Answer / yusuf.mavin

When a large current flows through the primary of a current
transformer it is stepped down and a low current flows
throughs the secondary of the c.t. however when there are
faulty currents flowing the secondary cannot bear hevy
currents so the core of the c.t gets saturated i.e. it does
not respond any further to higher currents. All the
electrons of the core are alligned and there are no more
electrons to works further this phenomenon is called
saturation. This can be avoided by applying multiple cores
to the c.t. which act as protective cores and prevent the
main secondary from burning.

The potential difference between a phase and neutral is 230v , but the potential difference between two phases is 400v. why?

4 Answers   HCL,

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hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?

0 Answers  

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if HT side voltage is high current is low . and LT side voltage is low current is high please explian.

5 Answers   HP,

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I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)

0 Answers  

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what will be the effect of leading power factor on turbogenerator (and system) that is running parallel with other TG.

1 Answers  

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The ohm is the unit of:(a) Charge(b) Resistance(c) Power(d) Current

2 Answers  

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1. Synchronization is not required A. Thermal B.Hydel C.Wind D.Nuclear

2 Answers   APGenco, Birla Power,

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in 132 kv substation ligtning arrestor(120 kv) connected to line. but line voltage comes to 132 kv, it operate or not???

4 Answers   Divis Laboratories,

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We have 90mX100m hangar with 16 no.of supporting pillar. It is required to provide power supply on all pillars. what is suggested earthing scheme for hangars.

0 Answers   HAL,

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why active power is called as real power or working component.What is the exact function of active, reactive & apperent power.

3 Answers  

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My switchgear busbar is rated at 2000A and just imagine the actual load on busbar is 1000A. From that busbar there are 10 outgoing feeders. Now the question is will the load be 1000A on each outgoing feeder or 100A per outgoing feeder. 2nd thing how do i calculate the load on individual feeder. Thanks for your time. Please provide some clarification on this issue.

1 Answers   Alstom,

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Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

0 Answers  

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