Electrical Engineering Guides

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
Power Systems

Overvoltage Protection

There are always a chance of suffering an electrical power system from abnormal over voltages. These abnormal over voltages may be caused due to various reason such as, sudden interruption of heavy load, lightening impulses, switching impulses etc. These over voltage stresses may damage insulation o

By Electrical4u 03/26, 2024
Power Systems

Busbar Protection | Busbar Differential Protection Scheme

In early days only conventional over current relays were used for busbar protection . But it is desired that fault in any feeder or transformer connected to the busbar should not disturb busbar system. In viewing of this time setting of busbar protection relays are made lengthy. So when faults occur

By Electrical4u 03/26, 2024
Power Systems

Motor Protection Circuit Breaker or MPCB

Motor protection circuit breakers are a specialized type of electrical protection device that is designed specifically for electric motors, like their name implies. Electric motors have plenty of applications and are used to drive mechanical devices of all types, so it is very important to protect t

By Electrical4u 03/26, 2024
Power Systems

Annunciation System Alarm Annunciator

In electrical and electronics systems, the word Annunciator means a device which announces the faults or unusual activities coming from the system or process associated with it. What is Alarm Annunciator? It is basically an audio visual warning system, which highlights the fault or mishap which is g

By Electrical4u 03/26, 2024
Power Systems

Loss of Field or Excitation Protection of Alternator or Generator

Loss of field or excitation can be caused in the generator due to excitation failure. In larger sized generator, energy for excitation is often taken from a separate auxiliary source or from a separately driven DC generator . The failure of auxiliary supply or failure of driving motor can also cause

By Electrical4u 03/26, 2024
Power Systems

Motor Protection: Types, Faults and Devices

A motor protection system is a set of devices and methods that protect an electric motor from various faults and damages. An electric motor is a crucial component of many industrial and domestic applications, ranging from small appliances to large machines. Therefore, it is important to ensure the p

By Electrical4u 03/26, 2024

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

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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

Overvoltage Protection

Busbar Protection | Busbar Differential Protection Scheme

Motor Protection Circuit Breaker or MPCB

Annunciation System Alarm Annunciator

Loss of Field or Excitation Protection of Alternator or Generator

Motor Protection: Types, Faults and Devices

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