We have 800KW motor operating at 6600Volt,50 Hz supply.During 1st startup it tripped on overcurrent trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad was set on .94 initially.then we set at 0.97 and then it started fine.i dont understand why it tripped first?What are the protections which comes in picture during starting ?

6 Answers  

---

oil sample dielectric test gives the insulation rupture voltage at 26 kv. is this transformer safe to be operated . The working voltage is 11 kv

2 Answers  

---

why return path in terms of neutral is required please give a relevant answer

3 Answers  

---

What are the classifications of heating element?

0 Answers   BARC,

---

What is Surge Capacitor? Why it is require in Generator Circuit Breaker,inspite of surge arrester?

0 Answers  

---

can HT cable or HT bare conductor used for LT line? is yes what would be the current rating?

2 Answers   ACC, wbsedcl,

---

what happend if the protection ct is by mistake put instead of measuring ct & vice versa?

2 Answers  

---

how much earthings are provided for 22KV HT Metering Kiosk

1 Answers   GE, Gionee, Knight Frank, TATA, Vacmet,

---

can we make a loop between neutral and body for grounding?

2 Answers  

---

What is the HVDC Transmission System? What are the conditions applicable to lay an HVDC Line?

0 Answers  

---

3phase cable calculation formula by motor load

0 Answers  

---

How can we connect additional batteries to three phase ups? What are parameters we have to check when connecting?

0 Answers  

---