INDEX ( Testing Procedures ) - Brihanmumbai Electric Supply And Transport
INDEX ( Testing Procedures ) SR. NO. MATERIAL DESCRIPTION PAGE NO. FILE NO. MTS/FL/MTL --- PREFACE 5 1 Black adhesive tape 6 2 2 Cotton Tape 10 2 3 HT Bitumen tape 12 2 4 Impregnated paper separator 14 2 5 LT Bitumen tape 16 2 6 PVC tape 19 2 7 HRC FUSES 21 3 8 Cutouts 25 3 9 Fuse Base 27 3 10 Non fusible transformer link 630 amp 30 3 11 Neutral links 33 3 12 T.L. Fuses 35 3 13 HPSV Lamp 37 5 14 Lanterns 39 6 15 Ballasts-HPSV 41 7 16 11KV/110V PT and 33000/110V PT 44 8 17 Metering / Protection CTs 51 9 18 Adapter for Bank Type Metering CT 57 9 19 Ring CTs ( LV metering) 59 9 1
INDEX( Testing Procedures ) SR. NO. MATERIAL DESCRIPTION PAGE NO. FILE NO. MTS/FL/MTL 20 Summation CTs 61 9 21 RCC Trough/Tiles 62 10 22 Power Capacitor (28KVAr, 56KVAr) 64 11 23 Capacitor for Lantern 10µF, 33 µF,40 µF 67 11 24 Cable in Coil form (unarmoured) 69 13 25 L.V. Armoured Cables 71 14 26 H.V. Cables 73 15 27 400 mm2/1C copper XLPE Cables 75 15 28 Lead Pipe 77 16 29 Pluming Metal, AL & CU Solders 79 16 30 Compounds Inner Sleeve 80 17 31 Compounds Outer Sleeve 84 17 32 Epoxy Jointing/Termination Kits 87 17 33 Air Break Contractors 89 18 34 MCB 92 18 35 MCCB 94 18 36 ELCB MCB ( Refer testing of ELCB and MCB) --- 18 37 ELCB 96 18 38 Paints 99 19 2
INDEX (Testing Procedures ) SR. NO. MATERIAL DESCRIPTION PAGE NO. FILE NO. MTS/FL/MTL 39 Tarpaulin General/ Grey/ Fabric 104 20 40 Lugs/AL. Ferrules ( AL, Copper ) 106 22 41 Brass Glands 107 22 42 Bakelite Sheet 108 23 43 Synthetic Mat 113 23 44 Hand Gloves 116 23 45 Gum Boot 118 23 46 Safety Shoes 120 23 47 Cork Sheet 122 23 48 Transformer Oil 24 B.D. Value 123 Tan Delta 125 Acidity 129 PPM 132 Flash Point 136 Viscosity 138 49 Copper Winding Wires 140 25 50 G.I. Earthing Wires 142 25 51 Fuse Wires 145 25 52 Plastic Putty 147 30 3
SR. NO. PAGE NO. FILE NO. MTS/FL/MTL Fuse Switch Unit/Switch Fuse Unit/ICTPN/ICDP Distribution Transformer (Loss Measurement) AL/CU Busbars/CU Earthing Plate, Cu Strips. Ignitors 150 36 153 45 161 54 163 56 166 57 58 L.V. Distribution Pillars, L V Boards/Mini Pillars Energy Meters ( static ) 167 61 59 Compact Fluorescent Lamp & Adapter 174 62 60 Ceiling Fan/Table Fan 175 63 61 GSM of paper 177 64 62 Choke/20/40 watts 178 65 63 Electronics Chokes/Tube lights 180 67 53 54 55 56 57 MATERIAL DESCRIPTION 4
MATERIAL TESTING AND STANDARDS DEPARTMENT General procedure followed in MTS department: 1. 2. 3. 4. 5. 6. 7. Materials are received against following references: a ) Tender: ( Samples are supplied along with tender) b) Inspection Memo: (Samples are to be selected as prescribed in testing procedures ). c) Departmental Letters of Various dept. of Supply branch: ( Materials are brought /taken back by concerned departments ) d) Departmental Letters of Bldg. dept. (Now referred as works dept.): Materials are to be tested as per the procedures prescribed in this book. Tender samples of successful vendors are kept preserved till the supply of entire quantity of material against the same is completed. Samples of unsuccessful vendors are asked back by MM dept. Materials from outside parties are tested for R & D purpose as chargeable jobs under reference no. MTL-27. Samples are to be marked with IM / Tender nos. Etc. for identification. Aluminum solder and Plumbing metal are tested at outside laboratory as presently chemical analysis is not feasible in our laboratory. Flow of papers: 1. 2. 3. 4. 5. 6. 7. References are received and registered in the inward register by administrative staff and then forwarded to respective officers. Materials are checked and collected by testing staff/officers. DyEMTS distributes the works among testing officers/staffs. After testing materials within stipulated time reports are prepared in duplicate by testing officers/staffs and scrutinized by DyEMTS. It is then verified by AEMTS and approved by DEMTS. Reports are then forwarded to respective accepting / requesting authority. Duplicate copies are preserved in MTS dept. in respective files by administrative staff. DEMTS 5
