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RDSO/SPN/144 - Indian Railway

1. IS 9000 Yes Yes Yes Yes Yes Part III 70 C Sect 3 2 C The rate of change of Temp shall not exceed 1 C per min averaged over 5 min Condition Fully functional during test ee test IS 9000 Yes i a ee II 10 C 3 C The Sect 3 rate of change of Temp shall not exceed 1 C per min tie over 5 min Condition Fully functional during test Cyclic Pat V 12 12 h cycle Variant 1 Page 22 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 40 2 C 3 4 days Condition Fully functional Damp heat test IS 9000 Steady state Part IV during test Condition Fully functional during one hour period towards end of any intermediate cycles and last cycle Stabilization shall be done at 25 3 C Mist Damp Procedure 2 2 hours Fart AI 7 days procedu Procedure 3 2 hours 3 2 22 hours 93 2 3 Cycle Procedure 3 3 Procedure 2 4 Condition After this test electrical parameters shall be monitored in addition to physical checks Part XII Condition After this test electrical parameters shall be monitored in addition to physical checks Water Immersion test No Yes Ne Yes No 24 hours Condition After this test electrical parameters shall be monitored in addition to physical checks Ingress of water Page 23 of 38 Effective from 02 2014
2. Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT SAFETY AND RELIABILITY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT SPECIFICATION No RDSO SPN 144 2014 Draft Pages 38 SIGNAL DIRECTORATE RESEARCH DESIGN amp STANDARDS ORGANISATION LUCKNOW 226 011 Page of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT DOCUMENT DATA SHEET Designation Revision RDSO SPN 144 2014 3 0 Title of Document SAFETY AND RELIABILITY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT Authors Mudit Anand Designation Joint Director Signal RDSO Approved by Name Shri Mahesh Mangal Designation Sr Executive Director Signal RDSO Abstract This document defines Safety and Reliability Requirement of Electronic Signalling Equipment Page 2 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT DOCUMENT CONTROL SHEET NAME ORGANIZATION FUNCTION LEVEL Mudit Anand RDSO Member Prepare Mahesh Mangal RDSO Approve Page 3 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY RE
3. Hardware HXX will increment by one Version number shall be displayed on each PCB as per clause 6 11 of this specification Similarly version number shall be displayed on the name plate of the equipment as per clause 12 4 of this specification The software version number shall appear on the LCD LED display board immediately after power ON and shall be displayed for 10 seconds The system shall display version number of the software for 10 seconds either by giving suitable command or by pressing a button Each document manual of the manufacturer shall contain the history of the changes in version along with accompanying changes in the manual if any Page 10 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 2 7 5 2 7 6 2 8 2 8 1 2 8 2 2 8 3 2 8 4 2 8 5 Signalling equipments which do not have any embedded software shall follow the following format for version number DXXHXX DXX HXX Basic Design Change Hardware Change D Design H Hardware XX are numeric two digit numbers Thus the initial version of any equipment will be D01H01 In every case of modification upgradation improvement of Basic Design DXX will increment by one In every case of modification upgradation improvement of Hardware HXX will increment by one For equipments propo
4. Where high levels of EMC performance are required care should be taken to choose a case where the continuity of the screen is not breached The case should ideally be made of as few elements as possible At each joint there will be the possibility of radiation passing through Where joints to occur they should be as tight as possible and they should have good continuity between them Screened lines and cables When lines and cables need to pass into or out of a unit the cables can be screened to prevent any radiation of the signals being carried or pick up of external signals However when screened cables are needed for electromagnetic compatibility EMC applications the screen must be bonded to the equipment signal ground as soon as it enters the unit otherwise unwanted signals may be radiated or picked up and this would compromise the EMC compliance Page 27 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 9 4 2 9 4 3 9 4 4 9 4 4 1 EMI EMC test stages In order that a product may pass its EMC compliance the EMC testing should be undertaken at various stages of the life of the product enlisted as under Development test e Pre compliance test e EMC compliance test e Production test EMC test types Following testing for EMI EMC generally need to be conducted Conducted emissions Radiated emissions Co
5. s 5 Voltage protection level Up lt 2 5 KV lt 2 5 KV 6 Short circuit withstand and follow up 2 gt 3KA gt 100A current extinguishing capacity without back up fuse I lt Page 32 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 7 Operating temperature RH 25 C 80 C 25 C 80 C 195 95 8 Mounted on din rail din rail The Class B SPD will be followed by Class II C SPD adjacent to it and connected between Line amp Neutral The device shall be a single compact varistor of proper rating and in no case a number of varistors shall be provided in parallel It shall be voltage clamping device thermal disconnecting type and shall be tested as per IEC 61643 with the following characteristics and features SN Parameters Limits 1 Nominal Voltage Up 230V 2 Maximum continuous operating voltage gt 300V Uc 3 Nominal discharge current between gt 10KA 8 20us for each phase R Y B amp N In 4 Maximum discharge current between L gt 40KA 8 20us amp N Imax 5 Response time T lt 25 fis 6 Voltage protection level U at In lt 1 5 KV 7 Operating temperature RH 25 C 80 C 95 8 Mounted on din rail Class B and class II C SPDs of Stage shall be so coordinated that the voltage protection level of the coordinated devi
6. 02 2014 Specification no RDSO SPN 144 2014 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT Revision 3 S No 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 14 0 16 0 TABLE OF CONTENTS Item Foreword Scope General Requirements of Signal Engineering Manual Fail safety requirement Hardware Printed Circuit Board Software Requirements Transmission of Signalling Information Environmental and Climatic Requirements Power Supply Requirements Lightning and Surge Protection for Electronic Signalling Equipment Marking Documentation Packing Annexure List of Abbreviations Page 6 of 38 Page Number 13 14 17 19 21 22 33 33 38 38 39 40 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT GOVERNMENT OF INDIA MINISTRY OF RAILWAYS RAILWAY BOARD INDIAN RAILWAY STANDARD SPECIFICATION FOR SAFETY AND RELIABILITY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT DRAFT Serial No RDSO SPN 144 2014 0 0 FOREWORD 0 1 This specification is issued under the fixed serial no RDSO SPN 144 followed by the year of original adoption as standard or in the case of revision the year of last revision 0 2 This specification requires reference to the following Indian Railway Standards specifications IRS Indian Standards Specificati
