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Version-0
DRAFT SPECIFICATION
FOR
AUTOMATIC FIRE DETECTION & SUPPRESSION SYSTEM
FOR
POWER EQUIPMENT & RELAY ROOM
OF
PI/RRI/ EI INSTALLATIONS
SPECIFICATION No. RDSO/SPN/NEW/2010
Version 0
Number of Pages -23
Issued by
SIGNAL DIRECTORATE
RESEARCH, DESIGNS & STANDARDS ORGANISATION
MINISTRY OF RAILWAYS
MANAK NAGAR
LUCKNOW – 226 011
Specification for Automatic Fire Detection & Suppression Systems for Power Equipments & Relay Room of PI/RRI/SSI/EI Installations
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DOCUMENT DATA SHEET
RDSO/SPN/NEW/2010
Version 0.0
Title of Document
DRAFT SPECIFICATION FOR AUTOMATIC
FIRE DETECTION & SUPPRESSION
SYSTEMS for POWER EQUIPMENTS &
RELAY
ROOM
OF
PI/RRI/SSI/EI
INSTALLATIONS
Authors
See Document Control Sheet
Approved by RDSO
Name: Sh. Mahesh Mangal
Designation: Sr. Executive Director/Signal
RDSO, Lucknow
Abstract
DRAFT
SPECIFICATION
FOR
AUTOMATIC
FIRE
DETECTION
&
SUPPRESSION SYSTEM for POWER EQUIPMENTS & RELAY ROOM OF
PI/RRI/SSI/EI INSTALLATIONS
Specification for Automatic Fire Detection & Suppression Systems for Power Equipments & Relay Room of PI/RRI/SSI/EI Installations
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Document Control Sheet
Name
Organization Function
Sh.
M.
K.
Mohanty, RDSO
JRE/Signal
Sh. P. K. Bhagchandani
RDSO
Asstt.Design Engineer/Signal
Sh.A.K.Jain
RDSO
Level
Member
Prepare
Member
Prepare
Member
Prepare
ExecutiveDirector/Signal
Specification for Automatic Fire Detection & Suppression Systems for Power Equipments & Relay Room of PI/RRI/SSI/EI Installations
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AMENDMENTS
Number
RDSO/SPN/NEW /2010
Chapter/
Annexure
Amendments
Date
Version 0.0
DD/MM/YYYY
Specification for Automatic Fire Detection & Suppression Systems for Power Equipments & Relay Room of PI/RRI/SSI/EI Installations
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RDSO/SPN/xxx/2010
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Table of Contents
S.
No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
Item
Page No.
Forward
Scope
General requirements
General arrangement of Automatic Fire Detection &
Suppression System (AFDSS)
Technical requirements
General requirement of detectors
Heat Detector for DG room
Heat Detector for Power Equipment room
Smoke Detector
Aspirating (air sampling) type smoke detector
Linear Heat Sensing (LHS) Cable
Linear Heat Sensing (LHS) Interface Module
Control Unit
Condensed Aerosol extinguishing medium
Requirements to be supplied by manufacturer/supplier
before approval
Inspection and Testing
Marking and Packing
Training
6
6
6
9
9
10
10
11
11
13
13
14
15
17
18
20
23
23
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DRAFT SPECIFICATION FOR AUTOMATIC FIRE DETECTION &
SUPPRESSION SYSTEM FOR POWER EQUIPMENT & RELAY ROOM OF
PI/RRI/EI INSTALLATIONS
0.0
1.0
FOREWORD
0.1
This specification is issued under the fixed serial number followed
by the year of adoption as standard or in case of revision, the year
of latest revision.
0.2
This specification requires reference to the following specifications.
IRS: S23
Electrical signaling and interlocking equipment
RDSO/SPN/144
Safety and Reliability requirement of electronic
signaling equipment
IS: 2175
Fixed Heat sensitive fire detector for use in
automatic fire alarm system temp …
IS 11360
smoke detectors for use in automatic electrical
fire alarm system.
IS: 2189
Selection Installation & maintenance of
automatic fire detection and alarm system code
of practice.
IS: 15528
gaseous fire extinguishing system – Carbon di
oxide, total flooding and local application
including in cabinet sub floors systems
IS: 15493
Gaseous fire extinguishing system – General
requirement
UL: 2127
Inert gas clean agent extinguishing system
unit.
UL: 2775
Outline of investigation for fixed condensed
aerosol extinguishing system unit.
0.3
Whenever reference to any specification appears in this document,
it shall be taken as a reference to the latest version of that
specification unless the year of issue of the specification is
specifically stated.
SCOPE
This document sets forth general, operational, technical and performance
requirements of Automatic Fire Detection & suppression System (AFDSS)
for power equipment & relay rooms of Panel Interlocking (PI), Route Relay
Interlocking (RRI) & Electronic Interlocking (EI) signaling installations.
