Study of SCR and A.C. Phase Control with Power Supply Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12880
Indian Lab Suppliers supplies the Study of SCR and A.C. Phase Control with Power Supply (Product ID: 12880) as part of its electronics engineering lab equipment range. It is a power electronics board for ten experiments on SCR triggering and AC phase control, from simple resistance triggering to UJT ramp-and-pedestal circuits.
Quick Answer
Students begin with resistance triggering, where the SCR acts as a half-wave static switch with a limited control range, then use RC triggering for full-range half-wave and bridge full-wave control. UJT trigger circuits follow: resistance-controlled ramps for half-wave control, inverse-parallel SCRs and a half-controlled bridge, then a series-transistor ramp, a shunt-transistor pedestal, and ramp-and-pedestal schemes including a cosine-modified ramp. The board has three SCRs, a 2N2646 UJT, a 1:1:1 pulse transformer, a bridge rectifier with zener regulator, and two potentiometers each for ramp and pedestal. It runs from 230 V ±10%, 50 Hz mains through a 230 V, 250 mA isolation transformer.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | 10 SCR trigger and AC phase-control circuits |
| Power devices | 3 SCRs for half-wave and inverse-parallel full-wave control |
| Trigger parts | UJT 2N2646, 1:1:1 pulse transformer |
| Controls | 2 ramp potentiometers, 2 pedestal potentiometers |
| Supply parts | Isolation transformer 230 V AC, 250 mA; bridge rectifier with zener regulator |
| Mains | 230 V ±10%, 50 Hz; ON/OFF switch, fuse and indicator lamp |
| Connections | 4 mm stackable patch cords, 0.5 m |
Where This Is Used
Used with the Study of Triac and A.C.Phase Control (Product ID: 12882) and the Study of UJT and UJT Relaxation Oscillator with Power Supply (Product ID: 12879) in phase-control practicals. The power circuits operate at mains voltage, so make connections with the supply off. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
Why does resistance triggering give limited control?
The gate current is in phase with the supply, so firing can be delayed only up to 90°.
What does the pedestal add?
A DC pedestal plus a ramp gives smooth firing-angle control over a wide range.
How many SCRs are fitted?
Three.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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