Question Bauer Capitano II 480V 3 Phase to 240V Single Phase Help

[tbone1004]

@Angelo Farina you need fuses between the drive and the motor, if the motor shorts you don't want it to take the drive with it

 

[BRT]

@Angelo Farina you need fuses between the drive and the motor, if the motor shorts you don't want it to take the drive with it

How are they bumping the voltage up from 220 to 380? @tbone1004, have you ever used one of those Chinese drives? Price is sure right.

 

[Angelo Farina]

@Angelo Farina you need fuses between the drive and the motor, if the motor shorts you don't want it to take the drive with it

That is an electronically-controlled inverter, also called a Variable Frequency Drive. It is not just a transformer. If the load absorbs a current exceeding the preset limit, the inverter will cut the supply. No need of any fuses between the inverter and the motor.
Furthermore, this motor is a top-qualty Toshiba heavy duty motor. Designed for running indefinitely at maximum load.
It is much more probable that the inverter fails than the motor...

 

[tbone1004]

How are they bumping the voltage up from 220 to 380? @tbone1004, have you ever used one of those Chinese drives? Price is sure right.

Some drives will have transformer functions built into them, though relatively uncommon in the US outside of input 110v output 220v

That is an electronically-controlled inverter, also called a Variable Frequency Drive. It is not just a transformer. If the load absorbs a current exceeding the preset limit, the inverter will cut the supply. No need of any fuses between the inverter and the motor.
Furthermore, this motor is a top-qualty Toshiba heavy duty motor. Designed for running indefinitely at maximum load.
It is much more probable that the inverter fails than the motor...

It does depend on which VFD is being used, many of the manufacturers will recommend to put fast acting fuses after some of the smaller drives, often to protect the motor from a drive failure, but you should read the manual because they're all different, even within the same manufacturer.

 

[Angelo Farina]

Reading tha manual and following carefully the wiring instructions are rules to always follow when operating powerful electrical devices.
Said that, a VFD is not rocket science. They are used everywhere, for controlling pumps, ventilators, and motors of any size.
However, who is not sure about wiring the power cable of a domestic appliance, should ask for some qualified help for connecting to a plug providing the required power.
My recommendation is that all parts of your domestic grid should always be wired after a differential safety switch.
When such a device is installed, the risks are strongly mitigated: you can touch the live wire with bare fingers and nothing happens, you simply cause the switch to cut off the supply.
The usage of old-style fuses is very American. Here in Europe domestic system do not use any fuse. I did see some of them only in home systems wired before 1985, the year when electronic safety circuits were made mandatory here in Europe.

 

[BRT]

Some drives will have transformer functions built into them, though relatively uncommon in the US outside of input 110v output 220v

It does depend on which VFD is being used, many of the manufacturers will recommend to put fast acting fuses after some of the smaller drives, often to protect the motor from a drive failure, but you should read the manual because they're all different, even within the same manufacturer.

A transformer capable of 5 hp 3 phase is a lot heavier and bigger and more expensive than that drive. I really wonder how they do it.

 

[BRT]

Reading tha manual and following carefully the wiring instructions are rules to always follow when operating powerful electrical devices.
Said that, a VFD is not rocket science. They are used everywhere, for controlling pumps, ventilators, and motors of any size.
However, who is not sure about wiring the power cable of a domestic appliance, should ask for some qualified help for connecting to a plug providing the required power.
My recommendation is that all parts of your domestic grid should always be wired after a differential safety switch.
When such a device is installed, the risks are strongly mitigated: you can touch the live wire with bare fingers and nothing happens, you simply cause the switch to cut off the supply.
The usage of old-style fuses is very American. Here in Europe domestic system do not use any fuse. I did see some of them only in home systems wired before 1985, the year when electronic safety circuits were made mandatory here in Europe.

GFCI on the input isn't going to help you on the output of a VFD.

 

[happy-diver]

Hey Paisan it is always admirable that people do research
but if the information is wrong or it's designed to deceive
when repeated by the unknowing the myths become fact

There is no way Jose that you can start and run successfully a breathing air compressor
especially under load where the torque and voltage needed are more than humongous

YOU CAN NOT RUN A 415v 3 PHASE BREATHING AIR COMPRESSOR WITH A 240v VFD

 

[Miyaru]

I've been reading along and wondering how the required power is going to be delivered through just 2 wires.
It doesn't matter if you transform 1 phase into 3 with a VFD, the power requirement stays the same.

So calculate how much current will run through your single phase 230V cable.

And when using a cheap VFD, turn on your television plugged into the same net. See any distortions? Your neighbors will see them too.

 

[tbone1004]

I've been reading along and wondering how the required power is going to be delivered through just 2 wires.
It doesn't matter if you transform 1 phase into 3 with a VFD, the power requirement stays the same.

So calculate how much current will run through your single phase 230V cable.

And when using a cheap VFD, turn on your television plugged into the same net. See any distortions? Your neighbors will see them too.

current typically isn't a problem on this side of the pond. Most of our clothes dryer outlets are rated for 30a which is about 7kw so you can easily run a 7.5-8hp motor out of those outlets.

who's still running a tube tv? and those must be very cheap VFD's if they're backfeeding like that, they're not supposed to.