ASTER HOSPITAL ON PLOT NO. 1 AT AL NAD, AL QASIMIYA, SHARJAH

FOR DR. MOOPENS HOLDING FZC

SUB-SECTION 06

STANDBY GENERATOR SYSTEM06-1SCOPEThe Contractor shall supply, install, connect and commission standby diesel generating set with all necessary switchgears, controls and accessories for supply of electric power to emergency services indicated on the drawings and/or as described in these specifications. The supply, installation, connection, commissioning and testing of the generator sets shall be in accordance with BS 5514, BS 4999, BS ISO 3046 and BS 5000, the lEE wiring regulations and the associated drawings. The design and installation shall include air inlet and outlet attenuation, louvres, filters, and accousting linings for generator room, as required, to provide a satisfactory generator installation.

All equipment supplied under this scope shall be new and shall have, in addition to normal manufacturers' warranty, an assurance of continued availability of spare parts for minimum period of 10 years.The manufacturer of the generator set shall be of international repute.06-2ALTERNATIVE OFFERIf the Contractor has some reservations as to the successful operation of the equipment by following the drawings and/or specifications, an alternate bid shall be submitted together with the requested bid highlighting such changes and justifying the reasons thereof, as may be necessary for successful operation of the plant. The general arrangement shown on the drawings and/or as described in the specifications shall be substantially maintained. The absence of any such alternative bid, shall qualify the bidder's acceptance of the drawings and or specifications. It shall be assumed that by submission of the bid, the contractor shall accept the responsibility for the successful operation of the equipment and its various parts.06-3APPLICABLE STANDARDS

General Requirements for Rotating Electrical Machines :BS 4999

Reciprocation Internal Combustion Engines Performance:BS 5514a) Fuel Oil Consumption

:BS ISO 3046-1

b) Speed Governing

:BS ISO 3046-4

c) Torsional Vibrations

:BS ISO 3046-5

d) Over speed Protection

:BS 5514 Part 6:1992

Fuel Oils for Non Marine Use

:BS 2869

Code of Practice for Safety of Machinery:BS 5304

Radio Frequency Interference Suppression:BSEN 55014

06-4QUALITY ASSURANCEProduct shall comply with relevant Codes and Standards as indicated elsewhere in this specification.

The generating set manufacturer shall preferably be the actual manufacturer of either the alternator or the generator and shall be responsible for the assembly. The generator set manufacturer shall have a reliable local representative of good repute, keeping adequate stocks of spare parts and providing efficient after sales services.06-5TESTS ON SITETests and inspection procedures shall be formulated to check the performance requirements and characteristics of the diesel generating sets.

Visual InspectionAll equipment which form part of the diesel generating plant shall be visually inspected for damage and checked against the manufacturer catalogues/drawings and schedule, for the following:-Type of generating set-Serial number-Engine details

-Alternator, exciter and AVR details-Rated speed-Rated voltage

-Number of phases-Rated frequency-Rated KVA at continuous rating-Rated KW at continuous rating-Rated KVA at service rating-Rated KW at service rating-Ancillary equipmentPreliminary Inspection CheckPreliminary inspection check shall include the following: Alignment of engine / alternator assembly on bed plate. Installation of vibration isolatorsPreliminary Running Test

Preliminary running test to check the following: Engine start and stop control Engine oil pressure Generator voltage and frequency including phase sequence Control and protection devices Leaks in oil, water and exhaust Excessive vibration Adjustments of meters and potentiometer related to generated output parameters.Load TestsThe set shall be run continuously for 8 hours test run at rated load followed by 110 percent of rated load for a period of one hour.Every 15 minutes for the first hour and every hour thereafter, the following parameters shall be recorded: All electrical output parameters associated with main alternator.

Parameters of charging alternator. Measurements of all engine parameters. Lubricating oil consumption. Cooling air medium flow

Alternator cooling air inlet and outlet temperatures. Transient Load Switching

Resistive load shall be applied and switched "ON" and "OFF" in STEPS, with the diesel generator running at rated speed and generating rated voltage.Transient recordings of maximum, minimum and nominal voltage and frequency levels together with the response times shall be obtained.Insulation TestRemove all external wiring between the plant and load bank / test panels.Isolate sensitive electronic equipment in alternator and control panel as per manufacturers recommendation.Open any neutral earthing links.Using 1000V megger check the insulation resistance: Between the load terminals and plant structure.

