Code:EET1956

Slipring motor belongs to the family of 3Phase Induction motors, with the difference that the rotor is not same as Induction motors instead has windings with slipring & slipring holder on the rotor. These motors find major application in Crane applications & had the advantage over induction motors that by inserting resistance in the rotor winding the speed can be varied, though this advantage is not valid today as Induction motors have go VVVF drives for speed control. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Components, Starting methods, Speed-Torque behavior, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Starting methods, Speed control, Speed-Torque, Effect of resistance in rotor, Effects of Single phasing, Effect of voltage imbalance operation, Blocked rotor test.

Technical Specs :

• Power ratings available : 350W / 750W / 1KW /2 KW / 3KW/ 5KW
• Voltage Input: 440V AC 50hz
• RPM: 1440 / 2880 RPM
• Single / Double shaft extension, TEFC, IP44, IC01, B3, Class-B, S1, Casting body

List Of Experiments :

• Starting by DOL Starter
• Starting by reduced voltage starter.
• Speed variation by Rotor resistance
• Speed Control by VVVF method
• Load test & No load test of machine
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Speed reversal
• Efficiency Analysis
• Blocked rotor test
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Basic Overhauling Know how

Code:EET1961

Synchronous motor belongs to the family of 3Phase Induction motors, with the difference that the rotor is not same as Induction motors instead has windings with slipring & slipring holder on the rotor. These motors have damper winding to make it start like Induction motors. These motors have 2 Types of Voltage Excitation, 3Phase for starting the motor & additional 110V DC across the rotor to lock the speed of the motor- Once it is excited with DC Voltage the rpm of the motor gets locked, in the sense that if the motor is running on No load or Full load the rpm remains the same. The application of such motors is those machines which run only on fixed speed without any rpm change, sugar mills & textile color mixing. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Components, Starting methods, DC Speed locking, Speed-Torque behavior, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Starting methods, Speed control, Speed-Torque, Speed locking, Effect of rotor excitation, Effect of voltage imbalance operation, Blocked rotor test.

Technical Specs :

• Power ratings available : 350W / 750W / 1KW /2 KW / 3KW/ 5KW
• Voltage Input: 440V AC 50hz & Additionally 110V DC for Rotor
• RPM: 1440 / 2880 RPM
• Single / Double shaft extension, SPDP, IP23, IC01, B3, Class-B, S1,Solid yoke

List Of Experiments :

• Starting by DOL Starter
• Starting by reduced voltage starter.
• Effect of High voltage induction at time of starting
• DC Speed locking
• Speed Control by VVVF method
• Load test & No load test of machine
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Speed reversal
• Efficiency Analysis
• Blocked rotor test
• Motor Operation
• Generator Operation
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Basic Overhauling Know how

Code:EET1966

With the availability of 3Phase power becoming common, the use of 3Phase AC Squirrel cage motor became very common & today it holds 90% of the total market share. The simplicity in operation with the 3phase voltages & immediate torque made it a very common motor. Dahlander motor is just an extension with the flexibility that from 1 motor you can get 2 different fixed rpm, this is basically by changing the coil connections inside the motor. This Model is the Industrial /Educational model suitable for demonstrating to students the complete know of the Basics, Components, Starting methods, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Starting methods, Speed control, Speed-Torque, Effect of Phase angle, Study of Cogging/Crawling, Effects of Single phasing, Effect of voltage imbalance operation, Blocked rotor test.

Technical Specs :

• Power ratings available : 350W / 750W / 1KW /2 KW / 3KW/ 5KW
• Voltage Input: 440V AC 50hz
• RPM: 2pole & 4pole, (1400/2880), other options are (6pole/4pole)
• Single / Double shaft extension, TEFC, IP44, IC01, B3, Class-B, S1, Casting body

List Of Experiments :

• Starting by DOL Starter
• Starting by Star-Delta Starter
• Starting by reduced voltage starter.
• Speed Control by VVVF method
• Load test & No load test of machine
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Speed reversal
• Efficiency Analysis
• Blocked rotor test
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Basic Overhauling Know how

Code:EET1971

With the availability of 3Phase power becoming common, the use of 3Phase AC Squirrel cage motor became very common & demand increased for motors with single phase power, as the current in single phase is a concern, hence motors upto 3Hp have been made In Single phase power with the same Induction design principle. These motors have a capacitor in its running winding this means the capacitor is always connected and active while the motor is running.This Model is the Industrial /Educational model suitable for demonstrating to students the complete know of the Basics, Components, Starting methods, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Starting methods, Speed-Torque, Effect of Phase angle, Study of Cogging/Crawling, Effect of reduced voltage, Blocked rotor test.

