Draft Specification For Automatic Fire Detection & Alarm .

Effective from dd.mm.yyyyRDSO/SPN/217/2016 (Draft)Version-03.0 GENERAL ARRANGEMENT OF AUTOMATIC FIRE DETECTION & ALARMSYSTEM (AFDAS)Aspirating typeSmoke DetectorProbe typeBimetallic HeatDetectorSmoke & Heat MultiSensorAudio/ VisualAlarms withDisplayLHSInterfaceLinear Heat Sensing CableExisting FireAlarmSystemControl Unit4.0 TECHNICAL REQUIREMENTS4.1The AFDAS shall have Probe type Bimetallic Heat detector, Heat &Smoke multi sensors and aspiration type smoke detector whichshall be installed, at critical locations to detect smoke, temperaturerise & absolute temperature & send the signal to Control Unit. TheAFDAS shall be an addressable system and detector shall have inbuilt address select switch. In addition, Liner Heat Sensing cableshall be laid in cable trays, battery boxes, power equipments etc.for heat detection & sending the signal to Control Unit through anInterface. In Relay Rooms, Aspirating Smoke detectors shall alsobe installed for early detection of smoke. On getting the signalsfrom above detectors/ sensors, Control Unit shall give audio/ visualalarms to the railway personal to actuate Fire Extinguishing systemmanually. The AFDAS shall also have to feature to trigger‘Automatic Fire Suppression System’ when the suppression systemis interfaced with AFDAS.4.2GENERAL REQUIREMENT OF DETECTORS4.2.14.2.2Heat & Smoke multi sensor shall be robust, rugged &suitable for surface mounting.Heat & Smoke multi sensor shall incorporate state of artoptical chamber providing efficient & accurate detection offire with high level of reliability & high immunity to spurioussignal. The sensitivity of the Heat & Smoke detector shallSpecification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 9 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from 16 (Draft)Version-0vary with the ambient conditions including dust particles toreduce false alarms.Heat & Smoke multi sensor shall incorporate integral LEDindicator to show the status of the detector.Each Heat & Smoke multi sensor shall have suitableindications for indicating Normal healthy mode & AlarmIndication mode.The detector’s alarm condition shall be visible from adistance of 6 Meters and shall be visually different from theindications of the other conditions.The insulation resistance of the detector shall not be lessthan 10M ohm.Failure of any indicators lamp shall not prevent the detectorfrom emitting fire signal indicating the existence of fire.4.3PROBE TYPE BI-METALLIC HEAT DETECTOR FOR DIESELGENERATOR/OIL STORAGE ROOM4.3.1 Probe type bi-metallic resettable type heat detectors shall beused for this purpose. This equipment shall be as per IS2189.4.3.2 It shall be suitable to use above 80ºC.4.3.3 It shall be able to detect temperature and shall communicatealarm signal to Control unit when temperature rises abovethe defined value, which may be set at 80ºC, 90ºC or 100ºCby the user.4.4HEAT & SMOKE MULTI SENSOR FOR POWER EQUIPMENTROOM4.4.1 It shall use a combination of photoelectric and thermalsensing technologies to increase immunity to false alarms.4.4.2 It shall automatically adjust the sensitivity level without theoperator intervention based on ambient conditions.4.4.3 Its Operating temperature shall be -10 C to 70ºC.4.4.4 It shall have in-built address select switch.4.4.5 It shall detect the rate of temperature rise in addition to thephoto electric smoke detection.4.4.6 It shall be resettable type.4.4.7 The detectors shall be provided with means for mounting (onceiling/wall) securely and independent of any support fromthe attached wiring.4.4.8 Plastic, if used for detector, shall not start softening,deforming or melting at a temperature lower than 95ºC asper Clause 4.2 of IS: 2175-19884.4.9 The sensitivity of heat detector in this multi-sensor shall varyfrom 0.5-4% /feet obscuration (NFPA-318). Smoke detectorSpecification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 10 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from dd.mm.yyyy4.5RDSO/SPN/217/2016 (Draft)Version-0in this multi-sensor shall be able to detect smoke and shallcommunicate alarm signal to Control unit when opticaldensity of smoke exceeds 0.1dB/m (10 m visibility) as perClause 5.2.1 of IS: 2189-2008.4.4.10 The response threshold value (r. t. v.) of smoke detection inthis detector shall not be less than 0.05 dB/m. and the ratioof highest r. t. v. and lowest r. t. v. shall not exceed 1.6 asper Clause 4.2 of IS: 11360-1985.4.4.11 The color of the detector shall be as per the color codespecified in Table 17.6.2.1 of NFPA 72. The