SCHEDULE-III (Volume-A) TECHNICAL
Contents
1. 232 e Spec HT TVM DLMS 299 3 36 MINIMUM TESTING FACILITIES The tenderer should have the necessary testing facility for carrying out the following tests i AC voltage test ii Insulation resistance test ili Test of limits of errors iv Test of meter constant V Test of starting condition vi Test of no load condition vii Repeatability of error test viii Test for power consumption ix Vibration test xX Tamper conditions as per purchaser specification Xi Shock test Notes a Manufacturer should possess fully computerized Meter Test Bench system for carrying out the relevant routine acceptance tests as well facility to generate Test Reports for each and every meter tested b Manufacturer should have duly calibrated Electronic Reference Standard ERS meter of class 0 05 accuracy or better Where testing facilities do not exist at the Supplier s Works for Shock and Vibration Testing as per the relevant standards these two tests may be carried out in accordance with the provisions of IS 13010 with latest amendments 3 37 TESTS The test reports certificate records for all type tests specified having been successfully performed on the type of the meter offered shall be submitted with the tender The bidder shall clearly bring out the deviations from this specification clause whether on account of tests or manufacturing process or features incorporated in the meter The tender lacking2. 3 14 MARKING OF METER The meter terminal marking and mounting arrangement should be as per Indian installation practices The marking on every meter shall be in accordance with IS 14697 1999 IEC 62052 11 2003 and annexure A 5 1 of the guideline issued by CPRI Banglore Every meter shall have nameplate beneath the meter cover such that the nameplate cannot be accessed without opening the meter cover and without breaking the seals of the meter cover and the nameplate shall be marked indelibly The nameplate marking should not fade or otherwise be adversely affected by UV exposure with lapse of time The TVMs shall have also marking of DLMS Meter purchase under RAPDRP on name plate 3 15 CONNECTION DIAGRAM amp TERMINAL MARKINGS The connection diagram of the meter shall be clearly shown for 3 phase 4 wire system as well as 3 phase 3 wire system with or without installation of 4 CT in neutral line on inside portion of the terminal cover and shall be of permanent nature The meter terminals shall also be marked and this marking should appear in the above diagram 3 16 SOFTWARES AND INTERFACE BETWEEN METER amp HHU Adequate number of licensed copies of the following software shall be made available and shall be installed in HHU and Base Computer System BCS by the Supplier without extra cost The Supplier shall impart necessary training regarding installation and use of the above softwares The exact quantity of each type of
3. iv All the information about tamper events should be accompanied with date and time stamping along with the snap shots details of the respective electrical conditions This information should be displayed in the sequence in which it happened in cumulative format as well as in summary format The cumulative format should segregate a particular tamper Spec HT TVM DLMS 116 information and summary report shall show count of tamper occurrence and the duration for which meter has remained under tamper condition v The BCS should be capable of preparing a available makes of HHUs to read the meter information or for Configuration Change activity in the meter after entering the password provided by SE M amp P Jaipur such as time setting Reactive Energy for Apparent Energy calculation re programming MD integration period change and TOD re programming changing TOD time zones subject to max 8 time zones and or change of any one or more TOD time zone timings in the meter c Support Display There should be user friendly approach for viewing meter data for the reading collected now or for the reading collected in the past All information about a particular consumer should be segregated and available at one place so that locating any consumer s past data is easy It should be possible to locate retrieve data on the basis of one of the following particulars i Consumer ID Number ii Meter Sr No iii Date of meter readin
4. when subjected to 200 hours on UV ageing test It should withstand 650 deg C glow wire test and heat deflection test as per ISO 75 c The manufacturer shall emboss on the base cover s the name of the material they have used in an abbreviated form e g PCFR 10 GF to denote that they have used polycarbonate flame retardant 10 glass filled polycarbonate d The window portion shall be of transparent unbreakable silicon coated scratch resistant surface UV stabilized polycarbonate material for easily reading all the displayed values parameters nameplate details and calibrating Spec HT TVM DLMS 6 LED It should not fade in course of time and become opaque causing inconvenience in reading The window portion shall be ultrasonically welded with the meter cover such that it cannot be removed undamaged without breaking the cover e The meter cover shall be ultrasonically welded with the meter base The sample meter to be sent along with bid may not be ultrasonically welded with the meter base as at the time of sample testing it has to be opened to ascertain conformity of meter as per specification However before commencement of supply sample has to be got approved with ultrasonically welded meter by the successful bidder xiii Terminal Block a The detachable terminal block shall be moulded type made of non hygroscopic flame retardant material having good dielectric and mechanical strength The moulded terminal block sha
5. software to be so supplied shall be intimated to the Supplier prior to at the time of ordering subject to maximum 30 Nos sets i Software for reading down loading meter data as well as configuration change activity in meter such as time setting reactive energy for apparent energy calculations reprogramming MD integration period change and TOD reprogramming changing TOD time zones subject to maximum 8 time zones and or change of Spec HT TVM DLMS 10 any one or more TOD time zone timings in the meter normally resident in the Hand Held Unit HHU Software suitable for MS Window XP or higher version 7he software shall be installed in and be compatible to all makes of the HHUs Analogic Sands any other make and PC Laptop as well as supplied separately in the form of floppies CDs ii Configuration change activity programming should be enabled at BCS under multilevel password protected security system for specified selected meter s identified by the meter serial number s Configuration change activity can only be possible after written consent of SE M amp P JVVNL Jaipur and a password available with SE M amp P Jaipur is to be entered first for enabling any configuration change activity Without entering the password provided by SE M amp P Jaipur configuration change activity shall not at all possible Such configuration change in the meter shall be immediately preceded automatically by meter data reading such that entire met
6. and routine tests specified in the relevant standards and this specification These limitations shall be very clearly brought out in a separate schedule of deviations from specified test requirements The successful bidder shall within 30 days of placement of order submit following information to the purchaser i List of raw materials as well as bought out accessories and the names of sub suppliers selected from those furnished along with offers ii Type test certificates of the raw materials and bought our accessories if required by the purchaser iii Quality assurance plan QAP with hold points for purchaser s inspection The quality assurance plan and purchasers hold points shall be discussed between the purchaser and bidder before the QAP is finalized The contractor shall operate systems which implement the following i Hold point A stage in the material procurement or workmanship process beyond which work shall not proceed without the documental approval of designated individuals or organizations The purchaser s written approval is required to authorize work to progress beyond the hold points indicated in quality assurance plans ii Notification Point A stage in the material procurement or workmanship process for which advance notice of the activity is required to facilitate witness If the purchaser does not attend after receiving documented notification in accordance with the agreed procedures and with the correct perio