7. Isolation shall be provided between the final stage fail safe signalling relay and the electronic device preceding it The DC power supply shall not have any galvanic connection with the coil of the final stage signalling relay All electronic equipment shall have a Mean Time Between Failures MTBF as specified in the relevant equipment specification Duplication of components and parts of equipment or modules may be resorted to for improvement of the reliability where necessary Where components parts modules are duplicated it is desirable that provision may be made for cross checking the performance of one set by the other set and vice versa Due consideration shall be given to the effects of faults in fail safe electronic equipment to allow open or short circuit or earthing conditions and variation in component values due to ageing replacement of faulty component with new components of specified tolerance etc Safety shall not be impaired as a result of multi terminal devices failing either open circuit short circuit or with partial short circuit between any pair of terminals or earthing Page 12 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 3 7 3 8 3 9 3 10 4 0 4 1 4 2 Special care shall be taken in the design of amplifier circuit to eliminate the possibility of self oscillation It is desirable
8. Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT Driving Rain test Water spray for 1 hour Condition After this test electrical parameters shall be monitored in addition to physical checks Bump test PCBs Modules units packed condition shall be ees to bump test as under No of ae Case 1 1000 10 ernie ee 2 4000 10 Peak acceleration After this test checks electrical parameters Shock test Pulse duration shall be monitored in to simulate the effect of 3 addition to physical shunting shock The equipment in operation shall be subjected to 3 successive shocks in each direction of three mutually perpendicular axes of the specimen 18 shocks of such nature that the maximum acceleration is equal to 300 m s The corresponding duration of the nominal pulse shall be 18 ms At the end of the test the assembly shall be subjected to performance test as specified in relevant specification Vibration test Up to amp Over 75 including 75 Kgs weight 05 350 Hz IS 9000 Part XVI Test conditio n C a Yes Yes Yes Yes case 1 case 2 case 1 case 2 case 2 i ae IS 9000 Part VII Sec 2 IS 9000 Part VII Sec 1 TEC IPT 1001A revised or IS 9000 Part VIII as specified Page 24 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND REL
9. Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 9 0 9 1 9 2 It shall be possible to transmit the safety information over commercial voice channels twisted pair copper cable OFC cables through use of proper multiplexers unless other modes of transmission are specified by the purchaser The transmission protocol shall ensure required integrity of safety related information irrespective of transmission medium The overall system design must ensure that if the transmission link becomes inactive for more than a specified period the safety information drain user will assume a restrictive and fail safe state For systems relying on error prevention all transmission equipment such as filters and amplifiers must be designated to meet specified fail safety standards Errors introduced or not detected at a given level in the transmission system must be detected at higher levels Error detection methods used at any level must take into account the characteristics of the lower levels Error detection techniques should permit the use of standard telecommunication technology which offers much more economic solutions than the special hardware needed to implement error prevention techniques Error detecting coding should not form the sole means of protection of transmitted information but should be combined w
10. be made available to RDSO to check their conformity to the standards If the procedure and documentation for V amp V is considered inadequate RDSO reserves the right to get the verification and validation of software and hardware done by an independent agency at the cost of the supplier b Application Software It shall be containing the logic that defines how the inputs and outputs for a particular station are related This shall be station specific It shall not be possible to modify Executive Software However Application engineers should have the facility to modify application software as and when required It should be possible to prevent unauthorized access for modifying the application software through a password protection Page 19 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 7 1 7 2 7 3 7 4 7 5 7 6 7 7 8 0 The checksum of application software at the time of Factory Acceptance Test FAT matches with the checksum at the site SAT if there is no modification after FAT Software should be written in structured format It should be developed in such a way that it is possible to test and validate each module independently The software shall be written in such a manner that in case of variable data the possibility of using incorrect data does not exist Further the software should check and
11. differential mode voltage that appears between neutral amp earth in order to limit the harmful effects of lightning The IEC standards 61643 62305 pertaining to protection against lightning and surges shall apply for all electronic equipment to withstand static electricity electric fast transient and surge voltage The power line of electronic signalling equipment shall have Class B amp C type 2 stage protection in TT configuration Stage 3 protection is also required for protection of power signalling data lines Class B amp class C type protection devices shall preferably be pluggable type to facilitate easy replacement 11 3 Stage 1 Protection Power line protection at Distribution Level a The Stage 1 protection shall consist of coordinated Class B amp II C type SPDs at the entry point of input 230V AC supply in Power Equipment room in TT configuration in a separate wall mountable box The Class I B SPD shall be provided between Line to Neutral amp Neutral to Earth They shall be spark gap type voltage switching device and tested as per IEC 61643 with the following characteristics and features SN Parameters Limits Line amp Neutral amp Neutral Earth 1 Nominal Voltage Uo 230V 230V 2 Maximum continuous operating voltage U lt gt 255V gt 255V 3 Lightning Impulse current Imp 10 350us for gt 25 KA gt 50KA each phase 4 Response time T lt 100 s lt 100
12. in order to oxidize defective solder joints exposed through thermal stress 70 C 2 Hour 1 Hour soy Ambien wy 0 C Hour r The rate of rise fall of temp shall be minimum 10 C per minute In addition to physical checks the electrical parameters are also to be monitored after this test Power cycling The power supply modules shall be subjected to 60 ON OFF cycles for 1 hour The ON OFF switch usually provided in the modules may not be used for this purpose 9 4 Electromagnetic Interference and Electro Magnetic Compatibility 9 4 1 All equipments shall comply with IEC 62236 To protect against the electromagnetic interference the following should be ensured i Shielding at card level by providing a metallic plate over the cards The Metallic plate shall be earthed ii Shielding at chassis rack level iii Circuit design for minimum radiation Any cable will receive and radiate signals especially when it approaches a quarter wavelength or odd multiple thereof because it forms a resonant circuit However Page 26 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT iv v vi vii viii even when the cable does approach these lengths electromagnetic compatibility EMC can be a problem EMC filters EMC filters should be used for lines that carry