temperatureclassification is Intermediate with maximum ambient ceilingtemperature fixed at 69ºC.The sitting and spacing of detectors shall as under (Clause 6.3.3 ofIS 2189-2008 & NFPA 72) :4.5.1 For Ceilings up to height of 5m, the spacing betweendetectors (S) shall be 5.3m.4.5.2 For Ceilings with height between 5m to 7m, the spacingbetween detectors (S) shall be 3.5 m.4.5.3 For Ceilings with height more than 7m, only aspirating typesmoke detectors to be used.4.5.4 Spacing between nearest wall to the detector shall not beless than ½ of the spacing between detectors (S).4.5.5 Spacing between corners and the nearest detector shall notbe less than 0.7 times the spacing between detectors (S).4.5.6 Suitable spacing to be kept for providing futuresprinklers/suppression systems.4.5.7 The typical planning for placing of detectors in a room isshown in the following diagram.Specification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 11 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from dd.mm.yyyy4.6RDSO/SPN/217/2016 (Draft)Version-0ASPIRATING (AIR SAMPLING) TYPE SMOKE DETECTOR4.6.1 The air sampling–type detector system should be able towithstand dusty environments by air filtering, electronicdiscrimination of particle size, or other listed methods orcombinations thereof. The detector should be capable ofproviding optimal time delays of alarm outputs to eliminatenuisance alarms due to transient smoke conditions. Thedetector should also provide facilities for the connection ofmonitoring equipment for the recording of backgroundsmoke level information necessary in setting alert and alarmlevels and delays.4.6.2 Air sampling type detector shall use LASER. This type ofdetector shall use piping or tubing distribution network thatshall run from the detector to the areas to be protected. Theaspiration fan in the detector housing shall draw air from theprotected area and back to the detector through air samplingports, piping or tubing. At the detector, the air shall beanalyzed for fire products.4.6.3 The detector shall have the capability of generating fouralarm signals depending upon level of smoke detected.4.6.3.1 Stage 1 – 0.5 to 0.95% obs/m4.6.3.2 Stage 2 – 1.0 to 1.45% obs/m4.6.3.3 Stage 3 – 1.5 to 1.95 % obs/m4.6.3.4 Stage 4 – 2.0% obs/m4.6.4 The value of the defined smoke levels above for variousstages of alarm can be changed depending upon the siteconditions.4.6.5 The piping or tubing to air sampling ports shall be laiddepending upon the floor area as per NFPA 76 Para 8.3.1.1detailed as below:4.6.5.1Each sampling point installed shall be limited to amaximum coverage area of 18.6 sq. m.4.6.5.2Maximum transport time from the most remote port tothe detection unit of an air-sampling system shall notexceed 60 seconds.4.6.5.3Minimum sensitivity settings above ambient airbornelevels for the air sampling system installed shall be asfollows:4.6.5.3.1.1 Alert condition: 0.2 percent per footobscuration (effective sensitivity at each port).4.6.5.3.1.2 Alarm condition 1.0 percent per footobscuration (effective sensitivity at each port).Specification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 12 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from dd.mm.yyyyRDSO/SPN/217/2016 (Draft)Version-04.7PIPING STANDARDS4.7.1.1The pipes used in the pipe network can be made ofvarious materials including copper, PVC, ABS, UPVCand CPVC to cater for ceiling temperature of 69ºCand their assemblies such as couplings, unions,elbows, tees, end caps, capillary tubes, samplingports, mounting brackets and they shall be testedin accordance with ASTM E 814.4.7.1.2All distribution piping shall be installed by qualifiedindividuals using accepted practices and qualityprocedures.4.7.1.3In cabinet and above cabinet sampling also shall beplanned as per request of purchaser.4.7.1.4The system integrator shall carry out the pipingdesign and validate the same with a hydraulic flowcalculation generated by using the UL/FM/Vds/LPCBapproved software. The appropriate fill density shallbe arrived at based on the same.4.7.1.5The design & calculation shall be checked & ngineer.4.7.1.6Plans and calculations shall be approved prior toinstallation.4.8LINEAR HEAT SENSING (LHS) CABLE4.8.14.8.24.8.34.8.4Temperature sensitive cable also known as Linear HeatSensing Cable shall be laid in all cable trays located inPower Equipment room/ relay room. Signal about alarmtemperature shall be sent to Control Unit by LHS interfacemodule attached with cable system.Linear Heat Sensing cables shall be of temperaturesensitive insulated wire type.This linear heat sensing shall be in the form of continuouscables consisting of copper conductors / cores and shall beof analogue type.Each core of analogue Linear Heat Sensing cable shall beinsulated with a negative temperature coefficient material.