Answer / raj

relay are device which are use to sense fault .
and cntactor are device which reacived signal through relay
and remove contact from the line or connect the line
(manually)

Answer / sahilnabi

Relay is basically an electronic device which manufact because of sensing very small parameters of electricity.

In connectivity of the same contactor is made for basically for manual as well as automatic switching operation for secure the machine from several surges.

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

0 Answers  

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How to calculate HT XLPE CABLE for 11 kv / 433 v , 1500 kva oil type transformer system? plz provide step by step calculation

15 Answers   Engineers India, Indian Railways, Polycab, Shashwat, Sitara Energy, Sonali Bank,

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If the secondary winding will be open in current transformer, how to damage the insulators

2 Answers   TPDDL,

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what is LSR?

0 Answers  

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why in transformer there is not rotating fiddl/ magnetic field like motor

4 Answers  

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what is the advantages of having in-built acvvvf (without seperate inverter in the control panel)in the drive system of elevators?

0 Answers  

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What are the test involved in DG auto synchronizing panel before in manufacturing place before dispatch.

2 Answers   L&T, TCS,

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10Hp, 3-phase, 415v, 50Hz induction motor. The above motor is to run on Star-Delta connection, so how do i make following hardware selection 1) MCB, 2) Contactor, 3) Wire Gage (Depending on P-P current or Line Current), 4) OLR, Please tell in detail how to do the above, so as to get the ans. of it even if the Hp rating changes.

1 Answers   Engro,

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what happend if we remove dc exciter from moving machine..: gg

4 Answers  

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Transmission lines usually use a.3 phase b.2 phase c. Single phase

1 Answers   K Tech Electrical,

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What is the meaning of coupling and decoupling in the context of power flow?

5 Answers  

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Hi, what is 100 % stator earth fault protection and how it can be achieve by 3rd harmonics and low frequency injection principle ?

1 Answers  

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