of access doors in fire separations

14.7 Lay-in type ceiling tiles, if properly marked may serve as access panels.

14.8 The access panels shall be constructed and shall have finishing to match surrounding architectural construction and finishes and shall be to engineer’s approval or as specified elsewhere in the contract documents.

15.0 CONTRACTORS RESPONSIBILITY

15.1 The appointed Contractor shall accept full functional responsibility for all electrical services to meet the requirements of the Client/Engineer and generally in accordance with this specification.

15.2 The Contractors tender submission shall include for all the necessary material, plant, equipment and systems to meet the Engineer's approval whether specifically mentioned herein or not.

The scope of work shall include, but not necessarily be limited to the following:-

(a) LV site cabling.

(b) All main and sub-main switchgear with allowance for future extension. (c) All internal LV and control cabling.

(d) All emergency and escape lighting. (e) All lighting and lighting control system (f) All Fire alarm and life safety installations. (g) All low current system installations.

(h) All telecommunication / data system installations. (i) All Security & Access control system installations. (j) Electrical services for mechanical services plant.

15.3 Design Parameters

The electrical system equipment selection and installation shall comply with the particular requirements listed hereunder:

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15.4 Site Conditions

All electrical equipment and components shall be selected and installed such as to operate satisfactorily and safely under the following climatic conditions.

Maximum shade temperature in summer 50 deg. C Direct sun temperature in summer 84 deg. C

Minimum ambient temperature in winter 2.8 deg. C Relative humidity max 100

Rusty atmosphere

15.5 System of Supply

Three phase, neutral and separate protective conductor (TT).

The system of supply shall be at 380V / 400V 3Ph, 50HZ with a maximum short circuit capacity of 50 KA for 1 second at the main bus bar of the LV Switch Board.

The electrical system shall have following system variations at the sub-station: Voltage +/- 6%

Frequency +/- 4%

16.0 HIGH VOLTAGE NETWORK

16.1 The contractor shall be responsible for all negotiations with the DEWA to ensure that supplies are available to meet the construction programme. It shall be the Contractor's responsibility to execute all civil construction work connected with the HV Distribution Network as required by DEWA. All costs associated with acquiring permanent incoming mains supply including all civil works shall be included in the contract except for the power connection charges which shall be paid by the client.

17.0 AUTHORITIES APPROVAL.

17.1 The contractor shall be responsible for liaising with DEWA, ETISALAT/DU and the Civil Defence Authority and any other authorities after obtaining the Consultant's approval, in order to :-

(a) Approve the shop Drawings, before ordering any equipment, and commencing with the installation.

(b) Approve any excavation prior to installation;

(c) Acquire main supply connection;

(d) Approve the Fire Alarm, Telephone systems etc.

18.0 REGULATIONS

The installation shall be carried out in accordance with the current edition and supplements of the following Regulations and Standards: -

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(b) It is the contractor's responsibility to ensure that the electrical work and installation meets with the requirements of the relevant authorities and there shall be no extra cost whatsoever paid by the client due to the requirement of the authorities.

(c) IEE regulations with latest amendments.

(d) All relevant BS, IEC Standards.

(f) Other appropriate regulations under statute.

(g) Requirements of BS 7671, 1992

19.0 DEFINITIONS

For the purpose of this Specification:

(1) The definitions given in the IEE Regulations for Electrical Installations apply.

(2) The words "weatherproof" and "dust protecting" shall have the meanings ascribed to them in the relevant regulations.

(3) The words "complete installation" in clause 1.1 shall mean not only the major items of plant and apparatus conveyed by the Specification, but all the incidental sundry components necessary for the complete execution of the works and for the proper operation of the installation, with their labour charges, whether or not these sundry components are mentioned in detail in the tender documents issued in connection with the contract.

20.0 PHASE IDENTIFICATION

The cable connected to phase "R" shall be in all cases coloured Red, the cables connected to phase 'Y' shall be coloured Yellow, and the cables connected to phase ‘B’ shall be coloured Blue. The neutral conductor shall in all cases be Black. Any insulated earth wires shall be coloured Green or Green/Yellow. These colours shall be continued up to the actual terminals or cable lugs.

21.0 VOLTAGE DROP

The voltage drop between the incoming LV switchboard and the extremity of any circuit shall not exceed 4% of the nominal supply voltage.

22.0 TELECOMMUNICATIONS INTERFERENCE

The whole of the electrical installation work shall be so designed that there is an absolute minimum of interference with telecommunications, and the reception of broadcasting to BS 800 or any other relevant BS.

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The armour of all cables, cable trays, trunking, ducts etc., shall be prevented from coming into contact with non-electrical services by minimum spacing of 150mm. Where this is impracticable they shall be bonded to the exposed metal of the other service through a protective conductor.