2.0
GENERAL REQUIREMENTS
2.1
Automatic Fire Detection & suppression System (AFDSS) shall
consist of following:
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2.2
2.3
2.4
2.5
2.6
2.7
2.8
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2.1.1 Fire Detection & Alarm System (FDAS) - comprising of any
or all of the following detection systems:(a) Heat Detectors for DG room
(b) Heat Detectors for Power Supply Room
(c) Smoke detectors (for Power Supply Room)
(d) Linear Heat Sensing (LHS) cable along with its interface
module (for cable trays, cable troughs & cable bunch
etc.)
(e) Aspirating (air sampling) type smoke detector (for Relay
Room)
2.1.2 Alarm & Control Unit (ACU) - For reading the signals from
sensors/detectors, giving audio/visual alarms & actuating the
Fire Extinguishing System
2.1.3 Fire Extinguishing System (FES) - Condensed Aerosol
extinguishing medium based fire extinguisher, which are
activated either electrically or manually.
2.1.4 Other Items (OI) - like Chang over Switch for switching
Extinguishing system between Automatic to Manual mode,
connecting cables, relays etc. necessary for commissioning
& reliable operation of the AFDSS.
The Fire Extinguishing System shall be either initiated automatically
or manually.
The AFDSS shall be designed to work on power supply of 24 V DC
± 20% and also on 230 V AC± 20% having 24V battery back up for
at least 24 hours.
The AFDSS shall be self-checking & diagnostic type. It shall
continuously monitor the health of the sensors/ detectors & the
complete system. The data regarding health & event shall be
logged in the system with date & time stamp, which can be
downloaded to a PC/ Laptop at later stage. The system should
have capacity to store data for upto last one month.
The system shall be suitable for installation in electrical cabinets,
transformers, invertors, cable trays, electronic equipments, power
equipment rooms, relay rooms, or any other enclosed areas, which
are vulnerable for fire as deemed fit by Indian Railways.
The system shall be suitable to detect fire/ fire like situation in relay
room, power equipment room, electronic equipment, electrical
wiring etc. & shall be able to extinguish fire before it causes
damage to any of the above equipments.
The AFDSS shall work satisfactorily & reliably over the entire range
of following environmental parameters:
2.7.1 Temperature range:
-10ºC to + 70ºC
2.7.2 Humidity:
0 to 100%
Necessary shielding arrangement for the PCBs and Detection &
suppression circuits/devices to ensure proper functioning against
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2.9
2.10
2.11
2.12
2.13
2.14
2.15
2.16
2.17
2.18
2.19
2.20
2.21
2.22
2.23
2.24
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radio frequency /electromagnetic interference and electromagnetic
compatibility must be available.
In case it is felt necessary by the railways to add more or additional
sensors to the existing Fire Alarm System, the sensors/ detectors
covered in this specification shall be compatible with the already
existing Fire Alarm System.
It shall be possible to interface the existing Fire Alarm System,
wherever available, to the Fire Extinguishing System covered in this
specification.
It shall be possible to extend the alarm to remote location.
The system shall have manual override to initiate fire extinguisher
or to disable the system.
The system shall not raise false alarm and take action of fire
extinguishing.
The system shall be able to extinguish fire with high degree of
reliability.
The working of the equipment shall not cause interference to other
electrical/electronic circuits/systems and shall not damage relays,
wiring, power equipment etc.
In case of low battery, the system shall give alarm and indication.
All precautions regarding earthing & preventing hazard shall be
taken as per requisite clauses of IS 15493-2004
Quality requirement & storage shall be as per requisite clauses of
IS 15493-2004
The extinguishing system should incorporate a pre discharge alarm
with a time delay sufficient to allow personnel evacuation prior to
discharge
Time delay devices should be used only for personnel evacuation
or to prepare the hazard area for discharge.
Automatic/manual switch and lock off devices should be provided at
the entrance to the protected area where required.
The system shall not degrade the performance of relays, power
equipments, wiring, cables etc. when subjected to fire Detection &
suppression/extinguishing process.
The general principles of the Fire Detection & Alarm System
(FDAS) shall be as follows:2.23.1 Detection of fire and smoke shall be quick enough so that
Fire extinguishers are activated well in time in order to
prevent any damage to any equipment due to fire.
2.23.2 Shall reliably transmit the detected signal to Control Unit. So
that it can translate this detected signal into suitable alarm
signal and actuate fire extinguisher to extinguish the fire.
2.23.3 Monitor health of the system.
2.23.4 Indicate or display the location of fire / alarm activation
device.
Fire Extinguishing System shall have following characteristics:-
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2.24.1 The extinguishing agent, decomposition products, aerosol
forming solid compound, the cooling material and the
residue after fire extinguishing action shall not be harmful
to living beings, environment, electrical equipments,
electronic equipments, power equipments, signaling
equipments, relays and shall not cause interference to
working of electrical/electronic/signaling circuits/systems
and shall not damage relays, wiring, power equipment etc.
2.24.2 During the course of fire extinguishing process & after that,
it shall not provide any conductance or any insulation
between relay contacts, terminals & exposed wires.
