DV/DT Limitation of SCRs Manufacturer,Supplier and Exporter in India
Product Code : ILS-EELE-10417
Indian Lab Suppliers supplies the DV/DT Limitation of SCRs (Product ID: 10417) as part of its electronics engineering lab equipment range. It is a trainer that shows how a fast-rising anode voltage (dv/dt) can turn on an SCR without a gate pulse, and how snubbers prevent it.
Quick Answer
A thyristor switch applies a sudden voltage from the built-in 300 V DC, 250 mA supply across the SCR under test, and a visual indicator shows whether it fires. The rising voltage drives a charging current through the SCR junction capacitance (i = C dv/dt); if that current is large enough the device turns on falsely. Students compare a gate-cathode termination resistor, two R-C snubber schemes and a transistorised snubber. The unit runs on 230 V ±10%, 50 Hz, weighs about 3 kg and measures 340 x 110 x 210 mm; patch cords and operating instructions are supplied.
Key Specifications
| Parameter | Detail |
|---|---|
| Test supply | 300 V DC, 250 mA, built in |
| Voltage step | Thyristor switch for sudden voltage |
| Protection studied | Two R-C snubber schemes, transistorised snubber, gate-cathode resistor |
| Indication | Visual SCR firing indicator |
| Mains | 230 V ±10%, 50 Hz; switch, fuse, indicator lamp |
| Size and weight | 340 x 110 x 210 mm (W x H x D), about 3 kg |
Where This Is Used
Used in power electronics labs with Universal Motor Speed Control (Product ID: 10416) and SCR Regulated D.C. Power Supply (Product ID: 10415). The board holds 300 V DC: switch off and let the supply discharge before changing connections. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
What causes dv/dt triggering?
Charging current through the SCR junction capacitance, i = C dv/dt.
Which protection methods are compared?
Two R-C snubbers, a transistorised snubber and a gate-cathode resistor.
What test voltage is used?
A built-in 300 V DC, 250 mA supply.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Electricity and Magnetism
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