24.0 BUILDER'S WORK

To reduce the necessity for cutting away and the like, certain holes and chases will be provided in the structure by the Contractor to the Engineer's instructions.

The Contractor shall plan his work so that full advantage is taken of these provision's but it is the Contractor's sole responsibility to ensure that all holes and chases are in the required position and that any additional ducts, holes and chases necessary for the execution of his work in the in-situ concrete walls, floor slabs, columns and beams are executed in the early stage of construction of the building.

25.0 FOUNDATION BOLTS AND SUPPORTS

25.1 The Contractor shall arrange for the supply of, in advance of the delivery of the equipment, all necessary foundation bolts, nuts, plates, sleeves and anchorage’s as and when directed.

25.2 All cable trays, cable trunkings, light fittings and any other electrical components shall be installed and supported using a standard product recommended by the manufacturer, where such support is not a standard product range. The contractor shall only use galvanized material to engineer's approval as a support.

26.0 DESIGN AND STANDARDISATION

26.1 The Works shall be executed to facilitate inspection, cleaning and repairs for use where continuity of operation is the first consideration. All equipment supplied shall ensure satisfactory operation under working conditions. All plant containing rotating parts shall be capable of operating at speeds up to the maximum duty specified without vibration or excessive noise.

26.2 Corresponding parts throughout the Contract Works shall be made to gauge and shall be interchangeable wherever possible. The Contractor may be required by the Engineer to prove interchangeability by actual interchanging of the various parts.

26.3 Suitable provision by means of eyebolts or other means are to be provided to facilitate handling of all items that are too heavy or bulky for lifting and carrying by two men (70 kg).

27.0 MATERIALS, SHOP DRAWINGS AND WORKMANSHIP

27.1 The contractor shall be responsible to obtain the Consultant's approval on the detailed working drawings prior to ordering any equipment and commencing the installation.

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27.3 The contractor shall be responsible for preparing a dimensional shop drawing showing the exact location and mounting height of the different components.

27.4 The contractor shall also be responsible for preparing enlarged scale details, sections and elevations wherever requested by the Engineer.

27.5 If requested by the Engineer, the contractor shall forward coordinated shop drawings showing the exact locations of all services.

27.6 In addition to the above, the Contractor shall forward schematic diagrams for all system. The schematic diagram shall include all details requested by the Engineer.

27.7 It is a requirement of the specification that the finished appearance of the plant in public areas is of a high architectural standard and all panels, covers, trim panels, finishes and the like shall be included to provide this required appearance to the satisfaction of the Engineer.

27.8 The whole of the equipment supplied shall be of durable finish and suitable for installation in a modern building.

27.9 The Contractor shall be responsible for ensuring that the components of each system are mutually compatible and integrated to form fully efficient systems complying with the Drawings and specifications.

27.10 All materials shall be, where applicable, in accordance with the IEE, BS Regulations, UL Specifications, Factories Act and Insurance Company requirements, where such exists, unless otherwise specified or agreed by the Engineer in writing.

27.11 All articles and materials specified to conform to the Standards shall be clearly and indelibly marked and stamped with the Standard number specified and other details required by the regulations, except where marking is impracticable when the relevant advice/delivery notes shall include the Standard number with which they are to comply.

27.12 All materials and workmanship shall be to the satisfaction of the Engineer, particular attention shall be paid to a neat orderly well arranged installation, carried out in a methodical competent manner.

The contractor shall be responsible to replace all the unsatisfactory work to the engineer without any extra cost and to the standard required by the consultant. This also applies to any item which is found to be defective in service during the maintenance period or extended maintenance as appropriate.

27.13 No person shall be allowed to execute any type of work which is normally carried out by a skilled tradesman unless he is thoroughly experienced and proficient in the trade concerned. The Engineer shall have the option to require a tradesman to demonstrate his proficiency to the satisfaction of the Engineer.

28.0 SAMPLES

Whenever requested, the Contractor shall provide a sample properly labelled of all lighting fittings, switches, fittings and other like accessories described in this specification or as specified by the Engineer.

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Such samples shall be submitted to the Engineer for his approval at his offices or elsewhere as directed, with all parts left loose, so that they may be taken apart for internal inspection by hand without the necessity of using spanners, screw drivers or wrenches.

29.0 STORAGE OF PLANT AND EQUIPMENT

29.1 All plant and equipment shall be stored off the ground under weather-proof cover until ready for incorporation in the works. All electrical apparatus shall be examined and cleaned before installation. All open conduit ends shall be fitted with plastic caps or suitable protective covering to prevent the ingress of foreign matter. All drums with cables shall be protected from direct sunlight.

29.2 Protect the building and structures from damage due to carrying out the work.

29.3 Protect all electrical works from damage. Keep all equipment dry and clean at all times.

29.4 The contractor shall be responsible for and make good any damages caused directly or indirectly to any walls, floors, wood work, brickwork, finishes, services etc.

