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HT Cables/MT Cables

HT Cables/MT Cables
HT Cables/MT Cables
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Product Code : 02
Product Description


HT Cables or High Tension Cables are cable defined as per IS 7098 Part II having voltage grade from 3.3kv to 33kv. Cables of similar voltage range are also defined as MV Cables or Meduim Voltage Cables as per IEC-60502 part 2, BS-6622 & BS-7835

Traditionally Paper/ Oil Insulation systems have been used in HT Cables/ MV Cables. However since the advent cross-linked polyethylene (XLPE) have been used as an insulation material. In most countries the use of polyethylene have been limited to the cross-linked version (XLPE) due to major advantage XLPE

Cross-linked polyethylene is also considered to be the material of choice due to its ease of processing and handling as compared to paper/oil. In addition, the low dielectric losses of cross-linked polyethylene which become increasingly important with increase in voltage as well as high intrinsic electrical strength makes it the favored material for the range of medium & high-voltage applications.


Power Cables are generally selected considering the application. However, following factors are important for selection of suitable cable construction required to transport electrical energy from one end to the other.

  • Maximum operating voltage
  • Fault level
  • Load to be carried
  • Possible overloading duration & magnitude
  • Route length and voltage drop
  • Mode of installation considering installation environment such as ambient & ground temperature chemical & physical properties of soil
  • Flame retardant properties


Since a wide range of HT cables are manufacture it is important that while placing inquiries or orders, as much information as possible shall be given, so that the inquiries and orders are dealt quickly and efficiently.

Voltage Grade:

Voltage grade of HT cable as per following table



1.0 kV

1.1 kV

3.6/6(7.2) kV

3.8/6.6 kV

6.0/10(12) kV

6.35/11 kV

12/20(24) kV

12.7/22 kV

18/30(36) kV

19/33 kV

Relevant Indian Standard:

  • IS 7098(Part-2)-1985 or International standard-
  • IEC- 60502(Part-2), BS-6622 & BS:7835.
  • Any other International standards or as per customer
  • specification for e.g. UL 1072 ANSI/ACEA, etc.
  • Number of Cores - Single & Three.


  • Size-35 to 1000 in Single Core Cables & 35
  • to 400 in 3Core cables.
  • Conductor Material - Copper / Aluminium
  • Type of Insulation -XLPE
  • Type of Inner Sheathing - PVC Wrapped / PVC Extruded.
  • Type of Armour - Unarmoured /Strip Armoured / Round Wire Armoured.

Type of Outer Sheath:

  • PVC / Flame Retardant / Flame Retardant Low Smoke /
  • Zero Halogen (LSOH).
  • Length of cable required in one drum length.
  • General Construction - HT Cables upto 33 KV


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