(Clause 5.1.1.4 of IS: 2189-2008). An outer sheath of hightemperature, flame retardant PVC insulation, shall protectthe cores. The outer sheath, as well as the metallic braidshall not affect the performance of the heat sensor.Specification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 13 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from dd.mm.yyyyRDSO/SPN/217/2016 (Draft)Version-04.8.5The Linear Heat Sensing cable for each zone / area shallbe connected to an electronic interface module, which shallsense the temperature variations by continuouslymonitoring the resistance of the negative temperaturecoefficient core insulation. The electronic interface moduleshall be located suitably in the area being protected.4.8.6The analogue linear heat sensing cable of every zone shallbe continuously monitored for open and short circuit. Abreakage, disconnection or a short between cores shallinitiate a FAULT alarm on the fire alarm panel of ControlUnit.4.8.7LHS cable shall be automatically resettable type.4.8.8The design of the analogue, linear heat sensing cable andcorresponding electronic sensing circuits shall be such thatthe cable length and the number of required loops shouldbe set up to provide optimal coverage for the desiredregion with cable length ranging from 10m to 200 m. Thesystem shall be designed to have an optimum sensitivity.4.8.9For a given length of sensing cables it shall be possible toset the alarm temperature over a wide range from 70 ºC 130ºC with an interface Modulator and with a tolerance notto exceed 5%.4.8.10 The Linear heat sensing cable should have strongcapability to withstand the mechanical damage, tensile,water and corrosion and electromagnetic interference.4.9LINEAR HEAT SENSING (LHS) INTERFACE MODULE4.9.14.9.24.9.34.9.4LHS Interface should be a microprocessor based devicethat communicates between LHS Cable and Control Unit. Itshould be an intelligent device that will monitor LHS cablefor continuity and over temperature fire signatures.It shall be possible to set any alarm temperature between70-130ºC through Interface module.An increase in temperature at any location along the LHScable's length shall lower the resistance betweenconductors in the cable. The change in resistance shall bedetected by the interface module, which will trigger analarm at the control unit if the temperature rises above apreset threshold.The LHS interface shall be able to distinguish between aShort Circuit Condition & an Actual Fire Event in order toprevent unwanted activation of fire alarm system, in caseof an accidental short circuit fault by damage to the sensoror field wiring.Specification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 14 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from dd.mm.yyyy4.9.54.9.64.10RDSO/SPN/217/2016 (Draft)Version-0The LHS interface should supervise the sensing cable fortemperature rate of rise condition, open & short circuit togenerate a fault condition which shall be displayed on theinterface module faceplate by the 2 LED indicators: FIRELED & FAULT LED.LED indicators shall also be provided for normal systemoperation, faults, pre – alarm, fire – alarm status.CONTROL UNIT4.10.1 Detection, actuation and control system shall haveprovision for automatic as well as manual operation. Wherethey are automatic, provision should also be made formanual operation.4.10.2 The Control Unit shall be the central processing unit of thesystem, receiving and analyzing signals from Heatdetectors, Smoke Detectors, LHS Interface, AspiratingSmoke Detectors and manual releasing devices, providingaudible and visual information to the user.4.10.3 It shall have suitable audio/visual alarms for drawingattention/indicating various events.4.10.4 It shall also have the capability to electronically/electricallyactivate and release Fire Extinguishing System, if usedany.4.10.5 The Control Unit should be located in Station Master’sRoom.4.10.6 The Control Unit shall have sufficient input ports forconnecting various sensors/detectors along with theirinterfaces, if any, & shall have sufficient output ports forcontrolling fire extinguishing system, operating/switchingoff electrical units and shall have provision for remotemonitoring in network. The software shall be approved byUL/FM/Vds/LPCB.4.10.7 There shall be preferably one control unit for a station.However, at stations having bigger relay