BLACK ADHESIVE TAPE 1. Objective 2. Apparatus/ material 3.Responsibility 4. Reference 5 Procedure TESTING OF BLACK ADHESIVE TAPE Micro-meter, Tensile machine , Spring balance, 0-5 KV HV Test Set Steel plate , roller etc. Testing is to be done by Minimum T-5 grade staff. IS 7809 (PART I & II): 1977 Pressure Sensitive Adhesive Tapes for Electrical Purpose SPECIFICATION NO. MTS/MTL-2/3/99 with latest amendments. Pressure sensitive Adhesive Tape with Woven water proof cotton base, black insulating adhesion one side coated, shall meet the following parameters:a) Thickness: 0.3 /- 0.045 mm b) Width : 20 /- 1.0 mm c) Roll length: 25 meters d) Tensile Strength: 8.0 Kg/cm width e) Adhesion to steel: 150 grams/cm width (Before ageing). 100 grams /cm width (After Ageing) f) Breakdown Voltage: 2.0 KV 5.1 Sampling : ( As per IS – 8402-1977 ) Upto 100 2 101 to 500 5 501 to 1000 7 1001 and above 10 5.2 Dimension analysis : 5.2.1 Thickness (Clause-3 of IS 7809 P-II) : Measurement 5.2.1.1 Test Apparatus: A dead weight dial type micrometer having two ground and lapped concentric circular surfaces, flat within 0.001 mm and parallel to within 0.003 mm shall be used. The dial shall be graduated to read correctly to 0.002 mm. The accuracy of the micrometer shall be checked frequently by means of a set of steel gauges. The measuring errors of the micrometer shall not exceed 0.005 mm. 5.2.1.2 Test Specimen: Nine Specimens at least 75 mm long, are cut from the roll at intervals of not less than 300 mm. 5.2.1.3 Procedure:Place the test specimen between the jaws of the micrometer with adhesive side down in contact with the fixed foot. Take care to ensure that no air bubbles are trapped. Lower the moving pressure 6
foot gently into the surface of the tape and take the reading on the dial within two seconds. Make the measurements to the nearest 0.005 mm. Report the centre value as well as the max. and min. values of the nine measurements of thickness in mm. 5.2.2 Width (Clause-6.2of IS 7809 P-I) When measured with scale it should be 20mm 1mm. 5.3 5.3.1 Tensile Strength (Clause-9 IS 7809 P-II): Apparatus: A tensile testing machine, power driven equipped with a continuous load indicating device, calibrated to determine even one percent of the breaking load. 5.3.2 Test Specimens: Five test specimens of sufficient length to give an initial length of 200 mm are removed from the roll under test by pulling radially, at a rate of 300 mm per second, at intervals of 300 mm. If the width of the tape is 25 mm or less, the width of the specimen is the width of the tape. 5.3.3 Procedure: Insert the test specimen into the machine so that the load is applied evenly across the width of the tape. For tapes having an elongation at break up to 50 percent, the initial test length is 200 mm. The test specimen is elongated until it breaks, with a uniform rate of movement of the driven jaw of 300 /- 30 mm per minute. The maximum load is recorded. Five valid determinations are made. It is necessary to take care to ensure that during the test the tape does not slip in the jaws of the testing machine. 5.3.4 Result: Report the tensile strength in Newton per 10 mm width for each Millimeter thickness. 5.4 5.4.1 Adhesion to steel (Clause10 IS 7809 P-II ) : Apparatus: 5 Rectangular test plate of stainless steel of the following composition. Carbon0.16 % max. Silicon 0.2 % min. Manganese 2.0% max. Nickel 8-14% Chromium 1-18 % A convenient size of plate is 200 X 50 mm; the thickness shall be at least 2 mm. The test surface of the plate shall be polished to give an abrasive satin finish. 7
