RAM RATNA WIRES LIMITED

RR Shramik, part of RR Global, is one of the leading conglomerates in the electrical and copper industry. For over 25 years, we have enjoyed unflinching patronage of our valued customers and are an established name in the Indian electrical industries, particularly known for our quality and commitment

RR Shramik is India’s only manufacturer of enameled copper wires that offers the widest range starting from 0.18 mm to 4.876 mm (SWG 06-52) with additional intermediate and mm Sizes. All our wires are UL certified, RDSO & BHEL approved along with RoHS (Halogen Free) & REACH compliance.

Products

  • Super Enamelled Copper Wires
    • Product Description
      We offer a superior range of enamelled copper wires aiming to cater the wide variety of applications in the industry ranging from a common motor rewinding to most critical applications like in automobiles. Enamelled winding wire is a film insulated copper (or aluminum) electrical conductor used in form of coil windings in motors, transformers, generators and other electromagnetic equipments. When wound into coils, and energized, enamelled winding wire creates an electromagnetic field, which is utilized to generate the required output form of energy – viz electrical to mechanical (or vice versa) electrical to electrical, and electrical to magnetic energy.
      PRODUCT RANGE & QUALITY SPECIFICATIONS
      Wire Type Properties Modified Polyester Modified Polyester Polyesterimide Dual Coated Wire PE/PEI + PAI
      Thermal Class
      Insulation
      Colour      		 130
      B
      Brown / Reddish-Golden      		 155
      F
      Light Brown to Dark Brown      		 180
      H
      Dark Brown (Mahogany)      		 200
      H+
      Reddish Brown to Golden
      Range – Copper
      Range – Aluminium      		 0.06 to 5.0 mm
      0.25 to 5.0 mm      		 0.06 to 3.0 mm
      0.25 to 5.0 mm      		 0.06 to 5.0 mm
      0.25 to 5.0 mm      		 0.06 to 4.0 mm
      0.25 to 5.0 mm
      Specifications – Copper IS 13730-34
      IEC 60317-34
      IS 13730-9      		 IS 13730-3
      IEC 60317-3 for 1.00 mm wire      		 IS 13730-8
      IEC 60317-8
      IS 13730-15      		 IS 13730-13
      IEC 60317-13
      NEMA MW 35A/35C
      Specifications – Aluminium IEC 60317-9 for 1.00 mm wire IEC 60317-15
      for 1.00 mm wire      		 IEC 60317-25 for Aluminium
      Mechanical Tests
      Flexibility
      Peel
      Abrasion Av.N
      Aluminium      		 1 x D
      N x D = 150
      10.4
      5.20      		 1 x D
      N x D = 130
      10.4
      –      		 1 x D
      N x D = 110
      10.9
      5.45      		 1 x D
      N x D = 110
      11.3
      6.75
      Thermal Tests
      Heat Shock
      Cut Through
      Heat Shock – Aluminium      		 6 x D 155°C – 30 min
      240°C – 2 min
      6.330 – 155°C – 30 min      		 2.24 x D 175°C – 30 min
      240°C – 2 min
      –      		 2.24 x D 200°C – 30 min
      300°C – 2 min
      3.350 – 200°C – 30 min      		 2.24 x D 220°C – 30 min
      320°C – 2 min
      15% Str – 3xd – 240°C
      Chemical Tests
      Solvent Resistance
      Refrigerant Resistant
      Solderability
      Transformer Oil      		 Good
      N.A.
      N.A.
      N.A.      		 Good
      N.A.
      N.A.
      N.A.      		 Very Good
      Very Good
      N.A.
      Excellent      		 Excellent
      Excellent
      N.A.
      Excellent
      Resistance
      Electrical Resistance
      Breakdown Voltage
      Cont. of Covering (Pin
      Holes)
      Tandent Delta – Bending Point      		 Within Range
      Above 8.0 KV
      Normally – Nil
      110 – 120      		 Within Range
      Above 8.0 KV
      Normally – Nil
      145 – 155      		 Within Range
      Above 8.0 KV
      Normally – Nil
      175 – 195      		 Within Range
      Above 8.0 KV
      Normally – Nil
      175 – 195
      Application Domestic equipments, pumps, motors, stabilizers, transformers, fans and auto electricals requiring high mechanical properties. General purpose rotating & static equipments like large pump motors, generators, air cooled transformers, voltage stabilizers, heavy duty domestic appliances like mixer – grinder, washing machines, where temperature is above class insulation B. Continuously rated heavy duty motors and tools, oil filled transformers, hermatic grade for AC and refrigerator compressor, furnace motors, and for all class insulation H applications. Special purpose machines like wind generators, large motors and generators, extra heavy duty equipments like crane motors with heavy shock loads, AC and refrigerator compressor windings.
      Advantages Balanced thermal properties. Very good flexibility and mechanical properties. High continuous operating temperature. Good chemical stability. Excellent dry & wet di-electric characteristics. Good thermal properties. High resistance to overloads. Good transformer oil resistance. Suitable for hermatic applications. Excellent smooth surface compatible for high speed winding. Very high thermal & overload resistance.
      Precautions Not suitable for oil filled transformers & hermatic motors. Not suitable for oil filled transformers & hermatic motors. Not recommended for highspeed winding applications. Excellent for A/C refrigerators and hermatic use.