30.0 PAINTING (ELECTRICAL PLANT AND EQUIPMENT)

30.1 Where it is the usual practice of the manufacturer of items such as electric motors, switchgear, control panels, and similar equipment, to apply a high standard of protective paint work in the shop before dispatch, this will be acceptable provided any damage to paint work on the plant and equipment which occurs is made good by the Contractor to the satisfaction of the Engineer. The interiors of control panels, switchboards and switchgear, finish paint (two coats work) shall comply with the appropriate standard for enamel finish and the exteriors of such panels shall be of an British Standard colour to give a minimum reflection value of 42%.

30.2 Instruments shall be finished dull black and control handles, push buttons and similar fittings shall be chromium plated or otherwise specially finished to the approval of the Engineer.

30.3 All items of equipment installed above the intalite suspended ceiling shall be painted with a matt black finish.

31.0 LABELS

31.1 Identification labels of 'traffolite' or other approved material engraved black on white both in Arabic and English language unless otherwise agreed, with not less than 5mm 'lino' style letters shall be fixed on or adjacent to all controls, switches and distribution gear by means of at least two brass screws. Socket outlets of voltage other than 220 volt AC shall be similarly identified or engraved.

31.2 The labels shall bear the identifications shown on the drawings, such as identification, designation, function and where necessary, phase and voltage.

31.3 Each distribution board shall be complete with a chart protected by transparent plastic and fixed securely to the inside of the lid indicating details of each circuit controlled by the board. These details shall contain points of utilization served, number and size of conductors and type of wiring.

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31.4 A permanent warning labels durably marked “Earth Connection Do not Disconnect” shall be permanently fixed in a visible position near each earthing and bonding connection.

31.5 A mimic diagram shall be provided on each main, submain panel board and on each motor control centre.

32.0 INSPECTION AND TESTS AT MANUFACTURER'S WORKS

32.1 The Engineer shall have at all reasonable times access to the Contractor's premises to inspect and examine the materials and workmanship of the plant and equipment during its manufacture there, and if part of the plant and equipment is being manufactured on other premises, the Contractor shall obtain for the engineer permission to inspect as if the plant and equipment was manufactured on the Contractor's own premises. Such inspection, examination or testing, if made, shall not relieve the Contractor from any obligation under the Contract.

32.2 All work, materials and the like rejected shall be corrected or replaced as necessary at the Contractor's expense to the satisfaction of the Engineer.

32.3 Where the plant and equipment is a composite unit of several individual places manufactured in different places, it shall be assembled and tested as one complete working unit. All equipment will be tested at the maker's works to the relevant standards where applicable.

32.4 The aforementioned works tests carried out before delivery to the Site shall not in any way relieve the Contractor of completing satisfactory site tests after erection as specified.

32.5 The contractor shall give the Engineer reasonable notice, at least seven clear days in writing of the date on and the place at which any plant or equipment will be ready for testing as provided in the contract and the Engineer shall thereupon at his discretion notify the contractor of his intention either to release such part of the plant and equipment upon receipt of the works tests certificates or of his intention to inspect such part of the plant and equipment and shall then, on giving twenty-four hours notice in writing to the Contractor, attend at the place so named within seven days of the date by which the contractor has stated in his notice the said plant and equipment will be ready for testing. The Contractor shall forward to the Engineer six duly certified copies of the test readings.

32.6 Whether at the premises of the Contractor or of any of his sub-contractors, the Contractor except where otherwise specified shall provide, free of charge, such labour, materials, electricity, fuel, water, stores, apparatus and instruments as may be reasonably demanded, to carry out efficiently such tests of the plant and equipment, in accordance with the contract and shall give facilities to the Engineer to accomplish such testing.

32.7 Works tests shall also be carried out such that due consideration is given to the Site conditions under which the equipment is required to function. The test certifications shall give all details of such tests.

32.8 As and when any plant and equipment shall have passed the tests referred to in this clause the Engineer shall issue to the Contractor a notification to that effect.

32.9 The Contractor shall not pack for delivery or transport to Site any part of the plant or equipment until he has obtained from the Engineer his written approval to the release of such part for delivery after any tests required by the Engineer in terms of this clause have been completed to his satisfaction.

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32.10 In particular, inspection and test at the maker’s works will be required for standby Generator, UPS and Electrical Switchboard.

33.0 TESTING AND COMMISSIONING AT SITE

33.1 Upon completion of the installation or part of the installation, the Contractor shall carry out and be responsible for the testing and commissioning all plant, equipment and integral systems, in stages if required, to ensure that it is in proper working order and capable of performing all of its functions in accordance with the specification and to the satisfaction of the Engineer. The Contractor shall be fully responsible for all equipment until each item of plant, equipment or system or part thereof has been tested, commissioned and accepted by the Engineer.

