Answer / matt

Let through energy is the amount of energy that will be let though in a short circuit condition. The let through energy (I^2t) is calculated from the fault clearing time and the trip multiplier, which is obtained from the MCCB manufacturer. Let through energy is useful in sizing downstream cables.

Answer / rohit

Let through energy of MCCB or Fuse is the energy required
for the operation of magnetic coil (in case of MCCB) or
fusing the metallic wire of fuse.
this shall be as small as possible for the protection of
downstream electrical equipment such as cables, motors etc.

during the period of armature reaction ,if the brush shift is not accomplish, what happen?

1 Answers  

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hi, in the event earth grounding is not available in a project, is there any other way to make the elcb work? fyi, i have an instant water heater (6.5kw) installed, however if there is grounding in the heating element inside the heater assembly, i will get grounded. thank you in advance to those who will answer my question.

0 Answers  

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What is the control action?

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what is meant by VDC ?where its applicable ?

2 Answers  

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AC current is flowing in a wire in your home how can you measure it(name of the instrument)

24 Answers   NTPC, TCS,

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Wat is the best to use in a generator a 6.5kva or a 7 kw

4 Answers  

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what is the distance maintained between the power and data cables with respect to the KVA .... plss give me the formula

1 Answers  

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The slip during plugging operation is given by= A 1-s B 2+s C 1+s D 2-s

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In case of 3 phase motor why it is called single phasing by failure of one phare unless there is rest two phase are acting. ?

3 Answers  

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what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.

0 Answers   NTPC,

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why don't we use the generator as a motor? and what will happen?

0 Answers  

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define B types and C types in MCB ?

3 Answers   Bhel,

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