Posts Tagged ‘protection devices’

Coordination of Protections in a Power System

February 1st, 2019 | Make a comment | Posted in Electrical Safety
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The coordination of protections is a study of the interfaces between the protection scheme and the system overcurrent, considering an operation sequence between the different existing protection devices, in order to guarantee the selectivity of the system.


distribution circuits protection and coordination



Also, coordination of protections is commonly used in medium voltage distribution networks and low voltage systems due to the nature of the network itself. Read Electrical Engineer Nico’s writing about the topic below…


Importance of numerical protection relay

December 19th, 2013 | 2 Comments | Posted in Electrical distribution
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Importance of numerical protection relay 1

Protection devices are important part of the electrical supply system. They have evolved from simple microprocessors in 1985 to the advanced numerical relays of the current era. Numerical relays are a focal point of interest on the account that they can be programmed.

Protection devices that use numerical protection relays are advantageous on the account that they provide better protection, reliability, troubleshooting and fault information.

Function of Relay

Over the period of time, electrical engineering has evolved from static studies to dynamic ones. Now there are advancements such as digital signal processor and computational hardware which improves the efficiency of numeral relays in protection of devices.

The current power system protection devices present the user with integrated functions. Numeric power system protection devices can multitask on attributes such as protection, control, monitoring and measuring. In addition to this, the communication capability of such relays provides remote control as well as real time data transfer.

Now the conventional system of electromechanical and static relays is usually restricted to the single function protection strategy. This shows the tactical prowess of a numeral relay system.


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