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PTFE Cable
 
Technical Data of PTFE (Teflon) cable
PTFE cables have outstanding Mechanical & electrical properties. These are heat resistant. Its properties qualify them for an ever-widening range of wiring a applications, they are used in many situations, where temperature is between -65°C and +250°C.

In most adverse uses, where chemical fumes and liquids would render all other cables cables useless, PTFE is the most well-known and durable polymer and has been used in the cable industry for many years, It’s outstanding dielectric properties, even at elevated temperatures, make it most suitable for insulation of cables.
 
Construction:-
These cables consist of :-
  1. A solid or stranded conductor of either
    - Silver plated copper (SPC) or
    - Silver plated copper clad steel (SCCS) or
    - Anealed bare Copper.
  2. A dielectric layer or wrapped and sintered PTFE tape.
  3. one or two braids of silver plated copper wire [In case of Shielded cables]
  4. An overaii jacket of:
    a. Wrapped and sintered PTFE tape.
    b. One or two wraps of PTFE tape, one or more glass fiber braids and coated
          with a special high temperature varnish.
 
Performance Characteristics:
  • High dielectric values of any known flexible insulator resulting in excellent space and weight saving.
  • Wide operating temperature range-65°C to + 250°C.
  • Inert to most chemicals and fluids even at elevated temperature and pressure.
  • Unaffected by oils, lubricants, hydraulic fluids and aircraft / rocket fuel.
  • Insulation by tape wrapping and sintering process-ensures uniform insulation thickness eith near extruded finish.
  • Non -flammable, non - toxic, resistant to solder iron damage.
  • Suitable for high frequency operation.
  • Immune to agene, fungus and water absorption.
  • Resistance to UV radiation and stress creaking.
  • High strain and abrasion resistance.
Technical Specification:
The PTFE equipment wires are as per US military MIL- W – 16878D and Indian defence specifications JSS 51034.92. As per these standards, equipments wires are classified in three main working voltage grades. i.e.
250 v ac rms (ET) grade
600 V acrms (E) grade
1000 V acrms (EE) grade
The Main Technical Features are as follows:
Fine wire strands. Made from silver plated electrolytic grade copper wire, stranded to from perfectly round conductor. Teflon (PTFE) concentricity of inner conductor, available in bright eleven solid colors & combination of colors as bi colors.
Insulation radial thickness.
ET-   250 V ACrms Grade 0.15 mm Nominal
E -    600 V ACrms Grade 0.25 mm Nominal
EE -  1000V ACrms Grade 0.40 mm Nominal.
 
Electrical Testing
Grade Spark Testing Dielectric Testing

250 V

2500 V ACrms

1500 V ACrms

600 V

3400 V ACrms

2000 V ACrms

1000 V

5000 V ACrms

3000 V ACrms
 
Other Specifications:
Minimum bending Rdius : 10 x cable dia
Temperature range : -65°C to 200°C for silver plated
Conductor : -65°C to 260°C for Nickle/Bare
Conductor
Insulation Resistance : 2 G ohm x Km.
Radiation Resistance : 3 x 107 CJ/Kg.
Dielectric Constant
Hz and a temp		 : 2.1 in the range from OHz to 109
  range - 190°C to +205°C
 

Coaxial Cables With PTFE Dielectric for High temperature and high frequency applications.

These high quality cables are mainly designed for high frequency connections operating at high temperature or on equipment expected to work under difficult conditions without failure

 
Technical specification: As per MIL - C- 17 OR JSS 51100
REF.MIL-C-17-RG 142 165/U 187A/U 188A/U 195A/U 196A/U 225/U 400/U
Ordering Number F142 F165 F187 F188 F195 F196 F225 F400
Conductor
Stranding 1 7 7 7 7 7 7 7
Material SCCS SPC SCCS SCCS SCCS SCCS SPC SPC
OD (mm) 0.94 2.45 0.3 0.51 0.31 0.31 2.40 1.0
Dielectric
Material PTFE PTFE PTFE PTFE PTFE PTFE PTFE PTFE
OD (mm) 2.95 7.24 1.52 1.52 2.59 0.86 7.2 2.95
Shield Material
Outer PTFE PTFE PTFE PTFE PTFE PTFE PTFE PTFE
Inner SPC - - - - - SPC SPC
Jacket
Material PTFE 2FG Braid PTFE PTFE PTFE PTFE PTFE PTFE
OD (mm) 2.95 7.24 1.52 1.52 2.59 0.86 7.2 2.95
Max. Weight (gm/mtr.) 52 170 15 15 30 8 280 56
Service Trmperature
Low (°C) -55 -55 -55 -55 -55 -55 -55 -55
High (°C) +200 +200 +200 +200 +200 +200 +250 +200
Impedence 50 50 75 50 95 50 50 50
Nominal Capacitance pf/mtr. 97 96.8 65.6 95 52.5 95 97 97
Nominal Attenuation db/100 mtr.
@10 MHz 3.4 2 18.2 15 11.3 19.3 2 3.4
@400 MHz 25.8 15.5 68.9 57.5 55.8 95 15.5 25.8
@1GHz 48 26 83 107 58 158 26 48
@10GHz 340 126 >350 >350 303 >350 126 340
Maximum
@10 MHz 6000 15000 1400 770 2000 640 15000 6000
Power (Watts)
@499 MHz 810 2000 320 270 400 120 2000 810
@1GHz 430 1200 190 155 250 74 1200 430
@10Ghz 63 260 - - 45 - 260 63
Velocity of propagation % 69 69 69 69 69 69 69 69
 
