NAUGRA EXPORT

Ambala Cantt, Ambala, Haryana

DV/DT Limitation of SCRs.DV/DT Limitation of SCRs

The offered range is known for enhancing the Dv/Dt capability of SCRs to avoid false firing which may be disastrous in some applications. This range is also known for designing and studying various snubber circuits to improve the Dv/Dt capability of thyristors.

Objects:

• Test dv/dt estimation of the SCR
• Compare Dv/Dt capability by gate-cathode terminations
• Compare Dv/Dt capability by gate-cathode biasing (voltage biasing)
• Compare Dv/Dt capability by gate-cathode biasing (current biasing)
• To improve Dv/Dt capability by transistor snubber circuit
• Effect of R.C. snubber circuit on Dv/Dt capability
• Study of different scheme of R.C. Snubber circuit on Dv/Dt capability

Built in parts:

• 300 V D.C. at 250 mA, power supply internally connected
• Thyristor switch for applying sudden voltage on the SCR under experiment
• The SCR under experiment
• Resistance for gate-cathode termination
• Silicon diode
• Transistorized snubber circuit
• Two schemes for R-C snubber circuits
• Visual indication to indicate SCR firing
• Adequate no. of other electronic components
• Mains ON/OFF switch, fuse and jewel light

Specifications:

• The unit is operative on 230 V 10% at 50 Hz A.C. mains
• Adequate no. of patch cords stackable 4 mm spring loaded plug length meter
• Good quality, reliable terminal/sockets are provided at appropriate places on panel for connections/ observation of waveforms
• Strongly supported by detailed operating instructions, giving details of object, theory, design procedures, report suggestions and book references
• Weight: 3 kg. (approx.)
• Dimension: W 340 x H 110 x D 210

Analog Lab.

Verification of Ohms Law Series & Parallel Circuits.Verification of Ohms Law Series & Parallel Circuits The board consists of the following built-in parts:1. 0-15 VD.C. at 100 mA, continuously variable regulated Power Supply.2. D.C. Voltmeter, 65mm rectangular dial to read 0-15V D.C.3. D.C. Milliammeter, 65mm rectangular dial to read 0-50mA D.C.4. Adequate no. of other electronic components.5. Mains ON/OFF switch, Fuse and Jewel light.

• The unit is operative on 230V 10% at 50Hz A.C. Mains.
• Adequate no. of patch cords stackable from rear both ends 4mm spring loaded plug length metre.
• Good Quality, reliable terminal/sockets are provided at appropriate places on panel for connections/observation of waveforms.
• Strongly supported by detailed Operating Instructions, giving details of Object, Theory, Design procedures, Report Suggestions and Book References.
• Weight :3Kg. (Approx.)
• Dimension :W340 xH110 xD210

Advanced Digital Logic Lab.

Digital Logic Lab.

• Suitable for combination logic, sequential logic and microprocessor circuits design and experiments
• Ideal tool for learning the basics of digital logic circuits
• Comprehensive power, signal supply and testing devices for convenient experiments
• Experiments are expandible and flexible with universal breadboard
• Capable of processing TTL, CMOS, NMOS, PMOS and ECL circuits
• All supply units are equipped with overload protection for safety purpose
• All modules equipped with 8-bit DIP switch for fault simulation
• Individual keeping cases for all modules for easy storing and carrying
• All signal generators have independent and simultaneous TTL and CMOS level output terminal.

The Digital Logic Lab is a comprehensive and self-contained system suitable for anyone engaged in digital logic experiments.

All necessary equipment for digital logic experiments such as power supply, signal generator, switches and displays are installed on the main unit.

PLC Process Trainer.PLC Process Trainer ManufacturerTeaching objectives
To study automated control system associated to the hydraulic facilities (pump speed driving, level measurement, vessel draining, vessel stirring).Identification of the sensors, actuators, process to control, signals processing.Writing of a GRAFCET program.Permits more other to study a control loop with the introduction of an analogical measurement and an analogical action.To calibrate an analogical sensor and to study its linearity.PID single variable control loop (pH).Measurement of the input/output of the controller.Identification of the components (controller, actuator, sensor, process).Definition of the variables.Set point.Measure.gap variable.Adjusting size.Controlled size.Disruptive size.Algorithm Control (ON/OFF, PID).
Technical specifications
The system is made up of a mixing stirred vessel feed by two other vessels. Each vessel is equipped with an electric draining valve, a manual draining valve and a low level probe. The mixing stirred vessel is equipped with an additional high level probe.This table top bench is made up of a stainless steel frame mounted on 4 feet with a PVC panel.3 vessels3 solenoid valves4 level detectorsA stirrer (motor and propeller)A control cabinet including :1 section switch with lock1 emergency stop button1 rearmament button, 1 ON light , 1 start button and 1 cycle stop, 4 switches, the PLC wiring terminalsThe control and the stirrer safety device1 transformer 24V, relay, solenoid valve, 1 contactor, 1 DC power supply 24V for the PLC.It is made up of the same components with the bellow additional components:A pH control loop managed by the PID function of thePLC. It is made up of :A pH probe measurementA transmitter pH/I (4-20 mA), A peristaltic pump in 110V, with speed driverA feeding vat of the acid or the base
Options:
Bench is proposed with two optional PLC:
Option 1
1 PLC Schneider.
Option 2
1 PLC Schneider Micro.
Bench is proposed with two optional PLC:
Option 1
1 PLC Schneider TWIDO.1 digital control screen Magelis for the communication man / Machine.
Option 2
1 PLC Schneider Micro.1 digital control screen Magelis for the communication man / Machine.
Essential requirements (Dimensions (L x w x h)
1000 x 400 x 1200 mm1200 x 600 x 950 mm
Power supply :
220 V mono, 0, 15 kW220 V mono, 0, 3 Kw

Fuel Cell Technology Trainer.Fuel Cell Technology Trainer Manufacturer
The Fuel Cell Technology Trainer allows the student to create a grid-independent power supply that uses only hydrogen as its fuel. The system familiarizes the student with fuel cell power supply technology, an environmentally friendly method of generating power directly from a hydrogen reaction. Fuel cells are the most promising alternate energy supply and are already being used in a number of areas, including automotive engineering and power generation systems. The can also be connected to an external energy source, such as a solar panel or wind generator, for comparison between the different technologies. A switch located on the panel allows for switching between the fuel cell and an external source

Electric Circuits Lab.