Thyristor Time Delay Relay

Product Code: JL--1421

Power Electronic Training Board 

Study of delayed Turn-ON of D.C. load

Study of auto Turn-OFF of D.C. load

Study of delayed Turn-ON of TRIAC as line switch

Study of auto Turn-OFF of TRIAC as line switch


The board consists of the following built in parts:


12V D.C. at 2 Amp, Power Supply internally connected

UJT 2N 2646 used as timer

Potentiometer for ramp control to adjust time delay

Set of 3 Capacitors for time delay control

Two SCRs connected in parallel coupled mode

Commutation capacitor.

Push button switch for starting

TRIAC for A.C. line switch

Lamp holder with 15 watt 230V lamp for A.C. load

Adequate no. of other Electronic Components

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

Digital Multimeter 3¾ digit - Order Code 16901

Digital Stop Clock