2.24.3 It shall be friendly to the ozone layer & shall not deplete the
oxygen content.
2.24.4 The containers shall be non-pressurized.
2.24.5 Lifetime of fire extinguishing material shall be more than 10
years. Test report and certificate with full analysis report
from NABL/ILAC member accredited lab shall be
submitted.
2.24.6 There shall be an arrangement of refilling once the fire
extinguishing system is operated.
3.0
GENERAL ARRANGEMENT OF AUTOMATIC FIRE DETECTION &
SUPPRESSION SYSTEM (AFDSS):
Aspirating type
Smoke Detector
Heat & Smoke
Detector
Fire Extinguisher
with suitable
Detector
Heat Detector
Smoke Detector
Linear Heat Sensing Cable
Existing
Fire Alarm
System
4.0
Audio/
Visual
Alarms
LHS
Interface
Control Unit
TECHNICAL REQUIREMENTS
4.1
The AFDSS shall have Heat & Smoke sensors, which shall be
installed, at critical locations to detect smoke, temperature rise &
absolute temperature & send the signal to Control Unit. In addition,
Liner Heat Sensing cable shall be laid in cable trays, battery boxes,
power equipments etc. for heat detection & sending the signal to
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4.2
4.3
4.4
4.5
4.6
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Control Unit through an Interface. In Relay Rooms, Aspirating
Smoke detectors shall also be installed for early detection of
smoke. On getting the signals from above detectors/ sensors,
Control Unit shall give audio/ visual alarms & actuate the Fire
Extinguishing system automatically.
It shall also be possible to actuate Fire Extinguishing system
manually.
The Fire Detection & Alarm System shall monitor smoke,
temperature rise and absolute temperature. The sensing device
should be able to detect smoke signals after continuously
monitoring and temperature rise of the surrounding area.
The fire extinguishing system shall be based on the condensed
aerosol generator principle. The condensed aerosol generator is a
fire extinguishing system using solid material, which on activation is
transformed into a rapidly expanding fire extinguishing aerosol.
The extinguishing action shall not alter the quantity of oxygen
present in the environment significantly.
General requirement of detectors
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
4.6.6
4.6.7
4.7
RDSO/SPN/xxx/2010
Heat & Smoke detector shall be robust, rugged, temperproof & suitable for surface mounting.
Heat & Smoke detector shall incorporate state of art optical
chamber providing efficient & accurate detection of fire with
high level of reliability & high immunity to spurious signal.
Heat & Smoke detector shall incorporate integral LED
indicator to show the status of the detector.
Each Heat & Smoke detector shall have suitable
indications for indicating Normal healthy mode & Alarm
Indication mode.
The detector’s alarm condition shall be visible from a
distance of 6 Meters and shall be visually different from the
indications of the other conditions.
The insulation resistance of the detector shall not be less
than 10M ohm.
Failure of any indicators lamp shall not prevent the detector
from emitting fire signal indicating the existence of fire.
Heat Detector for DG Room
4.7.1 Probe type bi-metallic resettable type heat detectors shall be
used for this purpose.
4.7.2 It shall be suitable to use above 80ºC.
4.7.3 It shall be able to detect temperature and shall communicate
alarm signal to Control unit when temperature rises above
the defined value, which may be set at 80ºC, 90ºC or 100ºC
by the user.
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4.8
Heat Detector for Power Equipment Room
4.8.1 Heat Detector shall confirm to IS 2175-1988.
4.8.2 Heat detector shall be resettable type.
4.8.3 Heat detector shall be Rate-of-rise temperature-cum-fixed
temperature type detector.
4.8.4 The detectors shall be designed to operate within a given
time:
4.8.4.1 When the rate of temperature rise at the detector
exceeds a predefined value regardless of the actual
temperature; and
4.8.4.2 When temperature at the detector exceeds a
predefined value.
4.8.5 The detectors shall be provided with means for mounting (on
ceiling/wall) securely and independent of any support from
the attached wiring. The heat sensitive element(s) shall not
be closer than 15 mm of the detectors as per Clause 4.1 of
IS: 2175-1988
4.8.6 Plastic, if used for heat detector, shall not start softening,
deforming or melting at a temperature lower than 95ºC as
per Clause 4.2 of IS: 2175-1988
4.8.7 Heat sensitive detectors can be point or line type.
4.8.8 Heat detector shall be able to detect temperature and the
rate of rise of temperature and shall communicate alarm
signal to Control unit under any one of the following
conditions:
4.8.8.1 When the rate of temperature rise at the detector
exceeds 10°C per minute regardless of the actual
temperature.
4.8.8.2 When temperature at the detector exceeds a predetermined value of 70 ºC or as set by the user.
4.8.9 At rates of rise of air temp less than 1ºC/m, the detector shall
be required to operate at an air temp of not less then 58ºC
and not more than 65ºC, 73ºC or 81ºC as desired by the
purchaser. The detector shall respond within a time not
exceeding 11min 36 sec, 9 min 40 sec and 7min 44 sec
respectively for the above temperatures as per clause 5.7 of
IS: 2175-1988.