13. less than 3mm size covered with wire mesh for protection against entry of rodents lizards etc The protection shall conform to IP 31 type protection as specified in specification NO IEC 60034 Page 16 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 5 4 3 5 4 4 5 4 5 5 4 6 6 0 6 1 6 2 6 3 6 4 6 5 6 6 6 7 Rack shall be earthed as per the code of practice for earthing amp bonding for signalling equipments RDSO SPN 197 2008 The layout of the components and wiring shall be such that all parts are easily accessible for inspection repairs and replacement The AC input portion shall be clearly isolated and protected to prevent accidental contact Dummy slots for inserting spare PCBs shall be provided if space is available in the rack PRINTED CIRCUIT BOARD The PCB shall fulfil requirements of IEC 60255 and IEC 60352 5 PCB MATERIAL Material for the printed circuit board shall be copper clad glass epoxy of grade FR 4 or equivalent OUTLINE DIMENSIONS PCB shall normally be of standard size e g 3 4 6U BOARD THICKNESS The thickness of PCB cards and motherboard shall be as per currently available technology There should be no deformity in the PCB cards or the motherboard due to mounting of heavy components or due to ageing effect TRACK WIDTH The track width shall be 0 5 mm nomina
14. low frequency signals like Power input cables or other lines that carry status voltages to remove any high frequency components leaving the low frequency elements on the line that will not radiate much EMC filters should be placed at the entry point to the unit and should be tightly bonded to the chassis so that no signals can enter the unit and radiate into it prior to being removed by the filter Circuit partitioning The circuit should be segregated into EMC critical and non critical areas The critical or sensitive regions should be screened or and filters added as necessary at the interfaces to prevent EMI being radiated or to protect these circuits from the effects of EMI Grounding Thick wires should be used if possible and on printed circuit boards ground planes must be used Critical tracks must be run above the ground plane and they should be routed so that they do not encounter any breaks in the ground plane Sometimes it is necessary to have a slot or break in a ground plane and if this occurs a critical track must be routed over the plane even if it makes it slightly longer Screened Enclosure Placing the unit in a conductive enclosure that is grounded will significantly improve the performance Where cost and possibly aesthetics are important it is possible to spray the inside of cabinets with conductive paint although the level of screening provided will not be nearly as good as if a fully conductive metal case is used
15. point where power supply enters PC board Connectors Connectors used should generally conform to IEC 60130 Connectors used should be chosen considering the following Contact resistance Insulation between pins Ruggedness and resistance to vibration Resistance to entry of water or other contaminants Resistance to pressure Reliability vii Lifetime number of connect disconnect operations before failure viii Ease of connecting and disconnecting ix They should be keyed to prevent insertion in the wrong orientation connecting the wrong pins to each other and have locking mechanisms to ensure that they are fully inserted and cannot work loose or fall out Page 15 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT x xi xii 5 3 5 3 1 5 3 2 5 3 3 5 3 4 5 4 5 4 1 5 4 2 Connectors that apply power should be designed such that certain pins make contact before others when inserted and break first on disconnection to protects circuits Connector should be easy to identify visually rapid to assemble require only simple tooling Connectors used at radio frequencies must not change the impedance of the transmission line of which they are part A radio frequency connector must not allow external signals into the circuit and must prevent leakage of energy out of the circu
16. reject a Use of data which is obsolete or meant for some earlier state of the system and b Corruption of the data As far as possible program flow should be independent of the input data The program should preferably execute the same sequence of instructions in each cycle The use of interrupts should be kept to a bare minimum SELF CHECK PROCEDURES Software should include self check procedures to detect faults in the hardware The self check should include the following procedures i Memory containing the vital software and data should be checked periodically so that probability of corrupted software jeopardizing the safety of the equipment is minimized ii Components of the CPU such as general purpose registers program counters stack pointers instruction register instruction decoder ALU etc should be checked periodically as far as practicable Self check of the associated functional hardware as required by the hardware design should be performed periodically Critical and non critical software should be segregated in the memory area so that special procedures to check the program flow may be adopted during the self check process for the critical software TRANSMISSION OF SIGNALLING INFORMATION In the systems requiring transmission of vital safety the following requirements shall be fulfilled in addition to the requirements of EN 50129 amp IEC 62280 Page 20 of 38 Effective from 02 2014
17. 61000 4 5 Surge immunity test The surge test is applicable to products which are connected to networks leaving the building or mains in general Test according to IEC 61000 4 6 Immunity test to conducted disturbances induced by radio frequency fields Page 29 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT In general the conducted immunity test is applicable to products where radio frequency fields are present and which are connected to mains or other networks signal or control lines 9 4 4 8 Test according to IEC 61000 4 7 General guide on harmonics and interharmonics measurements and instrumentation for power supply systems and equipment connected thereto This technical report defines the measurement method of harmonics and interharmonics 9 4 4 9 Test according to IEC 61000 4 9 Pulse magnetic field immunity test This test is mainly applicable to products to be installed in electrical plants for example Tele control centres in close proximity to switchgear 9 4 4 10 Test according to IEC 61000 4 10 Damped oscillatory magnetic field immunity test This test is mainly applicable to products to be installed in high voltage substations 9 4 4 11Test according to IEC 61000 4 11 Voltage dips short interruptions and voltage variations immunity test This document defines the test methods to evaluate the immunity
18. C 80 C 95 RH 8 Mounted on Din rail Din rail Stage 3 protection Protection for Power signallin data lines All external Power signalling data lines AC DC shall be protected by using preferably pluggable stage 3 surge protection devices which consists of a combination of varistors suppressor diodes and GD tube with voltage and current limiting facilities 11 5 1 Power line Protection Class D The device for power line protection shall be of Class D type This shall have an indication function to indicate the prospective life and failure mode to facilitate the replacement of failed SPDs This shall be thermal disconnecting type and equipped with potential free contact for remote monitoring This protection shall be in compliance to IEC 61643 with following characteristics Nominal Voltage Uo 24V 48V 60V 110V 230V Max continuous operating 30V 60V 75V 150V 253V voltage Uc Rated load current I1 16A 16A 16A 16A 16A Nominal discharge current gt 700A 2700A 2700A 2 0KA 22 5KA In 8 20 us Max discharge current Imax 22KA gt 2KA gt 2KA_ gt 5KA gt 5KA 8 20 us Voltage protection level Up lt 200V_ lt 350V lt 500V lt 700V_ lt 1100V Response time T lt 25 fs lt 25fAs lt 25 s lt 25 s lt 25 fis Note Minor variations from above given parameters shall be acceptable 11 5 2 Signalling Data line protection These dev
19. IABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 6 mm 6 mm constant constant displacemen displacemen t or 15m t or 15m Sec Sec constant constant acceleration acceleration Total 105 min durati on If 10 min at 10 min at resona each each nce is resonant resonant observ freq freq ed Condit After this test electrical ion parameters shall be monitored in addition to physical checks Reference Electronic Equipment Indoor Out door On board Outside Cab Environmental Stress Screening tests ESS for Printed Circuit Boards PCB amp sub systems The manufacturer shall carry out the following ESS tests on all modules on 100 basis except bump test during production testing in the sequence as follows Suitable records shall be maintained regarding the compliance of these tests Page 25 of 38 Yes Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT Thermal cycling The PCBs shall be subjected to thermal cycling as per the procedure given below The assembled boards are to be subjected to rapid temperature cycling as mentioned below in the power off condition This temperature cycling from 0 C to 70 C 12 Hours at each temperature for 9 cycles and 1 hour at each temp for the 10 cycle Dwell time of 1 hour is provided for the last cycle
20. QUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT AMENDMENTS Version Chapter Amendment Effective date Annexure RDSO SPN 144 94 FIRST ISSUE 1994 RDSO SPN 144 2004 Revision 1 25 05 2004 RDSO SPN 144 2006 Revision 2 14 03 2006 RDSO SPN 144 2014 Revision 3 2014 Page 4 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT Revision 3 Details Type of SN Clause Amendment 1 0 2 Modified 2 0 3 Modified 3 0 4 Modified 4 1 1 Modified 5 2 2 2 4 2 5 Modified 6 2 7 1 2 7 2 2 7 3 Modified 7 2 7 6 Added 8 2 8 1 2 8 2 2 8 4 2 8 5 Modified 9 3 0 3 1 3 4 Modified 10 4 1 4 4 4 7 4 8 4 9 Modified 11 5 1 1 5 1 2 5 1 3 5 1 4 Modified 12 5 2 Modified 13 5 3 4 Modified 14 5 4 2 Deleted 15 5 4 3 5 4 4 Modified 16 6 0 6 1 6 2 6 6 6 10 6 11 6 12 Modified 17 7 0 7 2 Modified 18 8 0 8 1 Modified 19 9 3 Modified 20 9 3 1 9 3 2 9 3 3 9 3 4 9 3 5 9 3 6 9 3 7 9 3 10 9 3 11 9 3 12 Modified 21 9 4 Modified 22 9 4 1 9 4 2 9 4 3 9 4 4 Added 23 9 7 Added 24 10 2 10 3 10 4 Modified 25 11 2 11 3 11 4 11 5 1 11 5 2 Modified 26 12 0 12 3 12 4 Modified 27 13 1 13 6 Modified 28 15 Deleted 29 Annexure I Added Page 5 of 38 Effective from
21. ally function operate within limits In cases where the sealed equipment component is opaque electrically the equipment component should function operate within limits POWER SUPPLY REQUIREMENTS The equipment shall work on nominal voltage 24V DC 20 30 power supply or as specified in the relevant equipment specification or as approved by the purchaser Where separate DC DC converters are used to derive the required DC voltages from the DC main input these should conform to IRS S 96 for DC DC converters Page 31 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 10 3 10 4 11 0 11 1 11 2 If the equipment has a separate Battery Charger the battery shall be used in float charge mode from the AC mains at 230V The battery charger shall be of low ripple voltage output type as specified in IRS S 86 for axle counter A line surge suppresser MOVRs on input side shall be provided in the battery charger to protect against transient voltages spikes etc For chargers meant for Telecom Axle Counter El applications RFI EMI filters shall also be provided both on input amp output sides LIGHTNING AND SURGE PROTECTION FOR ELECTRONIC SIGNALLING EQUIPMENTS The equipment shall be suitably protected against atmospheric voltage surges both for common mode voltage that appears between phase conductors and earth and
22. ation 31 RFI Radio Frequency Interference 32 PROM Programmable Read Only Memory 33 QA Quality Assurance 34 SAT Site Acceptance Test 35 S amp T Signalling and Telecommunication 36 SCR Silicon Controlled Rectifier 37 SMD Surface Mount Technology 38 SPD Surge Protection Device 39 SSI Solid State Interlocking 40 UHF Ultra High Frequency 41 V amp V Verification and Validation Page 38 of 38
23. ces is lt 1 5 KV As such these devices shall be from the same manufacturer and necessary test certificate in this regard shall be submitted by the manufacturer supplier Stage 2 protection at the output side inside the distribution panel The Stage 2 protection shall consist of Class II C type SPDs for 224V 110V AC DC supplies at the output side inside the rack of equipment These shall be provided for External circuits The Class II C type SPD shall be a single compact varistor of proper rating and in no case a number of varistors shall be provided in parallel It shall be voltage clamping device and thermal disconnecting type They shall be tested as per IEC 61643 with the following characteristics and features SN Parameters Limits between L1 amp L2 L1 amp E L2 amp E 1 Nominal Voltage U0 60V 110V AC DC 24V 60V AC DC 2 Maximum continuous 2150 AC 275 AC operating voltage Uc gt 200 DC gt 100 DC 3 Nominal discharge gt 10KA gt 10KA current 8 20ms In 4 Maximum discharge gt 40KA gt 40KA Page 33 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 11 5 current 8 20ms Imax 5 Response time Tr lt 25 fs lt 25 s 6 Voltage protection lt 1 0 KV lt 0 5 KV level Up 7 Operating temperature 25 C 80 C 95 25
24. e discharge test should be 9 4 4 2 9 4 4 3 9 4 4 4 9 4 4 5 9 4 4 6 9 4 4 7 carried out on individual card module also Pantograph Interference Test One prototype of the equipment shall be installed in the actual field condition in AC electrified traction area An AC electric loco shall be placed in a position on the track such that distance between nearest face of the equipment and point of catenary where pantograph is touching is about 4 0 meters The equipment shall be tested for its normal working during raising and lowering of the pantograph This test will be repeated for sufficient number of times The equipment will be tested for its normal operation after completion of the test Test according to IEC 61000 4 2 Electrostatic discharge immunity test In general the electrostatic discharge test is applicable to all equipment which is used in an environment where electrostatic discharges may occur Direct and indirect discharges shall be considered Test according to IEC 61000 4 3 Radiated radio frequency electromagnetic field immunity test In general the radiated immunity test is applicable to all products where radio frequency fields are present Test according to IEC 61000 4 4 Electrical fast transient burst immunity test In general the fast transient test is applicable to products which are connected to mains or have cables signal or control in close proximity to mains Test according to IEC
