Circuit Breaker Trainer
Product Code : LSK-EPS-10527
Circuit Breaker Trainer (SKU LSK-EPS-10527) shows how the most common circuit protection devices perform by letting students set a fault current in four separate circuits and compare fuses, magnetic, thermal and thermomagnetic circuit-breakers and residual current protection. It suits switchgear labs in B.Tech/B.E. and diploma electrical courses and ITI Electrician training. Institutes, colleges, tender contractors and distributors can have it priced by Science Lab Supplies, an Ambala, India supplier of engineering trainers.
Specifications
Every circuit breaker trainer detail is entered as its own row below. In short, an internal variable transformer works with the load to set the fault current in four circuits, each with a different protection device and a contact breaker on a discrepancy switch, while meters show incoming voltage and current.
| Specification | Value |
|---|---|
| SKU | LSK-EPS-10527 |
| Test circuits | Four, each with a different protection device |
| Fault current setting | Internal variable transformer working with the load |
| Protection devices | Fuses; magnetic only, thermal only and thermomagnetic circuit-breakers |
| Circuit one | Adjustable residual current detector |
| Residual current set-up | Digital display and switches to set the earth leakage fault current |
| Circuit two | Fuse tests, one fuse for each of the three phases |
| Fuse-break detector | Lamps show when each fuse breaks |
| Circuit three | Remote and local control key switches |
| Switching | Contact breaker in each circuit, switched by an industrial-standard discrepancy switch |
| Metering | Incoming voltage and current to the test circuits |
| Requirements | Suitable three-phase supply and load |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Circuit Breaker Trainer
With the trainer, students can raise the fault current step by step in each circuit and note when and how quickly each device trips. Comparing results shows how fuses, magnetic, thermal and thermomagnetic breakers respond differently, and how residual current detection reacts to earth leakage.
- B.Tech switchgear lab: fault current versus breaking time for different fuse types, with fast-blow fuse protection also seen on the Thyristor And Diode Converters.
- Trip behaviour of magnetic, thermal and thermomagnetic circuit-breakers.
- ITI Electrician and diploma training: earth leakage faults and residual current detection.
- Control room versus remote switching using the key switches; network-wide switching with blocking switches features on the Electrical Power System Simulator.
The trainer produces real fault currents from a three-phase supply; run it only under qualified supervision.
Standard Scope of Supply
The trainer is supplied with its four protection circuits and devices, internal variable transformer, contact breakers and discrepancy switches, fuse-break lamps, residual current detector with display, key switches and incoming meters. It works with a suitable three-phase supply and load, which can be discussed when quoting.
Packing, MOQ and Lead Time
Whether you are equipping one bench or a whole switchgear lab, we can quote the quantity you need. Packing, delivery time and price are stated for that quantity, and other protection trainers or load equipment from the range can be added.
Science Lab Supplies holds an Importer-Exporter Code, so it can ship to buyers in Bangladesh, Zambia, Rwanda, South Africa, Qatar and Sri Lanka. Send the number of benches you are fitting out through the contact page, or save the trainer in the enquiry cart; the lab tender page covers supply against tenders.
Frequently Asked Questions
What else is needed to run the trainer?
It works with a suitable three-phase supply and a load. The internal variable transformer and the load together set the fault current in each of the four circuits.
How can students tell when a fuse has blown?
Circuit two has a fuse-break detector with lamps, one for each of the three phase fuses, so students see exactly when each fuse breaks and can relate breaking time to fault current.
Who supplies the Circuit Breaker Trainer?
The trainer is offered by Science Lab Supplies from Ambala, India; a quotation can cover it alone or together with relays, load banks and other switchgear teaching equipment.
What does the key switch circuit demonstrate?
Circuit three has remote and local key switches, showing how a control room operator or a remote operator can switch a circuit on or off in a real installation.
Related Protection and Load Equipment
These Electrical Power System and Electrical and Electronics items round out protection teaching: relays and a relay test set, busbar and distribution trainers that place protection devices in a network, and resistive and power factor load banks, all of which can share one quotation.
- Overcurrent And Earth Fault Relay — entry-level relay for transformer, line and distribution scheme protection.
- Protection Relay Test Set — configurable transformer with a star primary and multi-tapped secondary.
- Switched Busbar Module — open- and short-circuit fault switches, one with a digital timer.
- Distribution Trainer — ring main and radial circuits wired on the upper panel.
- Portable Resistive Load Bank — three electrically separate resistor banks for star or delta connection.
- Power Factor Load Bank — shows the principles of a static VAr compensator.
- Loading Rheostat 50KW 440V AC Three Phase — floor-mounted unit with nickel-chromium resistive elements.
Browse the full Electrical Power System range, the Electrical and Electronics range, or all engineering laboratory equipment.
Last updated: 22 October 2026