4.9
Smoke Detector
4.9.1 Smoke detector shall be of Optical (Photoelectric) smoke
detector and shall confirm to IS: 11360-1985.
4.9.2 The optical smoke detector operation shall be based on light
attenuation by smoke and/or light scattering by smoke
particles.
4.9.3 Smoke detector shall incorporate state of art optical chamber
providing efficient & accurate detection of fire with high level
of reliability & high immunity to spurious signal.
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4.10
4.11
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4.9.4 Smoke detector shall be able to detect smoke and shall
communicate alarm signal to Control unit when optical
density of smoke exceeds 0.1 dB/M (10 m visibility) as per
Clause 5.2 of IS: 2189-2008.
4.9.5 The response threshold value (r. t. v.) of smoke detector
shall not be less than .05dB/m. and the ratio of highest r. t. v.
and lowest r. t. v. shall not exceed 1.6 as per Clause 4.2 of
IS: 11360-1985.
4.9.6 The opening for smoke entry shall be at least 30 mm below
the ceiling level assumed smooth and flat as per Clause 3.8
of IS: 11360-1085.
Where Heat detector & Smoke detector are available as a
combined unit, the same may be used for power supply room.
However, the heat detector of combined detector shall meet the
requirements of clause 4.8 and smoke detector shall meet the
requirements of clause 4.9 of this specification.
The sitting and spacing of detectors of clause 4.7, 4.8 & 4.9 and
compensation to the spacing of detectors shall be as per Clause
6.3.3 & 6.3.3 of IS: 2189-2008.
4.11.1 Under flat ceilings, the horizontal distance between any point
in a protected area and the detector nearest tothat point
shall not exceed (1) 7.5 m in case of smoke detector, and (2)
5.3 m in case of heat detector.
4.11.2 In case of a sloping roof or pitched ceiling (where the
distance between the top of apex and bottom of the roof
exceeds 600 mm), spacing of detector at or in the vicinity of
apex may be spaced between 7.5 m and 8.5 m for smoke
detectors.
4.11.3 Detectors shall not be mounted within 500 mm of any walls,
partitions or obstructions to flow of smoke or hot gases, such
as structural beams and ductwork, where the obstructions
are greater than 250 mm in depth.
4.11.4 Spacing of 7.5 m for smoke detectors is valid up to a height
of 7 m only and that of 5.3 m for heat detector is valid only
up to a height of 5 m. Beyond these heights, spacing
between the detectors shall be adjusted as follows: 4.11.4.1
Smoke detectors for heights between 7 m and
10 m –5 m spacing
Beyond 10 m height- only beam detectors or
aspirating type detection system
4.11.4.2
Heat detectors for heights between 5 m and 7
m – 3.5 m spacing
Beyond 7 m height- not allowed to install heat
detectors
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4.12
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Aspirating (air sampling) type smoke detector
4.12.1 Air sampling type detector shall use laser. This type of
detector shall use piping or tubing distribution network that
shall run from the detector to the areas to be protected. The
aspiration fan in the detector housing shall draw air from the
protected area and back to the detector through air sampling
ports, piping or tubing. At the detector the air shall be
analyzed for fire products.
4.12.2 The detector shall have the capability of generating four
alarm signals depending upon level of smoke detected.
4.12.2.1 Stage 1 – 0.5% obs/m
4.12.2.2 Stage 2 – 1.0% obs/m
4.12.2.3 Stage 3 – 1.5% obs/m
4.12.2.4 Stage 4 – 2.0% obs/m
4.12.3 The value of smoke level for various stages of alarm can be
changed depending upon site conditions.
4.12.4 The piping or tubing to air sampling ports shall be laid
depending upon the floor area. Broadly the spacing between
them shall be approximately 25 meter to 50 meter for the
area 250 sq meters to 500 sq meters with holes in the piping
or tubing shall be 5 - 6 meters to 5 - 9 meters respectively.
4.13
Linear Heat Sensing (LHS) Cable
4.13.1 Temperature sensitive cable also known as Linear Heat
Sensing Cable shall be laid in all cable trays located in
Power Equipment room/ relay room. Signal about alarm
temperature shall be sent to Control Unit by LHS interface
module attached with cable system.
4.13.2 Linear Heat Sensing cables shall be of temperature
sensitive insulated wire type.
4.13.3
4.13.4 This linear heat sensing shall be in the form of continuous
cables consisting of copper conductors / cores and shall be
of analogue type.
4.13.5 Each core of analogue Linear Heat Sensing cable shall be
insulated with a negative temperature coefficient material.
An outer sheath of high temperature, flame retardant PVC
insulation, shall protect the cores. The outer sheath, as
well as the metallic braid shall not affect the performance
of the heat sensor (Clause 5.1.1.4 of IS: 2189-2008.