Between the generator terminals. Reconnect electronic equipment and neutral earth links. Functional Test

The operation of interlocks and interconnections with all external equipment and controls to be connected on site shall be simulated as part of these tests.

Controls, Alarms and ProtectionLocal controls, alarms and shutdown functions associated with the generator set installation shall be simulated and demonstrated on site. These tests shall include, but not limited to the following: High coolant temperature test. Over speed test. Low oil pressure test. Overcrank test to look after failure to start the engine after five consecutive attempts. Noise and vibration test: Shall be undertaken to ensure that the internal noise and vibration levels specified in Clause 1.7 of Section 210548 are achieved.06-6PRODUCT DATAThe Contractor shall furnish certified performance data and curves as a part of his proposal and a description of his quality control program. The Manufacturer shall ascertain that his equipment withstands the starting KW and KVA requirements of the connected load as shown on the Drawings.The Contractor shall furnish an outline drawing showing principal dimensions, space requirements, and location of connections of the equipment quoted, mainly for starting, cooling, fuel and lubricating system and ventilation requirements.The Contractor shall provide a basic tool kit, engine maintenance handbook, spare parts manual and generating set instruction handbook.The Contractor shall itemize all sight flow indications, temperature sensing devices, and pressure gauges and indications which will be furnished for local indication of critical items as recommended. If these indicators are standard with the equipment, it shall be so indicated.The Contractor shall furnish complete information, catalogues, with schematic and detailed diagrams showing all equipment furnished and shall include the control system which will describe the operation, manufacturing and type of all instruments and control items.All literature and catalogues shall be in English.06-7SHOP DRAWINGSThe Contractor shall submit for review and acceptance the shop drawings for the Generator set including all necessary civil work details, such as trenches, concrete bases, etc. generator starting characteristics and manufacturers approval for the generator's correct selection as to connected load, derating factors, etc., wiring diagrams and description of operation.A copy of these shop drawings shall also be sent to the local power authorities for approval (if needed).Any modifications to the drawings required by the Engineer or the Local Power Authorities to allow the equipment to comply with the codes, standards and specifications called for herein shall be carried out with no extra cost.06-08SPARE PARTSThe Contractor shall furnish assurance of availability of recommended spare parts for 2 years and 4 years operation (over and above the one year defect liability period achieving a total of 3 years and 5 years of extended operating maintenance) duly priced with his Tender.

The Employer/Engineer reserves the right to accept or reject the same either in full or in part and the contractor shall supply the spare parts as per the final accepted list, at the time of handing over/ taking over of the Project.

Spare parts shall be packed in suitable containers or boxes bearing labels, clearly designating the contents and the particular of equipment for which they are intended.The Contractor shall properly store and protect the spare parts until the completion of the works and deliver the same to the Client's stores.06-9WARRANTYThe Contractor shall provide the generator supplier's warranty, warranting that the equipment supplied under this specification will be new, of best quality, free from defects in design, material, workmanship and suitable for the specified operating conditions.Any defects or inadequacies discovered in the equipment during first eighteen months from date of delivery and twelve months from the date of erection/installation of equipment, whichever shall expire first, shall be made good to the satisfaction of the Engineer at the Contractors cost.

Any equipment repaired, replaced or modified shall be subject to a defect free warranty for a further period of Twelve months from the date of repair, replacement or modification.