Roller: A polished steel roller having a diameter of at least 50 mm and mass 2 Kg, being able to exert a pressure of 20 N per 10 mm width. 5.4.2 Test Specimen: Five strips of 450 mm length are removed from the roll under test by pulling radially, at a rate of 300 mm/s at interval of 300 mm. 5.4.3 Procedure: The face of the plate is wiped with a fresh piece of cotton wool saturated with pure toluene. The clean plate is allowed to dry and is then suspended above the liquid in a toluene vapour bath and allowed to remain for 5 minutes after the vapour line has reached the top of the plate. On removal from the vapour bath, it is suspended for approximately 30 minutes at 27 /- 2oC & 65 /- 2% RH 5.4.4 Preparation for the Adhesion to Steel Test: The prepared plate is placed with the test surface upwards on the edge of a bench. The test specimen is applied with the adhesive surface downwards to the test surface of the plate parallel to the longer sides of the plate. Take care that no air bubbles are trapped between the tape and the plate. Approximately 250 mm length of the test specimen overhangs downside. Place the roller centrally across the test specimen on one end of the plate and pass it by load at a constant speed four times over the test specimen on the plates twice in each direction, so that each traverse of 200 mm takes 10 to 12 seconds. The specimen shall be applied to the plate within 15 seconds of being taken from the roll of tape. The overhang side is placed in the traversing jaw of the tensile machine and the free end of the test specimen is placed in the other jaw. Care should be taken to ensure that the free tape is parallel in both planes to the applied tape. The traverse jaw is set in motion at a rate of 300 /30 mm /minute and the readings at five consecutive 12.5 mm, 20 mm or 30 mm interval marks are recorded. The test is performed at 27 /- 2oC and 65 /- 2% relative humidity. Record the five readings on each of the five test specimen. Arrange the five readings for each test specimen in ascending order and take the central value of each group. Arrange the five centre values so obtained in ascending order and take the centre values of this as the adhesion to steel. Express the values in gm/cm. 5.5 Voltage Breakdown (Clause 7.1 IS 7809 P-II): The width of the tape to be used shall be in the range of 12 mm to 25 mm. The specimen of tapes to be tested are prepared by wrapping the tapes spirally around clean brass or copper rods of 8 8
mm diameter over a length of 200 mm with overlap slightly less than 50 percent. One end of the rod is left unwrapped and used for making an electrical connection. A conductive paint or a metal foil at the centre portion of the test specimen will serve as one electrode having a length of 100 mm. AC voltage is applied through 0-5 KV HV Test Set. The voltage is raised at a nearly uniform rate of 100 to 200v per second until breakdown occurs between 10 to 20 seconds. 5.6 After ageing test ( only on tender samples): The black adhesive tape ( 30 cm in length ) when tested after 2 hours after ageing shall withstood the adhesion test as prescribed in para 5.4 , ( Ageing : 2 specimen from each sample are kept suspended in dry air oven simultaneously at 80o 1oC for 120 hours. ) 6. Test report Blank format Prepared by: Approved by: DyEMTS/AEMTS DEMTS 9
COTTON TAPE 1. Objective TESTING OF COTTON TAPE 2. Apparatus/ material 3.Responsibility 4. Reference Dial gauge, Scale , Tensile machine, Electronic weighing machine Testing is to be done by Minimum T-5 grade staff. IS NO :-1923 / 1973 Specification :- Tender specification 5.1 Sampling: 5 Procedure Upto 100 101 to 500 501 to 1000 1001 and above 2 5 7 10 5.2: DIMENSIONAL ANALYSIS Equipment :- Dial gauge, Scale. 5.2.1 THICKNESS OF TAPE (Table – 1 of 1923) i) With the help of dial gauge measure the thickness. ii) Five measurements shall be made at random in a length not less than 1 meter of tape. From each sample. iii) The average of these 5 measurements shall lie within the limits. Specified in table 1 ( 10%). Our specified value is 0.18 mm 0.018 (10%). 5.2.2 WIDTH(Table – 1 of 1923) i) Width shall be measured at 5 places at random in a length not less than 1 meter of tape from each sample role. ii) The width shall not vary by more than 1 mm from the specified value. Our specified value is 20 / 25 mm I 1 mm. 5.3 i) ii) iii) iv) v) WEIGHT / 100 METERS IN GMS(Table – 1 of 1923) Take a piece of 1 meter length. Note down the weight on Electronic weighing machine Covert this weight in weight / 100 meters by multiplying by 100. Specified weight /100mtrs. for 20 mm width tape is 130 gms 5%. Specified weight/100 mtrs. for 25 mm width tape is 165 gms 5%. 10