4.13.6 The Linear Heat Sensing cable for each zone / area shall
be connected to an electronic interface module, which shall
sense the temperature variations by continuously
monitoring the resistance of the negative temperature
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4.13.7
4.13.8
4.13.9
4.13.10
4.13.11
4.14
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coefficient core insulation. The electronic interface module
shall be located suitably in the area being protected.
The analogue linear heat sensing cable of every zone shall
be continuously monitored for open and short circuit. A
breakage, disconnection or a short between cores shall
initiate a FAULT alarm on the fire alarm panel of Control
Unit.
LHS cable shall be automatically resettable type.
The design of the analogue, linear heat sensing cable and
corresponding electronic sensing circuits shall be such that
the cable length and the number of required loops should
be set up to provide optimal coverage for the desired
region with cable length ranging from 10m to 200 m. The
system shall be designed to have an optimum sensitivity.
For a given length of sensing cables it shall be possible to
set the alarm temperature over a wide range from 70 130ºC with a interface Modulator and with a tolerance not
to exceed ± 5%.
The Linear heat sensing cable should have strong
capability to withstand the mechanical damage, tensile,
water and corrosion and electromagnetic interference.
Linear Heat Sensing (LHS) Interface Module
4.14.1 LHS Interface should be a microprocessor based start
point device that communicates between LHS Cable and
Control Unit should be an intelligent device that will monitor
LHS cable for continuity and over temperature fire
signatures.
4.14.2 It shall be possible to set any alarm temperature between
70-130ºC through Interface module.
4.14.3 An increase in temperature at any location along the LHS
cable's length shall lower the resistance between
conductors in the cable. The change in resistance shall be
detected by the interface module, which will trigger an
alarm at the control unit if the temperature rises above a
preset threshold.
4.14.4 The LHS interface shall be able to distinguish between a
Short Circuit Condition & an Actual Fire Event in order to
prevent unwanted activation of fire alarm/ fire extinguishing
system in case of an accidental short circuit fault by
damage to the sensor or field wiring.
4.14.5 The LHS interface should supervise the sensing cable for
temperature rate of rise condition, open & short circuit to
generate a fault condition which shall be displayed on the
interface module faceplate by the 2 LED indicators: FIRE
LED & FAULT LED.
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4.14.6 LED indicators shall also be provided for normal system
operation, faults, pre – alarm, fire – alarm status, battery
low indication and alarm.
4.14.7 LHS interface should perform simulation test for fire –
alarm, pre – alarm and fault signals.
4.15
Control Unit
4.15.1 Detection, actuation and control system may be either
automatic or manual. Where they are automatic provision
should also be made for manual operation
4.15.2 The Control Unit shall be the central processing unit of the
system, receiving and analyzing signals from Heat
detectors, Smoke Detectors, LHS Interface, Aspirating
Smoke Detectors and manual releasing devices, providing
audible and visual information to the user.
4.15.3 It shall have suitable audio/visual alarms for drawing
attention/indicating various events.
4.15.4 It shall also have the capability to electronically/electrically
activate and release Fire Extinguishing System.
4.15.5 The Control Unit shall have sufficient input ports for
connecting various sensors/ detectors alongwith their
interfaces, if any, & have sufficient output ports for
controlling fire extinguishing system, operating/switching
off electrical units and for interfacing with the existing Data
Logger system.
4.15.6 There shall be preferably one control unit for a station.
However, at stations having bigger relay room & power
equipment room deploying more number of sensors/
detectors, more than one Control Units can be provided but
there shall be a main control unit also to control fire
extinguishers, to provide alarms, for user interaction etc. of
the entire installation through the individual control units.
4.15.7 The entire system shall be suitable to operate at 24V±20%
DC as well as on 230 Volts + 20%, 50 Hz single phase AC
supply with 24 V DC sealed maintenance free battery with
battery charging system as secondary source with a power
back-up of at least 24 hours.
4.15.8 The Control Unit shall have means for the user to interact
& shall have suitable Detection & suppression to prevent
unauthorized use.
4.15.9 The panel of the control unit shall have the facility of
buzzer 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 suitable
means.
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4.15.10 The Control Unit shall have sufficient sets of Potential Free
NO/NC contacts; to trigger the Condensed Aerosol
extinguishing medium in the power equipment room/ relay
room/DG rfoom as per the requirement, switching off the
power supply to power equipment /relay room (if required)
and for interfacing with the existing Data Logger system.
The Control Unit shall be able to communicate and display
the exact number of the Sensor or the Part of the Linear
Heat Sensing Cable, which has activated the Fire
Detection System, for pinpoint location of the seat of fire.
4.15.11 The Control Unit shall be modular in structure, so that any
fault in any of the modules can be set right by simply
replacing the Faulty Module, with a spare.
4.15.12 It shall be possible to download data from Control unit
through suitable ports like RS232/ USB into a PC/Laptop
operating on Windows platform. The software for
downloading and analyzing fault data shall be provided &
shall be compatible with windows operating system.
4.15.13 Audio Visual Alarm
4.15.13.1 Audiovisual alarm shall be provided along with
Control Unit.