PTFE (TEFLON®) INSULATED WIRES
(As per LCSO & C-DOT APPROVED specifications)
 
Sr.
No.		 Size in AWG No.of strands/dia of each strand(mm) Parameters of conductor (Nominal)
(AS per JSS 51034)		 Nominal Dia of Insulated wire
Dia. (mm) Cross section (sq.mm.) Resistance ohm/km at 20°C Elongation (Min) ET (250v) AC E
(600v)
AC		 EE
(1000v)
AC
1. 32/7/40 7/0.08 0.24 0.0340 570.9 5.5 0.56 0.74 1.00
2. 30/1 1/0.25 0.25 0.0507 356.4 9.0 0.56 0.75 1.00
3. 30/7/38 7/0.1 0.30 0.0568 332.3 5.5 0.61 0.81 1.07
4. 28/1 1/0.32 0.32 0.0806 224.4 9.0 0.63 0.84 1.09
5. 28/7/36 7/0.13 0.38 0.0887 210.5 5.5 0.69 0.89 1.14
6. 26/1 1/0.4 0.40 0.1282 140. 9.0 0.71 0.90 1.15
7. 26/7/34 7/0.16 0.48 0.1409 133.7 9.0 0.79 0.99 1.24
8. 26/19/38 19/0.1 0.50 0.1540 126.7 5.5 0.79 0.99 1.24
9. 24/1 1/0.5 0.50 0.2047 88.4 15.5 0.81 1.00 1.25
10. 24/7/32 7/0.2 0.60 0.2270 83.2 9.0 0.91 1.12 1.37
11. 24/19/36 19/0.13 063 0.2407 80.2 9.0 0.91 1.12 1.37
12. 22/1 1/0.65 0.65 0.3243 56.1 20.0 0.95 1.15 1.40
13. 22/7/30 7/0.25 0.75 0.3547 52.5 13.5 1.07 1.27 1.52
14. 22/19/34 19/0.16 0.80 0.3820 49.8 9.0 1.07 1.27 1.52
15. 20/1 1.08 0.80 0.5168 34.7 20.0 1.10 1.30 1.53
16. 20/7/28 7/0.32 0.97 0.5630 33.0 13.5 1.27 1.47 1.73
17. 20/19/32 19/0.2 1.00 0.6162 30.3 9.0 1.27 1.47 1.73
18. 18/7/26 7/0.4 1.20 0.8969 20.7 13.5 - 1.75 2.00
19. 18/19/30 19/0.25 1.25 0.9627 19.1 13.5 - 1.75 2.00
20. 16/19/29 19/0.29 1.45 1.2293 14.9 13.5 - 2.03 2.25
21. 16/37/32 37/0.2 1.40 1.200 15.0 13.5 - 2.00 2.20
22. 15/19/28 19/0.32 1.60 1.5272 12.5 13.5 - 2.15 2.40
23. 14/19/27 19/0.36 1.83 1.9412 9.5 13.5 - 2.42 2.69
24. 14/37/30 37/0.25 1.75 1.8886 10.0 13.5 - 2.35 2.60
25. 13/19/26 19/0.4 2.00 2.3864 7.8 13.5 - 2.60 2.85
26. 12/19/25 19/0.45 2.25 3.0848 6.0 13.5 - 2.90 3.17
27. 12/37/28 37/0.32 2.24 2.9742 6.5 13.5 - 2.85 3.12
28. 11/19/24 19/0.5 2.50 3.7287 5.0 13.5 - 3.15 3.40
29. 10/19/22 19/0.65 3.20 6.3015 3.0 - - 3.80 4.10
30. 10/37/26 37/0.4 2.82 4.7397 3.9 13.5 - 3.40 3.68
31. 8/133/29 133/0.29 4.29 8.6054 2.2 13.5 - - 5.31
32. 6/133/27 133/0.36 5.41 13.5889 1.4 13.5 - - 6.68
 

Note : Single core PTFE wires can be manufactured in single and bi-colours versions,
please specify the required colours.
 
 
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