0
They are usually rated by their power factor. With 100 volts at 1 amp the load uses 100 watts maximum, in general it would be 100 watts times the power-factor.
For example a small induction motor might have a PF of 0.7.
AnswerIn practise, there are very few purely-inductive loads. Most are resistive-inductive, and rated according to their apparent power expressed in volt amperes. A purely-inductive load would be rated according to its reactive power, expressed in reactive volt amperes. No load is ever 'rated' according to its power factor.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
How can you find watts from kva?
a VA is basically equivalent to a watt for most purposes so a KVA being 1000 VA, a KVA is basically 1000 W.However, 1 KVA = 1KW only holds true for resistive loads. If an AC power supply is running a motor or other very inductive load, KVA can be significantly higher than the power being used by the motor.The theory and mathematics of inductive loads are too complex to describe here but knowledge of inductive loads on AC supplies is one of the fundamentals of electrical engineering
What will most likely cause arcing at a switch contact?
inductive loads, like motors
What types of loads have a leading power factor?
Capacitive loads have a leading power factor. Current leads voltage when there is capacitive reactance. (The opposite is inductive, which is lagging.)
How many watts 24v 2.9a?
24 x 2.9 x Power Factor. Power Factor equals 1 for a resistive load and decreases toward zero for various inductive loads.
How many amps equals 400 watts?
Watts = Amps x Volts x Power Factor. Power Factor = 1 for resistive loads and gets smaller for inductive loads like motors. Assuming home voltage of 120 Volts and a PF = 1 your answer is 400/120 = 3.33 amps.
What is ac1 and ac3 contactor?
AC-1This applies to all AC devices (Resistive loads) with a power factor of at least power factor of 0.95 AC-3This applies to AC Inductive loads. Like squirrel cage motors.
Which is better for generator testing resistive or inductive loads?
resistive loads are best for testing ..they dont introduce phase changes you may test ac devices almost the same as dc inductive loads bring in lots of other factors that give confusing results
How can you find watts from kva?
a VA is basically equivalent to a watt for most purposes so a KVA being 1000 VA, a KVA is basically 1000 W.However, 1 KVA = 1KW only holds true for resistive loads. If an AC power supply is running a motor or other very inductive load, KVA can be significantly higher than the power being used by the motor.The theory and mathematics of inductive loads are too complex to describe here but knowledge of inductive loads on AC supplies is one of the fundamentals of electrical engineering
Why most of the practical loads are inductive?
Most loads are actually resistive, such as an incandescent (normal) light bulb or electric heat or cooking equipment. Other loads are mostly inductive because they incorporate either transformers or motors, which are both inductive. Off hand I cannot think of a normally capacitive circuit, which would be the opposite of inductive.
What is non inductive load?
non- inductive load is without motor and transformer loads are non-inductive load, purely resistive are capacitive loads phase angle is unity are leading PF A non-inductive load is a load whose current does not change instantaneously.
What is non-inductive load?
non- inductive load is without motor and transformer loads are non-inductive load, purely resistive are capacitive loads phase angle is unity are leading PF A non-inductive load is a load whose current does not change instantaneously.
What will happen when diesel genertor set run on more inductive load?
There is no problem using a generator to run more inductive load so long as the generator capacity can supply the needed power to the inductive loads. The inductive loads should not be switched on at the same time but there should be a little delay before another load is switched ON as inductive loads draw more power at start ON. The power factor of the inductive loads also affect the generator, hence for safe operation a power factor that is approaching 1 is desirable. Ogu Reginald Ekene
Is AC increased as frequency is increased?
It depends on the nature of the load.For inductive loads, the current will fall, because inductive reactance is directly-proportional to frequency.For capacitive loads, the current will increase, because capacitive reactance is inversely-proportional to current.For resistive loads, there will be very little change in current unless the frequency is changed substantially. This is because, at higher frequencies, the 'a.c. resistance', due to the 'skin effect', will increase.
Why natural trend to lagging power factor?
Power factor is the cosine of an AC circuit's phase angle, where the expression phase angle is the angle by which a load current lags or leads the supply voltage.Lagging phase angles and power factors occur in resistive-inductive circuits. Leading phase angles and power factors occur in resistive-capacitive circuits.Most industrial and commercial loads are combinations of heating (resistive) loads and motor (inductive) loads -in other words, resistive-inductive loads. Accordingly, lagging power factors tend to be more common than leading power factors.
What is the difference between an inductive and a capacitive load?
Resistance load it means there is passive load to impede current flow. Inductive load means there is a coil as a load while still a passive it has its own characteristics which differs from a resistive load which is linear while inductive is not linear load
What are common causes of transient voltage?
Sudden starting of large inductive loads..
What type of signal is produced by an inductive generator?
AC sinewave
