sir, my question is that if we start any three phase induction motor with star connection.will be current taken ? please send a formula.
ABB,
4 9074i have a roll dia aprox.43 inches and gear box ratio is 14.3.so my question is how was decide the kw rating of motor.
1 2401Which UPS (inverter) is better and why ? 12 V inverter and 24 V (two 12 V batteries in series) inverter which is better ......... which has the longer backup which has the greater charging time which has the greater discharging time thank you
2 3277why dont we connect the two 12 V DC batteries in parallel, for an inverter (UPS)? is there any harm ?
3 49651 Ton = ? amperes & power. How much power 1.5 TON split AC consumes in an hour at 17 C , 26 C & 28 C (thermostat' temperature).
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18 439031how to determine the cable size...pls explain me with the formula taking particular load....does the factors like impedance & short circuit rating influence the cable size, if so how....
1577When capacitor bank connect on line. It's draw some current but it's current not increase of main line ammeter. Why?
1 5279Post New Electrical Engineering Questions
How to calculate approximate load loss of a distribution transformer by knowing %ge imp of transformer?
what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY
State the points to be considered for selecting a particular type wiring.
in a silicon diode we can measure .7v in a voltmeter.but why we can't use this voltage for using?
ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?
In vapour absorption refrigeration machine fluids used are
what is the importance of Partial Dischage test for Electrical Equipments
I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??
Define active and passive network?
what is the major difference between LIBBP & HIBBP.. which one is most preferable..
What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?
The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?
why h parameter are called as hybrid parameter?
why should small green grass ans small plant should not be there inside the transformer Yard in the factories
why 1.7Uo for HV cable Hi pot test?IE standard why?
