Mention The major features of a good protective gear for alternator and transformer

Major features of a good protective gear

ü  High speedy

ü  Selectivity

ü  High sensitivity

ü  Stability

ü  Simplicity

ü  Reliability

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Write down the Protective System of Alternator and Transformer

Alternator protection

ü  Differential protection system

ü  Balanced Earth fault protection

ü  Stator-inter run protection

Transformer protection

ü  Using Buchholz relay

ü  Combined leakage and overload protection

ü  Circulating-current scheme for transformer protection

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Write down some major Faults of Alternator and Transformer.

Major faults in Alternator

• ü  Failure of prime-mover
• ü  Failure of field
• ü  Over Current
• ü  Over Voltage
• ü  Over Speed
• ü  Stator Winding faults
• ü  Unbalanced loading

Major faults in Transformer

ü  Open circuits

ü  Over heating

ü  Earth Fault

ü  Phase-to-Phase fault

ü  Over Load

ü  Phase to ground fault

ü  Incipient fault

ü  High voltage surge fault

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How can a circuit element absorb power?

By converting electrical energy into-

• Heat (resistors in toasters); 

• Light (light bulbs); 

• Acoustic energy (speakers); 

• Storing energy (charging a battery).

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EEE Project -1 : 15- Step Digital Power Supply

Its is a simple circuit to obtain variable DC voltage from 1.25V to 15.19V in reasonably small
steps.

Download Instruction:
1. Click on the 'Download Now' button
2. Wait for five seconds and then click on 

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