33.2 Any equipment damaged in commissioning shall be replaced by new plant by the Contractor at his own expense and the plant, equipment or system concerned shall be re-tested and commissioned. No instruction or action of the Engineer shall relieve the Contractor of this responsibility.

33.3 All testing and commissioning shall be carried out according to the requirements of the relevant Standards and regulations as may be stated or implied in this specification. Contractor shall prepare proper standard inspections, tests and commissioning forms and submit for approval by Engineers and Clients.

33.4 The Contractor shall give to the Engineer in writing at least ten days notice of the date after which he will be ready to make the specified tests on completion of installation. Unless otherwise agreed the tests shall take place within seven days after the said date on such day or days as the Engineer shall in writing notify the Contractor. The tests shall as far as possible be carried out under normal working conditions to the satisfaction of the Engineer and shall extend over such periods as he may direct.

33.5 If in the opinion of the Engineer the tests are being unduly delayed, he may by notice in writing call upon the Contractor to make such tests within ten days from the receipt of the said notice and the Contractor shall make the said tests within the said ten days and notify the Engineer of the days on which the said tests are to be made. If the Contractor fails to make such tests within the time aforesaid the Engineer may himself proceed to make the tests. All tests so made by the Engineer shall be at the risk and expense of the Contractor.

33.6 The Contractor shall provide all skilled labour, supervision, apparatus and instruments required for commissioning and testing and within a reasonable time thereafter furnish to the Engineer six certificates of all tests performed and accepted, signed by the Engineer, the Contractor and an authorized person acting on behalf of DEWA as prescribed in the appropriate Regulations and Specifications.

33.7 If any part of the plant or equipment fails to pass the specified tests, further tests shall, if required by the Engineer, be repeated. The Contractor shall, without delay, put in hand such modifications as are necessary to meet the requirements as described in the Contract and any expense which the Employer may have incurred by reason of such further tests may be deducted from the Contract Price.

33.8 The Contractor shall include for submission of working drawings for the electrical installation to the DEWA for approval and shall allow for the procurement of the DEWA test certificate upon completion of the building following inspection of the electrical installation by DEWA.

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Acceptance shall not in any way absolve the Contractor of his responsibility for the performance of the plant or equipment after erection as a complete working system in all respects.

34.0 SYSTEM ACCEPTANCE.

34.1 The ultimate condition for system acceptance is that the Owner and Consultant have inspected the system and found it to be acceptable, and indicated this in writing.

Issuance of the final payment certificate does not necessarily indicate system acceptance, neither does release of final payment holdback in whole or in part. The Consultant's acceptance may be contingent on any or all of the following if applicable:

34.1.1 Submit original copies of letters from manufacturers of all systems indicating that their technical representatives have inspected and tested the respective systems and are satisfied with the methods of installation, connections and operation.

34.1.2 Submit "as built" drawings and operation and maintenance manuals.

34.1.3 Train owner's maintenance staff.

35.0 CORRECTION AFTER COMPLETION.

35.1 Remedy all work in accordance with the General Conditions of Contract during the Maintenance period.

35.2 Attend immediately to any and all the defects occurring during the period defined above and repair in a manner to prevent recurrence. This contractor is responsible for all work required by other trades necessary to repair the works of this section, or necessary to repair damage caused by the failure of any part of this section.

35.3 Instruct all Suppliers and Manufacturers that guarantees on equipment will commence when the completed work is accepted and not from the date the equipment is put into operation. In the event that this condition is omitted by the supplier, or if subsequent cost to the Owner is involved. Contractor shall be liable for such costs.

36.0 GUARANTEES

36.1 The Contractor will guarantee all material and workmanship for at least 12 months after preliminary take over by the Owner.

36.2 All guarantees from equipment suppliers will be vested in the Owner, regardless of whether the Contractor who supplied the equipment is still associated with the project or not.

36.3 Guarantees will be full guarantees and will include all overhead, profit, incidental charges and sundries.

36.4 Where damage is caused to any other item by any failure of the item guaranteed, then the guarantee shall also include the costs incurred in rectifying that damage.

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37.1. Maintenance is defined as the Contractual Liability to maintain the equipment in working condition, PLUS the regular checks and servicing of equipment during the maintenance period, including all the consumables and spare parts to keep the equipment in best working order.

37.2. Regular maintenance shall be as necessary, but in any event not less frequently than monthly. Breakdown calls shall be attended immediately.

37.3. Maintenance period shall be 1 year from the date of handing over for all Electrical works.

37.4 Proper / satisfactory forms of procedure and schedules of maintenance shall be preared complying with manufacturer’s recommendations. These forms shall be submitted for approval by Engineer / Client prior to starting of the maintenance period. Also, a list of contact persons / parties for attending complaints / emergency around the clock shall be submitted.

