I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, I

I have an existing old MCCB. ABB Model SACE, the rating
are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800
amps at 45 deg C. I need a circuit breaker for my 3 phase
motors, 380 volts 60 hz. the supplier required the minimum
ampacity of the breaker to be 911 amps. can i use this
breaker with rating of Iu =1250 amps but Ith = 800amps
maximum?

Question Posted / dalton

0 Answers
2300 Views
Siemens, I also Faced
E-Mail Answers

No Answer is Posted For this Question
Be the First to Post Answer

Post New Answer

More Electrical Engineering Interview Questions

What is the difference between UPS and SMPS?

7 Answers Mukand, NightFox,

what is electricity

3 Answers APGenco,

how to calculate insulation level of transformer?

0 Answers

c. int m = 10; main() { int m = 20; {int m = 30;} printf("%d %d",m,::m); 1. 10 10 2. 10 20 3. 20 10 4. 20 30 5. 30 20 6. None

2 Answers

what happens if we give 1-ph supply for 3-ph Bridge rectifier...??

2 Answers Sanelec,

we have 400kv/6.6kv transformer ,it has total 9 taps on HV side with normal tap on tap no 5.when we took the ratio test we observed that ratio was decreasing from tap 1 to tap 5 and was found increasing from tap 5 to tap 9.What is the reason?if anyone have related document then please send me on the email id ankushbahale@gmail.com......plz plz

1 Answers

Transformer diagram mention each parts ?

0 Answers

How do you connect the capacitors on polyphase circuits?

10 Answers L&T, Transco,

what is the need of representing AC power in sinusoidal waveform? why not in square or rectangular etc...

8 Answers Lanco,

what is thyristor, how is it works

1 Answers

why potetial transformer primary ground?

1 Answers

How out of step protection relay works?

0 Answers APL,

For more Electrical Engineering Interview Questions Click Here