7. be provided xv The meter shall have minimum three fixing holes one at the top and other two inside the terminal block The top hole shall be key hole type on the back of the meter base so that the hanging screw is not accessible after fixing of the meter and it shall not be possible to remove the meter from the hanging screw without removing the terminal cover and screw s from the terminal block Any alternate better arrangement shall also be considered for acceptance The lower fixing holes shall be provided under the extended terminal cover A set of fixing screws shall be supplied with each meter xvi Extended terminal block cover shall be provided to ensure that the internal parts are not accessible for tampering etc without breaking the seals The ETBC shall be Spec HT TVM DLMS extended by about 30 mm 5 mm below the terminal block A firm connection shall be established with in the meter case to energies the voltage circuit Arrangement for display optical port auxiliary supply source push buttons for manual mode meter nameplate and display sequence should be made in such a manner that it is accommodated in size of 170mm W x 140 mm H from opposite side of ETBC This is required for facilitating of fixing of the HT Tri vector meter in HT panel box 3 12 MANUFACTURING ACTIVITIES i The meter should employ latest technology such as Application Specific Integration Circuit ASIC to ensure reliable performance The mountin
8. line voltages currents etc minimum 5 parameters as per details given in the table below and enclosed annexure c Daily Load Profile Parameters such as cumulative energy kWh import export cumulative kVAh while kW import export cumulative energy kVArh as per details given in the table below and enclosed annexure In addition to above the meter shall also record the Name plate details programmable parameters readable as profile occurrence and restoration of tamper events along with the parameters Table A5 1 A5 2 and A6 1 to A6 8 respectively of enclosed guideline document Detail of category wise parameters requirement suitable for specific location such as feeder DT metering interface points boundary points is given in following tables of guidelines document enclosed as annexure As per guideline of CPRI Banglore Category Parameter group Annexure Table No Substation Feeder Distribution Instantaneous parameters A2 1 Transformer meter Block Load Profile parameters A2 2 Boundary Ring fencing Interface Instantaneous parameters A3 1 Meters Block Load Profile parameters A3 2 Daily Load Profile parameters 3 3 HT Consumer Meters Instantaneous parameters A4 1 Spec HT TVM DLMS 15 2 Block Load Profile parameters A4 2 Billing Profile parameters A4 3 Substation Feeder Distribution Name Plate details A5 1 Transformer Boundary Ring Programmable Parameters A5 2 fencing
9. obligation of furnishing the equipment in accordance with the specification and shall not prevent subsequent rejection if the equipment is found to be defective All acceptance tests including other special tests as given in this specification and inspection shall be gone at the place of the manufacturer unless otherwise especially agreed upon by the Bidder and Purchaser at the time of purchase The purchaser reserves the right to insist for witnessing the acceptance routine testing of the bought out items The supplier shall give 15 days advance intimation to enable the purchaser to depute his representative for witnessing the acceptance and routine tests Material shall be despatched only after getting the dispatch authorization from the purchaser or his authorized representative after successful inspection testing The bidder shall afford the inspectors representing the purchaser all reasonable facilities without charge to satisfy him that the equipment is being furnished in accordance with this specification during stage inspection if any and final inspection 3 43 NUMBER OF SAMPLES AND CRITERIA FOR CONFORMITY The recommended sampling plan and the criteria for acceptance of the lot shall be as per Annexure E of IS 14697 1999 for the type of meters covered in this specification 3 44 PACKING a The equipments shall be suitably packed in order to avoid damage or disturbance during transit or handling Each meter may be suitabl
10. of the meter shall not be affected by harmonics circulating in the system of magnitudes within permissible limits stipulated in relevant ISS IEC CBIP Standards and CEA Regulations 2004 The meter shall display energies as per CPRI guidelines and same shall be logged in meter memory and be capable to download at BCS end through HHU 3 27 SELF DIAGNOSTIC FEATURE The meter shall be capable of performing complete self diagnostic check to monitor the circuits for any malfunctioning to ensure integrity of data memory location all the time The meter shall have indications for unsatisfactory nonfunctioning malfunctioning of the following as per the requirement under Annex G 19 of IS 14697 a Time and date b Real Time Clock RTC battery Spec HT TVM DLMS 18 c All display segments d Non volatile memory The details of unsatisfactory non functioning malfunctioning of time and date should additionally be recorded in the meter memory and available for viewing at BCS end either directly or through comparison with CMRI date and time The details of self diagnostic capability feature should be furnished by the bidder 3 28 TAMPER AND FRAUD PROTECTION The meter shall atleast be immune to tampers elaborated in IS 14697 Annexure G 10 The meter should have features to detect the occurrence and restoration of at least the following common ways of tamper and fraud a Missing Potential The meter shall be capable of d
11. Interface HT Consumer Event Conditions A6 1 to A6 7 Meters Logging parameters for each of Capture parameters for A6 8 the event B DEMAND INTEGRATION PERIOD The maximum demand integration period may be set at 15 minute or 30 minute Meters shall be programmable for integration period of 15 30 minutes C MD RESET It should be possible to reset MD by the following a Auto reset at 24 00 hrs at the end of each billing cycle D COMMUNICATION CAPABILITY The meter shall be provided with two ports for communication of the measured collected data as per guideline document enclosed in the annexure i e a hardware port compatible with RS 232 and RS 485 specifications which shall be used for remote access through suitable Modem GPRS CDMA and an Optical port complying with hardware specifications detailed in IEC 62056 21 This shall be used for local data downloading through a DLMS compliant HHU The RS 485 port shall be used at Substations suitable for multi drop connections of the meter for exporting data to sub station data logger DCU Computer and the remote end server The RS 232 port shall be used at boundary points meters and Distribution Transformer meters capable to transfer and export data to the remote end server through suitable communication mediums GPRS CDMA Both ports shall support the default and minimum baud rate of 9600 bps E HAND HELD UNIT HHU To enable local reading of meters data a DLMS co
