Triggering Circuits for SCR

Triggering Circuits for SCR .

Power Electronic Training Board has been designed specifically for the study of SCR Triggering circuits. Practical experience on this board carries great educative value for Science and Engineering Students.

Object:

To study the SCR Triggering circuits using:

• 0Resistor (R) Triggering circuit
• Resistor - capacitor (R-C) Triggering circuit
• Uni-junction Transistor (UJT) Triggering circuit (UJT relaxation Oscillator)
• Half-wave controlled rectifier
• Full-wave controlled rectifier

Features:

The board consists of the following built-in parts:

• 35VA.C. at 100mAA.C. Power Supply
• Bridge rectifier for making D.C. voltage
• Two Silicon controlled rectifier (SCR)
• Uni junction Transistor
• Pulse transformer 1:1
• Two potentiometer for varying load
• Two potentiometer one for controlling SCR firing angle and other for controlling UJT firing angle
• Adequate no. of other Electronic Components
• 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 4 mm spring loaded plug length ½ 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 : 3 Kg. (Approx.)
• Dimension : W 340 x H 110 x D 210

Other Apparatus Required:

• Dual Trace Cathode Ray Oscilloscope 20MHz (Unearthed)