5.4 TENSILE STRENGTH (Table – 1 of 1923) Equipment – Tensile machine. Cut the test sample from one roll of 30 cm in length & full width. i) Adjust the constant speed of 30 cm / min.* ii) Adjust the length on the tensile machine to 20 cm (test length 20 cm) iii) Keep the range on 100 kgf. iv) Fix the sample piece in the jaws of the tensile machine. v) Press the “down” button on the Tensile machine & observe the value on the tensile scale at which the tape specimen tears. vi) The tensile strength is express in kgf / full width. vii) Our specified value is (for 20 mm width tape) is 16 kgf & for 25 mm width tape is 20 kgf. *By adjusting the belt position respectively provided at the bottom on the bank side of the tensile machine. Note :- The Sample piece of tape at the time of break should cut at the centre only. 6. Test report Blank format Prepared by: Approved by: DyEMTS/AEMTS 11 DEMTS
HT BITUMEN TAPE 1. Objective Testing of HT Bitumen Tape 2. Apparatus / material 3.Responsibility 4. Reference 0-5 kV H.V. Test set. 5 point HV Test Apparatus , scale , Dial Gauge, Tensile machine Testing is to be done by minimum T-5 grade staff. IS- 7755 / 1975 – Specification for High Tension Insulating Cotton Tape Impregnated with Bitumen- Based Compound IS 2584-1963 5.1 Sampling: ( Table 3 of IS 7755) Lot size Nos. of samples Up to 25 2 26 to 50 3 51 to 100 5 101 to 300 8 301 and above 13 5. Procedure 5.2: Dimensional Analysis (Clause 4.0 & 10.3) 5.2.1 Width: The width shall be measured at five places at random in a length of not less than one meter of tape from each sample roll & in no case shall the width vary by more than one millimeter from the nominal width measure the width by steel rule. 5.2.2 Thickness: The thickness shall be measured with a dial type micrometer. Five measurements shall be made at random in a length of not less than one meter of tape from each sample roll. The average of these measurements (five) shall fall within the limits of 0.40 /0.05mm. 5.3 ELECTRIC BREAKDOWN STRENGTH (Cl. 3.4.4.1 of IS) Equipment: - 0-5 kV H. V. Test set, 5 point H. V. Test apparatus. 5.3.1 Take a 30cm length of sample piece & plate in the 5 point H. V. Test apparatus such that upper & lower electrodes are placed at the centre of the tape width wise. Take care that no flashover takes place between the two electrodes. 5.3.2 Phase probe is connected to upper electrode & earthing probe is connected to the lower electrode. 12
5.3.3 Uniformly go on increasing the H.V. A.C voltage till the Up to 4KV. Set the timer for 1 minute. No failure should occur during this period. 5.3.4 Repeat this procedure on all the reaming four points. 5.4 Breaking Strength in Kg / Cm Width (Clause 10.5) 5.4.1 5.4.2 5.4.3 5.4.4 Adjust the constant rate of traverse to 30cm / minute. Adjust the length on the tensile machine to 20cm. Keep the range of tensile testing machine to 100kgf. Tighten the test sample of 300mm length & 20mm width in the jaws of the tensile machine. The initial distance between the grip shall be adjusted to 200mm. 5.4.5 Press the “down” button of the tensile machine & observe the value on the tensile scale at the time, when the tape breaks. 5.4.6 Express the value in kgf . Note: - Sample piece should cut at the centre only. Specified value :- 20 kg /cm. (minimum) 5.5 Electrical strength test after ageing : (To be done only at tender stage) The impregnated cotton tape ( 30 cm in length ) when tested within 3 minutes after exposure to dry air at 90o 1oC for 120 hours, according to the method prescribed in IS-2584 shall withstand 4KV for one minute without failure. 6. Test Report Prepared by: Blank Format Approved by: DyEMTS/AEMTS DEMTS 13