4.15.13.2 Audiovisual alarm system will get activated in
Control Unit in case of fire/smoke.
4.15.13.3 Audiovisual alarm shall be provided with provision
of resetting the hooter from Control Unit. However,
visual alarm shall continue to be lit till such time
the alarm conditions exist.
4.15.13.4 The audio alarm for fire alarm shall be electronic
hooter/horn/electric bell having a frequency range
of 500-1000 Hz. The sound of the fire alarm
should be continuous although the frequency &
amplitude may vary. If a two tone alarm is used, at
least one of the major frequencies should be
within the frequency range of 500-1000Hz.
4.15.13.5 The sound level shall be 65dB-100dB adjustable
to the site requirement.
4.15.14 Operating devices such as system isolate switches and
ancillary equipment; including shutdown equipment;
dampers and door closures, required for successful system
performance should be considered integral parts of the
system. All ancillaries should incorporate manual reset
facilities.
4.15.15 The software preferably should have the capability for the
following 4 levels of actions:
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4.15.15.1 Level 1 – When Stage 1 signal is received from
aspirating type smoke detector, it may activate a
visual in the fire risk area.
4.15.15.2 Level 2 – When Stage 2 signal is received from
aspirating type smoke detector it may activate the
electrical/electronic equipment shutdown relay and
activate visual in the Security Office or other
appropriate location.
4.15.15.3 Level 3 – When Stage 3 signal is received from
aspirating type smoke detector it may activate an
alarm condition in the Fire Alarm Control Panel to
call the Fire Brigade and activate all warning
systems.
4.15.15.4 Level 4 – It may be used to give alarm for
evacuation when any of the following conditions is
encountered:
(i) When Stage 4 signal is received from
aspirating type smoke detector.
(ii) When alarm signal is received from any of the
heat or smoke detectors or LHS module.
Subsequently, after a time delay of atleast 2
minutes (which can be set by the user upto 10
minutes & shall be in multiples of 0.5 minutes)
shall activate the fire suppression system.
4.15.16 The Alarm of Control Unit shall have means to indicate the
room i.e. Relay Room or Power Equipment Room or DG
Room from where the alarm situation has been reported
and shall also indicate the location of sensor in that room
which has reported the alarm situation. The Control unit
shall activate the fire extinguisher of that room only for
extinguishing the fire.
4.16
Condensed Aerosol extinguishing medium
4.16.1 The fire extinction and extinguishing media dispensers shall
be based on the condensed aerosol generators employing
solid potassium agents, which, on activation, transform into a
rapidly expanding fire extinguishing medium by combining
with oxygen ions. The extinguishing action effected through
physical and chemical chain reactions shall not alter
significantly the quantity of oxygen present in the
environment
4.16.2 The condensed aerosol extinguishing system shall be as per
NFPA 2010 standards, shall be UL listed and tested as per
provisions of UL 2775 by NABL/ ILAC member laboratories.
4.16.3 The basic concentration in volume (not including corrective
factor) shall be more than 25 gm/m³.
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4.16.4 The extinguishing agent, decomposition products, aerosol
forming solid compound, the cooling material and the
residue after fire extinguishing action shall not be harmful to
living beings, environment, electrical equipments, electronic
equipments, power equipments, signaling equipments,
relays and shall not cause interference to working of
electrical/electronic/signalling circuits/systems and shall not
damage relays, wiring, power equipment etc.
4.16.5 During the course of fire extinguishing process & after that, it
shall not provide any conductance nor any insulation
between relay contacts, terminals & exposed wires.
4.16.6 The containers shall be non-pressurized.
4.16.7 It shall not deplete the oxygen content
4.16.8 Lifetime of fire extinguishing material-up shall be minimum
10 years.
4.16.9 The Condensed Aerosol extinguishing medium based Fire
Extinguishing System shall be compatible with the existing
Fire Alarm unit wherever already existing.
5.0
REQUIREMENTS TO BE FULFILLED BY MANUFACTURER/SUPPLIER
BEFORE APPROVAL:
5.1
Certificates/Approvals/Experience
manufacturer:
of
the
product/
5.1.1 The manufacturer must be certified with ISO 9001:2000 (the
scope of the ISO Certification has to specifically refer to the
manufacturing of the full range of products).
5.1.2 The supplier can either be the manufacturer or its authorized
dealer. The supplier shall submit a valid certificate from the
manufacturer regarding authorized dealership.
5.1.3 The supplier shall provide certificates of all the projects
executed by them for various applications of the same or
similar systems during the last 5 years wherein they have
used same/similar type of fire fighting system. The supplier
shall also submit certificates regarding use of AFDSS in
relay room/ power equipment room/ electronic equipment on
any of the Railways.
5.1.4 Certificate of satisfactory performance from any Railways
where such AFDSS have been installed in relay rooms,
power equipment rooms and modern solid state signalling
equipment rooms of signaling installation shall be submitted.