Technical Specs :

• Power ratings available : 350W / 750W / 1KW / 1.5KW
• Voltage Input: 230V AC 50hz
• RPM: 1440 / 2880 RPM
• Single/Double shaft extension, TEFC, IP44, IC01, B3, Class-B, S1, Casting/Sheet metal body

List Of Experiments :

• Starting by DOL Starter
• Starting by reduced voltage starter.
• Load test & No load test of machine
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Speed reversal
• Efficiency Analysis
• Blocked rotor test
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Basic Overhauling Know how

Code:EET1976

These Dynamometers are suitable for testing of Rotating machines AC or DC, basically these are also used as indirect method of loading of any machine. The construction features are basically a DC Shunt Generator constructed in such a way that it is able to indicate the torque produced at the rated rpm & current for the machine coupled to it. The prime mover becomes the motor under test & the dynamometer works as generator & its gets loaded by dissipating voltage generated in resistive load bank. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Components, Mechanicals, Loading methods, Torque evaluation, Loading scheme, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Coupling the motor to be tested, Starting methods, Speed-Torque, Excitation control of Dynamometer, Power dissipation of Generator, Torque measurement.

Technical Specs :

• Power ratings available : 1KW / 2KW/ 5KW/ 10KW
• Voltage Input: 230V DC
• RPM: 1440 / 2880 RPM
• Single / Double shaft extension, SPDP, IP23, IC01, B3, Class-B, S1, Solid yoke

List Of Experiments :

• Load testing of AC Motor
• Load testing of DC Motor
• Torque calculation at various rpm
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Speed reversal
• Efficiency Analysis
• Blocked rotor test
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Basic Overhauling Know how

Code:EET1981

These Dynamometers are suitable for testing of Rotating machines AC or DC, basically these are also used as indirect method of loading of any machine. The construction features are basically an Eddy Current Dynamometer is constructed in such a way that it is able to indicate the torque produced at the rated rpm & current for the machine coupled to it.The prime mover becomes the motor under test & the dynamometer works as generator & its gets loaded by Eddy current clutch provided in the Dynamo with the help of an exciter unit. This Model is the Industrial /Educational model suitable for demonstrating to students the complete know of the Basics,Components, Mechanicals, Loading methods, Torque evaluation, Loading scheme, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Coupling the motor to be tested, Starting methods, Speed-Torque, Excitation control of Dynamometer, Torque measurement. (Providing Load cells is an option)

Technical Specs :

• Power ratings available : 1KW / 2KW/ 5KW/ 10KW
• Voltage Input: 230V AC to Exciter unit
• Rpm of Machine 1500
• Single shaft extension, SPDP, IP23, IC01, B3, Class-B, S1, Solid yoke

List Of Experiments :

• Load testing of D
• Load testing of AC Motor
• C Motor
• Torque calculation at various rpm
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Speed reversal
• Efficiency Analysis
• Blocked rotor test
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Basic Overhauling Know how

Code:EET1986

VVVF Drive Modules are used for Speed Control of AC Induction motors/ Slipring motors with the concept of keeping V/F ratio constant. The Drive modules additionally provide power saving in turn they reduce the current drawn by Induction motors. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Speed control, Study of all parameters & variation of frequency upt 500Hz & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study/monitor of features on the display provided on the panel.

Technical Specs :

• Power ratings available : 1KW / 2KW/ 5KW/ 10KW
• Voltage Input: 440V AC 3Phase 50Hz
• Output : 0-440V with v/f constant
• Output frequency can be varied from 0 to 500Hz
• Module can be fitted in Control Panel on request

List Of Experiments :

• No load speed control of AC Induction motor
• ON load speed control of AC Induction motor
• Speed control of Slipring Induction motor
• Torque boost function provided.
• Speed reversal
• Efficiency Analysis
• Basic Overhauling Know how

Code:EET1991

These motors belong to the Single phase motor family, but these do not have capacitors to provide the initial turning effect, and hence have a very low starting torque. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Starting method, Winding study, Study of Speed-Torque, Study of Efficiency & Maintenance of these motors packaged in small rating.Students can make connections of their own with the help of the terminations provided.

Technical Specs :

• Power ratings available : 1KW / 2KW
• Voltage Input: 230V AC 1Phase 50Hz
• 1500 rpm, TEFC, B3, IP44, IC01, Class-B, S1, Single /Double shaft extension

List Of Experiments :

• Starting by DOL Starter
• Starting by reduced voltage starter.
• Load test & No load test of machine
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Efficiency Analysis
• Blocked rotor test
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Basic Overhauling Know how

Code:EET1996

Transformers are Basically Power conversion Devices, converting One voltage level to another starting from the Power generation stage till the Power utilization level.Single Phase transformer as the name suggests has Primary 230V AC & Secondary has tappings at 100%, 60%, 33% etc for various experiments. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Study and Voltage conversion at various levels, Study of Efficiency & Maintenance of these Transformers packaged in small rating.Students can make connections of their own with the help of the terminations provided.

