WHY HOLDING CONTACTOR OF MOTOR STARTER IS CALLED NO VOLT
COIL.
Answer Posted / sreekar
since if no volt is avialble for coil operation, it
isolates the motor from supply.
like that it protect motor from start on load when supply
resumes.
| Is This Answer Correct ? | 4 Yes | 6 No |
Post New Answer View All Answers
Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere
What is the necessary condition for stability.
why steady state stability limit is greater than transient stability limit ? How it can be explained ?
how does the rotating m.m.f is produced in the 3-phase induction motor and how the poles are created in 3-phase induction motor ?
Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage
Suppose a 3 phase, 2 pole, 440V induction motor is driving a flywheel of 600mm diameter, 150kg mass. By using v-belt and pulley, the speed is increased to 4500 RPM. What will be the effect on motor current?
what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.
We have received supplies of the ordered material. payments against the supplies also released. Where ST paid 4% against form C. Meanwhile it has been observed that 25% of material supplied was defective. Please suggest whether the issuance of C form from our side would be stopped till settlement of liabilities.
can we find the inductance of a induction motor?
WHat is the general checks required for Dry type transformers
what is reactive power?, why its measured in VA ? is it transient behavior of system?
actually i can't understand what is 3dB ? and it's really not clear to me.please any one let it me be cleared.
what is the function of statics switch in ups and tell me parts
what about SAP/MRP regarding manufacturing of electric motors and all drives?
If any HVDC line is going with positive & negative(the negative usually have return path of current with earthing electrode). Now the question is if this HVDC earthed electrode which is using as return path and earthed any nearby 400kv or 220kv AC substation equipments. which will be the impact of this on AC substation & its equipment, how severe may be this and what should be the minimum distance require between HVDC earthed electrode and AC substation equipments? It's really an high engineering level question...Dare to answer and increase your knowledge.