5.1.5 The supplier shall submit test report and certificate with full
analysis report from NABL/ILAC member accredited lab in
reference to Fire Extinguishing System for the followings:
5.1.5.1 The extinguishing agent, decomposition products,
aerosol forming solid compound, the cooling
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5.2
5.3
5.4
5.5
5.6
5.7
5.8
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material and the residue after fire extinguishing
action shall not be harmful to living beings,
environment, electrical equipments, electronic
equipments,
power
equipments,
signaling
equipments, relays and shall not cause interference
to
working
of
electrical/electronic/signalling
circuits/systems and shall not damage relays,
wiring, power equipment etc.
5.1.5.2 During the course of fire extinguishing process &
after that, it shall not provide any conductance nor
any insulation between relay contacts, terminals &
exposed wires.
5.1.5.3 The containers shall be non-pressurized.
5.1.5.4 It shall not deplete the oxygen content.
5.1.5.5 It shall work in the entire range of environmental
parameters mentioned in clause 2.7.
5.1.5.6 Lifetime of fire extinguishing material-up shall be
minimum 10 years.
5.1.6 Product Certification / Listing of Fire Extinguishing System
by any of the following International Accredited Institutes,
e.g. UL, ULC, KIWA, LPCB, VDS, BSI etc. which certify / list
all models and all mechanical components (brackets, etc.)
according to the existing standards on condensed aerosol
technology (CEN, BRL-K23001, NFPA 2010, UL2127, UL2775 etc).
Manufacturer shall guarantee for supply of spares during life of the
equipment & extend maintenance support, if required by the
Railway/purchaser.
The supplier shall supply detailed instructions for proper installation
of the system. The supplier shall depute his engineers/supervisors
to purchaser’s site during installation of the equipment.
The supplier shall associate themselves during commissioning,
testing and field trials of the system.
The supplier shall install & commission the system at the locations
identified by RDSO for field trials. The detailed field trials to
ascertain the suitability of the system shall be carried out by RDSO
and Zonal Railways before considering the supplier for approval.
The supplier will also offer special tools and instruments separately,
which may be required for maintenance.
The supplier shall submit recommended list of spares required for
satisfactory maintenance and operation of the AFDSS.
The supplier shall submit design manual for the system containing
detail functioning of each item and its sub-assembly giving following
details about: 5.8.1 Testing procedure
5.8.2 Diagram & layout.
5.8.3 Write up on the working of fire and smoke detection system
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5.9
5.10
5.11
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The supplier shall supply the user's manual for maintenance and
trouble shooting.
The supplier shall be responsible for carrying out improvements
and modifications at his own expense on all the equipments
supplied, provided such modifications / improvements are decided
to be necessary for meeting the requirements of reliability,
performance and safety etc, jointly between contractor and
purchaser.
For the purpose of technical decisions on improvements/
modifications etc. on equipment, the final authority from the
purchaser’s side will be RDSO.
INSPECTION AND TESTING:
6.1
6.2
6.3
6.4
Type, routine and acceptance tests on for fire / smoke detection
and extinguishing system will be conducted by nominated
agencies. Type test will be conducted by RDSO on one set to verify
that product meets the design and performance requirement of the
specification. Some or all type test may be repeated after a period
of three years to confirm the quality of the product to meet the
specified requirement.
In addition, the manufacturer shall also repeat the type test to be
witnessed by RDSO either totally or in part in following cases
without any additional cost.
6.2.1 Modification of equipment likely to affect its function.
6.2.2 Failure or variations established during type test.
6.2.3 Resumption of production after an interruption of more than
two years.
6.2.4 The routine tests are to be carried out by manufacturer on
each unit to verify that properties of the product
corresponding to those measured during type test.
Acceptance test shall be carried out by inspecting agencies
nominated to accept supply lot.
For type test, one complete system consisting of fire / smoke
detection and extinguishing system shall be subjected to following
tests as applicable:
6.4.1
6.4.2
6.4.3
6.4.4
6.4.5
6.4.6
6.4.7
6.4.8
Visual check
Performance test
Reverse Polarity test
Insulation Resistance test
Card-level functional tests on all the cards.
System level functional tests.
Endurance test
Testing of fire / smoke detection and extinguishing system
casing for IP 30 protection to be certified by the Govt.
approved testing laboratories
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6.5
6.6
6.7
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6.4.9 Following tests to be certified by one of the Govt. testing
laboratories on electronic equipment i.e. controller, power
supply sensor etc as per IEC 60571-1:6.4.9.1 Dry heat test
6.4.9.2 Damp heat test
6.4.9.3 Combined heat humidity and dust test
6.4.9.4 Vibration and shock test
6.4.9.5 Voltage surge test
6.4.9.6 Dielectric test/ Applied High Voltage Test
6.4.9.7 EMI/EMC test as per IEC 61000. (Electrical Fast
transient /Burst immunity test as per IEC 61000-4-4,
Surge test as per IEC 61000-4-5, Electrostatic
discharge test as per IEC 61000-4-2 and Radiated
susceptibility test as per IEC 61000-4-3)
6.4.9.8 Condensed Aerosol extinguishing medium shall be
subjected to all the test as specified in UL 2127
and/or test specified in UL 2775.
