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.

what is v/f control in VFD?

0 Answers  

---

A three phase load, around 4 km away from the 11/0.433KV distribution transformer (Neutral of Transformer is solidily earthed) and consisting of mainly very costly and sensitive electronic equipments is giving trouble due to high voltage difference between neutral and body earth. Whether this problem can addressed by connecting neutral at the load point solidly to earth?

3 Answers  

---

importance of reactive power management

0 Answers  

---

can i use 2000/5A Clamp meter to measure HT cable

0 Answers   century, Engro,

---

what is frequency response?

0 Answers  

---

Why generator is not connecting in delta ..why connecting in star ?

4 Answers   Bhel, Foretec Engineers,

---

The neutarl to earth voltage in system is 7volts on Electricity power but it lowers to 1.3volts when load transfered to DG power.what may be the reason.

3 Answers  

---

What is the technical name of minute currents that i have been produced in moving electrical objects?

2 Answers   ITC Infotech,

---

what is inrush curent.

5 Answers   BARC,

---

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  

---

What is the current flow in 230v ac supply ? What is the current flow in 415v Ac supply ?

6 Answers  

---

Give the topology of current amplifier with current shunt feedback?

0 Answers  

---