room & powerequipment room deploying more number of sensors/detectors, more than one Control Units can be provided butthere shall be a main control unit also to control fireextinguishers, to provide alarms, for user interaction etc. ofthe entire installation through the individual control units.4.10.8 The entire system shall be suitable to operate at 24V 20%DC as well as on 230 Volts 20%, 50 Hz single phase ACsupply with 24 V DC VRLA as per IRS: S-93/96(A) or latestwith battery charging system as secondary source with apower back-up of at least 24 hours.Specification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 15 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from dd.mm.yyyyRDSO/SPN/217/2016 (Draft)Version-04.10.9 The Control Unit shall have means for the user to visualizeand interact with the complete Automatic Fire Detectionand Alarm System layout through a user friendly softwareexecutable on a standard Windows based PersonalComputer.4.10.10 The panel of the control unit shall have the facility ofbuzzer silence, alarm silence and alarm activate, lamp test& reset. The panel shall indicate the status like fire, fault,disable, test, supply, supply fault, battery fault, aux. supply,fault, and earth fault by respective LEDs/other suitablemeans.4.10.11 The Control Unit shall have sufficient sets of Potential FreeNO/NC contacts; to trigger the extinguishing medium in thepower equipment room/ relay room/DG room if used,switching off the power supply to power equipment /relayroom (if required) and for interfacing with the existing DataLogger system. The Control Unit shall be able tocommunicate and display the exact number of the Sensoror the Part of the Linear Heat Sensing Cable, which hasactivated the Fire Detection System, for pinpoint location ofthe seat of fire.4.10.12 The Control Unit shall be modular in structure, so that anyfault in any of the modules can be set right by simplyreplacing the Faulty Module, with a spare.4.10.13 It shall be possible to download data from Control unitthrough suitable ports like RS232/ USB into a PC/Laptopoperating on Windows platform. The software fordownloading and analyzing fault data shall be provided &shall be compatible with windows operating system.4.10.14 Audio Visual Alarm:4.10.14.1 Audiovisual alarm shall be provided along withControl Unit.4.10.14.2 Audiovisual alarm system will get activated inControl Unit in case of fire/smoke.4.10.14.3 Audiovisual alarm shall be provided with provisionof resetting the hooter from Control Unit. However,visual alarm shall continue to be lit till such timethe alarm conditions exist.4.10.14.4 Visual Alarms: It shall work on 24V DC and shallbe preferably flashing type.4.10.14.5 Audio Alarms: It shall work on 24V DC and shallbe preferably with Piezo-Electric type sounder withtone type of Fire-Engine. The sound level shall bepreferably adjustable type up to 90db at a distanceof 1m.Specification for Automatic Fire Detection & Alarm Systems for Power Equipments & Relay Room of PI/RRI/EI InstallationsPage 16 of 24SignatureName &DesignationPrepared By: P.K. BaidhyaJE/D/Signal1st level Check By: S.K. JainSSE/Signal2nd level Check By: G. Pavan KumarDirector/IV/Signal

Effective from dd.mm.yyyyRDSO/SPN/217/2016 (Draft)Version-04.10.14.6 Audio and Visual alarms can be extended to ESMduty room.4.10.15 Operating devices such as system isolate switches andancillary equipment; including shutdown equipment;dampers and door closures, required for successful systemperformance should be considered integral parts of thesystem. All ancillaries should incorporate manual resetfacilities.4.10.16 The software preferably should have the capability for thefollowing 4 levels of actions:4.10.16.1 Level 1 – When Stage 1 signal is received fromaspirating type smoke detector, it may activate avisual alarm near control panel.4.10.16.2 Level 2 – When Stage 2 signal is received fromaspirating type smoke detector it may activatevisual and audio alarm in the SM Room.4.10.16.3 Level 3 – When Stage 3 signal is received fromaspirating type smoke detector it may activate analarm condition in the Fire Alarm Control Panel toinitiate Railway Staff for extinguishing the fire andshutting off the power supply to signalling system,if required.4.10.16.4 Level 4 –Whe

2.1 Automatic Fire Detection & Alarm System (AFDAS) shall consist of the following: 2.1.1 Fire Detection & Alarm System (FDAS) - comprising of any or all of the following detection systems:- (a) Bimetallic Heat detectors for Diesel Generator/Oil Storage room. (b) Heat and Smoke multi sensors for Power Supply Room.