46967 Electrical Workstation offers an excellent approach to the teaching of Electrical Machines principles by introducing a unique modular designed control unit. It provides flexibility for the students to carry out experiments over AC and DC Machines using a large selection of Industry standard inbuilt components.

Electrical Machines is one of the most important area of study as it helps users to understand the operational characteristics and working of AC and DC Machines. 46967 enables user to put their theory knowledge into practice with ease. There is an additional facility to make wireless connection on workstation with computer and to monitor real time electrical parameters using computer interfacing software. Users can also observe a real time graph between any of the AC and DC electrical parameters on computer.

Workstation comprises of separate AC and DC measuring sections equipped with all the necessary instruments such as digital meters, facility to connect AC and DC Supplies along with protection devices such as Fuses, MCB’s, Supply Indicators, etc. There are multiple buses provided on the Workstation to make external connections while performing AC and DC Machines Experiments.

The design of the control unit ensures to get the highest quality practical experience to user. All the necessary protective measures are taken to avoid fault or danger.

Note: All AC & DC Machines along with supporting accessories are available optionally

Features

1. Compatible for Machines upto 2HP
2. Equipped with Measurement Facilities for Experimentation on AC Machines, DC Machines and Transformers
3. Separate AC and DC Measuring Sections
4. Diagrammatic representation of AC and DC Machines for better understanding
5. Rust Free Powder Coating Paint
6. Standard BS-10 terminals, patch cords for safety purpose
7. Terminals provided to obtain Three Phase Fixed as well as Variable AC and DC Supplies with suitable protection
8. High Quality Digital Tachometer for RPM Measurement
9. Motors provided with standard Mechanical Loading Arrangement Facility
10. Motors with “aluminum” casted Brake-Drum/Pulley with heat suppression facility
11. Machines with Class “B” Insulation
12. Flexible shaft coupling arrangement (Lovejoy) for Motor Generator (MG) Sets
13. Machines provided with Heavy Duty Base/Channel with suitable interconnection
14. Machines provided with suitable protections such as MCB's, Fuses, Motor Generator (MG) Sets provided with coupling protective cover
15. Generator with Electrical Loading Arrangement Facility
16. Durable good quality spring balance
17. Designed by considering all the safety measures

Technical Specifications

Electrical Measuring Instruments

AC Ammeter (4 Nos.)

Type : Digital

Range : 10A

AC Voltmeter (4 Nos.)

Type : Digital

Range : 450Vrms

DC Ammeter (4 Nos.)

Type : Digital

Range : 20A

DC Voltmeter (4 Nos.)

Type : Digital

Range : 300V

Single Phase Wattmeter (2 Nos.)

Type : Digital

Range : 4kW

DC Supply (for excitation purpose only)

Voltage : 300V ± 10%

Current : 2Amp

DC Power Supply

DC Output Voltage (Fixed) : 220V ± 10%, 2A

DC Output Voltage (Variable) : 220V ± 10%, 15A

Protective Devices

Three Phase MCB (TPN) : 2 Nos.

Interconnections : 4mm BS-10 Safety Terminals

Object

DC Machines (optional)

DC Shunt Wound Motor

1. Study of Operational Working and Principle of DC Shunt Motor
2. Study of running and reversing phenomenon of DC Shunt Motor
3. Study of No Load Characteristic of DC Shunt Motor
4. Study of Load Characteristic of DC Shunt Motor
5. Study of speed control of DC Shunt Motor using armature voltage control and flux field control method
6. Study and Determine the losses of DC Machine and correspondingly calculate the efficiency of DC Machine by Swinburn's Test Method

DC Series Wound Motor

1. Study of Operational Working and Principle of DC Series Motor
2. Study of running and reversing phenomenon of DC Series Motor
3. Study of Load Characteristic of DC Series Motor
4. Study of speed control of DC Series Motor using armature voltage control and flux field control methods

