Laboratory Stand "Characteristics and Protection of Electrical Devices"

Technical Parameters:

Power supply: 220 V

Can be equipped with transport rollers for mobility

Functional Features

Bench Housing

Contains electrical equipment, electronic boards, a perforated front panel, and an integrated work surface.

Front Panel

Displays electrical diagrams with measuring instruments. Contains switching sockets, a digital measuring panel, a stopwatch, switching devices, a voltage regulator (VARIAC), and a fuse link holder with a magnifying glass for observing the blowing process.

Interchangeable Modules:

Module with relay-contactor equipment:

Magnetic starter type In-9A, Un-110V, 1NO contacts

Magnetic starter type In-25A, Un-220V, 1NO contacts

Intermediate relays type Umax-30 V AC / 250 V DC, Imax-5 A, Pmax-210 W, contact resistance-100 mOhm

Module with protective equipment:

Overcurrent relay 230 V AC, 16 A, range 0.5–5 A

Thermal relay, 1 A

Circuit breaker, 1 A

Overcurrent relay, 0.4…1 A

Module with electronic devices:

Thyristor voltage regulator with sockets for control signals and power circuits

Solid-state relay (SSR)

Equipment Inside the Bench Housing:

Power source +5 V (current 1 A)

Stopwatch with a measuring range of 0.01 – 99.99 s

Digital measuring device with a current relay

Power transformer 220/42 V

Resistor 50 W, 22 Ohm

Autotransformer (VARIAC) 0.4 kW

Rectifier for regulated VARIAC voltage

Power transformer

Controls:

Laboratory VARIAC switch

Potentiometer for RCD leakage current adjustment

Mode switches for the digital measuring device

Stopwatch reset button

Set of connecting wires

This comprehensive training platform allows for the study of the design, operation, and maintenance of common electrical apparatuses used in industrial and civil systems.

Bench Construction:

The housing contains electrical equipment components, electronic boards, a perforated front panel, and an integrated work surface.

The front panel features electrical power circuits with measuring instruments, allowing for a detailed analysis of each device's functionality.

Thanks to interchangeable modules, experiments can be flexibly conducted with different types of electrical equipment — relay-contactor groups, protective devices, and electronic units.

The panel is also equipped with sockets for circuit assembly, a digital indicator, a stopwatch, switching equipment, an adjustable voltage source (VARIAC), and a fuse holder.

Training Projects

Investigation of Fuses

Study of the design, operating principle, and maintenance of low-voltage fuses.

Obtaining the time-current characteristic by melting the insert and comparing it with the theoretical one.

Study of Contactors

Investigation of the operating principles and functioning of AC and DC contactors.

Testing an Electronic Current Relay

Study of the design and operating principle of an electronic current monitoring relay.

Experiments with Thermal Relays

Analysis of technical characteristics, design, and functioning of thermal relays.

Assembly of Electrical Circuits

Using connecting wires (jumpers) to assemble electrical circuits according to the diagrams provided in the manuals.

Educational Advantages

Hands-on Work Students interact with real components and assemble functional electrical diagrams.

Comprehensive Training The bench covers all key aspects of electrical apparatus: fuses, contactors, relays, and electronic devices.

Modular Design The ability to use interchangeable modules enhances the understanding of complex systems and provides flexibility in conducting experiments.

Safe Construction Equipped with protective devices and safety features, guaranteeing safe operation.

Conclusion

The training and laboratory stand "Characteristics and Protection of Electrical Devices" is modern educational equipment that combines real components and advanced simulation capabilities. Its robust frame, wide set of modules, and variety of functions make it an indispensable solution for teaching and learning modern electrical engineering technologies and the maintenance of electrical devices.