06-10APPROVED MANUFACTURERSRefer to lists of Approved Manufacturers, Suppliers, Fabricators and Sub- contractors for Electrical Works.06-11EQUIPMENTThe equipment shall include but not be limited to the items described in these specifications.The design of the sets shall permit the easy replacement of all items subject to wear. Electrical equipment included in the emergency plant installation shall comply with the relevant clauses of these specifications, unless otherwise indicated.06-12ENGINEThe engine shall be diesel, water cooled multi-cylinder unit constructed to BS 5514 or ISO 3046. All auxiliaries necessary for operation, including turbo charging and charge air cooling equipment shall be supplied as applicable.The rating of the engine shall be capable of continuous operation as defined in BS 5514. The rating shall include both full and 110% full load for 1 hour operation.Fuel injection shall be enclosed in-line direct fuel injection type with diaphragm type fuel lift pumps. Full flow filters with replaceable elements shall be fitted and 24V fuel solenoid shall be provided.The engine shall be suitable for operation by using fuel oil to BS 2869, DIN 51 601 or as recommended by the manufacturer.The construction of the engine shall facilitate onsite maintenance and repairs including access to and removal of pistons and connecting rods. The engine and A.C. generator shall be mounted on a common, rigid bed plate supported on spring type anti-vibration mountings means for lifting and moving the set into position shall be provided.The engine speed governing system shall be in accordance with BS 5514: part 4 to meet the specified values of tolerances. Means for manual adjustments of engine speed in a range of 5 percent from the rated speed under all specified load conditions shall be provided at the control panel.An engine over speed protection device shall be provided in accordance with BS 5514: part 6 (ISO 4046/6).The engine lubrication system shall include a large capacity oil sump within the base plate of the plant. The sump shall be fitted with gear type oil pump with full flow or filters on the suction and delivery sides. A bypass pressure relief valve shall be fitted in the pump delivery. Driptrays shall be fitted to collect any spillage of oil and collecting drained oil.The lubrication system shall provide a continuous, automatic lubrication to all moving parts (without any manual intervention). The system shall also include oil cooler, crankcase breather pipe, manual lubrication facility for priming, sump drain pipe to facilitate oil drainage from the side of the skid and a dipstick.The engine coolant shall be circulated by a gear driven centrifugal pump mounted on the engine. A thermostatically controlled valve shall be provided in the cooling system to assist rapid heating of water temperature during the starting of the engine and to provide temperature control when engine is running.An electric immersion heater connected to mains supply shall be fitted to maintain the engine jacket water temperature to assist quick starting of the engine in cold environment i.e. when the ambient temperature is below 10C. The cooling system shall be closed loop type with set mounted or remote radiator with integral fan. The radiator fan shall be either directly driven from the engine or driven by an electric motor connected to generator electrical supply. The radiator fan shall be sized to accommodate the pressure drops in duct works, louvres and attenuators used in the installation of the emergency plant.The cooling system shall include all pipe works, valves, sensors, heaters, etc, to provide satisfactory operation of the diesel generator set under the specified loading and ambient conditions.

Care must be taken to see that the surface to which the generator is bolted is aligned in all direction so as to avoid bearing trouble.Engine mounted radiators shall be connected to radiator exhaust louvers, by means of a fire retardant flexible cowling connection as necessary and as applicable.06-13STARTING SYSTEMThe engine starting system shall be capable of starting and running the engine at rated cranking speed required for satisfactory ignition.Engine shall be started by means of battery operated starter motors, mounted on the engine flywheel housing. Where two starter motors are used for starting, each motor shall be capable of providing the required starting duty at the lowest specified ambient temperature. The starter motors shall be disengaged from the engine, when the engine fires or when the starting sequence is de-energized. Starter batteries shall be sealed maintenance free, lead acid type and shall have a capacity required for the above starting operation and to initiate three starting cycles.Batteries shall be located close to the engine with the leads between the batteries and the engine duly protected against physical damage.The batteries shall be easily accessible for maintenance and inspection.Constant voltage type battery charger with monitoring instrumentation shall be provided for charging the starter batteries. The battery charger shall be automatically disconnected during the engine starting.

06-14ALTERNATORThe alternator shall be brushless, salient pole and with revolving field and self-regulating alternator. The alternator shall be continuously rated in accordance with BS 5000: part 99, and shall be capable of providing 110% output for 1 hour in any 12 hour duty period.The generator shall be self-cooled by means of an integral shaft mounted fan over the ambient air temperature range specified.

Contractor should take care that the air entering the alternator is not preheated by passing over any hot body such as the engine or its exhaust system.The alternator shall be of fabricated steel construction with ball and roller bearing, dynamically balanced and with rotating field salient pole construction with heavy damper windings.

The machine shall have an A.C exciter and liberally rated silicon diode assembly with a built-in excitation system and automatic voltage regulator (AVR). It shall be screen protected, drip proof and with a large terminal box.Positive voltage build up shall be ensured by the permanent magnets in the exciter field. Constant output voltage control shall be achieved by a transistorized voltage regulator which adjusts the exciter field current to compensate for all normal variations.