Technical Specs :

• Power ratings available : 1KVA / 2KVA / 5 KVA
• Voltage Primary : 230V AC
• Voltage Secondary : 115V AC with tappings
• Enclosed in cabinet with terminations on Bakelite sheet with Banana terminals

List Of Experiments :

• Study of No load
• Study of Full load
• Efficiency evaluation
• Study of losses in transformer
• Basic Overhauling Know how

Code:EET2001

Transformers are Basically Power conversion Devices, converting One voltage level to another starting from the Power generation stage till the Power utilization level. Three Phase transformers as the name suggests has Primary 440V AC & Secondary has 230v AC 3Phase, Various connects are possible Star-Star, Delta-Delta with the connections provided for various experiments. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Study and Voltage conversion at various levels, Study of Efficiency & Maintenance of these Transformers packaged in small rating.Students can make connections of their own with the help of the terminations provided.

Technical Specs :

• Power ratings available : 1KVA / 2KVA / 5 KVA / 10KVA
• Voltage Primary : 440V AC
• Voltage Secondary : 230V AC
• Enclosed in cabinet with terminations

List Of Experiments :

• Study of No load
• Study of Full load
• Vector group connections
• Efficiency evaluation
• Study of losses in transformer
• Basic Overhauling Know how

Code:EET2006

Alternators are the Power Generation Devices, converting mechanical energy into Electrical Energy, The electricity provided by our utilities is from some Power Generation center where an Heavy Alternator is the device producing Electricity.Alternators have a design with wound rotor & wound stator, Alternators available are with slipring holders & also Brushless types. Students can make connections of their own with the help of the terminations provided for study of features viz Single phase generation, 3Phase Generation, Regulation with change in Load, Effect of change of speed on output voltage, Effects of Field voltage excitation change.

Technical Specs :

• Power ratings available : 350W / 750W / 1KW /2 KW / 3KW/ 5KW
• Voltage output: 220/440V AC
• Separate/Self Excitation : 220V DC
• RPM: 1500 / 3000 RPM
• Single / Double shaft extension, SPDP, IP23, IC01, B3, Class-B, S1, Solid yoke

List Of Experiments :

• Regulation of Alternator
• Effect of change of Speed on Output voltage
• Change of Voltage with Excitation control
• Voltage-Speed Analysis
• Efficiency Analysis
• Cold Resistance & Hot Resistance
• Alternator parameters
• Basic Overhauling Know how

Code:EET2011

Voltage utilized in industry are of either Resisitive, Inductive or Capacitive types these provide various types of power factor and the power system behaves accordingly. Resistive load banks are used to provide braking effect or for Heat dissipation. These have canthel wires wounded on porcelain tubes through which electricity is passed & current flows, normally for Resistive loads the Power factor is unity. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Loading provided in steps, Study of Efficiency & Maintenance of these Loads packaged in small rating. Students can make connections of their own with the help of the terminations provided.

Technical Specs :

• Power ratings available : 1KVA / 2KVA / 5 KVA / 10KVA
• Voltage Primary : 440V AC 3Phase/ 220V AC Single phase /220V DC
• Enclosed in cabinet with Wheel provided for loading/unloading, meters provided for each phase & terminations brought out on Banana terminals

List Of Experiments :

• Calculation of total resistance
• Change of resistance on load
• Efficiency evaluation
• Study of losses
• Basic Overhauling Know how

Code:EET2016

Voltage utilized in industry are of either Resisitive, Inductive or Capacitive types these provide various types of power factor and the power system behaves accordingly.Capacitive load banks are used to provide leading power factor in anypower system, normally all industrial units have lagging power factor & hence utilize capacitive load banks for getting leading power factor which compensates with the lagging power factor & makes the power system work near unity, this reduces the reactive power of the system improving the overall efficiency Capacitors are arranged in various combinations in each phase to provide balanced capacitance per phase. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Changeof capacitance in steps, Study of Efficiency & Maintenance of these Loads packaged in small rating.Students can make connections of their own with the help of the terminations provided.

Technical Specs :

• Power ratings available : 1KVA / 2KVA / 5 KVA / 10KVA
• Voltage Primary : 440V AC 3Phase/ 220V AC Single phase
• Enclosed in cabinet with Wheel provided for loading/unloading, meters provided for each phase & terminations brought out on Banana terminals

List Of Experiments :

• Calculation of total capacitance
• Effect of capacitance on power system
• Capacitive load provided for Alternators & Generators
• Efficiency evaluation
• Study of losses
• Basic Overhauling Know how

Code:EET2021

Voltage utilized in industry are of either Resisitive, Inductive or Capacitive types these provide various types of power factor and the power system behaves accordingly. Inductive load banks provide lagging power factor, these are made by a 3phase core & with the help of wheel the Inductance is increased or decreased, each phase. These are used to simulate industrial loads which are mostly lagging in nature. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Change of Inductance measured in henry, Study of Efficiency & Maintenance of these Loads packaged in small rating. Students can make connections of their own with the help of the terminations provided.