      *These are only indicative values. Improvement is an ongoing process at RRWL and efforts are made to exceed average values.

      GENERAL DATA FOR ENAMELLED ROUND COPPER WIRES AS PER IS 13730-0-1/IEC 60317-0-1 (SWG)
      SWG Size mm Nom Conductor Tolerance ± mm Resistance Min. @ 20°C Ohm/mtr. Resistance Max. @ 20°C Ohm/mtr. Grade 2 (Medium Covering) For Grade 2 Wires SWG
      Min. Inc. Max. OD Elongation % BDV Volts Spring Back
      5 5.384 0.054 0.000729 0.000772 0.096 5.527 36 2500 5.0° 5
      5½ 5.131 0.052 0.000803 0.000851 0.095 5.273 36 2500 5.0° 5½
      6 4.877 0.05 0.000889 0.000942 0.094 5.018 36 2500 5.0° 6
      6½ 4.674 0.048 0.000967 0.001025 0.094 4.815 36 2500 5.0° 6½
      7 4.470 0.045 0.001058 0.001121 0.092 4.607 36 2500 5.0° 7
      7½ 4.268 0.045 0.001160 0.001230 0.092 4.405 36 2500 5.0° 7½
      8 4.064 0.043 0.001279 0.001357 0.092 4.201 36 2500 5.0° 8
      9 3.657 0.038 0.001580 0.001675 0.089 3.790 35 2500 5.0° 9
      9½ 3.454 0.036 0.001771 0.001878 0.086 3.583 35 2500 5.0° 9½
      10 3.251 0.034 0.001999 0.002120 0.086 3.380 35 2500 5.0° 10
      10½ 3.099 0.031 0.002203 0.002332 0.084 3.225 35 2500 5.0° 10½
      11 2.946 0.03 0.002436 0.002581 0.084 3.072 34 2500 5.0° 11
      12 2.642 0.027 0.003028 0.003209 0.081 2.764 34 2500 5.0° 12
      12½ 2.489 0.025 0.003413 0.003614 0.079 2.607 33 5000 5.0° 12½
      13 2.337 0.024 0.003870 0.004102 0.079 2.455 33 5000 5.0° 13
      13½ 2.184 0.024 0.004425 0.004703 0.077 2.299 33 5000 5.0° 13½
      14 2.032 0.02 0.005123 0.005421 0.077 2.147 33 5000 5.0° 14
      14½ 1.930 0.02 0.005673 0.006015 0.075 2.042 33 5000 5.0° 14½
      15 1.829 0.019 0.006317 0.006698 0.075 1.941 33 5000 5.0° 15
      15½ 1.727 0.018 0.007084 0.007513 0.073 1.836 32 5000 5.0° 15½
      16 1.626 0.017 0.007991 0.008476 0.073 1.735 32 5000 5.0° 16
      16½ 1.524 0.016 0.009096 0.009650 0.071 1.630 32 5000 30 16½
      17 1.422 0.015 0.010447 0.011085 0.071 1.528 32 5000 30 17
      17½ 1.320 0.013 0.012140 0.012846 0.069 1.422 32 5000 34 17½
      18 1.219 0.013 0.014212 0.015088 0.067 1.318 31 5000 37 18
      18½ 1.118 0.011 0.016924 0.017907 0.065 1.215 30 5000 41 18½
      19 1.016 0.0111 0.020449 0.021730 0.065 1.113 30 5000 41 19
      19½ 0.965 0.01 0.022692 0.024061 0.063 1.059 30 5000 45 19½
      20 0.914 0.01 0.025267 0.026852 0.063 1.008 30 5000 45 20
      20½ 0.864 0.009 0.028305 0.030018 0.060 0.953 29 5000 48 20½