12. LING ARRANGEMENT OF THE METER Atleast two sealing screws shall be provided for proper fixing of meter cover so that access to the working parts shall not be possible without breaking the seals One screw provided on left side shall be used by manufacturer to provide his own sealing with high quality double anchor polycarbonate seal bearing laser etched monogram of JVVNL along with meter serial number and other provided on right side by Spec HT TVM DLMS 9 purchaser which should be left unsealed Provision shall also be kept for one no seal on terminal cover All the sealing screws shall be captive type so that they cannot be detached when they are in open condition The holes in the head of sealing screw shall be of min 2mm dia The sealing screws for meter base and cover shall be unidirectional and slotless 2 No Two No tamper indicative paper seal s on either side of the meter case shall be provided by the manufacturer For this at least two 2 Nos seals on meter body and provision for one 1 no seal on meter terminal cover and one 1 no seal on communication port shall be provided For the above sealing arrangement for the purchaser the manufacturer shall provide at least one seal on the meter body at the factory after calibration and testing Provision for all the seals should be provided on front side only Rear side sealing arrangement will not be accepted The Suppliers in their offer should explain the sealing arrangement
13. MRI for viewing at the BCS end These events shall be logged in a separate compartment on roll over first in first out basis Electrical values snap shots shall not be required for the logging of Power off Power on events xiv The HTTVM shall record active apparent energy in forward direction even if one or more CT s are reversed The current vector direction shall always be considered as positive import for the computation of 3 phase active energy which shall be added in the main active import energy register and KVAh computation Shall be based on reactive lag and lead energy xv The meter should be compatible to GSM GPRS CDMA technology for remote metering xvi The meter should be compatible to data exchange for electricity meter reading tariff load control as per guideline specification of CPRI Banglore Enclosed 3 18 DISPLAY OF MEASURED VALUES The measured value s shall be displayed on seven segments seven digits Liquid Crystal Display LCD display unit register having minimum character height of 8 mm LCD to be of STN super tested kneumatics type construction suitable for temperature 70 Deg C continuously The data should not be lost in the event of power failure and should be stored in non volatile memory The non volatile memory should retain data for a period of not less than 10 years under un powered condition i e the non volatile memory shall have a storage life without use of ten 10 years Batter
14. Spec HT TVM DLMS 1 TO SCHEDULE III Volume A TECHNICAL SPECIFICATION amp SCHEDULE OF REQUIREMENT FOR SUPPLY OF 3 PHASE 4 WIRE A C STATIC HT TRIVECTOR ENERGY METER OF CLASS OF ACCURACY 0 5S WITH DLMS PROTOCOL AS PER GUIDELINE OF CPRI BENGALURU 3 01 A SCOPE i This specification covers the design engineering manufacture assembly inspection testing at manufacturers works before despatch supply and delivery at site FOR destination anywhere in vicinity of Class 0 5S accuracy static HT Tri vector Meters with DLMS protocol for energy accounting audit metering boundary amp tariff purpose along with software and interface cable as per requirement given in this specification The HT Tri vector meter should be 3 phase 4 wire type suitable for connection to a 3 phase 4 wires as well as 3 phase 3 wire system The meter should be capable to record and display KWh KVArh KVAh and maximum demand in KVA for 3 phase 4 wire as well as 3 phase 3 wire AC balanced unbalanced loads for a power factor range of zero lagging through unity up to zero leading as per requirement given in this specification ii It is not the intent to specify completely herein all the details of the design and construction of material The material shall however conform in all respects to high standards of engineering design and workmanship and shall be capable of performing for continuous commercial operation in a manner acceptable to the pu
15. ading tariff and load control issued by CPRI Banglore 3 48 DELIVERY Supplies shall be commenced within 45 days from the date of approval of before commencement of sample and completed 25 of ordered quantity per month thereafter Pre commencement sample must be furnished within one month from the date of dispatch of purchase order failing which delay in delivery clause shall be applicable
16. anuals technical leaflets shall be supplied to each consignee for the first instance of supply One set of routine test certificate shall accompany each dispatch consignment The acceptance test certificates in case predespatch inspection or routine test certificates in cases where inspection is waived shall be got approved from the purchaser Spec HT TVM DLMS 28 3 46 SCHEDULES The tenderer shall fill in the following schedules which are part and parcel of the tender specification and offer If the schedules are not submitted duly filled in with the offer the offer shall be liable for rejection Schedule A II Guaranteed Technical Particulars of HTTVM All deviations from the specification shall be brought out in the schedules of deviations Schedule VI VII The discrepancies if any between the specification and the catalogues and or literatures submitted as part of the offer by the bidders shall also be brought out If it is observed that there are deviations in the offer in Guaranteed Technical Particulars other than those specified in the deviation schedules then such deviations shall be treated as deviations 3 47 GENERAL INFORMATION a Frequent changes in specifications during currency of contract will be avoided and if required the same shall be effected on mutually agreed basis b For any further query regarding DLMS protocol refer to guideline document for Data Exchange for Electricity meter re
17. brass terminals The terminals shall have suitable construction with barriers and transparent cover to provide firm and safe connections of incoming and out going leads The terminal screws shall have flat bottom so as not to pierce in the external conductors The terminals shall be of suitable rating to carry continuously Imax current and made of electroplated or tinned brass and shall be of replaceable type Any other provision which meets this requirement in a better manner way shall also be considered The bidder should elaborate the procedure adopted Spec HT TVM DLMS ope e i The manner of fixing the external conductors to the terminal block shall ensure adequate and durable contact such that there is no risk of loosening or undue heating Screw connections transmitting contact force and screw fixings which may be tightened and loosened several times during the life of the meter shall screw into the body of brass terminal All parts of each terminal shall be such that the risk of corrosion is minimized Two screws shall be provided in each current terminal for effectively clamping the external leads or thimbles Each clamping screw shall engage a minimum of three threads in the terminal The ends of screws shall not pierce and cut the conductors used Electrical connection shall be so designed that contact pressure shall not be transmitted through insulating materials If the manner of fixing of terminals is through thimbles lugs r