AVR components shall be contained within an enclosure mounted on the alternator. The enclosure shall be isolated from any vibration forces transmitted from the generator. Where diesel generating sets are to operate in parallel, the alternator regulation characteristics shall be designed to facilitate such operation, including provision for manual adjustments of characteristics at site.Insulation to windings of the alternator shall be rated Class H as a minimum standard. All windings shall be fully impregnated for tropical climates, with high quality oil resistant varnish.Radio interference suppression of the alternator/regulator shall comply with the requirements of BSEN 55014.The voltage regulation limits shall be within percent under all conditions of load, power factor and temperature variations from cold to hot.Voltage drift shall be negligible. Total harmonic content in the line voltage waveform shall be in the range of 3 percent.06-15GENERATOR SET MOUNTINGThe generator set shall be vibrationally isolated from structure on spring type anti vibration mountings. There shall be no rigid connections between the generator set and the structure.The spring type vibration isolators shall preferably be constructed from suitably treated and finished steel or steel alloys. They shall be equipped with rubber, neoprene or glass fibre acoustic pads to prevent transmission of high frequencies.Spring type isolators shall have auxiliary dampers or adjustable snubber type restraints to prevent excessive movements as the machine speed passes through resonant frequency of the mounting system.06-16COUPLING SYSTEMThe coupling system shall be of unit construction which forms the engine and generator into one unit of exceptional strength and ensures perfect alignment.The alternator end shield and the engine flywheel housing faces shall be fully machined with spigots concentric to their shafts. The machined flanges mounted on the alternator shall be connected to the flywheel housing flange by steel bolts.A flexible rubber block coupling shall be fitted between the engine and alternator to provide the drive and absorb the transmission of shock loads. The torsional flexibility shall be designed to match the torsional characteristics of the system to prevent resonant conditions.06-17ENGINE CONTROL PANEL AND PROTECTIVE DEVICESThe engine control panel should be environmentally sealed, solid state microprocessor basend modules for engine control, A/C metering and shall include an oil pressure gauge, coolant temperature gauge, battery charge rate ammeter, run/stop/ remote selector switch, level gauges for the bulk fuel tank and engine monitoring system. The panel shall incorporate all receiving auxiliary contacts for connections of wiring to a remote start / stop control and a remote annunciator panel as described hereinafter.Engine monitoring system shall be provided with individual fault lamps to indicate low oil pressure, high coolant temperature, engine over speed and over crank. All above indicators shall simultaneously shut down the engine. A lamp test switch shall be provided to indicate status of various indicating lamps.The generating set shall include a complete engine start/stop control to start the engine on closing the relevant contact and to stop the engine on opening the contact. A cranking limiter shall be provided to open the starting circuit in approximately 45 to 90 sec if the engine is not started within that time.06-18EXHAUST SYSTEMExhaust system shall include a residential silencer including flexible exhaust fitting, properly sized and installed according to the manufacturer's recommendation. Silencer shall be mounted so that its weight is not supported by the engine. Exhaust pipe shall have sufficient size to ensure that exhaust back pressure does not exceed the maximum limitations specified by the generator set manufacturer.

The muffler and indoor exhaust piping shall be lagged to maintain a surface temperature not to exceed 65C. The insulation shall be installed so that it does not interfere with the functioning of the flexible exhaust fittings.Flexible gastight connection pieces shall be provided in the exhaust pipe line to allow for thermal expansion and to prevent vibration being transmitted from the engine.A clearance hole shall be allowed where exhaust pipe passes through to avoid overheating of the surrounding wall.06-19BASE FRAME CONSTRUCTIONThe combined engine-generator unit shall be bolted to a separate sub-frame which will be attached to a main frame through RESILIENT MOUNTINGS so providing complete protection from engine vibration for the control gear, radiator and other set mounted components. Mountings under the set will not be considered.The generator shall be mounted on spring type restrained vibration isolators having a static deflection of 50 mm under load conditions.

