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JINDAL ELECTRICAL’SJINDAL ELECTRICAL’SLUDHIANALUDHIANA
PRESENTED BY:-
TANPREET KAUR(314054408)
AND
JASPREET KAUR(314054421)
ELECTRICAL
VISUAL AID ON 6 MONTH INDUSTRIAL TRAINING AT
ABOUT THE ORGANIZATION
Jindal Electricals Was Established In 1967 By Mr. B.B JindalJindal Is One Of The Main Electrical Industries Of IndiaThey Are Pioneer In The Field Of Rectifiers, Special Purpose Transformers & Industrial Servo StabilizerToday They Have Three Associates Units.They Are:-
JINDAL ELECTRICALS 390-A, INDUSTRIAL AREA-A LUDHIANA
JINDAL ELECTRIC & MACHINERY CORP. C-57 FOCAL PT. LUDHIANA
JINDAL RECTIFIERS, FARIDABAD
JINDAL’S INDIAN CLIENTS
Hindustan Lever Ltd. L & T Ltd. Birla’s Tata’s Ashok Leyland Ltd. Escort India Ltd. Lipton India Ltd. Hero Cycles Ltd. Atlas Cycles Ltd. Avon Cycles Ltd. Pfizer India Ltd. Ranbaxy India Ltd.And Many More . . . . . . . . . . . . .
JINDAL’S FOREIGN CLIENTS
United Fibers in BANGLADESH.
M/s Medical Technologies Ltd. In UZBEKISTAN.
Shivam Plastics Ltd. in NEPAL.
M/s Patplast Nog Ltd. in NIGERIA
PRODUCTS
RECTIFIER
SPECIAL PURPOSE TRANSFORMER
AUTOMATIC VOLTAGE CONTROLLER
ISOLATION TRANSFORMER
GENERAL TRENDS OF VOLTAGE
VOLTAGE TIMING
340 – 460 V 09:00 AM – 12:00 AM
400 – 440 V 12:00 AM – 02:00 PM
340 – 400 V 02:00 PM – 06:00 PM
400 – 430 V 06:00 PM – 10:00 PM
400 – 470 V 10:00 PM – 05:00 AM
400 – 450 V 05:00 AM – 09:00 AM
VOLTAGE VARIATION
VOLTAGE FLUCTUATION IS A COMMON PHENOMENON ALL OVER THE COUNTRY. GENERALLY VOLTAGE IS LOW DURING THE DAYTIME BUT HIGH DURING NIGHT HOURS. ALSO VOLTAGE FLUCTUATION IS A SEASONAL PROBLEM.
EFFECTS OF VOLTAGE VARIATIONS
Higher current produces higher losses in electrical motors which causes premature failure of winding.
These higher losses of electric motors also increase the losses of cables, switches, transformers and other associated equipments.
INCREASESENERGY
CONSUMPTION
NON UNIFORM QUALITY OF
THE ENDPRODUCT
REDUCES POWER FACTOR
EFFECTS OF VOLTAGE
VARIATION
MAIN COMPONENTS OF AVC
MAIN TRANSFORMERLINEAR REGULATORAUTO TRANSFORMERCARBON ROLLER ASSEMBLYSYNCHRONOUS MOTORBUSBARCONTROL PANELTRANSFORMER OILTANK
THREE MAIN PARTS OF SERVO
LINEAR PLUS/MINUS TYPE VERTICAL ROLLING CONTACT TYPE REGULATOR
DOUBLE WOUND BUCK/BOOST TRANSFORMER
CONTROL PANEL
VARIOUS SECTIONS
WINDING SECTION
ELECTRIC SECTION
CORE SECTION
FITTING SECTION
CORE
IT PROVIDES AN EASY PATH TO THE FLOW OF FLUX. THE CORE IS MADE UP OF CRGO (cold rolled grain oriented) STEEL IN ORDER TO REDUCE THE CORE LOSSES. IT HAS VERY HIGH PERMIABILITY.
