Answer Posted / kumar
because ht motor starting current always high so that
motor connection should be star to delta for limiting the
starting current.the principle is that staring position
motor connection in star later it change to delta
| Is This Answer Correct ? | 19 Yes | 20 No |
Post New Answer View All Answers
I am about to write exam in RRB bangalore for the post of section engineer.please provide me with previous exam questions
What are the types of transformers according to the arrangement of iron cores?
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
it is possible to measurement of tension of slipring induction motor(SRIM)carbon brushes, any maesuring instruments are available in the markets.
how to calculate the formula of cable size if motor kw is given
What is the simplest formula to calculate the rotor diameter of a synchronous generator?
concept of busbar and load dispatching..?
how to calculate the distance relay faulty zone?pls explain?
what are the pecularity of shaver sockets ?
how we explain parallel paths armature winding?
Define sensitivity?
HOW WORK HEAT PLATE EXCHANGER
Why we use auxillary relay ? what is function of differential relay, directional o/c relay?
what is the role of energy meter in distribution system ?
hello friends this is krunal here.. i have applied for he officer train in hpcl electrical stream.. any one who have applied before for electrical stream please help me out.. post ur reply to my mail id: krunal_airforce@yahoo.com.. any tips, old questions for paper or any help will do.. plz help me.. your faithfully, Krunal Darji