Nvis 7089A Electrical Machines, Motors & Transformers Workstation up to 2HP

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. Nvis 7089A 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 inter facing 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 per forming 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

- Compatible for Machines upto 2HP.
- Equipped with Measurement F acilities for Experimentation on AC Machines, DC Machines and Transformers.
- Separate AC and DC Measuring Sections.
- Diagrammatic representation of AC and DC Machines for better understanding.
- Rust Free Powder Coating Paint.
- Standard BS-10 terminals, patch cords for safety purpose.
- Terminals provided to obtain Three Phase Fixed as well as V ariable AC and DC Supplies with suitable protection.
- High Quality Digital T achometer for RPM Measurement which is also interfaced with DAQ (Data Acquisition System).
- Motors provided with standard Mechanical Loading Arrangement Facility.
- Motors with 'aluminum' casted Brak e-Drum/Pulley with he at suppression facility.
- Machines with Class 'B' Insulation.
- Flexible shaft coupling arrangement (Lovejoy) for Motor Generator (MG) Sets.
- Machines provided with Heavy Duty Base/Channel with suitable interconnection.
- Machines provided with suitable protections such as MCB's, F uses, Motor Generator (MG) Sets provided with coupling protective cover.
- Generator with Electrical Loading Arrangement Facility.
- Durable good quality spring balance.
- Designed by considering all the safety measures.

+ 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: 1.5kW

- DC Supply

Voltage: 300V ± 10%
Current: 2Amp

- Protective Devices

Three Phase MCB (TPN): 2 Nos.

- Interconnections

4mm BS-10 Safety Terminals

+ DC Machines

- DC Shunt Wound Motor

• Study of Operational Working and Principle of DC Shunt Motor
• Study of running and reversing phenomenon of DC Shunt Motor
• Study of No Load Characteristic of DC Shunt Motor
• Study of Load Characteristic of DC Shunt Motor
• Study of speed control of DC Shunt Motor using armature voltage control and flux field control method
• 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

• Study of Operational Working and Principle of DC Series Motor
• Study of running and reversing phenomenon of DC Series Motor
• Study of Load Characteristic of DC Series Motor
• Study of speed control of DC Series Motor using armature voltage control and flux field control methods

- DC Compound Wound Motor

• Study of Operational Working and Principle of DC Compound Motor
• Study of running and reversing phenomenon of DC Compound Motor
• Study of Load Characteristic of DC Cumulative-Compound Wound Motor
• Study of Load Characteristic of DC Differential-Compound Wound Motor

- DC Shunt Wound Generator

• Study of Operational Working and Principle of DC Shunt Generator
• Study and measurement of Open Circuit Characteristic of DC Shunt Generator
• Study and measurement of External Characteristic of DC Shunt Generator
• Study and measurement of Internal Characteristic of DC Shunt Generator
• Study and obtain the losses separately and correspondingly. Determine the efficiency of a DC Shunt Machine by Hopkinson's test

- DC Series Wound Generator

• Study of Operational Working and Principle of DC Series Wound Generator
• Study and measurement of Open Circuit Characteristic of DC Series Generator
• Study and measurement of Load Characteristic of DC Series Generator
• 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

• Study of Operational Working and Principle of DC Compound Wound Generator
• Study and verify the Load Characteristics of Long Shunt Cumulatively Compound Generator
• Study and verify the Load Characteristics of Short Shunt Cumulatively Compound Generator
• Study and verify the Load Characteristics of Long Shunt Differentially Compound Generator
• Study and verify the Load Characteristics of Short Shunt Differentially Compound Generator

+ AC Machines

- Single Phase Capacitor Start Induction Motor

• Study of Operational Working and Principle of Single Phase Induction Motor
• Study of Running and Reversing of Single Phase Induction Motor
• Study of the No-Load Test in a Single Phase Induction Motor
• Study of the Blocked Rotor Test in a Single Phase Induction Motor
• Study of Load Test in a Single Phase Induction Motor

- Three-phase Squirrel Cage Induction Motor

• Study of Operational Working and Principle of Three Phase SquirrelCage InductionMotor
• Study of Running and Reversing of Three Phase Induction Motor
• Study of No Load Test performed in a Three Phase Induction Motor
• Study of Block Rotor Test performed in a Three Phase Induction Motor
• Measurement of Slip in a Three Phase Induction Motor
• Study of Speed-Torque characteristics in a Three Phase Induction Motor

- Three Phase Salient Pole Synchronous Motor

• Study of Operational Working and Principle of Three Phase Synchronous Motor
• Study of V curve of Three Phase Synchronous Motor
• Study of Inverse V curve of the Three Phase Synchronous Motor

- Three Phase Salient Pole Synchronous Generator

• Study of Operational Working Principle of Three Phase Synchronous Generator
• Study and Measurement of Direct Axis (Xd) Reactance by Slip Test
• Study and Measurement of Quadrature Axis (Xq) Reactance by SlipTest
• Study and Measurement of Positive Sequence Impedance of Three Phase Synchronous Generator
• Study and Measurement of Negative Sequence Impedance of Three Phase Synchronous Generator
• Study and Measurement of Zero Sequence Impedance of Three Phase Synchronous Generator
• Study of short circuit characteristics (SCC) of three Phase Synchronous Generator
• Study of open circuit characteristics (OCC) of three Phase Synchronous Generator
• Study and measure of voltage regulation of Three Phase Synchronous GeneratorusingEMFMethod

- Single Phase Transformer

• Study of Single-Phase Isolation Transformer
• Study of Single-Phase Step Up Transformer
• Study of Single-Phase Step Down Transformer
• Study of Subtractive Polarity of Single Phase Transformer
• Study of Additive Polarity of Single-Phase Transformer
• Study of Open Circuit test of Single-Phase Transformer
• 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

• Study of Open Circuit test of Three-Phase Transformer
• Study of Short Circuit Test of Three-Phase Transformer
• Study of Three Phase Configurations in Three Phase Transformer

**More than 70 Experiments can be performed in Nvis 7089A
**Also suitable for performing experiments on basic Electrical Measurements