18. cification 3 35 CLIMATIC INFLUENCE REQUIREMENT The meter shall meet the requirement of dry heat cold damp heat cold damp heat cyclic test as per the relevant standards described in clause 3 02 of this specification Spec HT TVM DLMS Tamper Logics for HT TVM Persistence time 5 Min Annexure B Restoration Time 1 Min 60 Sec Tamper Events Occurrence Restoration 1 Missing Potential a Voltage lt 20 Vb gt 40 Vb b Current gt 10 Ib Ignored 2 CT Polarity Reversal a Line Current in tampered phase gt 5 Ib in reverse gt 10 Ib in direction forward direction b Power Factor gt 0 1 gt 0 1 3 CT Open a Line current in tampered phase lt 2 Ib gt 5 Ib b Line current in other phases gt 10 Ib gt 5 Ib c Load current in tampered phase gt 10 Ib Ignore 4 CT Bypass a By Pass Current gt 20 Ib lt 10 Ib current in tampered phase 5 Current unbalance a Maximum current Minimum current gt 30 Ib lt 10 Ib 6 Neutral Disturbance a DC current injected on neutral from If meter detect removal of DC load side by mean of electronic circuit voltage greater than injection using diodes after removal disconnection 1 25 times of Vref of neutral 7 Interference of Magnetic field a Presence of Magnetic field Magnetic field which removal of affects accurate Meter recording magnetic field
19. d of notice then work may proceed Spec HT TVM DLMS 25 The successful bidder shall submit the routine test certificates of bought out accessories and central excise passes for raw material at the time of routine testing if required by the purchaser and ensure that Quality Assurance requirements of this specification are followed by the sub contractors The Quality Assurance programme of the contractor shall consist of the quality systems and quality plans with the following details i Quality System The structure of the organization The duties and responsibilities assigned to staff ensuring quality of work The system for purchasing taking delivery and verification of materials The system for ensuring quality workmanship The system for retention of records The arrangements for contractor s internal auditing A list of administration and work procedures required to achieve and verify contract s quality requirements These procedures shall be made readily available to the project manager for inspection on request ii Quality Plans An outline of the proposed work and programmed sequence The structure of the contractor s organization for the contract The duties and responsibilities assigned to staff ensuring quality of work Hold and Notification points Submission of engineering documents required by the specification The inspection of materials and components on receipt Refer
20. dards these two tests may be carried out in accordance with the provisions of IS 3010 with latest amendments c Routine test All routine tests as stipulated in the relevant standards shall be carried out and routine test certificates reports shall be submitted to the Purchaser for approval and also placed inside individual meter packing 3 38 FIELD LABORATORY TESTING OF METER The supplier should furnish detailed write up for the procedure to be adopted for error testing of the meters in the laboratory and at site field 3 39 FURNISHING OF PRE COMMENCEMENT SAMPLES a The successful bidder shall furnish 2 Nos pre commencement samples of Trivector Meters fully meeting the requirement of specification for Nigam s approval The samples shall be tested at Nigam s own lab or at CPRI NABL accredited lab at the discretion of the purchaser The testing charges in case samples are sent to third party lab shall be borne by the supplier The bidder shall supply the meters only after approval of pre commencement of sample b Purchaser shall reserve the right to pick up energy meter at random from the lot s offered and get the meter tested at third party lab i e CPRI NABL accredited lab at the sole discretion of the purchaser The supplier has no right to contest the test results of the third party lab or for additional tests and has to replace take corrective action at the cost of the supplier It shall be the responsibility of th
21. e supplier to arrange such tests and purchaser shall be informed of the date and time of conduction of tests well in advance to enable him to witness such tests Test charges of the testing authority for such successful type tests shall be borne by the purchaser and in case of unsuccessful type tests same shall be borne by the supplier 3 40 QUALITY ASSURANCE PLAN Spec HT TVM DLMS 24 The Bidder shall invariable furnish the following information along with bid failing which his bid shall be liable for rejection Information shall be separately given for individual type of material offered i Statement giving list of important raw materials names of sub suppliers for the raw materials list of standards according to which the raw materials are tested list of tests normally carried out on raw materials in presence of Bidder s representative and copies of test certificates ii Information and copies of test certificates as in i above in respect of bought out accessories iii List of manufacturing facilities available iv Level of automation achieved and list of areas where manual processing exists v List of areas in manufacturing process where stage inspections are normally carried out for quality control and details of such tests and inspections vi List of testing equipment available with the bidder for final testing of equipment specified and test plant limitations if any vis a vis the type special acceptance
22. ection against penetration of solid objects dust and water e Protection against fraud f Protection against Pilferage ii All the materials and electronic power components used in the manufacture of the meter shall be of highest quality and reputed make to ensure higher reliability longer life and sustained accuracy iii a The manufacturer should use application specific integrated circuit ASIC for metering functions b The meter should not have any form of mechanical adjustment such as trim pots potentiometer etc for calibration The meter shall be factory calibrated and no adjustment of calibration shall be possible at site by any means c The electronic components shall be mounted on the printed circuit board using latest Surface Mount Technology SMT The PCB material should be made of glass epoxy FR 4 grade conforming to relevant standards or better grade iv All insulating materials used in the construction of meters shall be non hygroscopic non ageing and of tested quality All parts that are likely to develop Spec HT TVM DLMS corrosion shall be effectively protected against corrosion by providing suitable protective coating v The meter shall have test out put device in the form of calibrating LED accessible from the front and capable of being monitored conveniently with suitable testing equipment vi The meter shall conform to the degree of protection IP 51 of IS 12063 IEC 60529 for protection agains
23. educer type terminals The supplier shall supply a set of the same along with each meter ii The internal diameter of the terminal hole shall be minimum 4 0mm The holes in the insulation material of the terminal block which form an extension of the terminal holes shall be of sufficient size to accommodate the insulation of the conductors also The clearance and creepage distance shall not be less than the values specified in clause 6 6 of IS 14697 1999 Further the supporting webs between two terminals of the terminal block should be sufficiently high to ensure that dust does not bridge the two neighboring terminals or a flash over does not take place f The fixing screw s used on the ETBC for fixing and sealing of extended terminal cover shall be held captive on the terminal cover g To facilitate sealing a raised support arrangement with minimum 2 mm hole nearby sealing screws which shall constitute an integral part of the terminal cover or a slot type arrangement underneath alongside the sealing screw shall be provided xiv The termination of current circuit wires inside the meter i e CT primary conductor on the terminal block shall be through lugs and washers of proper size The loop length of the primary current circuit should be kept minimum Alternatively the CT primary conductor may be flattened to form a lug like shape for proper termination on terminal block without using lug or any other better arrangement may also