Air inlet and exhaust attenuators shall be fitted in builders work to reduce the transmitted noise to specified levels. The generator room shall have appropriate acoustic treatments having a minimum sound transmission loss of 45dB STG.Base frame shall have four lifting points.06-20DAILY FUEL TANK AND FUEL LIFT PUMPA daily fuel tank with sufficient fuel capacity for at least 8 hours duty on full load shall be provided, in a suitable location in the room. A dial type fuel gauge, fuel filter inlet and outlet connections, drain plug and all feed and return fuel pipe shall be fitted to the tank complete with hose for filling purposes.An electrical or manual fuel lift pump shall be supplied and installed near the daily fuel tank to lift fuel automatically or manually from the bulk storage tank (if available) to the daily storage tank. Necessary float switches to operate lift pump shall be provided.06-21AUTOMATIC TRANSFER SWITCH (ATS) SYSTEMThe Contractor shall supply, install and connect automatic transfer and bypass isolation switch(es) system with number of poles, rating, voltage and withstand ratings as shown on the drawings and as herein specified.The system shall be the product of one manufacturer and shall consist of an automatic transfer switch and a two way by-pass isolation switch.The neutral conductors shall be switched in the automatic transfer switch (ATS). The automatic transfer switch shall be provided with fully-rated overlapping neutral transfer contacts.The neutrals of the normal and emergency power sources shall be connected together only during the transfer and retransfer operation and remain connected together until power source contacts close on the source to which transfer or retransfer is being made. The overlapping neutral transfer contacts shall not overlap for time duration greater than 100 milli seconds.

The automatic transfer switch shall be housed in an enclosure having a minimum ingress protection of IP42.Mechanically Held Transfer Switch:The transfer switch unit shall be electrically operated and mechanically held. The electrical operator shall be a single solenoid mechanism, momentarily energized to minimize power consumption and heat generation.

The switch shall be positively locked and unaffected by voltage variations or momentary outages so that contact pressure is maintained at a constant value and temperature rise at the contacts is minimized for maximum reliability and operating life. The switch shall be mechanically interlocked to ensure only one of two possible positions - Normal or Emergency.All main contacts shall be of silver composition.ATS utilizing components of moulded case circuit breakers or contactors could be considered with price justification and to the approval of Local Power Authorities and acceptance of Engineer.The inspection of all contacts, linkages and moving parts shall be possible from the front of the switch without disassembly of operating linkages and without disconnection of power conductors. A manual operating handle shall be provided for maintenance purposes. The handle shall permit the operator to manually stop the contacts at any point throughout the entire travel to properly inspect and service the contacts when required.By-Pass Isolation Switch:The isolation switch shall provide manual bypass of the load to either source and permit isolation of the automatic transfer switch from both source and load power conductors. All main contacts shall be manually driven.Power interconnections shall be silver-plated copper busbar. Separate bypass and isolation handles shall be utilized to provide clear distinction between the two functions.

The by-pass handle shall provide three operating modes; by pass to normal, automatic and by pass to emergency.When the by-pass switch is at the automatic mode the bypass contacts shall be all open so they will not be subjected to fault currents.The isolation handle shall provide three operating modes; closed, test and open.