IMPREGNATED PAPER SEPARATOR 1. Objective 2. Apparatus / material 3.Responsibility 4. Reference 5. Procedure TESTING OF IMPREGNATED PAPER SEPARATOR digital vernier caliper, oil test set, 0-5 kv. H.V. test, tensile machine Testing is to be done by Minimum T-5 grade staff. Spec : - MTS / STD – 29 / 09 / Rec. 1 dt. 21.08.02 I.S. – 6792 : 1972 I.S. – 10810 (PS) : 1964 I.S. – 2584 : 1963 5.1: Sampling : One sample per lot 5.2: PHYSICAL OBSERVATION 1) There should not be no. damage to the tin & also there should not be any oil leakage from the tin . 2) Open the tin & observe the oil level, if should be above the level of paper. 3) Count the no. of bundles in the tin . They should be 3 in No’s . 4) Count the no. of small cotton tape rolls in tin . They should be 10 in No’s . 5) Count the no. of papers in one bundle . They should be 35 in no’s. {minimum } 5.3: DIMENSIONAL ANALYSIS OF PAPER ( 3.3 to 3.4 ) 1) Measure the length the paper by digital vernier caliper . The length should be 270 mm 5 mm. 2) Measure the width of the paper by digital minimum caliper. The width should be 180 mm 5 mm. 3) Measure the thickness of the paper by digital vernier caliper . The thickness should be 0.1 mm 0.008 mm . 5.4: BREACK DOWN VALUE OF OIL (Electric strength) ( CL . 7) 1) Take out the oil testing pot from H.V. oil test set & rinse it with the oil in the Tin. 2) Adjust gap between the electrodes of pot to 2.5 1 mm . Check it with the ‘’Go” & “No Go” gauge Fill the oil in the tin in the testing pot , 2cm. above the level the of the electrode in the pot . Replace this pot (filled with oil) in the H.V. oil test set . 3) Allow the oil to settle down for at least 10 minuets . 4) Keep the forward / reverse switch on forward . 5) Start the machine supply & then H.V. supply voltage will gradually increase across the electrode at a rate 2kv / second . The pointer of the voltmeter will remain steady at a breakdown value . 14
6) Note down this value . Then push the forward / reverse switch to reverse . 7) Wait for 1 minute . Then again throw the forward / reverse switch to forward & start the H.V. supply . Note down this value . 8) Take six breakdown value of the 1 minute interval . 9) Average value of the six values should be more than 28kv to pass through this test . 5.5: BREAKDOWN VALUE OF PAPER (cl. 4.2) 1) Cut the sample paper of size 20 cm in length & 20 mm in width . 2) Put this paper on 5 point H.V. test apparatus & put the upper electrode on the paper at extreme & point . Lower 5 point are treated as earth & upper electrode as phase electrode . 3) Apply the ac high voltage through the 0-5 kv. H.V. test gradually increase the ac high voltage till the breakdown occurs . Note down this value . 4) Now move this upper electrode to next point & again note down the breakdown value . Repeat this an all 5 points . Find the average value of the all 5 values . 5) Divide this average value by the thickness of the paper to get the value in kv / mm thickness . This value should be 30 kv / mm thickness (minimum) . 5.6: TENSILE STRENGTH OF PAPER (4.1) 1) Cut the sample paper of size 27 cm on length & 15 mm in width . 2) Adjust the length on the tensile machine to 20 cm . 3) Keep the range to 100 kgf . 4) Tight the above sample piece in the jams of the tensile machine. 5) Press the down button of the tensile machine & observe the value on the tensile scale at a time of break of the paper . 6) Note down the value & express this value in Newton / mm thickness of paper . (multiply of the value of the tensile machine by 9.81 & divide this value by thickness of the paper ) 6. Test Report Blank Format Prepared by: Approved by: DyEMTS/AEMTS DEMTS 15
L.T.BITUMEN TAPE 1. Objective TESTING OF L.T.BITUMEN TAPE 5 kV H.V. Test set. Dial type micrometer, steel rule. Tensile machine, Multi cell Ageing Oven. Illuminated box Brass rod of 25mm thickness 3.Responsibility Testing is to be done by Minimum T-5 grade staff. IS 2448 (P-I) / 1963 – Specification for Adhesive Insulating 4. Reference Tapes for Electrical Purposes 2. Apparatus / material 5. Procedure 5.1 Sampling : 5 sample per lot of ( upto ) 5000 rolls are to be randomly selected for testing. 