24. ence to the contractor s work procedures appropriate to each activity Inspection during fabrication construction Final inspection and test 3 41 GUARANTEE The equipments supplied should be guaranteed for their performance for a minimum period of five years from the date of commissioning or five and half years from the date of receipt in stores whichever date is earlier The equipment found defective within the above guarantee period shall be repaired replaced by the supplier free of cost within one month of receipt of intimation The supplier shall also furnish an undertaking that there shall be no drift in the accuracy class of the meter for a minimum period of 10 years from the date of supply The supplier shall arrange to provide free training at places as desired by the purchaser for use of meter Computer Software etc The supplier shall provide competent and timely after sales service support 3 42 INSPECTION Spec HT TVM DLMS 26 The purchaser s representative may carry out the inspection during manufacture and before dispatch The supplier shall keep the purchaser informed in advance about the manufacturing programme so that the purchaser can arrange for inspection The manufacturer shall grant free access to the purchaser s representative at a reasonable time when the work is in progress Inspection and acceptance of any equipment under this specification by the purchaser shall not relieve the supplier of his
25. ent temperature in shade 5 C e Average daily ambient air temperature 40 C f Maximum relative humidity 95 g No of months of tropical monsoon condition 4 Months Spec HT TVM DLMS 23 h Maximum attitude above mean sea level 1000 Meters i Average rain fall 10 100 cms j Maximum wind pressure 200Kg Sq meter k Isoceranic level days year 40 1 Seismic level Horizontal Accn 0 30 g m Permitted noise level 45 db 3 04 SUPPLY SYSTEM Rated Voltage Vref 3 x 63 5 V Phase to Neutral 3 phase 4 wire system For HTTVM Through PT 3x 110V Phase to Phase Meter shall be programmed for PT ratio 11KV 110V Ph to Ph Rated current Ib 3 x 5 Amps Connected through CT Multiplying factor to arrive at actual primary values wherever applicable shall be calculated from the CT and PT ratio of the installed CTs and PTs CT ratio of the installed CT s 3 05 POWER FACTOR RANGE The meter shall be suitable for full power factor range from zero lagging through unity to zero leading The meter should work as an active energy import and export and reactive lag and lead energy meter 3 06 POWER SUPPLY VARIATION The supply system shall be 3x110V Phase to Phase 3 phase 4 wires The extreme power supply variations for which an operating meter should withstand without damage and without degradation of its meteorological characterstatics when it is subsequently operated under its norma
26. er data prior to change is downloaded from the meter before the change is effected in the meter Details of minimum 10 such change s event s made in the meter shall be logged in the meter memory each with date and time stamp and shall be capable of downloading through HHU and shall be available for viewing at the BCS end The logging shall be roll over type on first in first out basis iii The meter data should download with the speed of 9600 BPS Any future up gradation made by the supplier in any of the above software s shall also be provided free of cost a Platform The BCS should be executable on MS WINDOWS 95 98 2000 XP VISTA or higher operating system The BCS shall be suitable to run on IBM PC or compatible hardware platform b Meter Data Display i The BCS should show electrical conditions existing at the time of reading the meter in tabular forms as well as in graphical format Phasor diagram ii All the information about energy maximum demand and their respective TOD register readings billing register readings and billing history readings should be shown in a manner which user can understand quickly preferably in tabular format iii All the load survey data should be available in numerical as well as graphical format It should also be possible to view this data in daily weekly and monthly formats The load survey graph should show values where the cursor pointer is placed for the selected or all parameters
27. er shall be as per Annexure B Spec HT TVM DLMS 19 f Magnetic Influences The meter should record the presence of abnormal external magnetic fields alongwith date and time Snapshots numerical values of voltage current power factor and energy kWh readings as well as the date and time of logging of the occurrence and restoration of all tamper events subject to meter memory space as described herein under should be logged in the meter memory and available for retrieving through the meter s optical port via CMRI and downloading to the BCS g Cover Open Tamper If the meter cover is opened the meter shall log this as tamper and shall display Open with date and time of such opening and should not restore in any condition in power on as well as power off condition in blinking display on the LCD alongwith other display parameters so that it is immediately noticed by the meter reader and same shall be downloaded in CMRI h High voltage and high frequency The accuracy of the meter should not be affected with the application of abnormal voltage frequency generating device such as spark dischager of approximately 35 KV The meter shall be tested by feeding the output of such device s to meter in any of the following manner for 10 minutes i On phase and neutral terminals ii On any connecting wires of the meters iii Voltage discharge with 0 to 10mm spark gap iv Spark on meter body v At any place in load c
28. etecting and recording phase wise occurrences and restoration events of missing potential one phase or two phases as on meter terminals which can happen due to intentional accidental disconnection of potential links leads with date and time along with the total number of such events for all phases Absence of one or more phase voltage from mains side should not be recorded as missing potential b Neutral Disturbance The meter shall be capable of detecting occurrences and restoration of injection of spurious signals on the neutral of the meter such as DC signals through diodes etc which affect the meter functionality and energy recording c Current Reversal The meter shall be capable of detecting and recording phase wise occurrences and restoration of current reversal of one or more phases d CT Short Bypass amp Current Circuit Open Failure The meter shall be capable of detecting and recording occurrences and restoration of shorting bypassing and opening failure of any one or two phases of current circuit when the meter is connected to a 3 phase 4 wire system or 3 phase 3 wire system The No load condition should not be recorded as tamper e Current Unbalance The meter shall be capable of detecting and recording occurrences and restoration of current unbalance as a tamper event only The threshold values for voltage current and power factor etc for the purpose of logging occurrence and restoration of various type of tamp