DC Compound Wound Motor

1. Study of Operational Working and Principle of DC Compound Motor
2. Study of running and reversing phenomenon of DC Compound Motor
3. Study of Load Characteristic of DC Cumulative-Compound Wound Motor
4. Study of Load Characteristic of DC Differential-Compound Wound Motor

DC Shunt Wound Generator

1. Study of Operational Working and Principle of DC Shunt Generator
2. Study and measurement of Open Circuit Characteristic of DC Shunt Generator
3. Study and measurement of External Characteristic of DC Shunt Generator
4. Study and measurement of Internal Characteristic of DC Shunt Generator

DC Series Wound Generator

1. Study of Operational Working and Principle of DC Series Wound Generator
2. Study and measurement of Open Circuit Characteristic of DC Series Generator
3. Study and measurement of Load Characteristic of DC Series Generator
4. Study and verify the Field Test of DC Series Machine and correspondingly determine the efficiency of DC Series Motor and Generator at any desire load

DC Compound Wound Generator

1. Study of Operational Working and Principle of DC Compound Wound Generator
2. Study and verify the Load Characteristics of Long Shunt Cumulatively Compound Generator
3. Study and verify the Load Characteristics of Short Shunt Cumulatively Compound Generator
4. Study and verify the Load Characteristics of Long Shunt Differentially Compound Generator
5. Study and verify the Load Characteristics of Short Shunt Differentially Compound Generator

AC Machines (optional)

Single Phase Capacitor Start Induction Motor

1. Study of Operational Working and Principle of Single Phase Induction Motor
2. Study of Running and Reversing of Single Phase Induction Motor
3. Study of the No-Load Test in a Single Phase Induction Motor
4. Study of the Blocked Rotor Test in a Single Phase Induction Motor
5. Study of Load Test in a Single Phase Induction Motor

Three-phase Squirrel Cage Induction Motor

1. Study of Operational Working and Principle of Three Phase Squirrel Cage Induction Motor
2. Study of Running and Reversing of Three Phase Induction Motor
3. Study of No Load Test performed in a Three Phase Induction Motor
4. Study of Block Rotor Test performed in a Three Phase Induction Motor
5. Measurement of Slip in a Three Phase Induction Motor
6. Study of Speed-Torque characteristics in a Three Phase Induction Motor

Three Phase Salient Pole Synchronous Motor

1. Study of Operational Working and Principle of Three Phase Synchronous Motor
2. Study of V curve of Three Phase Synchronous Motor
3. Study of Inverse V curve of the Three Phase Synchronous Motor

Three Phase Salient Pole Synchronous Generator

1. Study of Operational Working Principle of Three Phase Synchronous Generator
2. Study and Measurement of Positive Sequence Impedance of Three Phase Synchronous Generator
3. Study and Measurement of Negative Sequence Impedance of Three Phase Synchronous Generator
4. Study and Measurement of Zero Sequence Impedance of Three Phase Synchronous Generator
5. Study of short circuit characteristics (SCC) of three Phase Synchronous Generator
6. Study of open circuit characteristics (OCC) of three Phase Synchronous Generator
7. Study and measure of voltage regulation of Three Phase Synchronous Generator using EMF Method

Single Phase Transformer:

1. Study of Single-Phase Isolation Transformer
2. Study of Single-Phase Step Up Transformer
3. Study of Single-Phase Step Down Transformer
4. Study of Subtractive Polarity of Single Phase Transformer
5. Study of Additive Polarity of Single-Phase Transformer
6. Study of Open Circuit test of Single-Phase Transformer
7. Study of Short Circuit Test of Single-Phase Transformer

To determine the Efficiency and Voltage Regulation of a Single-Phase Transformer by direct loading at different loading condition.