25. ective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 12 2 12 3 12 4 13 0 13 1 13 2 13 3 13 4 13 5 13 6 13 7 13 8 13 9 14 0 All markings indications shall be placed in the vicinity of the components to which these refer and shall not be placed on removable parts if these parts can be replaced in such a way that the marking indications can become misleading The words Indian Railway Property shall be etched engraved screen printed or embossed on the equipment at a conspicuous position For it the size of the letters shall be chosen depending upon the equipment but shall not be less than 20mm high in any case The following information shall be engraved on the anodized name plate firmly attached to the equipment a Name or trademark of the manufacturer b Specification number c Serial number of the equipment d Installation for which meant e Month and year of manufacture f Version number g Equipment Name DOCUMENTATION Two copies of the following manuals shall be supplied System description manual and Instruction Manual Installation and Maintenance Manual including Dos amp Don ts Mechanical drawings of each sub system rack Guaranteed performance data technical amp other particulars of the equipment Schematic block diagram showing mounting arrangement of various compo
26. em reset switch must have a locking arrangement to prevent unauthorised operation All vital relays including the safe shutdown relays shall be of approved type for use in railway signalling Page 14 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 5 0 5 1 5 1 1 5 2 i ii iii iv v vi HARDWARE COMPONENT TYPES ICs and other components used in the equipment shall be of such grade that these can work satisfactorily in 40 to 85 C temperature range Capacitors used should be certified for at least 105 deg C Source of procurement of components shall be given in the Quality Assurance Plan Discrete components like diodes transistors SCRs etc should conform to HIREL program of CDIL or equivalent All resistors and rectifiers used shall be rated for at least double the power which is supposed to be dissipated in them The voltage rating of the capacitor shall be at least 50 above peak value The resistors and capacitors shall be of tolerances not more than 5 Where ICs are used all power supplies on cards should be locally de coupled using a capacitor with good high frequency characteristics The value of chip decoupler ceramic capacitor shall be 0 1 to 1yF The value of printed circuit board decoupler electrolytic capacitor shall be 10 to 100 uF and this capacitor should be placed near to the
27. ge and stamped with RDSO s seal before the same are dispatched to the consignee for installation The Page 11 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 2 8 6 3 0 3 1 3 2 3 3 3 4 3 9 3 6 version number and the checksum will be clearly typed or written on the sealed cover and signed by the inspecting authority Firms shall supply and install only the latest approved version of the equipment and software REQUIREMENTS OF SIGNAL ENGINEERING MANUAL The equipment and its accessories shall comply with relevant Para of Signal Engineering Manual pertaining to signalling circuits using electronic equipment The extract of relevant Para s is reproduced below Component failure shall be self detecting by way of causing a signal to display a most restrictive aspect Failure of components which are not self detecting shall not cause any unsafe failure of the equipment Even simultaneous failures in different components which are not self detecting shall not cause any unsafe failure of the equipment All fail safe circuits shall work on continuous energisation principle such that open circuits in wiring relay contacts etc or loss of power supply shall not cause unsafe conditions Common return shall not be used for vital circuits In vital circuits the final stage shall use fail safe signalling relays
28. ices shall preferably have an indication function to indicate the prospective life and failure mode to facilitate the replacement of failed SPDs If the device has any component which comes in series with data signalling lines the module shall have make before break feature so that taking out of pluggable module does not disconnect the line This protection shall be in compliance to IEC 61643 with the following characteristics Page 34 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT Nominal Voltage Up 5V 12V 24V 48V Arrester Rated Voltage Uc 6V 13V 28V 50V Rated load current I gt 250mA gt 250mA gt 250mA gt 250mA Total discharge current 8 20 us 20KA gt 20KA gt 20KA_ 20KA In Lightning test current 10 350 us gt 2 5KA_ 22 5KA 22 5KA gt 2 5KA Voltage protection level Up lt 10V lt 18V lt 30V lt 70V Note Minor variations from above given parameters shall be acceptable 11 5 3 If power supply data signalling lines AC DC are carried through 11 6 11 7 11 8 11 9 11 10 12 0 12 1 overhead wires or cables above ground to any nearby building or any location outside the equipment room additional protection of Stage 2 Class C type shall be used at such locations for power supply lines and Stage 3 protection for signal data line
29. idually packed to prevent damage IK KOK OK OK KK KK Page 37 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT Annexure I List of Abbreviations SN Abbreviation Full Form 1 AC Alternating Current 2 AFTC Audio Frequency Track Circuit 3 ALU Arithmetic Logic Unit 4 CDIL Continental Device India Limited 5 CENELAC European Committee for Electro technical Standardization 6 CPU Central Processing Unit 7 DC Direct Current 8 ESD Electrostatic Discharge 9 EMU Electrical Multiple Unit 10 EMI Electromagnetic Interference 11 EMC Electromagnetic Compatibility 12 EPROM Electrically Programmable Read Only Memory 13 FAT Factory Acceptance Test 14 GD Gas Discharge 15 HIREL High Reliability 16 IC Integrated Chip 17 IEC International Electrotechnical Commission 18 IP Internet Protocol 19 IPS Integrated Power Supply 20 IRS Indian Railway Standards 21 IS Indian Standards 22 ISO International Organization for Standardization 23 LCD Liquid Crystal Display 24 LED Light Emitting Diode 25 MTBF Mean Time Between Failure 26 MTBWSF Mean Time Between Wrong Side Failure 27 OEM Original Equipment Manufacturer 28 OFC Optical Fibre Communication 29 PCB Printed Circuit Board 30 RDSO Research Design and Standards Organis
30. ing particles like metal clips and filings e Accidental short circuit by dropped tools fasteners etc f Abrasion damage and g Vibration and shock to a certain extent The solder masks shall be applied on the solder side and component side of the card Following description shall be etched screen printed on the component side of the PCB i Component outline in the proximity of the component ii Manufacturer s name iii PCB name iv Equipment name v Part number Following description shall be engraved etched screen printed on the PCB i The manufacturing serial number ii Month and year of manufacture iii Version number Printed circuit cards shall be fitted with gold plated Euro D type CPU Type plug in connectors with locking arrangement Mechanical arrangements e g a clip or a screw to hold the PCB in inserted position shall be provided Screws should be countersunk and held on PCB when it is pulled out The PCB shall be mechanically polarized so that it is not possible to insert the PCB into wrong slot Page 18 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 6 13 6 14 7 0 HEAT DISSIPATING COMPONENTS All components dissipating 3W or more power shall be mounted so that its body is not in contact with the board unless a clamp heat sink or other means are used for prope
