How to calculate electrical Induction motor heating and
cooling time constant,11KV,2850,12P,SCIM
Answers were Sorted based on User's Feedback
Answer / kn afridi
Heating and cooling time constants are generally given by the motor manufacturer.
This is the time required by the motor to reach 63.2% of its steady state temperature T when run with full load.
Heating time constant (t) is given by the formula (1-1/e) T= (1-1/2.718) T= 0.632T
If the steady temperature T attained by the motor is 90 degree C (say) when started from cold condition, the heating time constant in minutes will be the time required by the motor to reach 57 degree C. This can be noted during the heat run test on the motor under rated condition.
Is This Answer Correct ? | 7 Yes | 2 No |
Answer / thabo
A motor with a time constant of 120 minutes is rated at 40 kW continuously .compute the half hour rating for the same temperature if it starts from room temperature every time.
Is This Answer Correct ? | 1 Yes | 0 No |
which power plant has high load factor?
lenz law application and define
how i decrease the neutral to ground voltage , thats i read 7v on my digital meter.i dont know about my earth pit.
if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer
what is stepping motor and where can use in electrical installation.
what perpos use cepacitors in motars,fans,lights,and LT panal
what is tower earthing and what for it is required
can we use trip light with bus coupler?
what is the meaning of number in (11, 31, 61,14, etc. CDG11, CDG31, CDG61, DDT32
What is the minimum distance between MV busbare (P to P & P to E) as per some standards
Can a transformer designed for a particular voltage and frequency rating be used for different set of mentioned ratings? Assume that the winding does not get burnt because of overheating at higher voltage. If yes, then under which constraint it is possible?
What is the full form of GSL wire