6.4.9.9 The system shall successfully pass all the type tests
for proving conformity with this specification. If any
one of the equipment fails in any of the type tests,
the purchaser or his nominee at his discretion, may
call for another equipment/card(s) of the same type
and subject it to all tests or the test(s) in which
failure occurred. No failure shall be permitted in the
repeat test(s).
Acceptance Test:
Acceptance test shall be carried out on 20% of the lot offered
(Minimum 2 of each lot).
6.5.1 Visual
6.5.2 Performance test
6.5.3 System level functional tests
6.5.4 Reverse Polarity test
6.5.5 Insulation Resistance test
6.5.6 Dielectric test/ Applied High Voltage Test
6.5.7 Damp heat test
Routine Test
For Routine test, complete system shall be subjected to following
tests by manufacturer
6.6.1 Visual
6.6.2 Performance test
6.6.3 System level functional tests
6.6.4 Reverse Polarity test
6.6.5 Insulation Resistance test
6.6.6 Dielectric test/ Applied High Voltage Test
Visual Inspection:
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6.7.1 The unit shall be checked for proper manufacturing, proper
fitment in its enclosure, connection and dimensions as
agreed between manufacturer and purchaser.
6.7.2 Each equipment of the system shall be visually inspected to
ensure compliance with the requirement of clauses of this
specification. The visual inspection shall broadly include :
6.7.3 System Level Checking:
6.7.3.1 Constructional details.
6.7.3.2 Dimensional check.
6.7.3.3 General workmanship.
6.7.3.4 Configuration.
6.7.4 Card Level Checking:
6.7.4.1 General track layout.
6.7.4.2 Quality of soldering and component mounting.
6.7.4.3 Conformal Coating.
6.7.4.4 Legend printing.
6.7.5 Module Level Checking:
6.7.5.1 Indications and displays.
6.7.5.2 Mounting and clamping of connectors.
6.7.5.3 Proper housing of cards
6.8
6.9
6.10
Performance Test
6.8.1 Fire / smoke detection and extinguishing system shall be
able to detect smoke, temperature and the rate of rise of
temperature as per the following conditions.
6.8.1.1 When the rate of temperature rise at the detector
exceeds 10 °C per minutes regardless of the actual
temperature.
6.8.1.2 When temperature at the detector exceeds a perdetermined value of 80-90°C.
6.8.1.3 When optical density of smoke exceeds 0.1 Du (10
m visibility.)
6.8.1.4 When LHS cable senses temperature beyond 80130 deg C and rate of rise is more than 10 deg C
per min
6.8.2 Audio Visual alarm shall be functional whenever the limits as
above are exceeded
6.8.3 Data downloading of fire event to be checked.
6.8.4 Effectiveness of fire fighting system in extinguishing fire shall
be checked as per Test method specified in UL2127 /
UL2775.
Reverse Polarity Test
The unit shall be functional after applying 200V DC for one minute
in the correct polarity as well as in the reverse polarity.
Insulation Resistance Test
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6.11
6.12
6.13
6.14
7.0
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The insulation resistance of the unit between the earth (enclosure)
and the current carrying parts shorted together shall be more than
20M ohms when measured with 500V meggar.
Endurance Test:
The temperature cum smoke sensor shall be kept in a chamber
having 80-90 deg C temperature for 2 minutes and then shall be
kept in open atmosphere for 2 minutes. The system should give
required audiovisual alarm and specified indications. 100 such
cycle shall be repeated continuously for checking the endurance of
unit. Similarly, 100 cycles will be repeated for smoke sensing.
Other Tests
The tests i.e. Dry heat test, Damp heat test, Combined heat
humidity and dust test, Vibration, shock & bump test, Voltage
surge test shall be conducted as per IEC 60571-1 latest either at
RDSO or ERTL/Govt. approved test agency and results shall be
submitted.
The manufacturer shall furnish results of all the tests and inspection
carried out internally and in the presence of Railways
representative to RDSO.
Any design improvement found necessary as a result of these
tests/trials shall be carried out by the tenderer in the least possible
time free of cost.
MARKING AND PACKING
7.1
7.2
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RDSO/SPN/xxx/2010
The following information shall be clearly marked at a suitable place
on each equipment:
7.1.1 Name and Address of the manufacturer.
7.1.2 Year of the manufacturer.
7.1.3 Serial number of Equipment
7.1.4 Specification number
7.1.5 Connection diagram of the equipment on the side of the
cover.
The equipment and its sub assemblies shall be packed in thermo
Cole boxes and the empty spaces shall be filled with suitable filling
material. Before keeping in the thermo Cole box, the equipment
shall be wrapped with bubble sheet. The equipment shall be finally
packed in a wooden case of sufficient strength so that it can
withstand bumps and jerks encountered in a road/rail journey.
TRAINING:
The supplier shall impart suitable training in operation & maintenance
inspection & testing of the AFDSS.
**************
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