Technical Specs :

• Power ratings available : 1KVA / 2KVA / 5 KVA / 10KVA
• Voltage Primary : 440V AC 3Phase/ 220V AC Single phase
• Enclosed in cabinet with Wheel provided for loading/unloading, meters provided for each phase & terminations brought out on Banana terminals

List Of Experiments :

• Calculation of total Inductance in Henry
• Effect of Inductance on power system
• Inductive load provided for Alternators & Generators
• Efficiency evaluation
• Study of losses
• Basic Overhauling Know how

Code:EET2026

BLDC Motors as the name suggests are Brushless DC Motors, these motors have commutation with the help of Electronic Controllers. These motors have advantage of conventional motors of Zero maintenance, but have a complex electric circuit for the same. The efficiency of the motors is high & find applications in various medical appliances & railways carriage fans. This Model is the Industrial/Educational model suitable for demonstrating to students the complete know of the Basics, Components, Starting methods, Speed control, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Starting methods, Speed control, Speed-Torque, Effects of Armature voltage, Motor operation.

Technical Specs :

• Power ratings available : 60W
• Voltage Input: 24V DC
• RPM: 1500
• Single shaft extension, TEFC, IP44, IC01, B5, Class-F, S1, Solid yoke

List Of Experiments:

• Electronic commutation
• Speed Control & Over speed operations
• Load test & No load test of machine
• Speed-Torque Analysis
• Voltage-Speed Analysis
• Efficiency Analysis
• Cold Resistance & Hot Resistance
• Motor Operation parameters
• Generator Operation parameters
• Basic Overhauling Know how

Code:EET2031

We offer suitable solutions, no matter whether it concerns any AC/DC Tachogenerators or any special electrical machines. AC Tachogenerators give you AC Voltage output proportional to speed of its mover. They are generally used in applications for indication and display purposes. Frequency of 2 pole, 8 pole and 48 pole will produce 16.66 Hz, 66.66 Hz and 400 Hz respectively.

Standard Features:

• Compact and Light Weight High Linearity High Stability and Extreme Reliability in Hostile Industrial Environments

Specifications

• Current: Up to 50 mA
• Speeds: Up to 4000 rpm
• Voltages: 4V to 40 V / 1000 rpm
• Pole Design: 2, 8 and 48

Code:EET2036

Electrical Machine tutor/trainer is a CKD (Complete Knocked Down) kit for building various types of machines. It is useful forconstruction of 23 types of different Electrical Machines.

It is useful in giving student confidence & understanding constructional details & functional characteristics of electrical machines. The experience achieved by students, by themselvesassembling various components viz, Armature, Stator, Slipring,Caron, Rocker, Shaft, Pulley, Belt, Dial,..Assembling allcomponents, Fitting & tightening, Connecting with Panel & Starting the system with desired results--this gets confidence instudents & the feel of Industrial products.

Machine Trainer:

Specification of 1HP Electric Machine trainer is given ahead.Electric Machine Trainer is suitable for demonstrating theconstruction & working of DC Motor/DC Generator (Shunt,series & compound) with Interpole, Single phase capacitor runmotor, 3Phase Induction motor, (Sq. cage & Slipring), AC Alternator (Single/Three Phase), Single phase universal &repulsion motor, AC Synchronous Generator. Set will be providedwith metering panel, power supply panel, for 3Phase & Singlephase supply, DC Rectifier panel for DC Motor & DC/AC Singlephase variable supply source complete with common base frame& friction braket dynamometer. Rating of DC Prime mover willbe 1HP, 220V, 3000RPM, & other rating will be according toequirement.

DC MACHINES

• DC Shunt motor without Interpole
• DC Shunt motor with Interpole
• DC Series motor without Interpole
• DC Series motor with Interpole
• DC Compound motor without Interpole
• DC Compound motor with Interpole
• DC Shunt Generator without Interpole
• DC Shunt Generator with Interpole
• DC Series Generator without Interpole
• DC Series Generator with Interpole
• DC Compound Generator without Interpole
• DC Compound Generator with Interpole
• DC Seperately excited Generator without Interpole
• DC Seperately excited Generator with Interpole

AC MACHINES (Single Phase)

• Single Phase 4 Pole, Induction motor Capacitor Start/Run.
• Single Phase AC Series motor.
• Single Phase AC Generator Rotating Field
• Single Phase AC Generator Rotating Armature.
• Single Phase Universal motor.

AC MACHINES (Three Phase)

• AC 3 Phase Induction motor Squirrel cage type.
• AC 3 Phase Induction motor Slipring type.
• AC 3 Phase Generator Rotating field type.
• AC 3 Phase Generator Rotating Armature type.
• AC 3 Phase Synchronous Generator Rotating field type.

This is the Basic model, Advanced models are available on request with a wide range of Advanced Machines & Drives as per your request.

Electrical Machine tutor/trainer is a CKD (Complete Knocked Down) kit for building various types of machines. It is useful for construction of 23 types of different Electrical Machines.

Code:EET2041

DC Motors cannot be started directly with the applied voltage as the back emf is very low hence very heavy current flows in the motor, to reduce the inflow of current resistance is inserted in series with the motor armature & once the motor starts rotating the resistances are gradually cut off.

