what is the working principle of ceiling fan and table fan?
Answer Posted / poo zhey
ceiling fan works by the principle of induction. i.e. when
ac supply is given to a coil, rotating magnetic flux is
produced which is induces voltage in the rotor and develops
torque. thus it rotates
| Is This Answer Correct ? | 33 Yes | 4 No |
Post New Answer View All Answers
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<
Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?
If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines
why the projects getting loss?
how does an centrifugal and screw type chiller will work. which chiller efficiency is high and why.
State uses of different types of stsrters with different capacities of motors as below: a. up to 5HP b. above 5hp to 10hp c. above 10hp to 20hp d. above 20hp
why core is useful for a transformer ?and also in its operation ?
Why air circuit breaker off due to power failure?
1 hp is equal to how much watt?
why are installed water leakage detection system data centers & server rooms
While converting delta into star or star into delta ,the three values of resistances remains unchanged .Find out the value?Let In star R1=x;r2=x;R3=x On converting into delta,R12=x;R23=x;R31=x Find the value of x
Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core
we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards
regarding safety what would u consider the most important rules to observe when inspecting electrical equipment?
how to calculate power consumption in slip ring motor at different step