IMPLEMENTACIÓN DE LA METODOLOGÍA DE REABANDONO EN EL POZO CIRA L1

5.9 PVC PVC WIRESWIRES

 Figure

 Figure 5.9.(i) P5.9.(i) PVC WirVC Wireses

Polyvinyl chloride

Polyvinyl chloride, (IUPAC, (IUPAC Poly (chloroethanediyl)Poly (chloroethanediyl)) commonly abbreviated) commonly abbreviatedPVCPVC,, is a thermoplastic polymer.

It is a vinyl polymer constructed of repeating vinyl groups (ethenyls) having one of  It is a vinyl polymer constructed of repeating vinyl groups (ethenyls) having one of  their hydrogens replaced with a chloride group.Polyvinyl chloride is the third most their hydrogens replaced with a chloride group.Polyvinyl chloride is the third most widely

widely produceproduced pd plasticlastic, , after after polyetpolyethylene hylene and and polyprpolypropyleneopylene. . PVC PVC is is widely widely usedused in construction because it is cheap, durable, and easy to assemble. PVC production is in construction because it is cheap, durable, and easy to assemble. PVC production is expected to exceed 40 million tons by 2016.It can be made softer and more flexible by expected to exceed 40 million tons by 2016.It can be made softer and more flexible by the addition of plasticizers, the most widely used being phthalates. In this form, it is the addition of plasticizers, the most widely used being phthalates. In this form, it is used in clothing and upholstery, and to make flexible hoses and tubing, flooring, to used in clothing and upholstery, and to make flexible hoses and tubing, flooring, to ro

roofiofing ng memembmbraranesnes, , and and elelecectrtricaical l cacablble e insinsululatatioion. n. It It is is alalso so cocommmmonlonly y useusedd in

in figfiguriurines nes and and in in inflinflataatable ble proproductducts s sucsuch h as as watwaterberbedseds, p, pool ool toytoys, s, and and inflinflatabatablele structures.

structures.

5.10 RELAYS

5.10 RELAYS

We are using relay in our project to switch ON/OFF any electrical devices. These relay We are using relay in our project to switch ON/OFF any electrical devices. These relay are switched ON/OFF by sending control signal from microcontroller. The output from are switched ON/OFF by sending control signal from microcontroller. The output from these relay can be used to operate any electrical device of suitable volt-ampere rating. these relay can be used to operate any electrical device of suitable volt-ampere rating.

A

Arelayrelayis an electrically operated switch. Many relays use an electromagnet to operateis an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism mechanically, but other operating principles are also used. a switching mechanism mechanically, but other operating principles are also used. Relays are used where it is necessary to control a circuit by a low-power signal (with Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it to another. Relays

to another. Relays were used extensively in were used extensively in telephtelephone exchanges and one exchanges and early computerearly computerss to perform logical operations.

to perform logical operations.

A type of relay that can handle the high power required to directly drive an electric A type of relay that can handle the high power required to directly drive an electric motor is called a contactor. Solid-state relays control power circuits with no moving motor is called a contactor. Solid-state relays control power circuits with no moving  parts

 parts, , insteainstead d using using a a semicosemiconductor nductor device device to to perfoperform rm switcswitching. hing. Relays Relays withwith calibrated operating characteristics and sometimes multiple operating coils are used to calibrated operating characteristics and sometimes multiple operating coils are used to  prote

 protect ct electrelectrical ical circuicircuits ts from from overloaoverload d or or faultfaults; s; in in modermodern n electrelectric ic power power systesystemsms these functions are performed by digital instruments still called "protective relays". these functions are performed by digital instruments still called "protective relays".

 ADVA

 ADVANTAGENTAGES OF RELAS OF RELAYS YS 

•

•Relays can switch AC and DC, transistors can only switch DC.Relays can switch AC and DC, transistors can only switch DC. •

•Relays can switch higher voltages than standard transistors.Relays can switch higher voltages than standard transistors. •

•Relays are often a better choice for switching large currents (> 5A).Relays are often a better choice for switching large currents (> 5A). •

•Relays can switch many contacts at once.Relays can switch many contacts at once.

 DISA

 DISADVANTDVANTAGES OF REAGES OF RELAYS LAYS 

•

•Relays are bulkier than transistors for switching small currents.Relays are bulkier than transistors for switching small currents. •

•Relays cannot Relays cannot switcswitch h rapidlrapidly (except reed y (except reed relays)relays), , transistransistors can tors can switcswitch h many timesmany times

 per se  per second.cond.

•