Electrical Engineering Guides

Power Systems

Transformer Protection and Transformer Fault

There are different kinds of transformers such as two winding or three winding electrical power transformers , auto transformer , regulating transformers, earthing transformers , rectifier transformers etc. Different transformers demand different schemes of transformer protection depending upon thei

By Electrical4u 03/26, 2024
Power Systems

Electrical Fault Calculation | Positive Negative Zero Sequence Impedance

Before applying proper electrical protection system , it is necessary to have through knowledge of the conditions of electrical power system during faults. The knowledge of electrical fault condition is required to deploy proper different protective relays in different locations of electrical power

By Electrical4u 03/26, 2024
Power Systems

Protection System in Power System

This portion of our website covers almost everything related to protection system in power system including standard lead and device numbers, mode of connections at terminal strips, color codes in multi-core cables, Dos and Don’ts in execution. It also covers principles of various power system prote

By Electrical4u 03/26, 2024
Power Systems

Backup Protection of Transformer | Over Current and Earth Fault

Over Current and Earth Fault Protection of Transformer Backup protection of electrical transformer is simple Over Current and Earth Fault protection are applied against external short circuit and excessive over loads. These over current and earth Fault relays may be of Inverse Definite Minimum Time

By Electrical4u 03/26, 2024
Power Systems

External and Internal Faults in Transformer

It is essential to protect high capacity transformers against external and internal electrical faults . External Faults in Power Transformer External Short Circuit of Power Transformer The short – circuit may occur in two or three phases of electrical power system . The level of fault current is alw

By Electrical4u 03/26, 2024
Power Systems

Stator Earth Fault Protection of Alternator

This is to be noted that, the star point or neutral point of stator winding of an alternator is grounded through an impedance to limit the ground fault current. Reduced ground fault current causes less damage to the stator core and winding during ground or earth fault. If the ground impedance is mad

By Electrical4u 03/26, 2024
Power Systems

Rotor Earth Fault Protection of Alternator or Generator

The rotor of an alternator is wound by field winding. Any single earth fault occurring on the field winding or in the exciter circuit is not a big problem for the machine. But if more than one earth fault occur, there may be a chance of short circuiting between the faulty points on the winding. This

By Electrical4u 03/26, 2024
Power Systems

Inter Turn Fault Protection of Stator Winding of Generator

Inter turn stator winding fault can easily be detected by stator differential protection or stator earth fault protection . Hence, it is not very essential to provide special protection scheme for inter turn faults occurred in stator winding. This type of faults is generated if the insulation betwee

By Electrical4u 03/26, 2024
Power Systems

Generator Protection

A generator is subjected to electrical stresses imposed on the insulation of the machine, mechanical forces acting on the various parts of the machine, and temperature rise. These are the main factors which make protection necessary for the generator or alternator . Even when properly used, a machin

By Electrical4u 03/26, 2024
Power Systems

Differential Protection of Generator or Alternator

Any internal fault inside the stator winding is cleared by mainly differential protection scheme of the generator or alternator. The differential protection is provided in the generator by using longitudinal differential relay . Generally instantaneous attracted armature type relays are used for thi

By Electrical4u 03/26, 2024
Power Systems

Protection of Capacitor Bank

Like other electrical equipments, shunt capacitor may also be subjected to internal and external electrical faults. Hence this equipment is also to be protected from internal and external faults. There are numbers of schemes available for protection of capacitor bank , but during applying any of the

By Electrical4u 03/26, 2024
Power Systems

Protection of Lines or Feeder

As the length of electrical power transmission line is generally long enough and it runs through open atmosphere, the probability of occurring fault in electrical power transmission line is much higher than that of electrical power transformers and alternators . That is why a transmission line requi

By Electrical4u 03/26, 2024

Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

All

Transformer Protection and Transformer Fault

Electrical Fault Calculation | Positive Negative Zero Sequence Impedance

Protection System in Power System

Backup Protection of Transformer | Over Current and Earth Fault

External and Internal Faults in Transformer

Stator Earth Fault Protection of Alternator

Rotor Earth Fault Protection of Alternator or Generator

Inter Turn Fault Protection of Stator Winding of Generator

Generator Protection

Differential Protection of Generator or Alternator

Protection of Capacitor Bank

Protection of Lines or Feeder

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