DIFFERENT TYPES OF CORES ARE
BLACK GREY CRGO YELLOW WHITE
TYPES OF CUTTING OF CORE
NON – MITRED
HALF – MITRED
FULLY – MITRED
V – NOTCH MITRED
TYPES OF CORE ASSEMBLIES
SHELL TYPE
CORE TYPE
LIST OF COMPONENTS USED IN CORE SECTION
DIFFERENT TYPE OF YOKE ACCORDING TO SIZE OF CORE
CRGO LOW SPEED SILICON STEEL
FOOT PRESS CUTTING MACHINE
DRILL MACHINE
TYPES OF WINDINGS MADE IN WINDING SECTION
IN WINDING SECTION MAINLY TWO TYPE OF WINDINGS ARE DONE
THESE ARE:-
SERIES TRANSFORMER
REGULATOR
WINDING OF REGULATOR
INNER VIEW OF AN AVC
REGULATOR
SYNCHRONOUS MOTOR
SERIES TRANSFORMER
CLOSE VIEW OF SERIES TRANSFORMER
LIST OF COMPONENTSUSED IN FITTING SECTION
CARBON ROLLERS
DRILL MACHINE
CHAIN
TROLLEY
LIST OF COMPONENTS USED IN ELECTRIC SECTION
SYNCHRONOUS MOTOR
RC SET
MICRO SWITCH
WIRES
WORKING OF AN AVC
WORKING PRINCIPLE
WORKING
Flux is in the same direction so the voltage
gets added
Primary wdg is short circuited
so no current flows
in the primary..
Flux in the opposite direction so o/p is the diff of the
I/p & the emf induced..
CONTROL PANEL
FOR 3 - PHASE
BALANCED TYPE CIRCUIT
CONTROL PANEL
It comprises of control unit with sensing circuit.
This unit acts as a control center for the whole regulator, the electronic circuit senses the voltage variation and according to the variation it controls the movement of rollers.
Control panel is used in automatic voltage controller for automatically and manually controlling the servo.
LIST OF COMPONENTSUSED IN CONTROL PANEL
AUTO TRANSFORMERCONTROL TRANSFORMERIC CARDCUT OFF CARDVOLTMETERAMMETERVOLTMETER SELECTOR SWITCHAMMETER SELECTOR SWITCHDPDT SWITCHINDICATORSPOTENTIOMETER
FUNCTIONS OF VARIOUS COMPONENTS OF CONTROL PANEL
ITEM FUNCTIONS
IC CARD AUTOMATIC CONTROL OF MOTOR
CUT OF CARD HIGH VOLTAGE CUT
CONTROL T/F(9-0-9V) FOR VOLTAGE OUTPUT OF 9/18 ACC . TO REQUIREMENT
AUTO T/F (400-220V) TO STEP DOWN THE VOLTAGE
10 AND 12 PIN CONNECTOR
TO FIT CUT OFF CARD AND IC CARD
AMMETER TO CHECK LOAD CURRENT
VOLTMETER TO CHECK I/P AND O/P VOLTAGE
INDICATORS TO SHOW PHASE SUPPLY R,Y,B
POTENTIOMETER VARY THE RESISTANCE
FUNCTIONS OF VARIOUS PINS OF AN IC CARD
PIN NUMBER FUNCTION
1 & 2 9 VOLTS SUPPLY
3 DIRECTLY PHASE IS GIVEN
5 & 6 18 VOLTS SUPPLY
7 or 8 POTENTIOMETER
9 or 10 LOWER IS GIVEN
11 or 12 RAISE IS GIVEN
FUNCTIONS OF VARIOUS PINS OF AN CUT OFF CARD
PIN NUMBER FUNCTION
1 & 3 18 VOLTS SUPPLY
8 RAISE THE MOTOR
9 RAISE TERMINAL TO SWITCH
INNER VIEW OF CONTROL PANEL
TWO WORKING MODES OF THE PANEL ARE
AUTO MODE
MANUAL MODE
CONNECTIONS OF SYNCHRONOUS MOTOR
SPECIFICATIONS OF SYNCHRONOUS MOTOR
TYPE 1-Φ SYNCHRONOUS (CAPACITOR START)
VOLTAGE 220V (AC)
CURRENT 250 mA
TORQUE 10/20 Kg-cm
HORSE POWER 0.008 HP
FREQUENCY 50 Hz
SPEED 60 R.P.M.