This concept of starting of DC Motors has 3 Basic types of DC Starters

• - 2Point DC Starter for DC Series motors
• - 3Point DC Starter for DC Shunt motor
• - 4Poitn DC Starter for DC Compound motor

Technical Specs :

• Power ratings available : 350W / 750W / 1KW /2 KW / 3KW/ 5KW
• Voltage Input: 220V DC

List of Experiments:

• DC Series motor starting with 2Point DC Starter
• DC Shunt motor starting with 3Point DC Starter
• DC Compound motor starting with 4Point DC Starter
• Educational type with components visible
• Basic Overhauling Know how

Code:EET2046

PERFORMANCE SPECIFICATION FOR STATIC CONVVERTER

• SCOPE :- Our specification covers design, manufacturing, inspection, testing, supply of the DRIVE.
• INPUT SYSTEM :-
  Normal Voltage : 415V +/- 10%
  No of phases : Three phase, four wire
  Frequency : 50Hz +/- 2%
  Fault level : 20KA RMS at 415 V.
  Neutral earth : Solidly earthed.
• TECHNICAL PARTICULARS :-
  - Output Voltage.
  A. Armature : 440V DC Max.
  B. Field : 220V DC
  C. DC Motor Blower : 415V +/-10%, 50Hz +/-2%, 3Ph.
  - Output Current.
  A. Armature :
  B. Field :
  - Speed Control.
  - Accuracy of speed control. +/-2% under Arm. Voltage feedback.
  - Soft start. Acceleration and deceleration control from 5sec to 30sec adjustable.
  - Type of control : Tacho/Arm. Voltage feedback.
  - Direction of rotation.:
  - Braking.
  - Type of cooling : Forced air cooling
• CONVERTER MODULES.
  - Input module
  - Thyristor module
  - Regulation module
  - Output module
  - Excitation module
  - Indicating and operating module
  - Protection module
  
  A. Input module
  The incoming 415V 3PH four wire supply will be brought into this module. It consists of -
  - Tripple pole and neutral incoming AC heavy duty isolator switch.
  - Three nos. HRC fuse link for mains.
  - Main contactor
  - Line surge suppressor consisting of capacitors, resistors & MOVs.
  
  B. Thyristor module
  It will consist of three phase, full wave, fully controlled thyristor bridge assembly comprising of -
  - Six nos. derated thyristors each mounted on Aluminium heat sinks
  - RC Snubber circuit for power semi-conductors.
  - MOVs to protect thyristors against spikes.
  - Pulse transformers to isolate the control circuit from power circuit.
  - Forced cooling arrangement.
  
  C. Regulation module
  It consists of modular glass-epoxy based printed circuit boards of height 4U with plug-in type gold plated connectors for easy replacement and servicing.
  These are green masked, legend printed PCBs housed in a card frame and interconnected by a mother PC Board.
  The different blocks are as under.
  - Power supply and regulator.
  - Ramp generator with adjustable accn. Decn. Circuit.
  - Voltage and current control amplifier which controls the output voltage with adjustable voltage and current limiting.
  - Pulse amplifier feeding the pulse transformer primary and the gate trigger cirrcuits.
  - Tripping circuit for single phasing, phase sequence, under voltage, field failure and Electronic overload.
  
  The settings petentiometers (presets), coloured test points and LED indicators are located at the front of the cards

Code:EET2051

Electrical Machine tutor/trainer is a CKD (Complete Knocked Down) kit for building various types of machines. It is useful for construction of 23 types of different Electrical Machines. It is useful in giving student confidence & understanding constructional details & functional characteristics of electrical machines. The experience achieved by students, by themselves assembling various components viz, Armature, Stator, Slipring, Caron, Rocker, Shaft, Pulley, Belt, Dial,..Assembling all components, Fitting & tightening, Connecting with Panel & Starting the system with desired results--this gets confidence in students & the feel of Industrial products.

Machine Trainer:

Specification of 1HP Electric Machine trainer is given ahead. Electric Machine Trainer is suitable for demonstrating the construction & working of DC Motor/DC Generator (Shunt, series & compound) with Interpole, Single phase capacitor run motor, 3Phase Induction motor, (Sq. cage & Slipring), AC Alternator (Single/Three Phase), Single phase universal & repulsion motor, AC Synchronous Generator. Set will be provided with metering panel, power supply panel, for 3Phase & Single phase supply, DC Rectifier panel for DC Motor & DC/AC Single phase variable supply source complete with common base frame & friction braket dynamometer. Rating of DC Prime mover will be 1HP, 220V, 3000RPM, & other rating will be according to requirement.Assemblies:

DC MACHINES

• DC Shunt motor without Interpole
• DC Shunt motor with Interpole
• DC Series motor without Interpole
• DC Series motor with Interpole
• DC Compound motor without Interpole
• DC Compound motor with Interpole
• DC Shunt Generator without Interpole
• DC Shunt Generator with Interpole
• DC Series Generator without Interpole
• DC Series Generator with Interpole
• DC Compound Generator without Interpole
• DC Compound Generator with Interpole
• DC Seperately excited Generator without Interpole
• DC Seperately excited Generator with Interpole

AC MACHINES (Single Phase)

• Single Phase 4 Pole, Induction motor Capacitor Start/Run.
• Single Phase AC Series motor.
• Single Phase AC Generator Rotating Field
• Single Phase AC Generator Rotating Armature.
• Single Phase Universal motor.