5.2 Dimensional Analysis (Clause 4.2 & 4.3 of IS-2448) 5.2.1 Equipment: Dial type micrometer, steel rule. Width: The width shall be measured at five places at random in a length of not less than one meter of tape from each sample roll & in no case shall the width vary by more than one millimeter from the nominal width measure the width by steel rule. Thickness: The thickness shall be measured with a dial type micrometer. Five measurements shall be made at random in a length of not less than one meter of tape from each sample roll. The average of these measurements (five) shall fall within the limits of 0.40 /- 0.05mm. 5.3 : Electrical Breakdown Strength (cl.6.1 & 10.9 of IS- 2448.) Equipment: - 0-5 kV H. V. Test set, 5.3.1 Suitable length of tape shall be taken from each sample roll and helically wound with 50% overlap for a distance of 150 mm along a clean polished cylindrical brass electrod of 25 mm dia. 5.3.2 The centre 50mm length of the wrapped tape shall then be covered with the metal foil held firmly in contact with the tape to form the outer electrode. 5.3.3 Voltage Uniformly increased to 1 KV in 1 minute. Which Shall be then maintain for a further 1 minute. No failure should occur. 16
5.4 Breaking Strength in Kg / Cm Width (Clause 10.5 of IS2448) 5.4.1 Equipment: Tensile machine, Adjust the constant rate of traverse to 30cm / minute. Adjust the length on the tensile machine to 20cm. Keep the range of tensile testing machine to 100kgf. Tighten the test sample of 300mm length & 20mm width in the jaws of the tensile machine. The initial distance between the grip shall be adjusted to 200mm. Press the “down” button of the tensile machine & observe the value on the tensile scale at the time, when the tape breaks. Express the value in kgf / cm width of tape. Note: - Sample piece should cut at the centre only. Specified value :- 7 kg /cm. (minimum) 5.5 Test of Pinholes(Clause 5.3 of IS-2448) Switch ON the illuminated box. Place a 3 meter test piece over the slot in the top of the illuminated box. The box shall be approximately200mm wide, 200mm high & 450mm long internally & the slot shall be 50 mm wide & 300mm long. The inside of the box shall be painted white & illuminated by a 25W lamp & the slot shall be covered with clear glass, set flush with the top of the box. Observe the no. of pin holes in the 3 meter length of the tape. No. of pin holes shall not exceed 15 for 20mm wide tape in 3 meter length. 5.6 Adhesion Test before Ageing (Resistance to Stripping) (Clause 10.7.2 of IS-2448) 5.6.1 Test Apparatus: The test apparatus shall consist essentially of a rigid cylindrical mandrel of 25mm diameter mounted horizontally on ball bearings; the length of the mandrel shall be sufficient to accommodated the full width of the tape & the bearings shall be such that the mandrel turns freely under a weight of 30 gm suspended by cotton thread wound in a single layer over the centre. Weight – Different size of weight up to 3.35 kg 250 gm weight hanger chalk, Stop watch, scale (1 meter) 5.6.2 Test Procedure: The adhesive properties of the tape before accelerated ageing shall be determined at a temperature of 27 /- 2oC. 17
A test length of one meter shall be taken from each sample roll. Approximately, 15cm of the tape shall first be uniformly wound in superimposed layers on to the centre of the mandrel. A load of 1.8kg / cm of width shall then be applied to the free end. The next 60 cm of the tape shall be wound on at a rate of 30cm/min & then the wound tape then held so loaded for three minutes. At the end of this time a weight of 0.70kg/cm width of tape shall be substituted for the heavier load & the mandrel freed. Under these conditions the tape shall unwind & after 100mm have unwound, the length of the tape that unwinds in the next minute shall be measured & recorded. This length shall not exceed 300mm. 5.7 Adhesion Test after Ageing (Resistance to Stripping) (Clause 10.7.2 of IS-2448) 5.7.1 Test Apparatus: 1) Multi cell Ageing Oven 2) The test apparatus shall consist essentially of a rigid cylindrical mandrel of 25mm diameter mounted horizontally on ball bearings; the length of the mandrel shall be sufficient to accommodated the full width of the tape & the bearings shall be such that the mandrel turns freely under a weight of 30 gm suspended by cotton thread wound in a single layer over the centre. Weight – Different size of weight up to 3.35 kg 250 gm weight hanger chalk, Stop watch, scale (1 meter) 5.7.2 Test Procedure: A specimen of tape similar to above shall be exposed to dry air at a temperature of 80 /-1oC for a period of 120 hours in the multi cell oven. After a rest period of not less than two hours & not more than six hours at 27 /- 2oC (during which period the aged specimens shall be protected from contact with foreign matter), the specimen shall satisfy the requirement of the test described as above except that the weight applied to unwind the tape shall be 0.35 kg/cm of width instead of 0.70kg/cm of width. 6. Test Report Prepared by: Approved by: DyEMTS/AEMTS DEMTS 18
