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 ½ 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