AC MACHINES (Three Phase)

• AC 3 Phase Induction motor Squirrel cage type.
• AC 3 Phase Induction motor Slipring type.
• AC 3 Phase Generator Rotating field type.
• AC 3 Phase Generator Rotating Armature type.
• AC 3 Phase Synchronous Generator Rotating field type.

Code:EET2056

PERFORMANCE SPECIFICATION FOR STATIC CONVVERTER

• SCOPE :- Our specification covers design, manufacturing, inspection, testing, supply of the DRIVE.
• INPUT SYSTEM :-
  Normal Voltage : 415V +/- 10%
  No of phases : Three phase, four wire
  Frequency : 50Hz +/- 2%
  Fault level : 20KA RMS at 415 V.
  Neutral earth : Solidly earthed.
• TECHNICAL PARTICULARS :-
  - Output Voltage.
  A. Armature : 440V DC Max.
  B. Field : 220V DC
  C. DC Motor Blower : 415V +/-10%, 50Hz +/-2%, 3Ph.
  - Output Current.
  A. Armature :
  B. Field :
  - Speed Control.
  - Accuracy of speed control. +/-2% under Arm. Voltage feedback.
  - Soft start. Acceleration and deceleration control from 5sec to 30sec adjustable.
  - Type of control : Tacho/Arm. Voltage feedback.
  - Direction of rotation.:
  - Braking.
  - Type of cooling : Forced air cooling
• CONVERTER MODULES.
  - Input module
  - Thyristor module
  - Regulation module
  - Output module
  - Excitation module
  - Indicating and operating module
  - Protection module
  
  A. Input module
  The incoming 415V 3PH four wire supply will be brought into this module. It consists of -
  - Tripple pole and neutral incoming AC heavy duty isolator switch.
  - Three nos. HRC fuse link for mains.
  - Main contactor
  - Line surge suppressor consisting of capacitors, resistors & MOVs.
  
  B. Thyristor module
  It will consist of three phase, full wave, fully controlled thyristor bridge assembly comprising of -
  - Six nos. derated thyristors each mounted on Aluminium heat sinks
  - RC Snubber circuit for power semi-conductors.
  - MOVs to protect thyristors against spikes.
  - Pulse transformers to isolate the control circuit from power circuit.
  - Forced cooling arrangement.
  
  C. Regulation module
  It consists of modular glass-epoxy based printed circuit boards of height 4U with plug-in type gold plated connectors for easy replacement and servicing.
  These are green masked, legend printed PCBs housed in a card frame and interconnected by a mother PC Board.
  The different blocks are as under.
  - Power supply and regulator.
  - Ramp generator with adjustable accn. Decn. Circuit.
  - Voltage and current control amplifier which controls the output voltage with adjustable voltage and current limiting.
  - Pulse amplifier feeding the pulse transformer primary and the gate trigger cirrcuits.
  - Tripping circuit for single phasing, phase sequence, under voltage, field failure and Electronic overload.
  
  The settings petentiometers (presets), coloured test points and LED indicators are located at the front of the cards

Code:EET2061

PERFORMANCE SPECIFICATION FOR STATIC CONVVERTER

• SCOPE :- Our specification covers design, manufacturing, inspection, testing, supply of the DRIVE.
• INPUT SYSTEM :-
  Normal Voltage : 415V +/- 10%
  No of phases : Three phase, four wire
  Frequency : 50Hz +/- 2%
  Fault level : 20KA RMS at 415 V.
  Neutral earth : Solidly earthed.
• TECHNICAL PARTICULARS :-
  - Output Voltage.
  A. Armature : 440V DC Max.
  B. Field : 220V DC
  C. DC Motor Blower : 415V +/-10%, 50Hz +/-2%, 3Ph.
  - Output Current.
  A. Armature :
  B. Field :
  - Speed Control.
  - Accuracy of speed control. +/-2% under Arm. Voltage feedback.
  - Soft start. Acceleration and deceleration control from 5sec to 30sec adjustable.
  - Type of control : Tacho/Arm. Voltage feedback.
  - Direction of rotation.:
  - Braking.
  - Type of cooling : Forced air cooling
• CONVERTER MODULES.
  - Input module
  - Thyristor module
  - Regulation module
  - Output module
  - Excitation module
  - Indicating and operating module
  - Protection module
  
  A. Input module
  The incoming 415V 3PH four wire supply will be brought into this module. It consists of -
  - Tripple pole and neutral incoming AC heavy duty isolator switch.
  - Three nos. HRC fuse link for mains.
  - Main contactor
  - Line surge suppressor consisting of capacitors, resistors & MOVs.
  