31. ion signalling and processing systems Software for railway control and protection systems IEC 62425 Railway Applications Communication signalling and processing systems Safety related electronics systems for Signalling IEC 62280 Railway Applications Communication signalling and processing systems Safety related communication Part 1 and 2 IEC 62427 Railway Applications Compatibility between rolling stock and train detection system IEC 61000 Testing and measurement techniques IEC 60255 Measuring relays and protection equipments IEC 60352 5 Press in connections General requirements test methods and practical guidance IEC 60130 Connectors IEC 61508 Standard for Functional Safety of Electrical Electronic Programmable Electronic Safety Related Systems EN 50126 Railway applications specification and demonstration of reliability availability maintainability and safety EN 50128 Railway applications signaling and communication Page 8 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 0 3 0 4 1 0 1 1 1 2 1 3 2 0 2 1 2 2 2 3 2 4 Software for Railway control and protection system xxvii EN 50129 Railway applications Safety related electronic systems for signaling xxviii EN 50159 1 amp 2 Railway applications Signaling and Communication Safety related communicati
32. it At UHF and above silver plating of connectors should be used to reduce losses DIAGNOSTIC FACILITY In case of microprocessor based equipment the system shall be provided with a front panel alpha numeric LED LCD display unit indicating various failures The error code should indicate type of the failure A trouble shooting chart should be provided indicating the action required to be taken for repair of the equipment corresponding to each error code Audiovisual alarm shall be provided to indicate failure The audio alarm should stop when acknowledged but the visual alarm should continue till the fault is rectified Equipment should have event logging facility along with networking capability to download the log from either local or a remote place Equipment should have a port with suitable protocol to be interfaced with Datalogger equipment for diagnostic purposes HOUSING RACK 19 rack mountable and 3 4 6U high cabinets made of aluminum of minimum thickness 2mm shall be used for housing the PCB cards The cabinet shall be powder coated The front amp backsides of the cabinets shall have facility for completely locking the equipment The rack should have provision for natural ventilation If required provision for forced cooling shall be made The equipment shall be housed in a rack with a transparent front panel if required The rack shall have provision for natural ventilation Ventilation openings shall be louvers of
33. ith other methods such as higher level procedures and protocols and hardware redundancy or diversity Forward error correcting coding should not be used unless precautions are taken at the higher level to prevent invalid corrections from being accepted at the higher level ENVIRONMENTAL CLIMATIC REQUIREMENTS The equipment shall be capable of working in non air conditioned environment in the field The equipment shall be suitable for installation on AC DC electrified and non electrified sections It shall be suitable in all areas including where locomotives having thyristor controlled single phase or 3 phase induction motors haul passenger or freight trains and where chopper controlled EMU stocks are operated Page 21 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 9 3 The equipment shall meet the following climatic and environmental requirements unless otherwise specified in the relevant specification and as per the IS or equivalent IEC standards Electronic Equipment Out door On board On Track Inside Outsid Track side Change of temp test Yes Yes Yes Yes Yes Low temp 10 C 3 C High temp 70 C 2 C Rate of 1 C min change in 0 2 C temperatur e Duration 3 hrs at each temp 10 C amp 70 C 2 or as otherwise specified Condition Fully functional during test
34. l In no case it should be less than 0 3 mm Lesser width for use of SMD technology may be considered SPACING BETWEEN TRACKS Spacing between tracks shall be 0 5mm nominal and in no case it shall be less than 0 3 mm Lesser spacing for use of SMD technology may be considered The printed circuit cards shall be specifically designed to suit the circuitry used and no extra wires or jumpers shall be used for interconnection of components on the PCB No piggy back PCB shall be connected to any PCB unless otherwise specified The components shall be soldered with wave soldering machine Any exception to wave soldering machine shall have specific approval of RDSO Lucknow The cards shall be provided with testing points and the corresponding voltages waveforms shall be indicated in the fault diagnostic procedure and service manual to facilitate testing and fault tracing Page 17 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 6 8 6 9 6 10 6 11 6 12 CONFORMAL COATINGS Assembled amp tested printed boards should be given a conformal coating to enable them for functioning under adverse environmental conditions The coating material should be properly chosen to protect the assembly from the following hazards a Humidity b Dust and dirt c Airborne contaminants like smoke and chemical vapours d Conduct
35. l this test is applicable for d c input power ports 9 4 4 16Test according to IEC 61000 4 30 Measurements of power quality 9 5 9 6 9 7 10 0 10 1 10 2 parameters This standard gives clarification on the measurement of power quality parameters Insulation Resistance Test This test shall be carried out a Before the high voltage test b After the high voltage test c After completion of the climatic test There shall be no appreciable change value more than 10 Mega ohms and variation within 10 in the values measured before and after high voltage test After the completion of climatic test the values shall not be less than 10 Mega ohms for the equipment at a temperature of 40 C and relative humidity 60 The measurement shall be made at a potential of 500V DC Applied High Voltage Test The equipment shall withstand for one minute without puncture and arcing a test voltage of 2000 volts rms applied between a AC line terminals and earth b DC line terminals and earth The test voltage shall be alternating of approximately sinusoidal wave form of any frequency between 50 Hz and 100 Hz Printed circuit cards shall be removed Hermetic Sealing Test The equipment component is to be subjected to Dust Test and Driving Rain Test as per para 9 3 7 and 9 3 9 of this specification After the tests the equipment should not show traces of water vapour or water inside the seal if visible and should electric
36. ndition but which in combination with a second or subsequent failure could result in an unsafe condition then the design of the equipment must be such that the first failure is detected and negated The probability of occurrence of a second failure while the first failure has not been detected and negated should be negligible The design of the equipment shall cater for detection and restoration of system to a safer state in case of following faults if these are likely to result in unsafe condition Variation in power supply beyond its tolerance limits including its momentary or prolonged failure Spikes in the power supply system stray fields caused by traction vehicles or standby diesel generator sets Insertion of PCBs in wrong card slots Earthing of any component or wire or a combination of such earthing faults and Broken wires damaged or dirty contacts failure of a component to energise loss of power supply or blown fuses etc The equipment shall be so constructed as to prevent unauthorized access Whenever power of the equipment is switched on the equipment should wait for a manual system reset before assuming normal operational mode unless otherwise as specified in relevant specification This may or may not be applicable in Software embedded systems Manual reset switch if provided must have an non resettable electro mechanical counter which should be incremented every time a reset operation is performed Syst