      21 0.813 0.009 0.031926 0.033497 0.060 0.902 29 5000 48 21
      21½ 0.762 0.008 0.036384 0.038599 0.056 0.846 28 4900 43 21½
      22 0.711 0.008 0.041729 0.044402 0.056 0.795 28 4900 43 22
      22½ 0.660 0.007 0.048489 0.051462 0.053 0.739 28 4800 47 22½
      23 0.610 0.006 0.056850 0.060151 0.050 0.684 27 4800 50 23
      23½ 0.584 0.006 0.061971 0.065684 0.050 0.682 27 4800 50 23½
      24 0.559 0.006 0.067576 0.071757 0.047 0.629 26 4600 44 24
      25 0.508 0.006 0.081652 0.087078 0.047 0.578 26 4600 44 25
      25½ 0.483 0.005 0.090584 0.096042 0.045 0.570 25 4600 47 25½
      26 0.457 0.005 0.101067 0.107408 0.045 0.523 25 4600 47 26
      27 0.417 0.005 0.121134 0.129277 0.042 0.480 25 4400 48 27
      27½ 0.397 0.005 0.133487 0.142805 0.042 0.475 24 4400 50 27½
      28 0.376 0.005 0.148608 0.159429 0.042 0.435 24 4400 50 28
      29 0.345 0.005 0.176098 0.189827 0.038 0.401 23 4300 53 29
      30 0.315 0.004 0.211987 0.226879 0.035 0.367 23 4100 55 30
      31 0.295 0.004 0.241295 0.259137 0.035 0.347 23 4100 55 31
      32 0.274 0.004 0.279127 0.301015 0.033 0.323 22 4000 53 32
      33 0.254 0.004 0.324080 0.351104 0.033 0.303 22 4000 53 33
      34 0.234 0.004 0.380835 0.414820 0.032 0.281 22 3900 56 34
      35 0.213 0.003 0.462364 0.497596 0.029 0.255 21 3700 59 35
      36 0.193 0.003 0.561538 0.607866 0.027 0.232 21 3500 62 36
      37 0.173 0.003 0.696411 0.759307 0.025 0.210 20 3300 65 37
      38 0.152 0.003 0.897900 0.988423 0.023 0.186 19 3200 67 38
      39 0.132 0.003 1.183651 1.318669 0.021 0.163 18 3000 67 39
      40 0.122 0.003 1.380611 1.549606 0.019 0.155 17 2800 70 40
      41 0.112 0.003 1.631156 1.846980 0.017 0.137 17 2700 73 41
      42 0.102 0.003 1.956648 2.238952 0.017 0.127 17 2700 73 42
      43 0.091 0.003 2.441381 2.833674 0.016 0.115 16 950 73 43
      44 0.081 0.003 3.057262 3.066833 0.015 0.107 15 900 77 44
      45 0.071 0.003 3.939379 4.745669 0.012 0.091 13 700 – 45
      46 0.061 0.003 5.266612 6.523179 – 0.081 12 700 – 46
      47 0.051 0.003 7.397819 9.524294 – 0.068 10 650 – 47
      48 0.041 0.003 11.142583 15.196657 – 0.056 9 600 – 48
      49 0.031 0.003 18.660935 27.989761 – 0.041 8 375 – 49
      50 0.025 0.003 27.515358 45.338786 – 0.034 7 300 – 50

      * These are only indicative values. Improvement is an ongoing process at RRWL and efforts are made to exceed average values.

