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SCR DC Circuit Breaker

SCR DC Circuit Breaker

Product Code : JL-PET-1428

SCR DC Circuit Breaker

  • Power Electronic Training Board has been designed specifically to study the SCR as D.C. circuit breaker when the D.C. circuit exceeds specified limit.
  • The set up works on 30V D.C. and permits the circuit breaker to be adjusted from 100mA to 1.8 Amp.
  • This Training Board also includes Electronic Crow Bar circuitry to demonstrate the over voltage and over current trip under D.C. Condition.
  • Practical experience on this board carries great educative value for Science and Engineering Students.


  • To study SCR turn OFF action under varying loads.
  • To study D.C. over voltage trip action.
  • To study over current trip action.


The board consists of the following built-in parts:

  • 20V D.C. Zener Stabilized Power Supply for UJTs.
  • Two SCRs, one main and one auxiliary.
  • Two push button switches, one to trigger the main SCR and other to trigger the auxiliary SCR which turns the main SCR OFF.
  • Two UJTs connected in relaxation oscillator mode.
  • Two potentiometers to adjust the over voltage and over current limit.
  • Capacitor bank to study commutation under different load.
  • Resistance bank for varying load.   
  • Adequate no. Of other Electronic Components.
  • Fuse protection in D.C. supply.
  • The unit is operative on 30V D.C. at 2 Amp.
  • 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 wave forms.
  • Strongly supported by detailed Operating Instructions, giving details of Object, Theory, Design procedures, Report Suggestions and Book References


  • 4 Kg. (Approx.)


  • W 412 x H 150 x D 310

Other Apparatus Required:

  • Digital Multimeter 3¾ digit - Order Code 16901
  • 0-30V D.C.-2 Amp, IC Regulated Power Supply
  • Dual Trace Cathode Ray Oscilloscope 20MHz (Unearthed)


  • Specifications are subject to change.

Other Information:

Pay Mode Terms: 

  • T/T (Bank Transfer)

Port of Dispatch: 

  • India

Delivery Time: 

  • 4 weeks

Packaging Details: 

  • Corrugated Box

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Office Address

Jain Laboratory Instruments Pvt. Ltd.
Hargolal Road, Ambala Cantt,
Haryana India



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