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How is the total load in volt-amperes for lighting purpose determined?
LxW of building x 3 volt amps per sq. foot
How is the total load in volt amperes for lighting purpose determined?
LxW of building x 3 volt amps per sq. foot
How is the load in volt amperes for lighting purposes determined?
LxW of building x 3 volt amps per sq. foot
If the 60 volts and the resistance of the load is 10 ohms the current is how many amperes?
6 amperes
How do you calculate lighting lpoad?
To calculate lighting load, you need to determine the total wattage of all the lights in the space. This is usually done by adding up the wattage of each light fixture or bulb. You can then convert this total wattage to kilowatts by dividing by 1000. Finally, multiply the total kilowatts by the number of hours the lights are on each day to calculate the daily lighting load in kilowatt-hours.
What are examples of amperes?
1 amp, 5 amp depends on the load
How the capacity of fuse is determined?
The capacity of a fuse is determined based on the expected current flow in the circuit. This is usually set slightly above the normal operating current to allow for surges without blowing the fuse unnecessarily. The capacity is typically indicated in amperes on the fuse itself.
Formula for 7.5va convert into Amperes load comsumption?
To convert 7.5 VA to amperes, you can use the formula: Amperes = VA / Volts. For example, if the voltage is 120V (typical for household circuits), then 7.5 VA / 120V = 0.0625 amperes.
Transformers are rated in what?
Transformers are rated in KVA. (this is because the transformer is Unity power factor device i.e.. PF = 1)AnswerThe selection of a transformer is determined by the apparent power of the load, expressed in volt amperes(V.A), the load current, and the line voltage of the supply. The transformer must be able to satisfy these requirements.Transformers are not 'unity power factor' devices, which is precisely why their capacity is expressed in volt amperes, rather than in watts.
How many amperes in kva?
It depends on the voltage and whether it is a single- or three-phase load.
Why capacitor can be defined in kvar?
Capacitors designed to be used for power-factor correction are rated in reactive volt amperes, rather than in farads.The reason for this is that in order to determine the necessary correction, a load's existing reactive volt amperes is first calculated, then the reactive volt amperes of the capacitor must be determined in order to achieve the required value of power factor. In other words, the capacitance (in farads) of the capacitor is irrelevant to the calculation.
Why use of capacitors to correct pf?
Power-factor improvement capacitors are connected in parallel with the load, and are rated in reactive volt amperes. If their reactive volt amperes are identical with the reactive volt amperes of the reactive component of the load, then they act to cancel each other, and bring the phase angle to zero (i.e. the load current becomes in phase with the supply voltage). This reduces the value of the load current without affecting the operation of the load, and allows cables and switchgear with lower current ratings to be used than would otherwise be necessary.