Three Phase Transformer:

1. Study of Open Circuit test of Three-Phase Transformer
2. Study of Short Circuit Test of Three-Phase Transformer
3. Study of Three Phase Configurations in Three Phase Transformer

**More than 70 Experiments can be performed in 46967

**Also suitable for performing experiments on basic Electrical Measurements

Technical Specifications of Optional Machines

DC Motors (optional)

Machine Specification Type - Shunt

Power Rating : Available with 1/2HP, 1HP& 2HP

Voltage Rating : 220V DC ± 5%

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

Loading arrangement : Mechanical

Spring Balance : 2Nos.(Tubular Type)

Brake Drum/Pulley : Aluminum casted with heat suppression facility

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

Machine Specification Type - Series

Power Rating : Available with 1HP&2HP

Voltage Rating : 220V DC ± 5%

Insulation : Class 'B’

Loading arrangement : Mechanical

Rated Speed : 1500RPM ± 7.5%

Spring Balance : 2Nos. (Tubular Type)

Brake Drum/Pulley : Aluminum casted with heat suppression facility

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

Machine Specification Type - Compound

Power Rating : Available with 1HP & 2HP

Voltage Rating : 220V DC ± 5%

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B'

Loading arrangement : Mechanical

Spring Balance : 2Nos.(Tubular Type)

Brake Drum/Pulley : Aluminum casted with heat suppression facility

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

AC Motors (optional)

Machine Specification - Single Phase Induction Motor

Type : Single phase Capacitor Start Induction Motor

Power Rating : Available with 1HP

Voltage Rating : 230V AC ± 5%, 50Hz

Rated Speed : 1440RPM ± 7.5%

Insulation : Class 'B’

Loading arrangement : Mechanical

Spring Balance : 2 Nos. (Tubular Type)

Brake Drum/Pulley : Aluminum casted with heat suppression facility

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

Machine Specification - Three Phase Squirrel Cage Induction Motor

Type : Three Phase Squirrel Cage Induction Motor

Power Rating : Available with 1HP & 2HP

Voltage Rating : 415V AC ± 5%, 50Hz

Rated Speed : 1440RPM ± 7.5%

Insulation : Class 'B’

Loading arrangement : Mechanical

Spring Balance : 2 Nos. (Tubular Type)

Brake Drum/Pulley : Aluminum casted with heat suppression Facility

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

Single Phase Transformer (optional)

Transformer Specifications

Mains Supply : Single Phase, 230V AC ±10%, 50Hz

Rating : 1kVA

Primary Voltage : 0-125V, 0-125V

Secondary Voltage : 0-125V, 0-125V

Rated Current : 5A

Three Phase Transformer (optional)

Transformer Specifications.

Mains Supply : 415V ±10%, 50Hz

Type : Three Phase

Power Rating : 1kVA

Primary Voltage : 415V

Secondary Voltage : 230V

Rated Current : 4A

DC Generators (optional)

Machine Specification

Both the Machines are flexibly coupled and Mounted on a Single 'C' Channel Base DC Machine (acts as prime mover)

Type : Shunt

Voltage Rating : 220V DC ± 5%

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

DC Machine (acts as generator)

Type : Shunt

Power Rating : Available with 0.5HP, 1HP & 2HP

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

Shaft extension : Single Sided

Loading Arrangement : Electrical

Type of Coupling : Flexible “Lovejoy” Coupling

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

Machine Specification

Both the Machines are flexibly coupled and Mounted on a Single 'C' Channel Base DC Machine (acts as prime mover)

Type : Shunt

Voltage Rating : 220V DC ± 5%

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

DC Machine (acts as generator)

Type : Series

Power Rating : Available with 1HP & 2HP

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

Shaft extension : Single Sided

Loading Arrangement : Electrical

Type of Coupling : Flexible “Lovejoy” Coupling

Machine Base : “C” Channel

Protection : Fuses(mounted at the terminal box of the Machines)

Machine Specification

Both the Machines are flexibly coupled and Mounted on a Single 'C' Channel Base

DC Machine (acts as prime mover)

Type : Compound

Voltage Rating : 220V DC ± 5%

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

DC Machine (acts as generator)

Type : Compound

Power Rating : Available with 1HP & 2HP

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

Shaft extension : Single Sided

Loading Arrangement : Electrical

Type of Coupling : Flexible “Lovejoy” Coupling

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

AC Generators (optional)