  • Fine And Ultra-fine Enamelled Copper Wires
    • Product Description
      RR Shramik offers an industry-leading range of high quality fine and ultra-fine enamelled copper wires. The enamelled wire properties governing proper selection not only require consideration of the end use conditions but system compatibility and ease of use in production.
      Solderablility, abrasion resistance, bondability, flexibility, insulation builds, etc. are all typical production and design considerations. Higher temperature requirements and more complex systems dictate the need for knowledgeable selectivity of enamelled wires. In addition to the product featured in this catalogue, we can manufacture custom insulated wires to meet your requirements.
      SALASAR COPPER ENAMELLED WIRES TYPE
      Product Name / Code RR Shramik SSFC 155°C RR Shramik SSFC-N 155°C
      General Description Modified Polyurethane Modified Polyurethane with Polyamide Overcoat
      Standards – IEC (including the following norms) IEC 60317-20 IEC 60317-19 / IEC 60317-20
      NEMA (including the following norms) MW 79-C MW 80-C
      JIS (including the following norms) JIS 3202 –
      Diameters Available 0.010 mm – 1.6 mm 0.010 mm – 0.700 mm
      Properties Very Good Solderability & High Thermal Properties Very Good Solderability & High Thermal Properties
      Applications Small Transformers, Linear Motors, Relays, Solenoids, Small Motors, Clock Coils, Watch Coils, Transformers, Magnetic Heads, Instruments Appliance Motors, Encapsulated Coils, Solenoids, Transformers, Toroids
      UL Approved Yes Yes
      Thermal Values of Sole Coat
      Temp. Index 20,000 h acc. to IEC 60172
      Cut Through Temperature 157.9°C 157.9°C
      0.05 mm : acc. to 0.250 mm IEC 60851-6.4 ≥200°C ≥200°C
      Typical Value (RR Shramik) ≥225°C ≥225°C
      0.050 mm : acc. to 0.450 mm IEC 60851-6.4 ≥200°C ≥200°C
      Typical Value (RR Shramik) 230°C 230°C
      Heat Shock
      0.050 mm : acc. to 0.250 mm IEC 60851-6.3 175°C 175°C
      Typical Value (RR Shramik) 190°C 190°C
      0.251 mm : acc. to 0.450 mm IEC 60851-6.3 ≥175°C ≥175°C
      Typical Value (RR Shramik) 180°C 180°C
      Electrical Values
      High Voltage Continuity for Grade 1 wires
      0.050 mm – acc. to 0.080 mm IEC 60851-5.1 ≤40 ≤40
      Typical Value (RR Shramik) 0 0
      0.081 mm – acc. to 0.125 mm IEC 60851-5.2 ≤40 ≤40
      Typical Value (RR Shramik) 1 1
      0.125 mm – acc. to 1.600 mm IEC 60851-5.2 ≤25 ≤25
      Typical Value (RR Shramik) 1 1
      Break Down Voltage (at 20°C, 35% Humidity)
      0.050 mm – Typical Value (RR Shramik) 220 V/μm 220 V/μm
      0.081 mm – Typical Value (RR Shramik) 210 V/μm 200 V/μm
      0.125 mm – Typical Value (RR Shramik) 180 V/μm 180 V/μm
      Pinholes acc. to JIS with 0.45 mm: 0% Elongation Good Good
      Mechanical Values
      Elongation for Grade 1 Wires
      0.05 mm : acc. to IEC 60851-3 Part 3.1 ≤14% ≤14%
      Typical Value (RR Shramik) 22% 22%
      0.800 mm : acc. to IEC 60851-3 Part 3.1 ≥29% ≥29%
      Typical Value (RR Shramik) 38% 38%
      Solderability
      Solderability for Grade 1 Wires
      0.05 mm : acc. to IEC 60851-3 Part 4.5 2.0s / 390°C 2.0s / 390°C
      Typical Value (RR Shramik) 0.9s / 390°C 0.9s / 390°C
      0.800 mm : acc. to IEC 60851-3 Part 4.5 8.0s / 390°C 8.0s / 390°C
      Typical Value (RR Shramik) 5.0s / 390°C 5.0s / 390°C
      Chemical Compatibility
      Compatibility to Standard Solution
      Pencil Hardness acc. to IEC 60851-4.3 with treatment 4H 4H
      Pencil Hardness acc. to IEC 60851-4.3 without treatment 4H 4H
  • Submersible Winding Wires
    • Product Description

      We also offer poly wrapped winding wire commonly known as “Submersible Copper Winding Wire”. The copper conductor is wrapped with thin polyster film and Biaxial oriented poly proplyene (BOPP) films. The most modern plant with sophesticated wrapping heads and in line continuous heat shrinkage furnace is installed to get uniform covering. A complete quality assurance testing by instruments covering all governing standards is available. The test standards followed are IS 8783:1995.

