if a 3phase motor runnig in star delta starter with full load of its,and its r

if a 3phase motor runnig in star delta starter with full
load of its,and its rated 15 amps.now we conneted over load
thermal relay at its main contactor,here what will be our
amps sittings?

Question Posted / guest

3 Answers
4897 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

if a 3phase motor runnig in star delta starter with full load of its,and its rated 15 amps.now we ..

Answer / pillay

If star delta connection it will have 6 wires . so the amp setting of the TOR WILL BE FULLLOAD AMPS /ROOT 3
15/1.732 =8.6 AMPS

Is This Answer Correct ?

6 Yes

2 No

if a 3phase motor runnig in star delta starter with full load of its,and its rated 15 amps.now we ..

Answer / tp

15 amp

Is This Answer Correct ?

2 Yes

5 No

if a 3phase motor runnig in star delta starter with full load of its,and its rated 15 amps.now we ..

Answer / k.prakashchandra

The thermal relay is coeected to mains and not after the
starter.The setting may be at 110 to 120 % 0f full
load.i.e.16 to 18 A

Is This Answer Correct ?

1 Yes

4 No

Post New Answer

More Electrical Engineering Interview Questions

What are the application of filter?

0 Answers

how to calculate generator capacity?(kva)

2 Answers SMEC,

For Eg a 30 kw motor at full load how much kw it takes And at no load how much KW it will take?

1 Answers GEPL,

New istallation how many eathing have one transformer? Names of earthing connect places?

10 Answers

how to select rating of HT Panel

0 Answers

why three phase three wire system probably did'nt have neutral

2 Answers Marico,

which model T or pie model is prefarable in power syatem

0 Answers

what is derating?, why it is neccesary, it is same for all means for drives, motors,and cables.

1 Answers

what is the difference between analog and digital signal?

3 Answers

I hv a question regarding power factor improvement just after transformer. I request you to reply me plzz. thank you sir. My friend has a small unit of fabrication. in his factory the main load is a welding machine, lathe machine, grinding machine. this load is not continuous type. now our electricity board has installed 16 KVA, 11000/433 V transformer for our factory. In the energy meter (trivector meter) at LV side of transformer, i hv seen power factor value of 0.15 only when only 3 KW load was flowing. Further electricity board has suggested to install 4 KVAR capacitor at LV side after energy meter. Now my question is that if we permanantly install and switch on 4 KVAR capacitor after energy meter, during some load on transformer and also without any load on transformer, wht will be the power factor shown in energy meter?i dont want to get any penalty by electricity board, so plz suggest me if i can permanantly install and switch on the 4 kvar capacitor or not at LV side of transformer just after energy meter? Thank you again and awaiting for ur positive reply soon.

9 Answers

what type of battery used for starting D.G?state its function?

2 Answers

Can earth resistance be measured without connecting the earth electrode? and should earthing connections be disconnected What is the effect of connecting two cables of different sizes in parallel with supply? Thanks in Advance. I am intrested to get in touch with some tecnocrats/engineers,my mail i.d is : hiremathvijay@rediffmail.com

1 Answers

For more Electrical Engineering Interview Questions Click Here