ETO

WHAT IS HIGH VOLTAGE: The International Electro technical Commission describe high voltage as above (>)1000 V for alternating current(AC), & at least 1500 V for direct current(DC) & differentiate it from low voltage (50–1000 V AC or 120–1500 V...

A circuit breaker in which the current carrying contacts work in the sulphur hexafluoride or SF6 gas is known as an SF6 circuit breaker. SF6 has magnificent insulating property. SF6 has high electro-negativity. That means it has...

SYNCHRONIZING AND PARALLELING OPERATION OF ALTERNATORS Main generator units(steam turbine, diesel driven & shaft driven) have to be run in parallel to share a total load that surpass the capacity of a single machine specially when discharging cargo, loading...

1. Alternator shows no voltage Causes: Exciter field resistance is too high or there is a loss of residual magnetism.Short-circuit in excitation circuit probably between leads to field or alternator slip rings.Insulation of windings is not proper.Fault in...

Megger is the most portable insulation tester. It is used to measure very high resistance of the order of Mega ohm. Types of Megger This can be separated into mainly two categories:- Electronic Type (Battery Operated) 2. Manual Type (Hand...

A capacitor is a two terminal electrical component used to store electrical energy temporarily in an electric field. The types of practical capacitors vary widely, but all contain at least two electrical conductors (plates)...

A circuit breaker is an automatic device which is designed to stop the flow of current in an electrical circuit and save the electrical circuit from damage caused by overload or short circuit. Its main...

A relay is an electromagnetic switch device which utilizes very small electric current that can turn on or off a much larger electric current. The heart of a relay is an electromagnet. A relay is...

A semiconductor is a type of material posses electrical conductivity between conductor and an insulator.They are neither good conductor nor good insulators. The electrical resistivity of semiconductor generally decreases strongly with increasing temperature.Semiconductor atoms...

Alternators used for parallel running are required to have a protective device which will release the breaker and prevent motoring if reversal of powering occurs. Such type of device would prevent damage to prime...