      Application

      Used in submersible pumps motors of all sizes for domestic and industrial application.

      Packaging

      Available in coil form with suitable length as per size, in polythene bag and packed in inner and outer corrugated boxes.

      Special Salient Features:

      • Saves energy – ETP grade high conductivity annealed copper used
      • Less current leakage – No air gap between the films.
      • Tear resistant – High mechanical strength – High tenstile strength
      • Each coil tested at 3500 V
      • Heat shock test – at 150°C
      • Easy winding – Resistance annealed copper and controlled OD
      • Manufactured by ultra modern automatic plant as per IS 8783 (Part 4 / Sec.3)

      Testing Facilities

      The quality assurance having all the testing facilities with ultra modern, high precision instruments and rigorous testing plans. Details of test which conforms to IS 8783 (Part 4 / Sec. 3) is as follows.

      Sr. No. Name of the Tests Units Instruments Used
      1 Size (Diameters) mm Micrometer
      2 Elongation Percentage Tensile tester
      3 Conductor resistance Ohm / KM Resistance meter
      4 Volume resistivity Ohm – cm Million mega meter
      5 High voltage test kV High voltage tester
      6 Thermal ageing Change in elongation and tensile Ageing oven and tensile tester
      7 Shrinkage test Percent Circulating hot air oven
      8 Water absorption mg / cm² Vacuum oven and pump desiccator
      9 Hot deformation Percent Circulating hot air oven
      10 Heat shock test No sign of cracks / scales / separation of layers Circulating hot air oven and mandrels
      GENERAL PROPERTIES
      Sr. No. Nominal conductor diameter (mm) Tolerance ± (mm) Nominal resistance Ohms/KM at 20°C Over all diameter Weight of poly wrapped (kg/km) Elongation minimum (%)
      1 0.40 0.004 137.15 0.80 1.467 24
      2 0.50 0.005 87.78 0.90 2.154 25
      3 0.60 0.006 60.96 1.00 2.980 26
      4 0.70 0.007 44.78 1.10 3.946 28
      5 0.80 0.008 34.29 1.20 5.052 28
      6 0.90 0.009 27.09 1.30 6.298 29
      7 1.00 0.010 21.94 1.40 7.683 30
      8 1.10 0.011 18.14 1.50 9.208 30
      9 1.20 0.012 15.24 1.60 10.873 31
      10 1.30 0.013 12.98 1.70 12.678 32
      11 1.40 0.014 11.20 1.90 14.891 32
      12 1.50 0.015 9.75 2.00 16.989 32
      13 1.60 0.016 8.57 2.10 19.227 32
      14 1.70 0.017 7.59 2.20 21.605 32
      15 1.80 0.018 6.77 2.30 24.122 32
      16 1.90 0.019 6.08 2.40 26.780 32
      17 2.00 0.020 5.49 2.50 29.576 33
      18 2.10 0.021 4.98 2.60 32.513 33
      19 2.20 0.022 4.53 2.70 35.589 33
      20 2.30 0.023 4.15 2.80 38.805 33
      21 2.40 0.024 3.81 2.90 42.161 33
      22 2.50 0.025 3.51 3.00 45.656 33
      23 2.60 0.026 3.25 3.10 49.291 34
      24 2.70 0.027 3.01 3.20 53.066 34
      25 2.80 0.028 2.80 3.30 56.980 34
      26 2.90 0.029 2.61 3.40 61.035 34
      27 3.00 0.030 2.44 3.50 65.228 34

      * These are only indicative values.
      Improvement is an ongoing process at RRWL and efforts exceed average values.