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KW = (sqrt 3) X Line voltage X Line current X Power factor
Line current is proportional to Line voltage for same KW load so if 220 motor is connected to 110 v the Line current will increase. see Example:
A 5 KW motor is connected to 220 V & then 110 v ( assume power factor is 0.850)
Current ( I with 220 v) = (5 X 1000) / (1.73 X 220 X 0.850) = 15.5 Amp
Current ( I with 110 v) = (5 X 1000) / (1.73 X 110 X 0.850) = 30.9 Amp
What else can I help you with?
Which would you use for a 250W appliance and why?
I would use a 300W power supply for a 250W appliance. It's recommended to have a power supply that can handle more than the actual wattage of the appliance to ensure efficient operation and prevent overloading. In this case, a 300W power supply would provide enough headroom to safely power the 250W appliance.
Can you have a 15 amp appliance on a 32 amp supply?
Yes, providing the phase is the same. but you can't do the other way around, or breaker will immediately pop, or fuse will blow.
Where is the power supply on an oven?
The power supply for an oven is typically located at the back of the appliance. It is usually connected to a dedicated outlet or circuit in the kitchen. It is important to ensure that the power supply is properly connected and grounded for safe operation of the oven.
What happens when power supply is overloaded?
When a power supply is overloaded, it can overheat and potentially fail. This can lead to damage to the connected devices, such as a short circuit or a power surge, which can result in data loss or hardware damage. It is important to ensure that the power supply is rated to handle the load requirements of all connected devices to prevent overloading.
Does a socket use energy when it is turned on but the appliance connected is turned off?
No, a socket does not consume energy when it is turned on but the appliance connected to it is turned off. Energy is only consumed when the appliance is actively using power.
What are the uses of wattmeter?
Wattmeter is an intrument which is used to measure the power consumption of an Electric circuit or an appliance which is connected to the supply in terms of Watts.
Which would you use for a 250W appliance and why?
I would use a 300W power supply for a 250W appliance. It's recommended to have a power supply that can handle more than the actual wattage of the appliance to ensure efficient operation and prevent overloading. In this case, a 300W power supply would provide enough headroom to safely power the 250W appliance.
Can you have a 15 amp appliance on a 32 amp supply?
Yes, providing the phase is the same. but you can't do the other way around, or breaker will immediately pop, or fuse will blow.
Where is the power supply on an oven?
The power supply for an oven is typically located at the back of the appliance. It is usually connected to a dedicated outlet or circuit in the kitchen. It is important to ensure that the power supply is properly connected and grounded for safe operation of the oven.
What happens when power supply is overloaded?
When a power supply is overloaded, it can overheat and potentially fail. This can lead to damage to the connected devices, such as a short circuit or a power surge, which can result in data loss or hardware damage. It is important to ensure that the power supply is rated to handle the load requirements of all connected devices to prevent overloading.
Can you run a three phase appliance on 240 volt power supply?
No. You need a 3-phase supply that matches the voltage and current rating of your appliance.
Does a socket use energy when it is turned on but the appliance connected is turned off?
No, a socket does not consume energy when it is turned on but the appliance connected to it is turned off. Energy is only consumed when the appliance is actively using power.
What is the expression of the power consumed by an electric appliance fed by a DC?
Power consumed by the appliance = (DC supply voltage) x (DC current)
How can you measure the ampere or watt for power supply?
You can measure the current and power of a 'power supply', using an ammeter and a wattmeter. With the power supply connected to its load, the ammeter must be connected in series with the power supply's input. The wattmeter's current coil must also be connected in series with the power supply's input, and its voltage coil must be connected in parallel with the supply, taking the instrument's polarity markings into account.
How is the power factor meter connected?
power factor meters are connected across the supply
What is the function of electrical socket?
Its function is to supply electrical power via a plug that is plugged into it to supply an appliance.
Is it safe to use 230 volts 50 hz appliances where power supply is 230 volts 60 hz?
If the appliance is strictly resistive heating there will be no problem. If the appliance has a motor load connected with it, the unit will operate a bit slower and operate a bit warmer.