The test mode shall permit testing of the entire emergency power system including the automatic transfer switch without any interruption to the load.The open mode shall completely isolate the automatic transfer switch from all source and load power conductors.When the isolation switch is in the test or open mode, the bypass switch shall function as a manual transfer switch allowing transfer and retransfer of the load between the two available sources without the feedback of load regenerated voltage to the transfer switch.Transfer and retransfer operation shall comply with paragraph 42.7 of UL 1008. Microprocessor Control Module:The control module shall direct the operation of the transfer switch. The module's sensing and logic shall be controlled by a built-in microprocessor for maximum reliability, minimum maintenance and inherent digital communications capability.The control module shall be connected to the transfer switch by an interconnecting wiring harness. The harness shall include a keyed disconnect plug to enable the control module to be disconnected from the transfer switch for routine maintenance.The control module shall be completely enclosed with a protective cover and be mounted separately from the transfer switch unit for safety and ease of maintenance.Sensing and control logic shall be provided on plug-in printed circuit boards for maximum reliability. Interfacing relays shall be industrial control grade plug-in type with dust covers.All relays shall be identical to minimize the number of unique parts.The control panel shall meet or exceed the voltage surge withstand capacity in accordance with IEEE relevant standards, and the impulse withstand voltage test in accordance with the proposed NEMA standard ICS 1-109.Operation of the Set:The diesel generating set shall be used as "Mains Failure" set with automatic start up after a pre-set time during a power failure. Start-up signal for the generator shall be initiated in the event of;- Complete main failure in one or all phases of main supply.- Drop or increase in main voltage (adjustable from 2.5% to 10%).- Unbalance in main phase voltage of 2.5%.The generator set shall be capable of supplying various emergency and essential electric loads as a single unit.The generator set shall be suitable for operation under local climatic conditions, as specified.The emergency generating set shall be designed so that can take a sudden load of its rated output and stabilize its speed and voltage in less than 5 seconds. It shall be capable of carrying full load within 2 minutes after having been first loaded.Should the engine fail to start in 25 seconds following a power interruption, the emergency plant shall come to rest for 10 second. Two further attempts shall be automatically performed with intermediate period of rest.It shall be possible to operate the generator set manually for testing and normal operation purposes.After the restoration of normal power to above 90% of its rated value for an adjustable period of time (setting 2 to 60 minutes) the change over switch shall automatically revert to its normal operation. The emergency plant shall stop only after a cool down time (setting for 1 to 30 minutes).Control modules shall be single phase for single phase power sources and three phase for three phase power sources. A selector switch shall be included in the three phase control modules to enable temporary operation on single phase power sources.The voltage of each phase of the normal source shall be monitored, with pick-up adjustable from 85 to 100% and drop out adjustable from 75 to 98% of pick-up setting both in increments of 1%, and shall be fully field-adjustable without the use of any tools, meters or power supplies. Repetitive accuracy of settings shall be 2% or better over an operating temperature range of -20 to +70C. Settings at factory shall be 90% for pick-up and 85% for dropout.Single phase voltage sensing of the emergency source shall be provided with a pick-up adjustable from 85 to 100% and frequency sensing with pick-up adjustable from 90 to 100%. Both voltage and frequency settings shall be fully field adjustable in 1% steps increment. Repetitive accuracy of settings shall be minimum + 2% at an operating temperature range of -20C to +70C.The control module shall include four time delays that are fully field adjustable.Time delay adjustable from 0 to 6 seconds to override momentary normal source outages to delay all transfer switch and engine starting signals. Transfer to emergency time delay adjustable from 0 to 5 minutes.

Retransfer to normal time delay adjustable from 0 to 30 minutes. This time delay is automatically by passed if emergency source fails and normal source is acceptable.Unloaded running time delay for emergency engine generator cool down, adjustable from 0 to 60 minutes.10 AMPs rated contacts, 32 V DC shall be provided for low voltage engine start signal when the normal source fails. The start signal shall prevent dry cranking of the generator by requiring the generator to reach proper output, and to run from the duration of the cool down setting regardless of whether the normal sources restores before the load is transferred.A momentary type test switch shall provided to simulate a normal source failure. Terminals for remote contacts operation shall be provided.A visual position indicator shall be provided to indicate bypass isolation switch position.Pilot lights shall indicate availability of power sources and automatic transfer switch position.An instruction plate shall be provided.Auxiliary contacts shall be provided to signal the actual availability of the normal and emergency sources.Operators manual shall be furnished with each ATS providing installation and operating instructions.The Automatic transfer switch shall comply with UL 1008, NFPA70, NFPA99, NFPA110, IEEE, NEMA and IES relevant standards.

Proper factory test with a test certificate of all parameters of the ATS shall be provided prior to installation.FinishAll sheet steel used shall be zinc coated for rust protection. Sets shall be painted with an etching primer and finished with a high gloss grey paint grade 632 to BS 381C, or approved equal.06-22ALARM ANNUNCIATORAnnunciator shall be constructed of sturdy sheet steel enclosure having a removable front panel and adapter ring.Annunciator shall be a flush mounting unit. The face of the front panel shall incorporate nine lamps, an audible alarm, a toggle switch marked NORMAL and OFF, and a lamp test push-button switch. The printed circuits internal wiring, terminal block and battery voltage sensors shall be accessible on removing the front panel.Following indications, alarms and lockouts shall be included in the control panel:-Indication LampIndication Lamp