  B. Thyristor module
  It will consist of three phase, full wave, fully controlled thyristor bridge assembly comprising of -
  - Six nos. derated thyristors each mounted on Aluminium heat sinks
  - RC Snubber circuit for power semi-conductors.
  - MOVs to protect thyristors against spikes.
  - Pulse transformers to isolate the control circuit from power circuit.
  - Forced cooling arrangement.
  
  C. Regulation module
  It consists of modular glass-epoxy based printed circuit boards of height 4U with plug-in type gold plated connectors for easy replacement and servicing.
  These are green masked, legend printed PCBs housed in a card frame and interconnected by a mother PC Board.
  The different blocks are as under.
  - Power supply and regulator.
  - Ramp generator with adjustable accn. Decn. Circuit.
  - Voltage and current control amplifier which controls the output voltage with adjustable voltage and current limiting.
  - Pulse amplifier feeding the pulse transformer primary and the gate trigger cirrcuits.
  - Tripping circuit for single phasing, phase sequence, under voltage, field failure and Electronic overload.
  
  The settings petentiometers (presets), coloured test points and LED indicators are located at the front of the cards

Code:EET2066

The Electrical Machine Trainer system is provided with specially designed integrated machines of nominal 300 W / 0.5 HP rating. Control Panels containing power supplies, drives, loading arrangements, electronic and digital instruments are provided along with Machines. The training system is suitable to study a wide range of electrical machine syllabi starting from the basic principle and operation to the detailed study of characteristics of different types of AC and DC Machines.

This Machine Trainer consists of the following Machine and Control Panel Sets:-

Machine Set - 1

0.5 HP / 180 V / 1500 RPM / DC Integrated Machine, Coupled with 350 VA / 3 Phase / 415 V / 1500 RPM / Star connected / Rotor Wound / Stator Excited / 220 V DC Separate excitation / Manually regulated / 3 Phase Synchronous Machine with Damper winding. Provided with base and couplings. DC Machine will be Trunnion Mounted Dynamometer type with Linear scales (2 nos.) for torque measurement. DC Machine can run as DC Shunt, Series & Compound Motor as well as Generator. 3 Phase Synchronous machine can run as 3 Phase Synchronous Alternator & 3 Phase Auto Synchronous Motor

Machine Set - 2

0.5 HP / 415 V Stator / 200 V Star connected Rotor / 1440 RPM / 3 Phase / Slip Ring Induction Motor complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

Machine Set - 3

0.5 HP / 415 V / 1440 2880 RPM / 3 Phase / SQ. Cage Induction Motor with Dhalandar Winding for 2 speed operation. Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

Machine Set - 4

0.5 HP / 230 V / 1 Phase / 1440 RPM / SQ. cage Induction Integrated Motor. Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement. This Motor can run as Capacitor Start Capacitor Run (CSCR), Capacitor Start Induction Run (CSIR) and Split Phase Single Phase Sq. Cage Induction Motor

Machine Set - 5

0.5 HP / 160 V DC 220 VAC / 1500 2000 RPM / Universal (AC Series) Motor. Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

Machine Set - 6

0.5 HP / 230 VAC / 1500 RPM / Repulsion Motor Complete with Mechanical Loading Arrangement having Aluminum Drum Mounted on Motor Shaft, Linear spring balances (2 nos.), Friction belt & necessary frame work for Torque Measurement

Control Panel (Common for all Machine sets)

Control Panel is made of 16 SWG SS Sheet metal with Poly Carbonate Facia displaying Mimic diagrams. The Control Panel will consist of the following components:-

• Digital DC Ammeters 3 Nos
• Digital AC Ammeter
• Digital DC Voltmeters 3 Nos
• Digital AC Voltmeter
• 3 Phase / 1E AC Combimeter
• Digital RPM Indicator with sensor
• Single Phase DC Thyristor Power Supply 3 Nos
• 1 Phase Resistive Load Bank
• 3 Phase Resistive Load Bank
• DOL cum Star Delta starter
• DC Starter
• Field Regulator
• Fix resistance as Field Diverter
• 3 Phase Variac (External) and all other required Indicators, switches, MCB & Educational Type terminals

Note : Individual Control panels for each machine set can be provided at an extra cost to facilitate multiple student batches to perform experiments simultaneously

Salient features

• Control Panel contains all safety and tripping measures
• Panel has Polycarbonate Facia with mimic diagrams of components with all terminals brought outside for easy and shock free connections
• The trainer unit covers a wide range of machine syllabus. More than 45 experiments can be conducted.
• Easy and safe wiring due to use of colour coded & Electrically insulated terminals (binding posts) on Top
• Dynamically balanced rotors to minimise vibration / noise
• Acrylic viewing window is provided to observe internal structure of machine and to make students familiar with parts of the machines like commutator, slip ring, brush holder, carbon brush, stator, rotor, centrifugal switch etc
• Digital indication of electrical parameters like Voltage, Current, RPM, etc. giving a broad introduction of measuring instruments
• Separates Machines with Common Control Panel of option for individual Control Panels which enables multiple batches of students to conduct experiments simultaneously
• Performance conforming to IS/IES Standards
• Complete Hard and Soft copy of Manual

