Skip to main content

Featured Post

Induction Motor Interview Questions with Answers | Part-1

4 comments

Construction of Cable and It's Classification

Construction of Cable and It's Classification is given below in detail


Construction of cable
Construction of Cable and It's Classification

  • A cable is the made by solid conducting material i.e. copper or aluminium and it's coated by insulation material.

Construction Of Cable


  • Cable is construct by various parts which is mentioned below:

  1. Conductor
  2. Insulation
  3. Metallic sheath
  4. Bedding
  5. Armouring
  6. Serving

  • Description of all the parts is described below in detail..

  1. Conductor


  • The main function of conductor is to carry the current in such a manner.

  • There are different types of conductor are used i.e copper, aluminium, tin, etc..

  • We can use gold and silver, but these metals are very costly.

  2. Insulation


  • Insulation is required between the conductor and earth.

  • There are different types of insulation are used such that PVC, paper, varnished rubber, metalized paper, etc...

  • Insulation protect the conductor.

  3. Metallic sheath


  • Moisture is effect the insulation, because of moisture electric strength will be decreases.

  • So it should be required that the moisture does not enter into insulation.

  • To avoid this effect, Sheath of lead is provided over the insulation.

  • If we used copper conductor then aluminium sheath is provided over the insulation.

  4. Bedding


  • Bedding is used for protect the sheath from mechanical damage.

  5. Armouring


  • Armouring protect the cable from mechanical damage.

  • To protect this two layers of galvanized steel wires are wound on the bedding.

  6. Serving


  • Serving is the layer of jute which is provided on the armouring.

Classification of Cables


  • Cable can be classified according to different bases. It can be classified below.

According to bases of number of core


  1.  1 core cable
  2.  2 core cable
  3.  3 core cable
  4.  3 (1/2) core cable
  5.  4 core cable

According to bases of voltage


  1. Low tension cable ( operating voltage upto 1000 V)
  2. High tension cable ( operating voltage upto 11000 V)
  3. Super tension cable ( operating voltage upto 33000 V)
  4. Extra High tension cable ( operating voltage upto 66000 V)
  5. Extra super voltage cable ( operating voltage upto 132000 V)

According to bases of application


  1. Power cable ( for the transmission and distribution of power)
  2. Control cable ( For transmission of control signal)

According to bases of insulation


  1. Paper insulated cable
  2. PVC insulated cable
  3. Polithelene insulated cable
  4. Rubber insulated cable
  5. Varnished cambric insulated cable

According to bases of sheath


  1. Aluminium sheathed cable
  2. PVC sheathed cable
  3. Lead sheathed cable
  4. Lead alloyed sheathed cable

According to bases of armouring


  1. Single layer steel wire armoured
  2. Double layer steel wire armoured
  3. Double layer steel tape armoured

According to bases of construction


  1. Low tension cable
  2. Screened or H type cable
  3. SL type cable
  4. HSL type cable
  5. Belted cable
  6. Super tension cable
  • A. Oil filled cable
  • B. Gas pressured cable 
Labels:

Comments

  1. UnknownMarch 30, 2020 at 4:23 PM

    Wonderful blog .....love it very much.. very good information short and qualitative

    ReplyDelete
  2. aliSeptember 19, 2022 at 5:32 PM

    excellent thankyou so much for taking the time
    and trouble to explain this
    cable railings

    ReplyDelete

Post a Comment

Popular posts from this blog

Introduction to Arduino | Pin Function of Arduino | Working Process of Arduino

Introduction to Arduino | Pin Function of Arduino | Working Process of Arduino Introduction to Arduino | Pin Function of Arduino | Working Process of Arduino Introduction To Arduino Arduino is an Italian company that designs and manufactures Open Source Hardware (Microcontroller) and Open Source software or IDE (Integrated Development Environment). Arduino hardware is such a programmable computerized platform, by working on which the user can combine the hardware and software and prepare the electronic brain according to his own and can control the electronic devices from that electronic brain. What is arduino? If you want to understand more easily, then we can say that Arduino microcontroller is an empty brain, in which you can upload memory by coding or programming through arduino software, so these are called open source. Arduino works like a CPU of a board computer. Right now the microcontroller of the arduino of this time that we can take up is lik...
Post a Comment
Read more

Variable Inductance Transducer | Classification Of Variable Inductance Transducer

Variable Inductance Transducer | Classification Of Variable Inductance Transducer Variable Inductance Transducer | Classification Of Variable Inductance Transducer These are based on a change in the magnetic characteristic of an electrical circuit in response to a measurand which may be displacement, velocity, acceleration etc. Variable inductive transducer may be classified as follows: 1.Self-generating type In this type voltage is generated because of the relative motion between a conductor and a magnetic field. These may be further classified as follows: (A)Electromagnetic type (B)Electrodynamic type (C)Eddy current type 2.Passive type In this type the motion of an object results in change in the inductance of the coils of the transducer. These may be further classified as follows: (A)Variable reluctance (B)Mutual inductance (C)Differential transfer type 1.Self-generating Type (A)Eleotromagnetic t...
1 comment
Read more

Induction Motor Interview Questions with Answers | Part-1

Induction Motor Interview Questions with Answers | Part-1 Induction Motor Interview Questions with Answers | Part-1 Q.1 The frame of an induction motor is made of (A) aluminium (B) silicon steel (C) closed grained cast iron (D) stainless steel (E) bronze Answer:  (C) closed grained cast iron Q.2 The stator frame is an induction motor is used to (A) hold the armature stampings in position (B) ventilate the armature (C) protect the whole machine (D) provide return path for flux Answer:  (A) hold the armature stampings in position Q.3 The stator core of a 3 phase induction motor is laminate in order to reduce the (A) eddy current loss (B) hysteresis loss (C) both hysteresis and eddy current loss (D) weight of the stator (E) windage and friction losses Answer: (A) eddy current loss Q.4 An induction motor works with (A) dc only (B) ac only (C) ac and dc both (D) none of these Answer:  (B) ac only Q.5 Which of the following statement associated with polyphase induction motor is...
4 comments
Read more