Identification Label Colour Function

-Mains available R.Y.B Indication

-Mains on loadGreenIndication

-Set on stand-byGreenIndication

-Set on manualAmberWarning Lamp

-Mains failedRedAlarm

-Set on loadGreenIndication

-Control switch offRedAlarm

-Control switch manualAmberwarning /Alarm

-Set failed to startRed (Flashing)Alarm/Lockout

-Generator overload relay trippedRedAlarm

-Earth fault relay trippedRedAlarm/Lockout

-Circuit breaker openGreen Indication

-Circuit breaker closedAmberIndication

-Circuit breaker trippedRedIndication

-High engine temperatureAmberwarning /Light

Additionally following indication lamp shall be provided to show the status of the generator set:- Low oil pressure Excessive coolant temperature Engine over speed Low fuel supply Low battery voltage High battery voltage Low jacket water temperature

Annunciator panel shall operate on DC source taken from the batteries of the generator itself.The indication lamps shall be twin long life LED type.In all cases, the re-set of lock out shall be done manually. Lamps shall continue to light until the fault is reset.Lamp test facility shall be provided to check the status of lamps.Alarm and lockout system shall not operate during normal shut down operation.06-23SCHEDULE OF REQUIREMENTSSCHEDULE NO. 1 Generator set reference: . Type of generating set operation: Prime / standby. Load data Nominal Voltage Nominal Current Frequency

Steady state voltage tolerance Maximum load step change Duration of load step change Voltage dip Frequency tolerance Location of site Altitude Air temperature range Relative humidity range Concrete foundation: isolated/non-isolated. SCHEDULE NO. 2Engine and Alternator Details (to be filled by the Sub-Contractor). Generator set reference

: Manufacturer and type No.

: Rated power/efficiency

: Rated voltage

:

Rated current

:

Rated frequency

:

Power factor

:

Overload capacity

:

Method of engine starting

:

Type of cooling

:

Type of governor and Class

:

(BS ISO 3046-4) Type of fuel

:

Fuel consumption at full load

:

Exhaust system details

:

Sound annunciator details

:

Alternator Details

:

Degree of Protection

:

Method of cooling

:

Insulation class

:

Maximum temperature rise

:

Rated ambient temperature

:

Method of excitation

:

Bearing Types

:

06-24SAFETYAll external electrical and mechanical connections shall be with flexible end connections to allow free movements of the diesel generator set on resilient mountings. All exposed mounting parts shall be fully guarded to prevent contact by personnel. Guards shall comply with BS 5304, and shall be removable for maintenance purposes.

A permanently fixed warning notice with 6 mm white lettering on a red background shall be fixed to the set in a prominent position.

The warning shall be as follows:

"THE GENERATING SET IS UNDER AUTOMATIC CONTROL AND MAY START AT ANY TIME WITHOUT WARNING".06-25GENERATOR EARTHINGGenerator shall have its neutral solidly connected to the system earth through the transfer switch. No local system earthing means shall be used as it would create a multiple earthing of the neutral which may cause stray currents. Alternatively the Sub-Sub Contractor may use a local earthing of the neutral if he uses an overlapping neutral transfer contact in the automatic transfer switch.

Generator frame shall be connected to the equipment earthing system through a separate equipment earth conductor. Additionally a local earth electrode might be required if generator is appreciably remote from the main electrical room. Neutral and frame of generator shall not be bonded except in the case of local neutral earthing as mentioned above.

The generator set earthing shall be separate from the general earthing of the building.

06-25SPARE PARTSThe Contractor shall furnish list of recommended spare parts by the manufacturer for 3 years (over and above the one year defect liability period) duly priced with his tender.

The Employer/Engineer reserves the right to accept or reject the same either in full or in part and the Contractor shall supply the spare parts as per the final approved list, at the time of handing over/taking over of the project.Spare parts shall be packed in suitable containers or boxes bearing labels, clearly designating the contents and the particular of equipment for which they are intended.The Contractor shall properly store and protect the spare parts until the completion of the works and deliver the same to the employer's stores.-- End of Sub-Section 06 --SS-06 STANDBY GENERATOR SYSTEMPage 1 of 16Issue No. 1

20/03/2013