Machine Specification

Both the Machines are flexibly coupled and Mounted on a Single 'C' Channel Base

Three Phase Synchronous Machine

Type : Salient Type

Power Rating : 3 HP

Voltage Rating : 415V AC ± 10%, 50Hz

Configuration : “Delta” Connected

Rated Speed : 1500RPM ± 5%

Insulation : Class 'B’

Excitation Voltage : 180Vdc ± 10%

DC Machine (acts as generator)

Type : Shunt

Power Rating : 2HP

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

Loading Arrangement : Electrical

 Type of Coupling : Flexible “Lovejoy” Coupling

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

Machine Specification

Both the Machines are flexibly coupled and Mounted on a Single 'C' Channel Base

DC Machine

Type : Shunt

Power Rating : 2HP

Voltage Rating : 220V DC ± 5%

Rated Speed : 1500RPM ± 5%

Insulation : Class 'B’

Three Phase Synchronous Machine

Type : Salient Type

Configuration : "Star" Connected

Power Rating : 3HP

Voltage Rating : 415V AC ± 5%, 50Hz

Rated Speed : 1500RPM ± 7.5%

Insulation : Class 'B’

Excitation Voltage : 180Vdc ± 10%

Loading Arrangement : Electrical

Type of Coupling : Flexible “Lovejoy” Coupling

Machine Base : “C” Channel

Protection : Fuses (mounted at the terminal box of the Machines)

Other Supporting Optional Items

Single and Three Phase Resistive Load

Single Phase Operation

Voltage : 240V AC ±10%, 50Hz

Current : 15A

Power : 3.5kW

Loading steps : 15

Three Phase Star Operation

Voltage : 415V AC ±10%, 50Hz

Current : 5A (per Phase)

Power : 3.5kW

Loading steps : 5 (per Phase)

Three Phase Delta Operation

Voltage : 415V AC ±10%, 50Hz

Current : 15A (per Phase)

Power : 10.5kW

Loading steps : 5 (per Phase)

Switching Technique : Star/Delta Switch, 415V, 25A

Mains MCB : 16A (TPN)

Three Phase Inductive Load

Three Phase Star Operation

Voltage : 415V AC ±10%, 50Hz

Current : 10A (per Phase)

Single and Three Phase Capacitive Load

Single Phase Operation

Voltage : 230V AC ±10%, 50Hz

Current : 14A (Approx.)

Loading steps : 30

Three Phase Star Operation

Voltage : 415V AC ±10%, 50Hz

Current : 4.6A (per Phase)

Loading steps : 10 (per Phase)

Three Phase Delta Operation

Voltage : 415V AC ±10%, 50Hz

Current : 13A (per Phase)

Loading steps : 10 (per Phase)

Switching Technique : Star/Delta Switch, 415V, 25A

Mains MCB : 16A (TPN) 10A (One Pole) 30 Nos.

Thyristorized DC Regulated Power Supply

Input Mains : 415VAC ± 10%, 50Hz

Rated Output Voltage : 220VDC (Fixed) ± 5%,

Rated Output Current : 50ADC

Regulation : Less than 3% at full load condition.

Measuring Instruments

AC Voltmeter : 1 No. (with voltage selector switch)

DC Ammeter : 1 No.

DC Voltmeter : 1 No.

Protection with its indicators

Overload Protection

Short Circuit Protection

Phase Sequence Indicator

Single Phase Variac

Type : Close Type

Operating Rating : 230V AC ±10%, 50Hz

Output Voltage : 0 - 270V AC ±10%, 50Hz

Current : 10A (Also available in different Current Ratings)

Three Phase Variac

Type : Close Type

Operating Rating : 415V AC ±10%, 50Hz

Output Voltage : 0 - 470V AC ±10%, 50Hz

Current : 10A (Also available in different Current Ratings)

Rheostats

DC Starters

AC Starters