Answer / goutam ghosh

Busbar size for a rated current can be calculated from
CURRENT DENSITY. Current density for copper is 160
amps/sqcm.(1000 Amp/sqinch.)and for Aluminium the same is
130 Amp/sqcm.(800Amp/sqinch.).Say for 200 amps reated
current Aluminium busbar of cross section 30mm X 5mm or
Copper busbar having cross section 25mm X 5mm should be
used according to nearest availability at market.

Why let through energy not considered for ACB breaker while cable sizing?

0 Answers  

---

WHAT IS THE DIFFRENCE BETWEEN EARTHED AND UNEARTHED CABLE (XLPE)?

6 Answers   Essar,

---

why transformer rating in KVA or MVA instead of KW n MW??

3 Answers  

---

a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

0 Answers  

---

What is meant by term Back to back in HVDC transmission?

1 Answers   SSC,

---

why a tester wont shock while testing the power in house

0 Answers   Tessolve,

---

what will happen when a bulb s connected btwn two phases of a three phase delta connected source?

6 Answers  

---

What is Long rod insulator and it's applications..? merits over the disc insulator ..?

0 Answers  

---

Distinguish between Earth & Neutral?

5 Answers   Essar,

---

does frequency affects the load? if yes elaborate it.

1 Answers  

---

why we use primary delta connectin in hight voltage transformer

2 Answers  

---

what are the different types of bus bar used at electrical work at shelter

3 Answers   Aster Teleservices, Costco,

---