UJT Firing of SCR Technique

The UJT Firing of SCR Technique Trainer is designed for studying the triggering and firing of SCRs using a UJT-based firing circuit. It provides a practical platform for understanding firing angle control, SCR operation, and phase control techniques. The trainer includes an isolated AC power supply, SCR assembly, UJT, pulse transformer, potentiometer, and associated electronic components for practical experimentation. The unit is housed in an ABS plastic cabinet and features a clearly printed insulated circuit board for easy operation. Designed and manufactured by Atico Export to meet the practical demands of modern laboratories.

Power Supplies:

• Isolated AC power supply: 0–12 V, 500 mA.
• Isolated AC power supply: 0–250 V, 250 mA.
• Mains operated: 230 V, 50 Hz ±10%.

Components Mounted on Panel:

• SCR assembly.
• 12 V lamp as resistive load.
• UJT.
• Pulse transformer: 1:1:1.
• Firing angle control through potentiometer.
• Diodes, capacitors, and resistors.

• Fuse protection against short-circuit conditions.
• Front panel with high-class insulated printed circuit board featuring clearly printed circuits and symbols.
• Instruction manual.
• 2 mm patch cords.
• High-voltage test points with 2 mm sockets.
• Housed in an ABS plastic cabinet.
• Trainer size: 12 × 8 inches.