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38.0 SCHEDULE OF MANUFACTURERS

All the materials supplied under this contract shall be from one of the manufacturers listed below. No alternate Makes shall be accepted unless all the listed Makes are unavailable. Materials proposed from listed Makes also must fully comply with Detailed Specifications. Country of Origin, where listed, must be complied.

1. MDBs / SMDBs / DBs / MCCs / Changeover Panel / Isolator

SR. MAKE ENCLOSURE 1. ABB Logstrup 2. Siemens Siemens 3. Schneider Schneider

(Assembled and tested only by the above respective Authorized Local Agent)

2. Cables and Accessories Ducab Riyad Cables Oman Cables Jeddah Cables

3. Cable trays / Ladders Wiremold - UK

Wire Baskets OBO Bettermann – Germany Wibe – Sweden

Cablofil – France

4. Cable Trunking Barton Wiremold MK

OBO Bettermann

5. Heat Resistant Cable (≥ 90 ºC) Tekab Draka

Riyadh Cables Ducab

Pirelli

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6. Wiring accessories

Make White plastic Slimline metal finish MK Aspect insignia

MEM Spectra grid Ultra

Legrand Mosaic Synergy modern Clipsal Mega 2000 Gains Borough

classic Contactum Grid Flat Plate

7. GI Box Barton

Decoduct Appleby Clipsal Elektra

8. PVC conduits and Accessories Decoduct Marshall Tufflex Clipsal

9. G.I. Conduit and fittings Barton Maruchi Walsal

WM Interface

10. PVC Coated Flexible GI Conduit Kopex Adaptaflex Lappcable WM Interface

11. Fire Alarm System Simplex - USA Edwards – Canada Gent – 34000 - UK Notifier - USA Siemens – USA

12. Fire Alarm Cable Pirelli Firetuff GST Cavicell

13. Earthing system, Lightning Furse Protection System, Electronic A. N. Wallis Systems Protection, Surge Arrestors Erico

Kingsmill

14. Emergency Lighting System Prazissa - Germany GFS - Germany

Cooper CEAG – Germany Enotec - Germany

15. Capacitor Banks Comar Schneider

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ABB Nokian Capacitors 16. Isolators Moeller ABB Schneider GE Siemens

17. Structured Cables / Fibre Optic Corning – Corning - ME Nordex – Alpha Data

Avaya–Telematics / Faronics Siemon – Beta

Krone - IAL

18. PA / Music System Merlaude - France Bosch – Holland Bouyer – Germany

19. Coaxial Cables Raydex Belden Commscope Hrishman 20. CCTV System / DVMR Vicon–UK/USA Bosch – Holland Siemens – USA Bewator – UK Group 4 - USA

21. Intelligent Lighting Control System Siemens – EIB Clipsal – C – Bus ABB - EiB

F & G - EiB

22. Variable Frequency Drives / ABB Soft Starters Siemens

Allen Bradley

Moeller

Danfoss

23. Dimming System Lutron

Helvar Electrosonic Quantran

Polaron Futronics

24. Generator Dawson Keith - UK Caterpillar - USA F.G Wilson - UK

25. Cable Glands / Lugs BICC

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HAWKE CMP

26. UPS System Schneider – France Liebert – Italy Chloride – France GE – Swiss AROS - Italy

27. Access Control System ADC Technology - Singapore DSX – USA

Bewator – UK Siemens-Germany Group 4 - USA

28. Nurse Call System Dukane Intercall Ackermann Executon Simplex

29. Audio / Visual System Sony JVC Panasonic

30. Explosion proof Accessories Legrand Simplex

31. Clock System Simplex Dukane

32. Light Fittings Refer Schedule of light fittings

*--- * --- *

Note : All Fire related Materials e.g. Fire Alarm, Fire Fighting, Fire Stop Materials, Central Emergency Lighting, Fire Dampers etc., must have Local Civil Defence Deptt. approval.

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SECTION 2

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SECTION 2

ELECTRICAL ACCESSORIES- INDEX

1.0 LOCAL SWITCHES

2.0 POWER OUTLETS

3.0 FUSE CONNECTION UNITS/DP SWITCHES

4.0 GI BOXES

5.0 ACCESSORIES PLATE FINISH

6.0 MARKING AND LABELING

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1.0 LOCAL SWITCHES

1.1 The local switches shall be 20 amp. grid type one-way, two-way, intermediate or double pole as indicated on the drawings. Where more than one switch is indicated at any position multiple gang units shall be used.

1.2 Switches shall be of the quick start make, slow break type specially designed for AC circuits to BS Standards. The operation of the switch shall not depend wholly on the action of the spring. The switches shall generally be of the rocker operated type.

1.3 All switch boxes shall be supplied with adjustable steel grids and earthing terminals.

1.4 Generally, switch units shall be of the adjustable grid pattern and to be secured to the adjustable grid by means of screws. For flush mounting switches the switch-plate shall overlap all edges of the box by not less than 7mm. For surface mounting switches the switchplate shall finish flush with the edges of the switch boxes. Switches for water heaters and fan coil units shall be complete with neon indicator lights.