PVC TAPE ( R,Y,B,N) 1. Objective Testing of PVC Tape ( R,Y,B,N) 0-5 KV HV Test set, Tensile machine. Scale, dial gauge 2. Apparatus / material 3.Responsibility Testing is to be done by minimum T-5 grade staff. IS NO: - 13262 / 1992 4. Reference Specification: - Tender Specification. 5. Procedure 5.1 Sampling : As per IS - 8402 Upto 100 101 to 500 501 to 1000 1001 and above 2 5 7 10 TEST CONDUCTED 1) Physical & Dimensional Analysis. 2) Electric breakdown strength. 3) Tensile strength & elongation. 5.4 : PHYSICAL AND DIMENSIONAL ANALYSIS 5.2.1 Observe the colour of the tape whether of as per tender specification or not. 5.2.2 Thickness: - With the help of the dial gauge measure the thickness. Our specified value is minimum 0.15mm. 5.2.3 Width: - With the help of steel rule measure the width. The tolerance as per clause 5.5 of 13262 is /- 1.0mm. Our specified value is 20mm. 5.3 : ELECTRIC BREAKDOWN STRENGTH (Tender Spec.) Equipment: - 0-5 kV H. V. Test set, 5 point H. V. Test apparatus. 5.3.1 Take a 30cm length of sample piece & plate in the 5 point H. V. Test apparatus such that upper & lower electrodes are placed at the centre of the tape width wise. Take care that no flashover takes place between the two electrodes. 5.3.2 Phase probe is connected to upper electrode & earthing probe is connected to the lower electrode. 5.3.3 Uniformly go on increasing the H.V. A.C voltage till the breakdown occurs. 5.3.4 Note down the breakdown voltage. 19
5.3.5 5.3.6 Test Report Prepared by: Repeat this procedure on all the reaming four points. Calculate the average of the above 5 breakdown voltages & divide it by the thickness of tape measured in mm , Thus we get breakdown voltage per mm thickness of tape. Our specified value is 2.5 kv AC / mm thickness (minimum). (sp. No. M10140102) 5.4 : TENSILE STRENGTH AND ELONGATION Equipment :- Tensile machine, 5.4.1 Cut the test sample of 20cm in length & 20mm in width. 5.4.2 Adjust the constant rate of . of 30cm / minute. 5.4.3 Adjust the distance between the jaws of the tensile machine to 12cm. 5.4.4 Keep the range in 100 kgf. 5.4.5 Clamp the sample piece in the jaws of the tensile machine. 5.4.6 Adjust the belt position respectively provided at the bottom on the back side of the tensile machine. Press the “down” button” of the tensile machine & observe the value on the tensile scale at the time of break & also note the length at the break. 5.4.7 Express the tensile strength in N / cm width tape. Calculation: Observed value on tensile scale in kgf x 9.81 Width of tape in cm 5.4.8 Express the elongation at break in %. Calculation: Final length – initial length x 100 Initial length Final length : - Length at break. Note: - Sample should break at the centre only. Blank Format Approved by: DyEMTS/AEMTS DEMTS 20
HRC FUSES 1. Objective TESTING PROCEDURE FOR HRC FUSES 2. Apparatus Loading Transformer, Digital Thermometer, Conductivity meter, Scale, Multi meter, fuse base, cables, bus-bars etc. / material 3.Responsibility Testing is to be done by Minimum T-5 grade ( Testing Assistant ) or Testing Engineer T8 grade. 4. Reference IS No. 13703 (Part I & II) , IS No. 9926 & BEST specification. . 5.1: Sampling: IS No. 9926 (Table-3) Cl.no. A-1.2 & A-2.1 (To be selected randomly) 5. Procedure Upto 150 5 151 to 500 8 501 to 1000 13 1001 to 3000 20 3001 & above 32 TESTS: 1. D.C. Resistance measurement. 2. Temp. rise test ( at rated current) 3. Non Fusing test (at 1.1 times rated current for 280 amps &1.25 times rated current for all other HRC fuses) 4. Fusing test ( at 1.4 times rated current for 280 amps. Fuse and 1.6 times rated current for all other HRC fuses) 5. Conductivity of blade contacts 6. Dimension analysis ( as per data sheet of IS-13703-P II) 21
