Interested to Buy Any Domain ? << Click Here >> for more details...
what time should we set to come on star contacter in
stardelta starter?and for what reason we hav to set such
time delay range?
- 2 Answers
- 5431 Views
- I also Faced
- E-Mail Answers
Answer Posted / srinivas
In star delta starter first star contactor will be in action after some delay time delta contactor will come in to picture and no need of time delay for star contactor.
At the time of starting motor ohmic resistance is zero and hence the back EMF zero. So it will takes more current, it may cause winding damage. So we have to reduce the starting currents. it is possible by connecting the motor terminals as star at the starting. Time delay range depends on what type of load used in motor and rating of motor. Normally the time delay range will set to reach above 70% of the motor load.
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
CBCT selection
why US countries maintains 110v and 60HZ
please explain how to do 'pole drop test' on generator?
What are the various types of BUSBAR Schemes? explain each
What is the magnetic field (coil DC ) of Turbo Expander?
If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?
What is the function of retrip in busbar?
Why are iron cores in transformers made laminated?
Q) Write VBscript code along with QTPscript code in QTP tool for below scenario 1. Launch yahoo site(i know) 2. Do loogin(i know) 3.Click inbox link(i know) 4.Go to every page of mail box and count no.of read mails and no.of unread mails(i know) 5.Store page numbers, read mail count and unread mail count in a new excel file sheet 6.Create 10 types of graphs on that data 7.Do logout and close site(i know) 8.Save new excel files with graph
Why MCCB is Getting tripped sometimes when there is no load in the Midnight ?
What is the difference between AC and DC injection methods for rotor earth fault protection
Determine the BTU size of an aircon for 20 sq metre room
what is the difference between gas group b and gas group c electrical equipment construction wise?
Usage of flywheel diode in relays
what is positive , negative & zero equivalent system resistance
