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The use of a breaker in a circuit is to protect the wire size used in the circuit from becoming overloaded. Using the wattage of the load does not help for breaker sizing because the breaker operates on amperage. Amperage can be found from wattage by using the following equation. I = W /E. Amps = Watts / Volts. As you can see the amperage can not be calculated because there is no voltage stated.
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What size breaker do you need for 9000W at 440V 3phase?
This formula will give you the amperage I = kw x 1000/1.73 x E x pf (pf = power factor). Take the amperage and multiply it by 125%. This will give you the breaker size that you need.
What size wire and breaker for a 240 volt single phase 20 kw electric furnace rated at 83.3 amps?
AWG #3 copper.
What size breaker would e needed for 10.8 amps?
In standard construction this would require a 15 amp breaker and 14 gauge copper wire.
What size generator do you need to move a 30 hp electric motor?
A 5 kW generator would turn it over but if the full 30 hp of mechanical power is needed, that would require about 30 kW of electric power from the generator.
What size breaker should be used for a 3.6 kW oven?
3000 / 240 = Amps. You de-rate a breaker by 20 % for continuous load like an oven. You could get by with a 20 Amp breaker and 12 AWG wire. However, I would recommend 30 Amps and 10 AWG for an oven for the long run.
What is breaker size for 62.19 KW 3 phase?
A breaker protects the wire size of the feeder that is connected to it. The amperage of the load must be found. Without a voltage stated the amperage from the wattage given can not be calculated. The equation for amperage when the kw is given is A = kW x 1000/1.73 x volts x pf. The pf constant to use is .9.
What is breaker size for 240 volt 9 KW?
The formula you are looking for is I = W/E.
What breaker size do you use for a 270 Kw power rated equipment and power supply of 380 vac 3 phase?
I=270000/380/1.732 I=410A USE: 500A CIRCUIT BREAKER
How do you calculate the dc circuit breaker rating for a given kw?
the given kw Divide by the your voltage
What size breaker do you need for 9000W at 440V 3phase?
This formula will give you the amperage I = kw x 1000/1.73 x E x pf (pf = power factor). Take the amperage and multiply it by 125%. This will give you the breaker size that you need.
What size wire and breaker for a 240 volt single phase 20 kw electric furnace rated at 83.3 amps?
AWG #3 copper.
What size breaker would e needed for 10.8 amps?
In standard construction this would require a 15 amp breaker and 14 gauge copper wire.
What is the Breaker size for 130 KW 3 Phase Chip collector fan working on 380 V?
Calculate the ampereage at .8 pf and take a breaker of 150% of ampere nd set the over current protection at 125% of full load current.
Moter cycle 25 kw what is this in cc?
Cant tell for sure. A good engine will have a small cc for its KW, while a crap one will require more cc. CC relates to the size of the engine, while kw refers to the power. Id say a 125 at a guess
What is the kw input on a 50amp breaker with a 208v three phase electrical feed?
7200
Can a 400 kw generator handle a 460 kw load?
Since the breaker that is installed on the generator set will be sized to the output of the 30 kW generator, the load will stay connected until the thermal trip of the breaker trips the load off line. This will be in the matter of seconds before it happens. To handle a 75 kW load and depending if it is an inductive or a resistive load you will need at least a 80 to 100 kW generator.
What size generator do you need to move a 30 hp electric motor?
A 5 kW generator would turn it over but if the full 30 hp of mechanical power is needed, that would require about 30 kW of electric power from the generator.
