Introduction to Protective Devices in Electrical Networks

1.

Introduction to
P rotective Devices in
E lectrical Networks
The presentation was made by Marat
Churilov and Nikita Nigmadzhanov. AEO541 Group.

2.

Presentation plan
• Types of protective Devices and examples.
• Protection against Overloads and short circuits. Examples.
• Leakage Current Protection. Examples.
• The Role Of Protective Devices.
• Importance of Proper Selection and Installation.

3.

Protection against Overloads and
Short Circuits
1
Overloads
When the permissible load is exceeded, the current increases, which can
lead to overheating and equipment damage.
2
Short Circuits
Sudden insulation failure can cause a short circuit, which can result in fires
and system damage.
3
Current leakage
is the flow of current through a path not intended for this purpose. In this
case, the leakage circuit may be the appliance casing, heating pipes, etc., or
a person may become part of the circuit.

4.

Types of Protective Devices : Fus es ,
Circuit Breakers
Fuses: Typically cylindrical in shape with a visible conductor that warns of overloads.
Circuit Breakers: Box-like and reliable, with the ability to automatically trip during overloads and short
circuits.

5.

Examples of Protective
Devices
Differential Circuit B reakers: automatic breakers with protection
against leakage currents and overloads.
RCD (R esidual Current Devices): provide protection against electric
shock.
Relay Protection Automation (RPA): designed to protect electrical
networks from short circuits and overloads.
Leakage Current Protection: Leakage current protection is an
important means of ensuring the safety of electrical networks.
Devices such as residual current devices (RCDs) and residual
current circuit breakers (RCCBs) provide protection against leakage
current, preventing hazardous situations.

6.

E x amples of Overload and Short Circuit
Protection Devices
Automatic Circuit Breaker with Digital
Dis play
Differential Relay for Overload P rotection
Modern automatic circuit breakers provide precise
against overloads with exquisite design and clear
protection against overloads and short circuits. They
modern indication.
are illuminated with bright white light and have an
elegant design.
Industrial differential relays offer perfect protection

7.

Examples of Leakage Current Protection
Devices
Differential Automatic Circuit Breaker
(DACB)
Leakage Current Protection Device (LCPD)
The DACB instantly cuts off the power supply when
current leakage to ground is detected, preventing
an imbalance in current is detected, protecting
electrical hazards.
against electric shock.
The LCPD immediately interrupts the circuit when a

8.

The Role of Protective
Devices in E ns uring the
Safety of E lectrical
Networks
Protective devices play an important role in ensuring the safety of
electrical networks by preventing potential accidents. They provide
protection against overloads, short circuits, and leakage current, thereby
enhancing the reliability and safety of power grids.

9.

The Importance of Proper
Selection and Ins tallation of
Protective Devices
Prevention of Accidents
Ris k Minimization
Properly selected and installed
They help minimize the risks of
protective devices prevent accidents
electrical injuries and fires in homes
in electrical networks.
and workplaces.
E quipment Protection
Proper installation of protective devices protects equipment from damage and
malfunctions.

10.

Thank you for your attention!