5.2 D.C. RESISTANCE MEASUREMENT TEST (Cl.No 8.1.5.1 of IS 13703 (Part-I) 1993 In most of the cases it is noticed that value of d.c.resistance selected samples differ from one another (5% to 10%) hence it is advisable to connect 2 samples. one having minimum d.c resistance & other having maximum d.c resistance to check characteristic of Non-fusing, Fusing test & watt loss. Before the tests are commenced the internal resistance ‘R’ of all the samples shall be measured at the ambient air temperature of 20 5 C with a measuring current of not more than 0.1 In. The value ‘R’ shall be recorded in the test report. Note down the sample number of minimum & maximum ‘R’ from selected samples to measure watt loss, temperature rise test, non fusing & fusing test. 5.3: TEMPERATURE RISE TEST (Cl .no.7.3 of IS-13703-1.) Equipment / accessories :- Single phase Loading transforme
the test specimen overhangs downside. Place the roller centrally across the test specimen on one end of the plate and pass it by load at a constant speed four times over the test specimen on the plates twice in each direction, so that each traverse of 200 mm takes 10 to 12 seconds. The specimen shall be applied to the plate within 15
Abbreviations xxix PC Carli price index PCSWD Carruthers, Sellwood, Ward, and Dalén price index PD Dutot price index PDR Drobisch index PF Fisher price index PGL Geometric Laspeyres price index PGP Geometric Paasche price index PH Harmonic average of price relatives PIT Implicit Törnqvist price index PJ Jevons price index PJW Geometric Laspeyres price index (weighted Jevons index)
S&P BARRA Value Index RU.S.sell Indices: RU.S.sell 1000 Growth Index RU.S.sell 2000 Index RU.S.sell LEAP Set RU.S.sell 3000 Value Index S&P/TSX Composite Index S&P/TSX Venture Composite Index S&P/TSX 60 Canadian Energy TrU.S.t Index S&P/TSX Capped Telecommunications Index Sector-based Indices: Airline Index Bank Index
duppattas - six electric bell - two electric fans - three electric hand dryer-two electric iron - one electric lamps / wall-six electric organ-one electric shavers-two electric table lamp-two electric toaster-one empty receptacle
However, electric furnaces can accommodate central cooling easier than zonal electric heating, because the air conditioner can share the furnace’s ducts. Electric resistance heat can be provided by electric baseboard heaters, electric wall heaters, electric radiant heat, electric space heaters, electric f
Index numbers – Simple and weighted index numbers - Laspeyer’s and Pasche‘s index number – Fisher’s ideal index number- Marshall Edgeworth’s index number – Tests to be satisfied by an ideal index number- uses of index numbers. Recommended Texts: 1. S.P. Gupta – Statistical Methods 2.
This map does not display non-motorized uses, over-snow uses, . Fort Polk Kurthwood Cravens Gardner Forest Hill 117 28 10 107 1200 113 112 111 118 121 28 121 399 468 496 28 112 488 463 465 MAP INDEX 8 MAP INDEX 1 MAP INDEX 3 MAP INDEX 2 MAP INDEX 4 MAP INDEX 5 MAP INDEX 7 MAP I
DOW'S FIRE & EXPLOSION INDEX HAZARD CLASSIFICATION GUIDE SEVENTH EDITION a AIChE techrzical manual published by the American Institute of Chemical Engineers 345 East 47th Street, New York, NY 10017 0 1994 . C1.jpgFile Size: 788KBPage Count: 9Explore furtherDow Fire and Explosion Index (F&EI) AIChEwww.aiche.orgDOW FIRE AND EXPLOSION INDEX pdfeasystudy.infoDow Fire and Explosion Index (Dow F&EI) and Mond Indexwww.slideshare.netDow's Fire and Explosion Index Hazard Classification Guide .www.wiley.com(PDF) Dow's fire and explosion index: a case-study in the .www.researchgate.netRecommended to you based on what's popular Feedback
Trading A-B-C Patterns . Nick Radge . Many trend trading techniques rely on a breakout of price, that is, price continuing to move in the direction of the trend with uninterrupted momentum. However, price tends to ebb and flow back and forth within the larger trend which can in turn offer up other low risk entry points that are not as recognizable as a pattern or resistance breakout. Then .
