Fire Alarm & Detection kahra maa substations

Contract No.EZ-GCC-04/2010 Doc No.EZD-04-10-76-P001 ...

Feeding EZDAN and International Housing Group Project in Wukhair AreaCOMMON SUBSTATIONS

Fire Alarm Detection &Fire Fighting Design Philosophy

FEEDING EZDAN AND INTERNATIONAL HOUSING GROUPPROJECT IN WUKHAIR AREA

COMMON SUBSTATIONS

DESIGN PHILOSOPHY FORFIRE ALARM DETECTION & FIRE FIGHTING SERVICES

TABLE OF CONTENTS

INDEX SHEET 2

I. FIRE ALARM DETECTION SySTEM 3

II. FIRE FIGHTING SYSTEM 5

III. PASSIVE FIRE PROTECTION 5

IV. DESIGN PARAMETERS 6

V. CO-ORDINATION WITH OTHER SERViCES 6

VI. INTERFACE WITH OTHER SERVICES 7

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Q.E.A. Page 2Sheet. 2

EZD-04-10-76-P001

Contract No.EZ-GCC-04/2010 Doc No.EZD-04-10-76-P001



DESIGN PHILOSOPHY FOR FIRE ALARM DETECTION & FIRE FIGHTING SERVICES

I. FIRE ALARM DETECTION SYSTEM

The Fire Alarm and Detection System for the Substation Building and Guard Room shallcomprise the following:

i. Fire Alarm Control Panel

ii. Fire Detection installed in all Station rooms

iii. Manual Pull Stations (double action)

iv. Sounders

v. Flashers

vi. Repeater panel in the Guard room

vii. Interface units for fire suppression system FM 200 (by others), water spray system fortransformers (by others) and for fire water tank.

viii. Interface units for fire pump equipment

Fire alarm devices at the Guard Room and Pump Room are linked directly to the main firealarm control panel located at C & R room and no separate panel shall be provided beingvery small rooms. Guard room shall be linked to the main fire alarm control panel throughfire alarm junction box and fire alarm repeater panel shall be located in Guard room.

1. Fire Alarm Control Panel

The fire alarm control panel shall be located at Control and Relay room with alarmand fault indication. An analogue addressable system fire alarm control panel shallbe used complete with battery / charger units.

All the control wiring system shall be fire resistant cables in GI conduits.

2. Fire Detectors

• Smoke Fire Alarm Detectors shall be provided in all station rooms covering anarea of approximately 80 m2

.

• Explosion proof heat detectors and explosion proof manual call points shall beprovided inside the Battery room.

• For areas under flat ceiling, the maximum horizontal distance between anypoint and nearest smoke detector is not more than 7.5 meters and 5.3 metersfor the heat detectors.

• Smoke detectors shall be placed between panels, battery rack andequipment to allow for easy maintenance.

• Areas that are low fire risk such as toilet and emergency escape staircase,smoke detectors shall not be provided where it might be subject to false alarm.

Sheet. 3

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• Combined fixed temperature and rate of rise detectors shall be provided in thesubstation rooms with 11°C. above the maximum expected ambienttemperature at the ceiling and rate of rise of temperature shall be 8° C.lminute.

• Fire detectors shall be provided in the following rooms:

• 11 kV Switchgear room

• Pantry

• Fire pump room

• Battery room

• Store room

• Guard room

• Cable basement

• Beam detectors shall be provided in 66 kV and 220 kV GIS building.

• Fire alarm detectors at LV AC/DC, Telecommunication room and Control andRelay rooms shall be part of the Clean Agent System (provided by others).

3. Manual Pull Stations (Double action)

• Manual Pull Stations shall be provided throughout the building and can be sitedwithin 1.5 m of the exit points and along the escape routes.

• Manual Pull Stations shall be provided in the Cable Basement inco-ordination with the escape routes.

• Manual Pull Stations shall be located throughout the protection area so thatthey are unobstructed and accessible.

4. Fire Alarm Sounder

• Fire Alarm Bells sounder shall be provided throughout the Substation buildingto provide a minimum of 65 dBA at any location.

• Sound audibility calculation shall be provided in design stage to comply with theproject technical specifications.

5. Fire Alarm Flasher

• An outside warning flasher shall be installed and shall activate simultaneouslywith alarm bell. Flash shall be read and visible enough to be noticed evenduring day time for quick identification by Civil Defence force. The equipmentshall have a diameter not less than 100 mm and installed on a two meter poleabove the highest building of the substation.

