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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.
What KVA rating is required for a transformer that must handle a maximum load current of 8 Amperes with a secondary voltage of 2 kv?
The load is the product of the load current and the secondary voltage. So, in this example, the load is 8 x 2000 = 16 000 volt amperes, or 16 kVA. This must not exceed the transformer's rated kVA.
What will be the amperes for a load of 40000W on a 3 phase service?
It's impossible to tell unless you know the supply voltage.
What is the full load current of 200kW 380V 3-phase generator with 0.8 lagging power factor?
304 Amperes
What is the current drawn when you have a single phased load of 200KW is supplied at 500v through an overhead line with a resistance of 0.1ohm per conductor?
If the voltage is 500 volts, and the power is 200 kilo-watts, then the current is 400 amperes. (Watts equals Volts time Amperes)The resistance of the conductor has nothing to do with this calculation, but that fact that the conductors are 0.1 ohms means that the voltage drop across each conductor is 40 volts. (Volts equals Amperes times Ohms) Since there are two conductors, the total voltage drop is 80 volts, and the voltage available to the load will be 420 volts.
How is total lighting load in amperes determined?
This is an answer that must be determined from the course material. There are several ways to do this.
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
What are examples of amperes?
1 amp, 5 amp depends on the load
What is kilo amperes?
The correct expression is 'kilovolt amperes' (kV.A), and it is a multiple the unit of measurement ('volt ampere') for the apparent power of a load in an a.c. circuit -i.e. the product of supply voltage and load current.
If two electrical loads are connected in parallel with each other and each load draws 6 amps what is the total current of the circuit?
12 Amperes is.
Formula for 7.5va convert into Amperes load comsumption?
Volt Amps conversion
How many amperes in kva?
It depends on the voltage and whether it is a single- or three-phase load.
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.
What KVA rating is required for a transformer that must handle a maximum load current of 8 Amperes with a secondary voltage of 2 kv?
The load is the product of the load current and the secondary voltage. So, in this example, the load is 8 x 2000 = 16 000 volt amperes, or 16 kVA. This must not exceed the transformer's rated kVA.