List of Practicals that can be covered by Electrical Trainer Unit At a glance DC Integrated Machine

• Speed torque characteristic for self/separately excited Shunt Motor
• Speed torque characteristic for over/under/level excited compound Motor
• Speed torque characteristic for Series Motor
• Study of cumulative and differential compounded motor
• Swinburne's test on DC Machine
• Starting methods of DC Machine using 2P/3P/4P Starters
• Speed control of Shunt Motor using armature/field control
• Speed control of Compound Motor using armature/field control
• Speed control of Series Motor using armature control
• O.C.C on DC Generator
• V/I characteristic for separately/self excited DC shunt Generator
• V/I characteristic for over/under/level excited Compound Generator
• V/I characteristic for Series Generator
• Study of cumulative and differential compounded Generator
• Efficiency curve for DC integrated Machine
• Study of a Dynamometer

3 Phase AC Synchronous Machine

• Load characteristic of 3 phase Synchronous Motor
• V curve/inverse V curve for 3 phase synchronous machine
• Current Locus for Synchronous Motor
• Voltage regulation of Three Phase Alternator by EMF, MMF & Direct Loading (UPF)
• Load characteristic of 3 phase Alternator
• O.C.C/S.C.C. test for 3 phase Alternator
• Slip test for 3 Phase Synchronous machine
• Efficiency curve 3 Phase Alternator and synchronous Motor

Universal Motor

• Load test of Universal Motor with AC supply
• Load test of Universal Motor with DC supply
• Speed control of Universal Motor
• Efficiency curve for Universal Motor

1 Phase AC Integrated Machine

• Load characteristic of 1 Phase AC Motor as capacitor start-induction run
• Load characteristic of 1 Phase AC Motor as capacitor start-capacitor run
• Load characteristic of 1 Phase AC Motor as split phase
• Blocked rotor Test
• Efficiency curve for 1 phase AC Induction Motor

3 Phase AC Integrated Machine

• Load characteristic of 3 Phase Slip Ring Induction Motor
• Star/Delta starting of 3 Phase Slip Ring Induction Motor
• DOL starting of 3 Phase Slip Ring Induction Motor
• Load characteristic of 3 Phase self start Synchronous Induction Motor
• Blocked rotor test
• Efficiency curve for 3 phase Slip Ring Induction Motor

Repulsion Motor

• Load test of Repulsion Motor
• Speed control of Repulsion Motor. (with Brush Adjustment)
• Efficiency curve for Repulsion Motor

3 Phase Sq. Cage Induction Motor

• Load characteristic of 3 phase SQIM @ 2 Pole & 4 Pole
• DOL starting of 3 phase SQIM
• Blocked rotor test
• Efficiency curve for 3 phase SQIM
• To study Dhalandar Winding. (2 Pole 4 Pole connection)

MG Set

• 3 phase AC to DC converter & vice versa

TECHNICAL DATA SHEET
Common Specifications

• Frame : 90 /100 Watts : 300/375 RPM : 1500
• Insulation Class : B Enclosure : SPDP /IP22 Duty : S1 (Continuous)
• Cooling : IC01 Mounting : B3 ( Foot ) Hz. : 50 ( if AC )

DC Integrated Machine

• Field V : 180 Field A : 0.45
• Armature V/A For MotoR : 180 V / 2 A
• Shunt Generator : 170 V / 1.75 A
• Series Generator : 120 V / 2.5 A
• Compound Generator : 190 V / 1.6 A

3 Phase Synchronous Machine

• ROTOR : 415 V / 0.6 A / 3 Phase 4 WAC
• Star Connection
• Stator : 220 V / 0.5 A DC

Single Phase Ac Integrated Machine

• Volts : 230 Hz : 50
• AMPS : CSCR : 2.6 A CSIR : 4.7 A
• Split Phase : 4.7 A

Three Phase AC SQIM (2 Speed)

• With Dhalandar Winding
• Hz : 50 VOLTS : 415
• 0.5 HP AMPS : 1.0 RPM : 1500
• HPAMPS : 2.0 RPM : 3000

Repulsion Motor

• AC
• Volts 230
• AMPS 4.5

Three Phase AC Slipring Machine

• Hz : 50 CONN : Delta
• SYN. Induction
• SLIM Motor
• V (Stator) 415 VAC 415 VAC
• A (Stator) 1.4 A AC 0.8 A AC
• EX. V (Stator) 50 V DC 50 V DC
• EX. A (Stator) 2.0 A DC 2.0 A DC

Universal Motor

• AC DC
• Volts 230 150
• AMPS 4.5 3.5
• RPM 2000 1500