For Skill

Electrical and Electronic

CAPACITOR

DEFINATION :-

A capacitor is made by using a dielectric material between two or more independent conductor plates.

The capacity of a capacitor depends on the number of plates, thickness of the dielectric material, distance between the plates, size of the plates and the dielectric material used.

There are three main types of capacitors:-

1.Fixed capacitor

2.Semi Variable capacitor

3.Variable capacitor.

1.Fixed capacitor

The capacity of the capacitor cannot be increased or decreased. Based on the dye-electric material used in it, its name is as follows.-

paper capacitor

mica capacitor

ceramic capacitor

Dielectric and wet electronic capacitors

2.Semi Variable capacitor

The value of this type of capacitor can be increased or decreased by rotating the screw attached to it with the help of a screw driver.

According to capacity, these are of two types:

– 3PF to 30 PF and 4PF to 70 PF are called trimmers.

– Peder are available with capacity of 400PF, 750PF, 1000PF.

3.Variable capacitor

These are also called gang capacitors. Its value can be increased or decreased easily.

Some Electrical & Electronic Abbreviations with Full Forms :-

Abbreviations

Full Forms

AC

Alternative Current

DC

Direct Current

A

Ampere

mA

Milli Ampere

µA

Micro Ampere

V

Volt

KV

Kilo Volt

KVA

Kilo Volt Ampere

I

Current

W

Watt

KW

Kilo Watt

MW

Mega Watt

GW

Giga Watt

KWH

Kilo Watt Hour

Ω

Ohm

KΩ

Kilo Ohm

MΩ

Mega Ohm

GΩ

Giga Ohm

CKT

Circuit

DCDB

Direct Current Distribution Board

PT

Potential Transformer

PDP

Power Distribution Panel

PCC

Power Control Centre Panel

DP

Double Pole

AVC

Automatic Volume Control

AGC

Automatic Gain Control

CRT

Cathode Ray Tube

AF

Audio Frequency

ANT

Antenna

FM

Frequency Modulation

AM

Amplitude Modulation

AMP

Amplifier

L

Inductance

R

Resistance

IF

Intermediate Frequency

IFT

Intermediate Frequency Transformer

IC

Integrated Circuit

H

Henry

MH

Milli Henry

µH

Micro Henry

EHT

Extra High Tension

Q

Charge

f

Frequency

F

Farad

PF

Pico Farad

KPF

Kilo Pico Farad

MF or µF

Micro Farad

NF

Nano Farad

C/S or Hz

Cycle per second or Hertz

KC/S or KHz

Kilo Cycle per second or Kilo Hertz

MC/S or MHz

Mega Cycle per second or Mega Hertz

MC/S or MHz

Mega Cycle per second or Mega Hertz

LOT

Line Output Transformer

LFC

Low Frequency Choke

RF

Radio Frequency

LT

Low Tension

HT

High Tension

ST

Super Tension

LS

Loud Speaker

LF

Low Frequency

HF

High Frequency

LED

Light Emitting Diode

USB

Universal Serial Bus

SP Switch

Single Pole Switch

SPST Switch

Single Pole Single Throw Switch

SPDT Switch

Single Pole Double Throw Switch

DPDT Switch

Double Pole Double Throw Switch

STR

Switching Transistor Regulator

SMPS

switched-Mode Power Supply

SAW Filter

Surface Acoustic Web Filter

VHF

Very High Frequency

VLF

Very Low Frequency

UHF

Ultra High Frequency

DYC

Diflection Yolk Coil

SHF

Super High Frequency

ACCB

Air Case Circuit Breaker

ACDB

Alternating Current Distribution Board

ADC

Analog To Digital Converter

AFC

Automated Frequency Control

AFC

Available Fault Current

AIC

Ampere Interrupting Capacity

ATS

Automatic Transfer Switch

GO

Gang Operated

UG

Under Ground

BLDC

Brushless DC

AH

Ampere Hour

PVC

Poly Vinyl Chloride

DB

Distribution Board

RCCB

Residual Current Circuit Breaker

RCBO

Residual Current Circuit Breaker with
Overload Protection

RCD

Residual Current Device

RPR

Reverse Power Relay

ELCB

Earth Leakage Circuit Breaker

FLA

Full Load Amperes

GND

Ground

DPR

Dividing Pulse Relay

DCDB

Direct Current Distribution Board

P

Pole

DP

Double Pole

EST

Extra Super Tension

GFI

Ground Fault Interrupter

GFCI

Ground Fault Circuit Interrupter

IGBT

Insulated-gate Bipolar Transistor

LDR

Light Dependent Resistor

LVDT

Linear Variable Differential Transformer

NL

Neutral Link

NCT

Neutral Current Transformer

PT

Potential Transformer

MCB

Miniature Circuit Breaker

TMCB

Thermal Magnetic Circuit Breaker

MCCB

Molded Case Circuit Breaker

MS

Main Switch

SB

Switch Board

SW

Switch

SWG

Standard Wire Gauge