1.5 In Plant rooms the switch units shall be surface or flush as required.

1.6 Local switches shall be arranged in convenient positions for switching the various circuits and generally as indicated on the drawings.

1.7 The switches shall be of the same manufacture for a particular type of switch throughout the installation. All accessories in wet and damp areas shall be of the splashproof type to IP54 protection standard.

1.8 All switch boxes should be galvanised steel.

1.9 To ensure easy and correct connection of the conductors during installation, the necessary terminal shall be easily identified, grouped inline, upward facing, captive and backed out prior to the installation.

2.0 POWER OUTLETS

2.1 The switch socket outlets, shall be in accordance with BS Standard as appropriate and shall be of the three pin grounding type.

2.2 Switch socket outlets being fed from essential and UPS sources shall be separately identified with colour coded labels fixed on the plate. All rockers shall be with neon indicators.

2.3 Live contact of the socket shall be completely shuttered such that it is not possible to engage any pin of the plug into a live contact whilst any other pin of the plug is exposed.

2.4 All floor mounted socket outlets shall be fixed as part of the under floor trunking service boxes.

2.5 These outlets shall be of the same manufacturer throughout the installation.

2.6 The sockets shall have dual earth terminals as per BS 7671, 2001, Regulation 607. The sockets shall also have the facility to connect clean earth.

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3.0 FUSE CONNECTION UNITS/DP SWITCHES

3.1 These shall be of flush or surface mounting type as manufactured in compliance with BS Standard as appropriate. The fuse connection units shall incorporate integral switch, neon indicator and 13 amp fuse links. The 20A DP switches shall be with flex outlet in base and neon indication lights.

3.2 These shall be of the same manufacturer for a particular type of switch throughout the installation and shall be complete with the other accessories installed.

4.0 GI BOXES

4.1 GI boxes to be provided with brass earth terminal to facilitate earth wire connection. The boxes to have sufficient number of 20mm and 25mm knockout and shall comply with BS 4662. Boxes to have adjustable lug for proper installations of wiring accessories. Extension ring to be used along with GI boxes, in places where the box is deep inside the wall, marble or concrete.

5.0 ACCESSORIES PLATE FINISH

5.1 All the wiring accessories shall be vandal proof. The accessories plate shall have the following finishes depending on the location where it is installed and on the feeding arrangement.

Accessories shall be polished chrome type in all areas except as listed below :

- Accessories in plantrooms shall be metal clad type, and above false ceiling and inside floor service boxes shall be white polycarbonate.

- Accessories in wet areas and as indicated on drawings shall be weatherproof to IP-66.

- All external outlets shall be weatherproof to IP-66.

- Weatherproof range shall be suitable for semi recessed mounting and supplied with back boxes.

- Isolators shall be IP65 for outdoor and plantroom installations

- Isolators feeding the fire and safety equipments (such as fire pumps, lifts, smoke extract fans, basement ventilation fans, etc) shall be fire rated for 120 min.

- Accessories in Medical gas rooms and in the Oxygen tank yard shall be explosion proof type.

- All switch plates including SSOs are to be coordinated with tiling layouts by prior agreement with the Architect on site.

- All sockets within bed head units (other than patient rooms) shall be poly carbonate

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6.0 MARKING AND LABELING

All circuits for lighting and power sockets shall be labeled and marked.

A dedicated label shall be engraved at the socket front face, another label shall be provided at the back side of wiring accessory

All UPS sockets shall be provided in different color (RED)

7.0 MOUNTING HEIGHTS

Mounting heights of accessories shall be as detailed on Architectural drawings and in compliance with statutory authority requirements. Installation shall be carried out as detailed in fit-out plans. Proper co-ordination shall be ensured with relevant subtrades for installation of accessories on furniture, medical service panels and the like. All necessary containment and backboxes shall be provided to form a complete installation to the approval of the Engineer. Such containment shall include but not limited to conduits, ducts, raceways, skirting / DADO / Underfloor trunking and boxes, etc.

In General, the mounting heights shall be as follows:

Lighting Switches - 1200mm top above FLL Switch socket outlets - 450mm bottom above FLL Flex outlet A/C - near to unit

Flex Outlet Water Heater - near to Water Heater.

Kitchen equipments - as per kitchen layout drawings

Note: The 20A double pole switch shall be manufactured to BS 3676 Part 1 1989 and shall be fitted with neon indicator. The double pole switch supplied for the water heaters shall be engraved ‘Water Heater’.