29. eter The manufacturing of the equipment shall be strictly in accordance with the approved drawings and no deviation shall be permitted without the written approval of the purchaser All manufacturing and fabrication work in connection with the equipment prior to the approval of the drawing shall be at the supplier s risk Approval of drawings work by purchaser shall not relieve the supplier of his responsibility and liability for ensuring correctness and correct interpretation of the drawings for meeting the requirements of the latest revision of application standards rules and codes of practices The equipment shall conform in all respects to high standards of engineering design workmanship and latest revisions of relevant standards at the time of ordering and purchaser shall have the power to reject any work or materials which in his judgment is not in full accordance therewith The successful Bidder shall within 2 weeks of placement of order submit three sets of final versions of all the drawings as stipulated in the purchase order for purchaser s approval The purchaser shall communicate his comments approval on the drawings to the supplier within two weeks The supplier shall if necessary modify the drawings and resubmit three copies of the modified drawings for their approval The supplier shall within two weeks submit 30 prints and 2 good quality report copies of the approved drawings for purchaser s use Eight sets of operating m
30. fitted must be visible from the front Test output device shall be provided in the form of one common LED for kWh kVArh and optionally kVAh with the provision of selecting the parameter being tested Alternatively test output device in the form of separate LEDs for kWh kVArh and optionally kVAh is also acceptable The relation between test output and the indication on display shall comply with the marking on the name plate imp per kWh kVArh kVAh The bidder shall state the necessary number of pulse count s to ensure measurement accuracy of at least 1 10 of class of the meter at the different test points The resolution of the test output pulse s should be sufficient to enable conduction of the starting current in less than 10 minutes and accuracy test at the lowest load with desired accuracy within 5 minutes 3 22 AUXILIARY POWER The auxiliary power shall be drawn from all the three phases and the meter should be able to remain powered up with availability of any two phases or any one phase and neutral Alternative power packs one percent of ordered quantity for taking reading during power down conditions shall be supplied free of cost 3 23 A MAXIMUM DEMAND MD REGISTRATION The meter shall continuously monitor and calculate the average demand in KVA during the integration period set and the maximum out of these shall be stored alongwith date and time when it occurred in the meter memory The maximum registered value shall a
31. g iv Location d The Data Transfer It should be possible to transfer the data to and from HHU through serial interface port 7he data transfer shall be in the desired format which suits to billing software of the Nigam f Security The BCS shall have multi level password for data protection and security The first level shall allow the user to enter the system The different software features shall be protected by different passwords The configuration of passwords shall be user definable The software installed on one PC shall not be copiable on to another PC 3 17 SALIENT FEATURES The meter shall have the following additional salient features i It should be possible to check the healthiness of phase voltages by displaying all the voltages on the meter display ii The meter display shall have phase indicators to indicate the status of phase voltages which shall keep coming with every display iii The meter should work accurately irrespective of phase sequence of the mains supply Spec HT TVM DLMS 12 iv It should be possible to check the correctness of connections of CT and PT to the meter with proper polarity This shall be made available on HHU by displaying phasor diagram For this purpose a suitable software for field diagnosis of meter connections with the help of meter and HHU should be supplied as per Annex G15 of IS 14697 1999 v The meter should remain powered up and functional even when either of a
32. g of component on the PCB Printed Circuit Board must be SMT Surface Mounted Technology type by deploying the automatic SMT pick and place machine and reflow soldering process The electronic component used in the meter shall be of high quality such that the meter shall remain in the accuracy class for at least up to 10 years Further the Bidder should own or have assured access through hire lease or subcontract of above facilities ii Quality should be ensured at the following stages a At PCB manufacturing stage each board shall be subjected to computerised bare board testing b At insertion stage all components should under go computerised testing for conforming to design parameters and orientation c Complete assembled and soldered PCB should under go functional testing using Automatic Test Equipments Testing Jig d Prior to final testing and calibration all electronic components of the meter shall be subjected to accelerated ageing test to eliminate infant mortality iii The calibration of meters shall be done in house iv The bidders should submit the list of all major components used in meter along with the offer v A detailed list of bought out items which are used in the manufacture of the meter should be furnished indicating the name of firms from whom these items are procured The bidder shall also give the details of quality assurance procedures followed by him in respect of the bought out items 3 13 SEA
33. ircuit The accuracy of the meter shall be checked before and after the application of above device s with site conditions 3 29 TAMPER LOGIC As per the guideline issued by CPRI Banglore 3 30 TAMPER PERSISTENCE TIME The persistence time for logging registration of an occurrence of a tamper should be 5 minutes 10 seconds The persistence time for logging of restoration of tamper should not be more than 120 seconds 3 31 ACCURACY REQUIREMENT The accuracy of parameters measured by meters shall be tested in accordance with the relevant standards described in clause 3 02 of this specification For apparent energy accuracy testing shall be done in accordance with the provisions of Annexure G 7 of IS 14697 1999 Time accuracy of the meter should be as per Annexure G 18 of IS 14697 1999 Spec HT TVM DLMS 20 3 32 ELECTRICAL REQUIREMENT The electrical requirement of the meter shall be as specified in the relevant Standards described in clause 3 02 of this specification 3 33 ELECTROMAGNETIC COMPATIBILITY AND INTERFERENCE The meter shall meet EMI EMC requirement as specified in the relevant Standards described in clause 3 02 of this specification and shall also be protected against radiated interferences from either magnetic or radio frequency sources 3 34 MECHANICAL REQUIREMENT The meter shall be capable of meeting the mechanical requirement as specified in the relevant standards described in clause 3 02 of this spe
34. l operating conditions shall be as follows Specified operating range 0 8 to 1 15 V ref Limit range of operation 0 7 to 1 20 V ref Frequency 50 Hz 5 However the bidder can offer meter which can withstand higher variations The limit of power supply variations should be as per IS 14697 1999 3 07 ACCURACY Class of accuracy of the meter shall be 0 5S The accuracy should not drift with time Spec HT TVM DLMS diz 3 08 POWER CONSUMPTION i Voltage circuit The active and apparent power consumption in each voltage circuit including the power supply of meter at reference voltage reference temperature and reference frequency shall not exceed 1 0 Watt per phase and 8 VA per phase respectively ii Current circuit The apparent power taken by each current circuit at basic current reference frequency and reference temperature shall not exceed 1 VA per phase 3 09 STARTING CURRENT The meter should start registering the energy at 0 1 Ib and unity power factor 3 10 MAXIMUM CURRENT The rated maximum current of the meter shall be 200 Ib 3 11 GENERAL AND CONSTRUCTIONAL REQUIREMENTS i Meters shall be designed and constructed in such a way so as to avoid causing any danger during use and under normal conditions However the following should be ensured a Personnel safety against electric shock b Personnel safety against effects of excessive temperature c Protection against spread of fire d Prot
