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I assume your question relates to the need for a disconnect switch. To meet code you need a disconnect switch in the proximity of the motor so that should the need arise the motor can be disconnected for safe maintenance or in an emergency. The motor will work directly connected, but you will create a safety issue.
Wiki User
∙ 12y ago
Wiki User
∙ 15y agoPhysically yes, but its not to code. The motor that is connected to a three phase system has to have undervoltage protection and thermal protection to be complient to the electrical code. This is done with a three phase motor contactor. By using a contactor you have the ability to start and stop the motor. The overload protection is also combined with the contactor so if the motor gets into an overload state the contactor will automatically disconnct it from the supply. Also if there is a power failure when the motor was running the motor will be unable to start up again on resumption of power. The start button has to be pushed to re start the motor, (this is the under voltage protection). This is why the supply voltage is NEVER directly connected to a motor.
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What is the voltage rating of a motor on a 3 phase 4 wire 277V lighting circuit?
If the motor is a three phase the most likely voltage the motor operates on will be 480 volts.
What is the minimum voltage a 115vac 400hz 3 phase motor will run?
Yes the minimum voltage of an 115vac 400 Hz 3 phase motor will run. You can run a single phase motor on a three service but you cannot be run on a single phase.
How do i switch a 3 phase motor from low to high voltage?
You can't. You must supply the motor with it's required voltage. If it's a dual voltage motor, follow the wiring schematic on the motor nameplate to switch from low to high voltage.
Will you produce a 3 phase voltage if you rotate a 3 phase motor physically at its specified rpm?
yes
How three phase line current convert in single phase?
The current is the same in the three live wires. The voltage can be described as the line voltage (phase to neutral) or the phase voltage (phase to phase) which is larger by a factor of sqrt(3). So a line voltage of 230 v corresponds to a phase voltage of 400 v.
What voltage is found on a single phase motor?
Ac voltage
What is the phase voltage inside a motor if one phase is lost and what is the voltage between the other two phases?
The phase voltage is usually constant and determined by the supply voltage.
What is the running amps of a 45 kW motor?
To answer this question the motor's voltage must be stated and whether the supply voltage is single phase or three phase.
What is the voltage rating of a motor on a 3 phase 4 wire 277V lighting circuit?
If the motor is a three phase the most likely voltage the motor operates on will be 480 volts.
What is the minimum voltage a 115vac 400hz 3 phase motor will run?
Yes the minimum voltage of an 115vac 400 Hz 3 phase motor will run. You can run a single phase motor on a three service but you cannot be run on a single phase.
Can i run single phase dc motor from 3phase bldc controller. i m using single phase motor in motorcycle and controller from other electric vehicle. if yes please tell me how to connect it?
It is possible to run a DC motor on a 3-phase supply using a full-wave rectifier if the voltage is right.
How to connect 3 phase power factor correction capacitor?
how to connect power capacitor with 3 phase motor
Can you replace a 480-240V 3-phase motor with a single phase motor as a temporary replacement or will it burn it out?
Yes, you can, and it won't burn out IF>>> the horsepower rating is the SAME. Pay attention to wiring and motor rotation. Also check the voltage: the motor voltage must be the same as the voltage between two hots of your 3 phase system. You will only use two hots as this is a single phase motor.
How do you determine a 3 phase motor and each winding?
To see if the motor is three phase or single phase look at the motor's nameplate. There it will tell you what the voltage needs to be and what system phase the motor needs to be connected to operate properly.
Can a 415volt 3phase motor run on 525 volt 3 phase?
It is not advisable to run lower voltage motor on a higher voltage.
How do i switch a 3 phase motor from low to high voltage?
You can't. You must supply the motor with it's required voltage. If it's a dual voltage motor, follow the wiring schematic on the motor nameplate to switch from low to high voltage.
You have 230v 3 phase power can you plug a 230v single phase motor into it?
Any two legs of a three phase system are classed as single phase. So yes a single phase motor will operate when connected. Be sure to use the proper motor protection devices to control the motor.
