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.

Please brief working principle & construction of permanent magnet AC Servo motor

0 Answers   DRJ ARDE,

---

in what type of applications v can use q meter?

0 Answers  

---

why they were using TRIAC instead relay in some controllers and what is the advantages.

0 Answers  

---

What are the types of instrument transformer?

0 Answers  

---

capacitor is load free component but why ampare meter shows current when capacitor bank breaker close?

5 Answers   Bhel, OPS,

---

What is the effect on Power factor and capacitor when your company load is more than 70 % of welding transformer

0 Answers  

---

hi frnds what is meant by harmonics & what is meant by third hormonics,where its will occur ?thank u

0 Answers  

---

how is the cable tray designed & how its total length is calculated for an Industrial plant Say for Ex. (500KW Motor Load)

0 Answers  

---

how to identify the failer of igbt

0 Answers  

---

where the lexical paramater will use in fron end?

0 Answers  

---

how to calculate cable size by amp

19 Answers   CDS,

---

why the energy meter disc rotates anticlockwise while reading

1 Answers   KSEB,

---