35. le at BCS end as well as on meter display The count shall not increase through HHU operations as instantaneous parameters view and other similar HHU operations which do not download any data from meter memory xi Data Alteration Count Meter should be capable to display the data alteration count This count should increase by one digit whenever there is any programme or meter data change in the meter through HHU or computer or any other device and be available at BCS end as well as on meter display This count should not increment on any data read only communication xii The meter shall be capable of detecting condition of power off if mains supply is not present It shall record such occurrence and restoration of power failures as separate events in the meter memory with date and time stamp Snapshot of electrical parameters is not necessary during this condition xiii The meter shall have provision to be read in the absence of power through an external internal source as per provision of Annex G14 of IS 14697 1999 such that it should not be possible to damage the internal circuitry of the meter by applying Spec HT TVM DLMS 13 any voltage on through the device port provided for powering up the meter in the absence of power supply The bidder should explain the method adopted by them for this purpose in their offer Minimum 20 such events either off or on shall be logged in meter memory and be available for downloading through a C
36. ll be made from best quality phenol formaldehyde or 10 20 glass filled polycarbonate material or any equivalent better material conforming to FH 1 of IS 11731 Part I having adequate insulating properties and mechanical strength with brass inserts for connecting terminals The terminal block should satisfy all the conditions specified in IEC 62052 amp IS 14697 and shall be made from best quality phenol formaldehyde or 10 20 glass filled polycarbonate material or any equivalent better material The glass filled polycarbonate should fulfill the requirement of following tests i The flame retardant rating of VO as per UL94 testing ii The glow wire temperature of 960 deg C as per IS 11000 part 2 Sec 1 or IEC 695 2 1 iii Heat deflection temperature HDT test of 135 deg C iv Ball pressure test at 125 deg C b The terminal block the ETBC and the meter case shall ensure reasonable safety against the spread of fire and shall not be ignited by the thermic overload of live parts in contact with them c The current circuit conductors of a meter shall be connected to its current terminals inside the meter terminal block adopting procedure prescribed either B 1 or B 2 of the recommended methods under Clause 6 4 Annexure B of IS 14697 Any other method which meets this requirement in a better manner way shall also be considered The bidder should elaborate the arrangement adopted d The meter terminal block shall have tin plated
37. lso be made available on meter display The maximum demand will be computed from the main apparent energy register The rising demand under the current integration period should be displayed along with the elapsed time Spec HT TVM DLMS BAe The integration period shall be set as 30 minutes on real time basis starting from 00 00 H The principle of maximum demand calculation used by the Bidder should be explained in the offer 3 23 B Maximum Demand Registration and MD resets Meter shall continuously monitor and calculate the average maximum demand of each demand interval time of 15 30 minutes on real time basis and maximum of these in a calendar month shall be stored The maximum demand shall automatically reset at 24 00 hrs of the last date of each calendar month for which minimum 30 years calendar shall be programmed by the manufacturer The cumulative kWh should also be recorded at 24 00 hrs on the last date of each calendar month for previous 6 months 3 24 MAXIMUM DEMAND RESET The auto reset facility of MD at pre defined date amp time shall be provided The meter shall log on in the meter memory average value of voltage amp current for 15 30 minutes integration period the maximum demand reset count which should increment by one digit every time the MD is reset 3 25 LOAD SURVEY CAPABILITY amp BILLING POINT REQUIREMENTS As per the guideline issued by CPRI Banglore 3 26 HARMONICS MEASUREMENTS The accuracy
38. mpliant HHU shall be used The HHU shall be as per specification given in the enclosed guidelines document It shall be compatible to the DLMS compliant energy meters that are to be procured supplied on the basis of this specification The HHU shall be supplied by the meter manufacturer along with the meter 1 of ordered quantity F TAMPER amp FRAUD MONITORING FEATURES The meter shall work satisfactorily under presence of various influencing conditions like External Magnetic Field Electromagnetic Field Radio Frequency Interference harmonic Distortion Voltage Frequency Fluctuations and electromagnetic High Frequency Fields etc The meter shall be immune to abnormal voltage frequency generating devices and shall record the occurrence and Spec HT TVM DLMS 16 restoration of such tamper events along with parameters such as current voltages kWh power factor event code date amp time etc listed in Table A6 1 to A6 7 in enclosed document Tamper details shall be stored in internal memory for retrieval by authorized personnel through either of the following i HHU ii Remote access through suitable communication network Minimum 200 numbers of events occurrences amp restoration with date amp time should be available in the meter memory 3 21 OUT PUT DEVICE The meter shall have a test output accessible from the front and be capable of being monitored with suitable testing equipment The operation indicator if
39. n Meter Revised July 1996 Reading Instrument 5 IS 9000 Basic Environmental Testing Procedures for Electronic amp Electrical items 6 IEC 62056 DLMS COSEM Open protocol standard for communication of meter datas 7 IS 15707 Testing Evalution Installation and maintenance of AC Electricity meters Code of Practice Meters matching with requirements of other national or international standards which ensure equal or better performance than the standards mentioned above shall also be considered When the equipment offered by the tenderer conforms to standards other than those specified above salient points of difference between standards adopted and the standards specified in this specification shall be clearly brought out in the relevant schedule and copy of such standards along with their English translation shall invariably be furnished along with the offer 3 03 CLIMATIC CONDITIONS The meters to be supplied against this specification should be capable of performing and maintaining required accuracy under extreme hot cold tropical and dusty climate and solar radiation typically existing in the state of Rajasthan India The meter shall be required to operate satisfactorily and continuously under the following tropical climate conditions a Maximum ambient air temperature 50 C b Maximum ambient air temperature in shade 45 C c Maximum temperature attainable by the meter exposed to Sun 60 C d Minimum ambi
