S.C.R. DC Circuit Breaker Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12893
Indian Lab Suppliers supplies the S.C.R. DC Circuit Breaker (Product ID: 12893) as part of its electronics engineering lab equipment range. It uses an SCR as a DC circuit breaker that trips when current or voltage exceeds a set limit.
Quick Answer
The breaker runs on 30 V DC and its trip point can be set from 100 mA to 1.8 A. A main SCR carries the load current; firing an auxiliary SCR discharges a capacitor across it and turns it off. Two UJT relaxation oscillators, fed from a 20 V DC zener-stabilised supply, and two potentiometers set the over-voltage and over-current limits, and a crowbar circuit demonstrates the over-voltage trip. A capacitor bank and resistance bank let students study commutation under different loads, and push buttons fire each SCR by hand. The unit needs a 30 V DC, 2 A supply; please confirm at quotation whether it is included.
Key Specifications
| Parameter | Detail |
|---|---|
| Operating supply | 30 V DC, 2 A (please confirm if supplied) |
| Trip range | 100 mA to 1.8 A |
| Devices | Main SCR and auxiliary SCR; 2 UJT oscillators |
| Control supply | 20 V DC, zener stabilised |
| Limits | Over-voltage and over-current potentiometers; crowbar circuit |
| Banks | Capacitor bank; resistance load bank |
| Controls | 2 push buttons |
| Protection | Fuse in DC supply |
Where This Is Used
Used in protection practicals with the Forced Commutated Circuits with Power Supply (Product ID: 12906) and the Determination of fusing characteristics and fusing factor of given fuse (Product ID: 12932). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How is the main SCR turned off?
Firing the auxiliary SCR puts a charged capacitor across it, reverse-biasing it.
What trip range can be set?
From 100 mA to 1.8 A.
What is a crowbar circuit?
A circuit that shorts the supply through an SCR on over-voltage so the fuse or breaker opens.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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