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SECTION 3

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SECTION 3

STANDBY DIESEL GENERATOR INDEX

1.0 SCOPE OF WORK

2.0 CHARACTERISTICS OF GENERATOR – GENERAL

3.0 DIESEL ENGINE AND ANCILLARIES

4.0 TESTING

5.0 FUEL SYSTEM

6.0 SOUND INSULATION OF THE ROOM

7.0 EXHAUST

8.0 BATTERY

9.0 CABLES

10.0 SELECTION

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1.0 SCOPE OF WORK

The contractor shall supply , install , test and commission a prime generating set with separate fuel tank of suitable capacity to run the set for 9 hours at rated conditions.

The set shall be complete with all ancillary plant such as starting , fuel , fuel pump, fill in point, fuel piping, exhaust , cooling , control and alarm panels , circuit breaker interconnecting wiring , cabling and all other equipment required for the operation of the sets as per but not limited to this specification .

2.0 CHARACTERISTIC (general) OF THE GENERATOR SETS

Ratings

2.1 Output - 400V , 50 Hz ,1500 Rpm ,0.8 p.f., 1850 KVA 3 phase.

Ambient temperature - 50 degree centigrade .

capability ( Manufacturer’s deration curves shall be provided )

Maximum speed - 1500 Rpm

If the site rating is less than stated rating then a detailed derating chart from the manufacturer shall be provided.

The offered gensets shall be suitable for installation in closed purpose built generator room.

2.2 Standards

The equipment and components shall comply with all relevant British / ISO / IEC standard Specifications.

The machines shall be suitable for installation in an enclosed, ventilated engine room shown on the relevant drawings.

2.3 DRAWINGS

Reference Drawings :

Basement - 1 power layout and Electrical schematic diagram.

2.3.1 The drawings are for tender purposes only and are to be read in conjunction with this Specification. Any discrepancy between the drawings and the Specification and any matter which requires clarification shall be referred to the Engineer during tender period.

The Contractor shall be responsible for the preparation of detailed installation drawings for the complete works including associated builders work, and shall submit all drawings to the Engineer for approval prior to the commencement of any work.

Approval of such drawings by the Engineer does not relieve the Contractor of his responsibility to provide an installation suitable in dimension, construction, function and finish for the purpose intended.

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This Specification and the Drawings are intended to indicate generally the arrangement of apparatus required, but the Contractor will be deemed to have included in his tender anything necessary to leave the installation complete and in proper working order to the satisfaction of the Engineer whether or not such items are mentioned in the Specification or shown on the Drawings.

3.0 DIESEL ENGINE AND ANCILLARIES

3.1 Diesel engine

The diesel engine shall be 4-stroke, either normally aspirated or supercharged and after-cooled, water after-cooled, equipped with the following :

- Heavy duty air-cleaner, with service indicators - Crank case breather

- Lubricating - oil engine driven pump

- Lubricating - oil simplex filter, with replaceable elements - Lubricating - oil cooler

- Engine - driven jacket water pump - Fuel filter, with service indicators - Flexible fuel lines

- Fuel priming pump

- Dry exhaust manifold, fitting and flange - Flywheel and flywheel housing

- Governor, Electronic

- Manual and automatic shut-off - Oil pressure gauge

- Cooling water temperature gauge - Digital Tachometer

- Electric starting - 24VDC.

3.2. Air filters

Air filters shall be suitable for use in the environmental conditions which are likely to arise occasionally, with the atmosphere highly polluted by blown sand. They shall be fitted with an ‘Air filter condition’ indicator of the vacuum type which shall be fitted to the air inlet manifold.

3.3 Cooling

Thermostatically controlled bypass valves shall be fitted to the engine cooling water system to maintain cooling water at optimum temperature.

3.4 Governor

The governor shall be Electronic type. It shall control the speed within the limits laid down in the respective Standards.

3.5 Engine shut - off.

The engine shall be fitted with a mechanically operated device which will shut off the fuel supply to the engine when any of the specified alarm conditions occur. The device

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shall be fitted with one normally open and one normally closed contact which will trip and lock-out the generator circuit breaker in the event of the automatic device operating. Micro switches shall not be used in any direct current circuit nor in any inductive circuit.

3.6 Starting System

The electric starting equipment shall be so designed that :-

(a) at engine speeds in excess of the minimum firing speed it shall be impossible to complete the starting circuit and

(b) not more than three consecutive attempts to start may be made in any period of 1 minute, each starting period and the period between such consecutive attempts being automatically timed controlled by the equipment. At the failure of the third attempt the starter circuit shall be locked out pending manual re-setting.

3.7 Generator

The generator shall be of the brushless, revolving field, solid - state exciter type, single bearing construction, directly coupled to and sharing a common high bed plate with diesel engine and the radiator.

The generator shall be complete with all necessary cooling fans, excitation and voltage regulating equipment. The excitation system shall not include a commutator.

The generator shall be star connected.

The generator shall be capable of maintaining the continuous maximum rated output when operating within +/- 1% of rated voltage and at rated power factor.

