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?
Answers were Sorted based on User's Feedback
Answer / biswajit sahoo
IT DEPENDS TYPE OF LOAD IT VARRIES FROM 20 S TO 80 SEC
Is This Answer Correct ? | 6 Yes | 1 No |
Answer / 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 |
what is the disaddvantages of high power factor
what shoud be strength and weakness to impress interviewer????????
how encoder works?
plz explain the auot-reclosing circuit in electrical engineeing
What is required of exietation to the alternater.
Lt trivector meter with ring type CT.Spec of meter are 3x240 v, -/5A. Ring ct spec. are 60/5A, line voltage- IL .66/3.0KV..what is the multiplying factor
how to calculate EXCITATION VOLTAGE & CURRENT in ALTERNATOR
What does the term power factor shows?
How to megger test 11 kV cable and the acceptance IR value
HOW TO TEST THE SODIUM VAPOR AND MERCURY VAPOR LAMP ?
in 400 kv system why should trip both side CB when we give hand trip?
What will be the resultant out put voltage when two different voltage rating batteries are vconnected in parallel? pls. answer with example if available.