40. ny two phases or any one phase alongwith neutral is available to the meter vi The meter should continue to record accurately as per prevailing electrical conditions even if the neutral of potential supply gets disconnected vii The meter shall be provided with adequate magnetic shielding so that any external magnetic field AC Electro Magnet or DC Magnet as per the values specified in CBIP Technical Report No 88 with latest amendments applied on the meter shall not affect proper functioning and recording of energy as per error limits prescribed by CBIP However the meter alone should comply up to 0 27 Tesla D C magnetic field On application of 0 27 Tesla DC magnet at anywhere on meter body In case of Magnetic Interference beyond 0 27 Tesla the meter shall record energy at Imax rated voltage and unity power factor as per CBIP IS and the event of Magnetic Interference and restoration shall be available with date amp time stampings along with other snap shots viii Meter shall have Scroll Lock facility to display any one desired parameter continuously from display parameters which will keep on displaying till the lock is released ix The meter should continue to function even if any spurious signals are injected on the neutral of the meter such as D C signals through diodes etc x The meter reading count should increase by one digit every time the meter is read successfully through HHU or computer or any other device and be availab
41. rchaser who will interpret the meanings of drawings and specification and shall have the power to reject any work or material which in his judgment is not in accordance therewith The offered HT TVM shall be complete with all accessories software and components necessary for their effective and trouble free operation Such components shall be deemed to be within the scope of Bidder s supply irrespective of whether those are specifically brought out in this specification and or the commercial order or not iii The meter shall be ISI mark amp bidder shall furnish the details of ISI license at the time of bid or within 60 days from the date of opening of bid 3 02 STANDARDS APPLICABLE Unless otherwise specified elsewhere in this specification the performance and testing of the meters shall conform to the following Indian International Spec HT TVM DLMS 2 Standards and all related Indian International standards to be read with up to date and latest amendments revisions thereof S Standard No Title No IS 14697 1999 Specifications for AC Static 1 With latest amendments Transformer Operated Watt hour and VAR Hour Meters class 0 2S amp 0 5S 2 CBIP technical report No 304 Specification for AC Static Electrical Energy Meters With latest amendments 3 IEC 62053 22 2003 AC Static Watt hour Meters for Active IEC 62052 11 2003 Energy class 0 2S amp 0 5S 4 CBIP Technical Report No 111 Specification for Commo
42. t ingress of dust moisture and vermin vii The meter shall be immune to tampering through application of external magnetic field A C electro magnet or D C magnet as per the value specified in CBIP technical report 88 with latest amendments However the meter alone should comply up to 0 27 Tesla Magnetic field with a permanent magnet viii The meter should continue to function even if any spurious signals are injected on the neutral of the meter such as D C signals through diodes etc and or High Frequency Signals ix The meter shall be supplied with a transparent extended terminal block cover ETBC x The meter shall have two push buttons one for forward scrolling and other for reverse scrolling of different parameters available in push button mode xi Meter Base And Cover a The meter base meter cover terminal block and ETBC shall be made of unbreakable high grade flame retardant polycarbonate with thickness more than 2 0 mm and of good dielectric and mechanical strength The material of meter base amp terminal block shall be glass reinforced b Meter cover and extended terminal block cover ETBC should be injection moulded in UV stabilized polycarbonate in natural colour The ETBC shall be kept fully transparent and the meter cover except the window portion shall be semi transparent non transparent corrugated The moulded meter case and terminal cover s should not change in colour shape size and dimensions
43. with above information and without supporting test reports for meter meeting the requirement of tests laid in this specification are likely to be rejected a Type tests The Energy meter compatible with DLMS protocol offered shall be fully type tested at any NABL accredited test laboratories as per relevant standards but test reports shall not be more than two years old from the date of opening of bid The bidder shall furnish two sets of type test reports along with the bid Beside above bidder should also submit the test report from CPRI Bangalore alongwith the bid for the latest version of the Indian Standard on Data Exchange for Electricity Meter Reading Tariff amp Load Control Companion Specification released by BIS b Acceptance tests Spec HT TVM DLMS 23 The Supplier in the presence of the Purchaser s representative shall carry out all acceptance tests as stipulated in the relevant standards The following additional tests shall also be carried out on meters from each lot offered for inspection as per the relevant standards on selected samples Shock test Vibration test Magnetic Induction of External Origin and Verification of tamper and fraud detection features and threshold values as per specifications and subsequent agreement between the Supplier and Purchaser Note Where testing facilities do not exist at the Supplier s works for shock and vibration testing as per the relevant stan
44. y backup memory will not be considered as NVM It should be possible to easily identify the single or multiple displayed parameters through symbols legend on the meter display itself or through display annunciator alongwith a separate legend plate fixed on the front face of the meter cover The register shall be able to record and display starting from zero for a minimum of 1500 hours the energy corresponding to rated maximum current at reference voltage and unity power factor The register should not roll over in between this duration Spec HT TVM DLMS 14 3 19 METER SERIAL NUMBER In addition to providing serial number of the meter on the display plate the meter serial number shall also be programmed into meter memory for identification through HHU meter reading print out 3 20 DISPLAY SEQUENCE The meter shall display the required parameters as per guideline document issued by CPRI Banglore A QUANTITIES TO BE MEASURED amp DISPLAYED The meter shall be capable of measuring and displaying the following electrical quantities within specified accuracy limits for polyphase balanced or unbalanced loads a Instantaneous Parameters such as phase and line voltages currents power factors overall kVA kW kVAr power factor frequency etc as per details given in the table below and enclosed annexure b Block Load Profile Parameters such as kVAh kWh kVArh lag lead Maximum Demand MD in kW kVA power factor phase and
45. y packed in the first instance to prevent ingress of dust and moisture and then placed in cushioned carton of a suitable material to prevent damage due to shocks during transit The lid of the cartoon may be suitably sealed A suitable number of sealed cartons may be packed in a case of adequate strength with extra cushioning if considered necessary The cases may then be properly sealed against accidental opening in transit The packing cases may be marked to indicate the fragile nature of the contents b The following information shall be furnished with the consignment Name of consignee Details of consignment Destination Spec HT TVM DLMS 27 Total weight of consignment Sign showing upper lower side of the crate Sign showing fragility of the material Handling and unpacking instructions Bill of material indicating contents of each package and spare materials 3 45 DOCUMENTATION All drawings shall conform to International Standards Organization s ISO A series of drawings sheet Indian Standards Specifications IS 656 All drawings shall be in ink and suitable for microfilming All dimensions and data shall be in S I Units List of drawings and documents The bidder shall furnish the following along with bid i Two sets of drawings showing clearly the general arrangements fitting details electrical connections etc ii Technical leaflets User s Manual giving operating instructions for the m
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