The critical speed shall exceed twice the overspeed test value.

All windings shall be tropicalised and suitably impregnated to withstand the site ambient conditions.

The generator shall meet the following requirements : - IEC 34/1 standard requirements

- Class H insulation with tropicalisation and anti-abrasion - Three - phase sensing.

- Drip - proof enclosure, IP22 - Pilot shaft alignment

- 150 % over speed capability. - Less than 5 % wave form deviation - Standard paralleling capability

- Volts per Hertz, generator mounted, digital automatic voltage regulator, three phase sensing , assuring less than +/- 1% voltage regulation

- Adjustable voltage droop for parallel operation

- Adjustable voltage gain to compensate for engine speed droop and line loss. - Less than 50 Telephone Influence Factor (TIF)

- Less than 3% Total Harmonics Factor (THF)

- Radio interference suppressed to the limits specified in BS 800 The generator shall also be equipped with manual voltage control.

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3.7.1 Exciter

The core and poles of the exciter shall be made of high permeability low loss steel stamping tightly clamped and secured to minimize magnetic noise. The characteristics of the exciter shall comply fully with the operational requirements of the alternator in matching the required loading conditions. PM excited generators shall be provided.

3.7.2 Ventilation of generator and exciter.

The generator and exciter shall incorporate shaft mounted fans of sufficient capacity to provide the machine cooling effects necessary to comply with the temperature requirements of the Specification when operating in the specified ambient conditions.

3.7.3 Voltage Regulation

Continuously active, quick acting automatic excitation control equipment responsive to the generator line to line voltage and loading conditions shall be provided to maintain the alternator voltage within the prescribed limits. Equipment will be based wholly on static state devices. Variable Regulation capability regulators shall be preferred. Diode monitor and loss of excitation protection shall be provided.

The equipment shall include all selector switches, indicating instruments, rectifiers, resistors and any other auxiliary components necessary for the satisfactory opeation of the plant.

A voltage setting device capable of adjusting the required voltage in steps of 1 volt between the limits of 90% and 110% of normal voltage at any load within the rating of the machine shall be mounted on the control panel.

When the generator maximum continuous load at rated power factor is rejected, the regulator equipment shall be capable of limiting the generator momentary over voltage to a value not exceeding 125% rated voltage and shall restore the voltage to within 1% of the nominal present value within 3 seconds.

Over-voltage/undervoltage and overexcitation protection shall be provided. 3.8 Set Mountings

The diesel engine, the generator and exciter, and the radiator shall be mounted a common welded steel bedplate. Where flange mounted generators are not employed, the bedplates shall be stress relieved before machining.

Lifting points shall be provided on the bedplate.

Suitable anti-vibration mounting shall be supplied for the diesel generator unit, and all set mounted ancillary apparatus.

Flexible connections shall be provided to all exhaust, air, fuel and water piping to avoid fracture due to vibration and to minimize conduction of noise.

Any necessary foundation bolts shall be supplied under this Contract.

3.9 Safety Guards.

All moving parts shall be adequately guarded in accordance with BS 1649 and to the satisfaction of the Engineer, in order to prevent danger to personnel.

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3.10 Generator set control equipment

The control equipment is designed to start and stop the set automatically from a remote signal.

The signal will be issued by the Automatic mains failure panel as described elsewhere.

The generator set control equipment shall be set mounted and shall be based on microprocessor based system to provide maximum system flexibility

The control function shall be provided with an OFF/ MANUAL/AUTO/COOLDOWN STOP switch.

3.10.1 The following digital measuring instruments with liquid crystal display shall be fitted :

- an ammeter - 3 phase - a voltmeter - 3 phase - - a 3 position ammeter/voltmeter selector switch - a frequency meter, in Hz and rpm - an hours - run meter.

- power factor meter - Coolant Temperature

- KW (total & per phase) - KVA , KVAR , KW-Hr meter - Oil Pressure

- System Diagnostic

3.10.2 Automatic shut-down and lock-out circuits shall be fitted for :

- low oil pressure

- Over voltage/Under voltage - Low coolant level

- Over current - Reverse power

3.10.3 Indicator lamps shall be fitted, together with a lamp-test push-button for :

- low oil pressure shut down

- high water temperature shut-down - overspeed sit-down

- failure to start/overcrank - Emergency stop

- Fault shutdown/Alarm. - 2 spare external faults.

3.10.4 A manually re-set, master shut-down relay shall be provided on the control panel, so arranged that upon the occurrence of the specified fault conditions the relay shall automatically :-

(a) break the closing circuit of the circuit-breaker. (b) make the tripping circuit of the circuit-breaker. (c) stop the engine.

Electrical Specification

VOLUME-5

SPECIFICATIONS

FOR

ELECTRICAL WORKS

PART B – ELECTRICAL WORKS

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