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One horsepower (electric motor) is 746 watts, so ten horsepower is 7460 watts. Divide that by a power factor (assumed) of 0.8 and you get 9325 volt-amps. Divide that by a voltage (again, assumed) of 240 and you get 39 amperes.
For calculation purposes the electrical code book states that a 10 horsepower motor at 240 volts will draw 50 amps. The motor's nameplate amperage that is driving the rotary phase converter should all ways be used first.
The electrical code requires a breaker for a motor to be 250% of the motor's operating full load current. 250% of 39 amperes is 97 amperes. I would use a 100 ampere breaker for a 10 horsepower motor.
If the motor rating is used from the code book values, then 50 x 250% would equal 125 amps and that is the size of the breaker that must be used. This is the reason that the motor's exact name plate amperage rating should be used. In the long run feeder wire costs could make a saving in the overall projected costs.
What else can I help you with?
What happen when 220v dc is applied to a 220v ac single phase transformer?
The current would rise until it blows the fuse or breaker and that would produce an arc as the transformer's inductance tries to maintain the current.
What type of transformer has only a single winding?
the auto transformer is the one winding transformer. it ismaily used in practical purpose.
How do you connect ammeter with ct in single phase?
If it's a split-phase system with centre-tapped transformer, then two ammeters are needed, one on each side.
What is the current of 1MVA transformer?
This depends on the voltage, and whether it is a three phase or single phase transformer.
How the voltage is induced in a single phase transformer?
The changing magnetic flux in the iron core of the transformer induces a voltage in the windings.
Why the need of harmonics in single phase transformer?
Harmonics are really not needed in single phase transformers.
How can I get 230 volt single pole wire from my house panel?
In North America you can not obtain 230 volts from just one single pole breaker. The distribution is like this, from a one pole breaker to neutral is 120 volts. From an adjacent breaker to neutral is 120 volts. From the adjacent breaker to adjacent breaker (breakers situated beside each other) the voltage will be 230 volts.If you want to incorporate a 120 to 230 volt transformer into the circuit you can obtain 230 volts. The primary side of the transformer will be connected to the 120 volt circuit and the secondary side of the transformer will output 230 volts. The transformer must be sized to the load amperage or the load wattage of the connected 230 volt load.
What happen when 220v dc is applied to a 220v ac single phase transformer?
The current would rise until it blows the fuse or breaker and that would produce an arc as the transformer's inductance tries to maintain the current.
Can a 220 VAC breaker be single pole or does it have to always be a double pole breaker?
A 220 VAC breaker can be single pole or double pole depending on the application. For standard 220 VAC circuits like most household appliances, a double pole breaker is typically used. However, in certain situations where only one hot wire is needed, a single pole breaker can be used for 220 VAC circuits.
What type of transformer has only a single winding?
the auto transformer is the one winding transformer. it ismaily used in practical purpose.
How do you connect ammeter with ct in single phase?
If it's a split-phase system with centre-tapped transformer, then two ammeters are needed, one on each side.
What is the current of 1MVA transformer?
This depends on the voltage, and whether it is a three phase or single phase transformer.
What is the maximum voltage capacity of a 240V single pole breaker?
The maximum voltage capacity of a 240V single pole breaker is 240 volts.
How many treasures can a professional face-breaker find in a single expedition?
A professional face-breaker can find multiple treasures in a single expedition.
What is the purpose of the 110 V single phase breaker?
The job of a breaker is to limit the amount of current that is applied to the size of wire that is connected to the breaker.
How do you convert a single breaker box with a 220 amp breaker supplying a hot tub to a 110 volt 30 amp breaker supplying an outlet?
: Replace the main panel breaker feeding the subpanel with a 30 amp breaker if it is currently larger (50A typical). Then you should be able to change your subpanel's 2 pole breaker to a couple of single pole 30A breakers. Use one of the single 30's for your 30A receptacle.: : : : IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB : SAFELY AND COMPETENTLY : REFER THIS WORK TO QUALIFIED PROFESSIONALS. : If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use an electrician's test meter having metal-tipped probes (not a simple proximity voltage indicator) to insure the circuit is, in fact, de-energized.
What transformer is needed to convert 220volts to 110 volts?
Yes, transformers which operate on 110 - 120 Volts exist. This question is probably incomplete as it only mentions one voltage: it could be for the primary or the secondary or for a single-winding auto-transformer. The missing information cannot be guessed...