• 2 No. flashers shall be provided for 66 kV substations and 4 No. flashers shallbe provided for 220 kV substations.

• Fire alarm cabling shall be carried out using fire resistant cables in GIconduits.

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II. FIRE FIGHTING SYSTEM

1. Portable Fire Extinguishers


• All substation rooms shall be provided with portable fire extinguishers.

• CO2 portable fire extinguishers of 6 kg capacity shall be provided in all rooms ofthe substation building, wall mounted. The top of the fire extinguisher shall notbe more than 1.5 meters.

• One wheeled mobile foam extinguisher of 100 litre shall be provided in thetransformer yard in a shelter.

• 50 kg wheeled mobile DCP extinguishers shall be provided in the GIS and11 kV SWGR rooms.

• All wall mounted portable fire extinguishers shall be provided with a maximumtravel distance of 15 m in accordance with Project Technical Specification.

• 5 kg ABC dry powder portable type fire extinguishers shall be provided at eachof the transformer and reactor rooms.

• Portable extinguishers installed outside the building shall be provided inweather proof steel cabinets, painted red.

• The minimum number of fire extinguishers shall be provided in accordance withproject technical specifications, section 3.3.15.1, pages 36 & 37 of 48 and notto be less than as shown below:

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Control roomOil tank roomTelecommunication roomLV AC/DC room11 kV Switchgear room66 kV GIS room220 kV GIS roomBattery roomStore roomPantry roomTransformer yardHVAC yardSpare extinguisher

3 No.2 No.1 No.3 No.3 No.4 No.4 No.1 No.1 No.1 No.1 No. (for each yard)1 No. (for each yard)1 No.

• Modular automatic dry powder type fire extinguishers for station I earthingtransformers (design density 2 kg/m 2

).

2. Fire Suppression System

• Fire Suppression System (with clean agent) shall be provided in Control andRelay room, Telecom room and LV AC/DC room only (by others). The systemshall be integrated and programmed through interface units connected to firealarm system.

3. Deluge Water Spray System

Sheet. 5

• Deluge Water Spray System shall be provided (by others) for the transformersin the open area. The system shall be integrated and programmed throughinterface units connected to the fire alarm system.

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III. PASSIVE FIRE PROTECTION


• Fire sealant work shall be carried out where cables enter the building, ducts andtrenches sealed with fire and water resistant material. Also all fire zones, sleevesshall be sealed with fire resistance materials.

• Basement cable coating shall be by main Contractor with Consultant's approvedcoating material.

IV. DESIGN PARAMETERS

• The Fire Alarm Detection and Fire Fighting System design shall be carried out basedon the following:

a. Project Technical Specification Section 3.3.15.1

b. QCS

c. Relevant NFPA codes and standards.

d. Kahra-maa HSE Manuals

V. CO-ORDINATION WITH OTHER SERVICES

• The Fire Alarm Detection and Fire Fighting equipment shall be co-ordinated with thefollowing:

a. Automatic detectors should not be sited within 1 m of air-conditioning supply orextract grilles

b. Location of equipment and panels

c. Slab opening

d. Down stand beams

e. Cable trays and escape route arrangement in basements, where fireextinguishers, manual call points and fire alarm bells shall be located near theescape routes. Also, all fire extinguishers shall be coordinated with emergencylighting arrangement.

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VI. INTERFACE WITH OTHER SERVICES


• The Fire Alarm System shall be interfaced with the A.C. equipment where, in case offire, the fire alarm control panel shall generate commands to shut-off relevantventilation and air-conditioning systems under certain conditions.

• Smoke duct detector shall be installed in return air duct for HVAC and in main extractduct in basement from the 66 kV GIS to cut off the power supply to package unit andto basement extract fan in case of fire.

• Activation of relevant alarm bells and shutting-off ventilation and air-conditioningequipment are detailed in Cause and Effect Schedule drawing.

• Fire alarms of Battery Room shall activate relevant alarm bells as shown on Causeand Effect Schedule and shutting-off Battery Room exhaust fans and A.C. packageunits.

• The main fire alarm panel shall remotely transmit fire alarm and fault signals toNational Control Centre (NCC) via RTU.

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EZD-04-10-76-P001

Fire Alarm & Detection kahra maa substations

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