Normally the
starter used to
reduce the
starting
current.but the
dol starter do not
it,so why we use
it?
Answer Posted / ali
i have seen many dol motors r just running on mcb without
creating any porblem for last 4-5 years dol startor are
soft stator which is manually operated suppose in an
industry to cut metals having hacksaw machine(dol motor)
which is merely operating on mcb suppose machine in ON
suddenly there is a breakdown in electrical supply & will
resume after 2 hour & operator will assume 2 hour is
sufficient time to clean the machine & these is a good time
lets take full advatage of it & he started to cleaning the
machine & forget to OFF the mcb he is cleaning & removing
burs from blade teeth suddenly suply resume 1 hour before
than the mentioned time what will happen??????????
| Is This Answer Correct ? | 1 Yes | 2 No |
Post New Answer View All Answers
What OPGW is better than Microwave or PLCC???
tell me some type of questions throught which i can prepare for exam and do my best
How do apply electrical 'c'license......pls advice
what is the Pickup/drop off ratio in BCPU relays
can you plz send l&t aptitude questions if available its urgent plz plz plz
What is the general power factor & min. power rating of TV,LCD type TV, CRt type TV, Scanner, printer?
What is CCT (Correlated Color Temperature) ?
What is knee point voltage?
why only exciting current is shown not primary current in transformer???
How many VSC based HVDC are there in India and the world
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
How generating electric power export to grid from the generating station ?
explain the what is a drive ? 0 4 which type motor r use in the celling fan..... PCB plannet 2 13 If stator & rotor of a 3-phase induction motor have different no. of poles, will the motor run or not?? types of drives Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only. ACC 1 41 how the 3phase induction motor is running in 2phase supply with help of capacitor? 1 33 what is the actual difference betwen constructional details and constructional features? 1 20 how does commutator convert a.c to d.c?
Why arc quenching is used in Diode ?
please send me RRB electrical engineer previous year questions for Sr. Section Engineer