37. nducted immunity Radiated immunity ESD immunity Transient immunity Surge immunity The system operation and its safety should not be affected by EMI EMC issues for which the following tests should be conducted on the equipment and as specified in the relevant specification of the equipment EMI encountered in 25 KV AC electrified areas For those outdoor equipment which are used in 25 KV AC electrified areas and whose working is susceptible to the effect of electrostatic and electromagnetic induction the following tests 9 4 4 1 and 9 4 4 2 may be performed as given in relevant specification One sample of the test equipment shall be subjected to static discharge test as per IEC 61000 4 2 8KV test voltage is to be taken unless otherwise specified in the relevant specification Methodology of test is given below a The equipment shall be functional and the chassis of the equipment shall be firmly grounded Page 28 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT b A charged capacitor of 8 KV should be discharged by touching the chassis by testing probe through 3309 resistance and 150 pF capacitor c The above discharge test should be repeated minimum 3 times d NA After completion of the test the equipment shall be able to continue its normal operation e If given in the relevant specification th
38. nents amp details of each type of assembled PCB Trouble shooting procedures along with test voltages and waveforms at various test points in the PCBs The possible error codes and thereafter actions required should be mentioned in the maintenance manual Details of software viz Source code algorithm flow chart machine code along with test validation procedure used and the results thereof Details of Hardware e g schematic diagrams of the system circuits components details for each type of assembled PCB and part list Pre commissioning check list PACKING Page 36 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 14 1 The equipment and its sub assemblies shall be wrapped in bubble sheet and then packed in thermo Cole boxes and the empty spaces shall be filled with suitable filling material All PCBs shall be enclosed in anti static shield cover 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 14 2 Each box shall be marked with code numbers contents and name of manufacturer The upside shall be indicated with an arrow Boxes should have standard signages to indicate the correct position and precaution Handle with Care with necessary instructions 14 3 Printed circuit boards shall be separately and indiv
39. of an equipment connected to the LV system to voltage dips short interruptions and voltage variations This test is applicable to equipment with a rated input current of less than 16 A per phase connected to a c mains 9 4 4 12Test according to IEC 61000 4 14 Voltage fluctuation immunity test In general voltage fluctuations have an amplitude not exceeding 10 therefore most equipment is not disturbed by voltage fluctuations However this test may be applicable to equipment intended to be installed at locations where the mains have larger fluctuations 9 4 4 13Test according to IEC 61000 4 17 Ripple on d c input power port immunity test This test applies to equipment connected to d c distribution systems with external batteries charged during the operation of the equipment 9 4 4 14Test according to IEC 61000 4 28 Variation of power frequency immunity test In general the test for variation of the power frequency is not applicable However it may apply to equipment intended to be installed at locations where the power frequency has large variations for example equipment connected to an emergency power supply 9 4 4 15Test according to IEC 61000 4 29 Voltage dips interruptions and voltage variations on d c input power ports immunity tests Page 30 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT In genera
40. on in closed and open transmission system Whenever in this specification any of the above mentioned specifications are referred to by number without mentioning the year of issue the latest issue of that specification is implied otherwise particular issue referred to is meant This specification is intended chiefly to cover only the technical provisions and does not include all the necessary provisions of a contract SCOPE This specification covers the reliability and safety requirements of electronic including microprocessor micro controller processor based fail safe signalling equipments like Axle Counters AFTCs Electronic Interlocking Equipments SSBPAC UFSBI TCAS TPWS IPS DC DC converters LED signals Power supply equipments Telecom eqipments etc This specification shall be read with the main specification of the equipment Any special requirement specified in the main specification of the equipment shall override the requirements laid down in this specification GENERAL The equipment shall be manufactured as per best engineering practices The cabinet shall be powder coated and shall have good aesthetic appearance It shall conform to IP 31 class of protection as specified in IEC 60034 The power portion of the equipment shall be clearly isolated and protected to prevent accidental contact All non current carrying metals parts including shields and screens shall be bonded together and earthed An ea
41. onic systems for signaling EN 50159 Railway applications Signaling and Communication Safety related communication in closed and open transmission system IEC 61508 Standard for Functional Safety of Electrical Electronic Programmable Electronic Safety Related Systems amp IEC 62278 The Specification And Demonstration of Reliability Availability Maintainability and Safety RAMS IEC 62279 Communication signalling and processing systems Software for railway control and protection systems IEC 62425 Communication signalling and processing systems Safety related electronics systems for Signalling and IEC 62427 Compatibility between rolling stock and train detection system The system shall be designed on fail safe principles In case of any failure whether in the hardware software or any part of the equipment Page 13 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 4 3 4 4 4 5 i ii iii iv v 4 6 4 7 4 8 4 9 the system and the equipments controlled by it should fail on the safe side and the system should change over to a more restrictive state No single failure shall result in an unsafe condition i e the system shall be brought to a safe state as soon as a failure occurs It must be ensured that if a failure of equipment occurs which by itself does not result in unsafe co
42. ons IS European Committee for Electrotechnical Standardization CENELEC and International Electrotechnical Commission IEC i IRS S 96 for DC DC converters ii IRS S 88 for Low maintenance Lead Acid Batteries iii IRS S 93 for Valve Regulated Lead Acid Batteries iv IRS S 86 for battery chargers v IS 9000 for Basic Environmental Testing procedure for electronic and electrical items vi IS 9001 Guidance for Environmental Testing vii IEC 60034 for Degrees of protection viii IEC 60947 7 1 terminal blocks for copper conductors Page 7 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT ix x xi xii xiii xiv xv xvi xvii xviii xix xx xxi xxii xxiii xxiv xxv xxvi IEC 60571 Railway Applications Electronic Equipment used on rolling stock IEC 61643 Low voltage surge protective devices IEC 62305 Protection against lightning IEC 62236 Railway Applications Electromagnetic compatibility Part 1 to 5 IEC 62497 Railway Applications Insulation Co ordination Part 1 to 2 IEC 62498 Railway Applications Environmental conditions for equipments part 1 to 3 IEC 62278 Railway Applications The Specification And Demonstration of Reliability Availability Maintainability and Safety RAMS IEC 62279 Railway Applications Communicat
