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In the United States, 480 Volts (AC) is a nominal system voltage before it is distributed to the device being powered. Line losses (measured in volts) occur throughout the distribution system due to current passing through wires and devices which have a resistance. Manufacturers of end use devices, such as motors, take this into account and list their devices as 460 volt devices.
So, what this means is that you will see Transformers and circuit breakers with nameplates at 480 Volts (AC), and motor nameplates at 460 Volts (AC).
Older 3-phase motors may actually have nameplates for 440 Volts, but all new motors in this voltage range would be listed as 460 Volt motors.
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Can you run a 460v 60hz motor to a 480v supply?
The the supply stays within +/- 5% of what the motor is rated for, you can do this.
What happen to the 480v rated motoe when connected to 440v power?
Depending on the design of the motor, it may just run with less torque/hp. It might run slightly hotter as well, depending on the load.
Can you feed a 208v 200amp panel from 480v 20amp circuit?
Not directly, you would need to transform 480v circuit to 120v with a transformer first.
What does 277 vac mean?
That's 277 volts of alternating current. This is typically one phase of a 480v 3 phase system. Don't worry that 3 x 277 adds up to more than 480v. A 277v line is typically one phase of a 480v 3 phase system.
What cable size of wire if the machine is 50hp?
If it is a 480v 3 pH machine, #4 wire will be fine.
Can you run a 460v 60hz motor to a 480v supply?
The the supply stays within +/- 5% of what the motor is rated for, you can do this.
What happen to 440v motor running at 480v?
Depends on the motor. If it is a synchronous motor it will run too fast.
Can I run laundry equipment 440V 60hz 3 pH on a 480V 60Hz system?
This should not be a problem but check with the manufacturer of the laundry equipment to be certain.
What happen to the 480v rated motoe when connected to 440v power?
Depending on the design of the motor, it may just run with less torque/hp. It might run slightly hotter as well, depending on the load.
Why does one line of 3 phase 480v show 0 volts and the other 2 have 480?
My first thought is this is probably a corner grounded delta system, but I'm confused by your voltages. If this was a 460v (L-L voltage) ungrounded or corner grounded system, the phase to ground voltage is meaningless, but the phase to phas voltage will be 460v all around the delta. If you have a 460v system and you're only seeing 230v, there's something wrong.
Can you feed a 208v 200amp panel from 480v 20amp circuit?
Not directly, you would need to transform 480v circuit to 120v with a transformer first.
Can a 3 phase 415V- 1000V step up transformer operate correctly from 460V Ac supply without causing damage?
That's an 11% overvoltage (460/415), so this may be reaching the design limits of the transformer. If the system is actually run hot (say 105% of 460, or 480v), then I'd say no, unless specifically stated in test reports or design criteria. You should ask the manufacturer to be sure.
What is the acceptable voltage higher than 480v for a 480v inverter?
The voltage range should be marked on the case but without that information a 5% increase can be assumed, so 504 v.
What does 277 vac mean?
That's 277 volts of alternating current. This is typically one phase of a 480v 3 phase system. Don't worry that 3 x 277 adds up to more than 480v. A 277v line is typically one phase of a 480v 3 phase system.
Wh would someone divide16.4kva by 480v?
Answer: To determine the amperage in a circuit. Notes: Power (in watts) = Volts * Amps 16.4 KVA = 480V * Amps 16400 / 480 = Amps ~34.2 = Amps
What is the nominal voltage of a 150 kW 480 v generator?
480V.
A 240V to 480V Step up transformer with a load of 85 amps at 480v what amperage will the transformer draw if the primary is 240V?
Since this transformer has a ratio of 1:2 the load current on the 480V side just has to be doubled. 85 x 2 = 170A on the primary. 40.8 KVA transformer. To prove this just find the KVA of both sides and they should be equal.