TESTING OF AVC
NO-LOAD TEST
MEGGER TEST
RANGE TEST
50% LOAD TEST
HEAT RUN TEST
PANEL TEST
NO LOAD TESTING
This test is done to check the range of the stabilizer for which it is built, variable input is given to terminals of an AVC and the output is kept open. Firstly minimum voltage of the range is given and the output is checked. Then the maximum voltage of the range is applied and again the output is checked.
MEGGER TESTING
IN THIS TESTING AN INSTRUMENT CALLED MEGGER IS USED. THIS TEST IS DONE TO CHECK THE INSULATION LEVEL OF THE STABILIZER AND TO CHECK IF THERE IS NO SHORT CIRCUIT IN RTHE SYSTEM.READINGS ARE TAKEN AT THREE DIFFERENT PARTS:-
LINE TO EARTH
LINE TO CORE
EARTH TO CORE
RANGE TEST
THIS TEST IS DONE IN ORDER TO TEST THE RANGE OF SERVO CONTROLLED VOLTAGE REGULATOR.IT CAN BE CHECKED BY UTILIZING THE EQUIPMENT TO ITS MAXIMUM AND MINIMUM VOLTAGE AND CURRENT RANGE.
50 % LOAD TESTING
IN THIS TEST 50 % OF FULL LOAD IS PUT ON THE STABILIZER AND OUTPUT IS SHORT CIRCUITED. THIS TEST IS DONE TO CHECK THE HEATING EFFECT OF EQUIPMENT USED IN STABILIZER.THIS TEST IS ESSENTIAL BEFORE WE PUT IT INTO OIL TANK. IN AIR WE CANNOT PUT FULL LOAD ON THE STABILIZER DUE TO HEATING.
HEAT RUN TEST
THIS TEST IS DONE TO CHECK THE RISE IN TEMPERATURE OF THE STABILIZER WHEN IT IS WORKING ON FULL LOAD.
RISE IN TEMP = SERVO INTERNAL TEMP - AMBIENT TEMP
PANEL TESTING
THIS TEST IS DONE TO CHECK THE EFFICIENT WORKING OF THE PANEL. THIS IS DONE IN TWO MODES:-
AUTO MODE
MANUAL MODE
FUNCTIONS OF INSULATION OIL
IT PROTECTS ADDITIONAL INSULATION
PROTECTS PAPER FROM DIRT AND MOISTURE
CARRY AWAY THE HEAT GENERATED IN THE CORE AND COILS
PROPERTIES OF INSULATION OIL
HIGH DIELECTRIC STRENGTH
FREE FROM INORGANIC ACID ALKALI AND CORROSIVE SULPHUR
LOW VISCOSITY
FREE FROM SLUGGING
METHODS OF COOLING
OIL IMMERSED NATURAL COOLED TRANSFORMER
OIL IMMERSED FORCED AIR COOLED TRANSFORMER
OIL IMMERSED WATER COOLED TRANSFORMER
OIL IMMERSED FORCED WATER COOLED TRANSFORMER
AIR BLAST TRANSFORMER
ADVANTAGES OF LT OVER HT
In case of malfunctioning of electronic system any stabilizer could go on increasing the output voltage, if this problem happens in HT stabilizer it can damage the distribution t/f. These t/f are more prone to failure with over voltage even for shorter period as compared to over load for longer time. In case same thing happening on LT stabilizer it will not damage the distribution t/f.
Thank You
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