SCR DC Circuit Breaker
Product Code : JA-PET-1428
The SCR DC circuit breaker trainer shows an SCR used as a DC circuit breaker that trips when the current exceeds a set limit. It works on 30 V DC, the trip point is adjustable from 100 mA to 1.8 A, and an electronic crowbar circuit demonstrates over-voltage and over-current trips under DC conditions (SKU JA-PET-1428).
Specifications
The circuit breaker board has these listed parts and ratings:
| Product | SCR DC Circuit Breaker |
| SKU | JA-PET-1428 |
| Operating supply | 30 V DC at 2 A |
| Trip adjustment | 100 mA to 1.8 A |
| SCRs | Two: one main, one auxiliary that turns the main SCR off |
| Push buttons | Two: one triggers the main SCR, one the auxiliary SCR |
| UJTs | Two, in relaxation oscillator mode |
| UJT supply | 20 V DC, zener stabilised |
| Limit controls | Two potentiometers for the over-voltage and over-current limits |
| Load and commutation | Capacitor bank and resistance bank |
| Protection | Fuse in the DC supply |
| Patch cords | 4 mm stackable spring-loaded plugs, 0.5 m |
| Weight | 4 kg approx. |
| Dimensions | W 412 x H 150 x D 310 mm |
| Other apparatus required | Digital multimeter (3¾ digit); 0-30 V DC, 2 A regulated power supply; dual trace CRO 20 MHz (unearthed) |
Experiments on the SCR circuit breaker board
The listed studies are:
- SCR turn-off action under varying loads, using the capacitor and resistance banks
- DC over-voltage trip action
- Over-current trip action
Scope of supply and ordering
The listing covers the SCR circuit breaker board with patch cords and operating instructions, supplied by JaincoLab; the 30 V DC, 2 A supply is listed as other apparatus required. Lead time and packing depend on the order size and are confirmed when we quote.
Frequently asked questions
What trip range can be set on the SCR circuit breaker?
The breaker can be adjusted from 100 mA to 1.8 A on a 30 V DC supply.
How is the main SCR turned off?
A second push button triggers the auxiliary SCR, which turns the main SCR off; a capacitor bank lets students study commutation under different loads.
Does the board demonstrate crowbar protection?
Yes. It includes electronic crowbar circuitry showing over-voltage and over-current trips under DC conditions.
Related products
- SCR Ring Counter
- SCR Regulated DC Power Supply
- DV and DT Limitation Of SCRS
- SCR Converters and Reactive Loads
Browse the full power electronics trainers range for related items.
Request a quote
Send your requirement for the SCR DC Circuit Breaker to [email protected] or use the contact page. For tender or project supply, see our tenders page.