43. r heat dissipation The distribution of the power supply on the cards should be such that different voltage tracks 0 5V etc follow the same route as far as possible The track of power supplies should be as thick and wide as possible SOFTWARE REQUIREMENTS Software should have been developed in conformity with a software engineering standard issued by recognized standards body such as CENELEC with special relevance to safety critical applications The system should generally satisfy requirements of EN 50128 Railway applications signaling and communication Software for Railway control and protection system Particular software engineering standards used shall be specified and one complete set of such standards shall be made available to RDSO The software of system should generally have two layers a Executive Software or System Software This Executive Software shall define what the system can do and how the various parts of the system operate together It shall include all start up and operational safety tests including checking the Executive Software itself that are the parts of the processor for continual assurance of safety operation The executive Software should have been independently verified and validated As specified in the software Engineering Standards full documentation on Quality Assurance Program specially the Verification and Validation V amp V procedures carried out in house or by any independent agency should
44. rth terminal suitable for taking up to 4 mm diameter copper wire shall be provided The earth terminal Page 9 of 38 Effective from 02 2014 Specification no RDSO SPN 144 2014 Revision 3 SAFETY AND RELIABILTY REQUIREMENT OF ELECTRONIC SIGNALLING EQUIPMENT 2 5 2 6 2 7 2 7 1 2 7 2 2 7 3 2 7 4 shall be indicated by letter E Value of earth resistance shall not be more than 1 ohm unless otherwise specified Outsourcing if any of any sub modules or PCB shall be indicated in the Quality Assurance Plan and approval of RDSO Lucknow shall be obtained Outsourcing of safety related sub modules or PCBs shall be from ISO 9001 or ISO 9002 certified manufacturers only Necessary provision shall be made in the hardware and software for modular expansion of the equipment Version Control For indigenous equipments the version number of equipment shall be as per the format given below DXXSXXXHXX DXX SXXX HXX Basic Design Software Hardware D Design S Software H Hardware XX and XXX are numeric two and three digit numbers respectively Thus the initial version of any equipment will be D01S001H01 In every case of modification upgradation improvement of Basic Design DXX will increment by one In every case of modification upgradation improvement of system Software executive software SXXX will increment by one In every case of modification upgradation improvement of
45. s Coordinated type Class B amp C arrestor shall be provided in a separate enclosure adjacent to each other This enclosure should be wall mounting type Length of all cable connection from input supply and earth busbar to SPDs shall be minimum possible This shall be ensured at installation time Stage 1 amp Stage 2 Class B amp C protection should be from the same manufacturer supplier Manufacturer shall provide Stage 1 amp Stage 2 protection Stage 3 protection shall be got provided by Railways separately The cross sectional area of the copper conductor for first stage protection shall not be lt 16 mm and for second stage shall not be lt 10mm Batch test report of OEM should be submitted by the manufacturer supplier of Lightning amp Surge protection devices to the IPS manufacturer at the time of supply of these devices Copy of the same shall be submitted by manufacturer to RDSO at the time of acceptance test of equipment MARKING All indigenous equipments shall meet the following requirement All markings indications shall be easily legible and durable Where the marking is by use of labels the labels shall be metallic and shall be firmly fixed and shall not be capable of being removed by hand Durability of marking shall be checked by rubbing the marking by hand with a piece of cloth soaked with petroleum spirit This requirement shall also be met after completion of climatic test Page 35 of 38 Eff
46. sed under Cross Approval the details of testing and display shall be indicated Change of system software The system software shall be stored in separate PROM to ensure that the ROM is programmed only once and it is not be possible to modify the System Software However application engineers shall have the facility to modify application software as and when required The application software shall be password protected and shall be accessed by authorized person only Any supply or installation of modified upgraded improved system software by a firm for equipment shall only be done with prior approval of Signal Directorate of RDSO Lucknow While approving the upgraded modified improved software with new version number RDSO shall verify the checksum of the system software as given by the manufacturer along with version number of the equipment The Director Q A S amp T will check the version number and also the checksum of new version of the software before passing the same in the acceptance test Version number and checksum of new version shall form part of approval letter acceptance and routine tests also After the acceptance test by Director Q A S amp T stickers with software version no will be written with non erasable and visible marker pen on the PROMs In case PROMS carrying new software version are to be supplied separately for replacing PROM s of already supplied equipment these will be sealed in a proper packa
47. that loss of safety requirements is not caused should the amplifier go into self oscillation due to any unforeseen contingency Where specific frequencies are used for safety circuits particular care shall be taken to ensure that the frequency generating equipment is producing only the desired frequency signal Verification shall be carried out using passive tuned filters in series with each frequency source The physical construction of fail safe equipment shall be designed to eliminate the possibility of external objects causing short circuits between combinations of terminals in vital circuits This may be achieved for example by adequate separation of terminals and by the fitting of protective shrouds where necessary For the consideration of the fail safe feature of an electronic safety signalling device failure of one component for all the modes of probable faults indicated in paragraph 3 6 one at a time shall be considered If the failure of the component under examination is not self detecting then simultaneous failure of other associated components shall be considered FAIL SAFETY REQUIREMENT The system should generally satisfy requirements of EN 50126 Railway applications specification and demonstration of reliability availability maintainability and safety EN 50128 Railway applications signaling and communication Software for Railway control and protection system EN 50129 Railway applications Safety related electr

RDSO/SPN/144 - Indian Railway

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